Add movie-keyed pool index with multi-version movies, ČSFD title bridge, subtitles and miniDLNA library scoping

CHANGELOG.md

@@ -21,7 +21,125 @@ Each version entry uses these sections (include only those that apply):
 
 ## Unreleased
 
+### Changed
+- **The pool index is keyed by the movie, not by a file path** (index **v2**,
+  `src/core/movie.py`). A record used to describe one *file*, so a movie's
+  metadata was a passenger on one particular file — which is why the "primary
+  version" had to carry the tags, why removing it needed a metadata-rescue
+  hack, and why renaming a multi-version movie had to be disabled outright.
+  Now the record **is** the movie (`tmdb-603`, or a diacritics-folded
+  `name-<title>-<year>` slug without an id) and owns its files:
+  ```json
+  "tmdb-19995": {"title": "Avatar", "year": "2009", "tmdb_id": 19995,
+                 "library": "Filmy", "tags": [...], "csfd_url": …,
+                 "media": [{"role": "video", "label": "",        "file": "…"},
+                           {"role": "video", "label": "3D HSBS", "file": "…"}]}
+  ```
+  Every version of a film therefore reads and writes **the same** metadata —
+  adding a version inherits it, removing any version (including the one shown
+  in the table) leaves it intact, and the rescue hack (plus the interim
+  `File.is_primary_version` flag) is gone. A newly seen file also joins an
+  existing record of the same identity instead of blanking its metadata.
+  `Movie.desired_layout` derives where the files belong from the record alone
+  (one video → flat in the library, two or more → its own
+  `Title (rok) [tmdbid]/` folder; a 3D label keeps Jellyfin's documented
+  `.3D.<FORMAT>` spelling in both layouts, other labels use `" - label"`) —
+  **not wired in yet**: `add_movie_version` / `remove_movie_version` still lay
+  files out themselves, and the edit dialog doesn't apply a recomputed layout
+  on rename. A move now updates the record's `library` as well.
+  `check_data_consistency` compares disk against the records' media paths.
+  `File` is now a *view* on one media entry of a record (same public
+  interface); `PoolIndex` gained `get_movie`/`set_movie`/`delete_movie`/
+  `rekey_movie`/`all_movies`/`find_movie_by_media`/`record_for`, and
+  **migrates a v1 index on first open** — metadata only, **no file is moved**
+  (a v1 movie already sits where v2 wants it), with the old index copied to
+  `.Curator.!index.v1.bak` first.
+
 ### Added
+- **Multiple versions of one movie** (Jellyfin's own "multiple versions" —
+  2D+3D, 4K+1080p, Director's Cut, …). A movie is identified by its
+  `(title, year, tmdbid)` and stays a **flat file** while it has exactly one
+  playable version (today's layout, unchanged). Adding a second version
+  **promotes it automatically** into its own folder — Jellyfin's required
+  shape, every file prefixed with the exact folder name:
+  ```
+  Title (rok) [tmdbid]/
+      Title (rok) [tmdbid] - Výchozí.ext
+      Title (rok) [tmdbid] - 3D HSBS.ext
+  ```
+  *Upravit film* gets a **„Verze"** list — **"➕ Přidat verzi…"** (pick a file,
+  then a small `VersionLabelDialog`: a **3D formát** preset — its label becomes
+  exactly `3D <FORMÁT>`, the same tokens Jellyfin scans for in a flat
+  `.3D.<FORMÁT>` filename — or free text for a non-3D version like `4K` /
+  `Director's Cut`) and **"➖ Odebrat verzi"** (removing down to one version
+  **demotes back to flat** automatically). The table still shows **one row
+  per movie** — a group's other versions live only in that list, not as
+  separate rows (`FileManager.visible_movies`; the row shown is the plain /
+  `Výchozí` version, `primary_version`). All versions share **one metadata
+  record** (see *Changed → index v2*), so a new version inherits the title/
+  tags/ČSFD/atributy and removing any version — even the one shown in the table
+  — leaves them intact. Renaming/moving/retitling a grouped movie isn't
+  supported yet (those fields are disabled in the edit dialog; remove the
+  version or edit the files directly). `FileManager.is_movie_group_member` /
+  `list_movie_versions` / `primary_version` / `add_movie_version` /
+  `remove_movie_version`. Scoped to `movie`-kind libraries for now —
+  `mixed`-library grouped movies are a follow-up (their subfolders are still
+  read as series only).
+- **3D movie tagging** (`naming.py`, Jellyfin's own convention —
+  https://jellyfin.org/docs/general/server/media/movies/). *Upravit film* gets
+  a **„3D formát"** dropdown (žádný / HSBS / FSBS / HTAB / FTAB / MVC),
+  pre-filled from the current filename; picking one renames the pool file to
+  `Title (rok) [tmdbid].3D.<FORMÁT>.ext`. The tag is preserved across every
+  future rename (editing other fields, "Přejmenovat dle metadat") the same way
+  `[tmdbid-N]` already is — `canonical_pool_stem` / `parse_3d_format` /
+  `THREE_D_FORMATS`; `apply_movie_edits(format_3d=…)` (omitted = keep, `""` =
+  clear). This is for a movie that's **only ever going to have one file** —
+  deliberately **not** exposed in the import dialog: importing a second file
+  for a movie already in the pool that way would create a plain, ungrouped
+  duplicate instead of a proper version (see "Multiple movie versions" above,
+  which is the right tool for 2D+3D of the same film). `import_movie` still
+  takes `format_3d=…` as a building block, just with no UI wired to it.
+- **miniDLNA hardcopies `homevideo` libraries too.** A `homevideo` library
+  (no TMDb id, arbitrary internal structure) has no genre tags to build a tree
+  from — same reasoning as series — so it's now mirrored whole into
+  `output/<název knihovny>` alongside the series copy-as-is mirrors
+  (`FileManager.mirror_as_is_libraries` = `series` + `homevideo`; the
+  series-only `copyasis_folders` used by the library organizer is unchanged).
+  Respects the per-library miniDLNA selection.
+- **miniDLNA covers series inside `mixed` libraries.** A `mixed` library's
+  top-level files are movies (genre-tagged as usual); any **series in its
+  subfolders** now get hardcopied into `output/Seriály/<vlastní název>/…` —
+  no genre tags apply to a series, so it bypasses the tag tree entirely, same
+  mechanism as a dedicated series library's copy-as-is mirror but scoped to one
+  series' own folder. Respects the per-library miniDLNA selection below.
+  `FileManager.minidlna_scope` now returns a third element, the in-scope
+  mixed-library `series.Series` list.
+- **miniDLNA: choose which libraries generate.** *miniDLNA → "Knihovny pro
+  generování…"* — a checklist of the pool's libraries (persisted in the pool
+  index, default = all, matching the previous behaviour). "Vygenerovat miniDLNA
+  strom" then only includes movies from the checked libraries in the genre tree
+  / Tipy dne / Nově přidané, and only mirrors checked series/homevideo
+  libraries — the dialog warns up front that unchecking one removes its output.
+  A movie library's genre-tree links are swept as obsolete the normal way; a
+  mirrored (series/homevideo) library or a mixed-library series has **no**
+  obsolete-link mechanism of its own, so deselecting one is handled explicitly:
+  `FileManager.minidlna_prune_targets` works out what fell out of scope (the
+  whole-library output folder, or — since a mixed-library series and a
+  same-named real library can share one output bucket like `Seriály` — just the
+  stale entries in it) and `HardlinkManager.remove_mirror` deletes it.
+  `FileManager.minidlna_libraries` / `set_minidlna_libraries` / `minidlna_scope`.
+- **External subtitle management for movies** (`src/core/subtitles.py`). Jellyfin
+  plays an external `.srt`/`.ass`/`.ssa`/`.sub`/`.vtt` natively when it shares the
+  video's filename stem (`Title (rok) [tmdbid].cs.srt`, optionally `.forced`/
+  `.sdh`/`.default`) — no muxing needed. *Upravit film* lists a movie's attached
+  subtitles and can **"➕ Přidat titulky…"** (pick a file, tag its language,
+  mark forced; copied in and named to match) or remove one. Subtitles now
+  **follow the movie through every rename/move** (`rename_movie`,
+  `apply_movie_edits`, `move_to_library`, `rename_to_canonical`, and
+  `rename_episodes_to_canonical` for series) instead of silently detaching —
+  `subtitles.rename_subtitles_with`. `FileManager.list_subtitles` /
+  `attach_subtitle` / `remove_subtitle`. Presence is read live from disk (like
+  NFO), nothing is cached in the pool index.
 - **Movies and series in one list.** The main table lists both as rows with a
   **Typ** column (Film / Seriál); size is the file size for a movie and the sum of
   the episodes for a series. Double-click (or the context menu) opens the right
@@ -52,7 +170,67 @@ Each version entry uses these sections (include only those that apply):
   imported into a mixed library and show up in the series overview/editor.
 - **ČSFD link stored as a second DB pointer** (`File.csfd_url`) — captured at
   import (a column in the movie import dialog) and editable in *Upravit film*.
-  Kept only as a pointer next to the TMDb id; nothing is fetched from ČSFD.
+- **ČSFD → TMDb title bridge** (`src/core/csfd.py`, lean revival of the removed
+  scraper). A direct TMDb search on a Czech distribution title is unreliable
+  (remakes, localized names); ČSFD indexes Czech release names well **and** lists
+  each film's *original* title, so the flow is: filename → ČSFD search → ČSFD
+  film page → original title + year → TMDb search → tmdbid.
+  - Import dialog: a second button **"🎬 Dohledat přes ČSFD"** next to "Dohledat
+    z TMDb". Per row it uses the filled ČSFD odkaz, else searches ČSFD by the
+    cleaned filename; fills ČSFD odkaz / TMDb ID / Název / Rok (blue = suggested).
+  - Migration: a movie carrying a `csfd_url` is resolved through ČSFD first, so
+    `match_pool_to_tmdb` searches on the original title + year (the proposal is
+    tinted blue with a *"přes ČSFD: …"* tooltip). `FileManager.resolve_via_csfd`.
+  - Search is scoped to the *Filmy* section and rejects two-segment episode
+    hrefs (a bare-title search otherwise returned a series episode); a yearful
+    query that misses is retried without the year. The original title is only
+    taken from a `.film-names` entry whose flag matches the country of origin —
+    a Czech film (which lists only foreign alt-titles there) keeps its `<h1>`
+    title instead of a random Slovenian/English one.
+  - Scope: a title→tmdbid bridge only — **no ČSFD tags/genres return** (those
+    stay TMDb-via-Jellyfin/NFO). ČSFD's Anubis proof-of-work wall is solved
+    (SHA-256, stdlib) and replayed over a shared session so a batch pays it once.
+- **Import rows pre-filled from metadata next to the source file.** When a picked
+  video sits next to metadata from an earlier Curator/Tagger setup, the import
+  row is seeded on open (no network) — **ČSFD odkaz**, Název, Rok (blue =
+  suggested, verify):
+  - `src/core/legacy_meta.py` — reads Curator's **pre-index** layouts: a per-file
+    `.{filename}.!tag` JSON sidecar (Tagger / early Curator; key `csfd_link`),
+    else a `.Curator.!index` found walking up the tree (matched by relative key,
+    then by unique basename). These win for the ČSFD link.
+  - `nfo.read_nfo` also parses a ČSFD id/URL from `<uniqueid type="csfd">` (bare
+    id or full URL) / legacy `<csfdid>` / `<csfd>` (`nfo.NfoData.csfd_url`), and
+    fills what the sidecar/index don't carry (notably the TMDb id).
+  - `ImportMoviesDialog._prefill_row`.
+- **Import: "Vynechat řádky bez TMDb ID".** A checkbox in the import dialog that
+  drops every row without a TMDb ID on OK — they are skipped (and no longer need
+  a year). Rows that would be skipped are shown struck-through/italic as the box
+  is ticked; the import summary reports how many were skipped
+  (`ImportMoviesDialog.skipped_no_tmdb`).
+- **Episode import: "📁 Přidat složku…".** The episode-import dialog can now take
+  a whole series folder and scans it **recursively** (all subfolders — `Season
+  01`, `Season 02`, …), adding every video file it finds (sidecars skipped);
+  season/episode still parsed per file. A canonical folder name
+  (`Title (rok) [tmdbid-N]`) also pre-fills the series title / year / TMDb ID.
+  The dialog now opens empty (add files or a folder from inside it).
+  `series.collect_episode_files`, `ImportEpisodesDialog._add_folder`.
+- **Episode import: editable SxxEyy per row.** The `SxxEyy` column is now an
+  editable field, pre-filled from the filename and colour-coded (green valid /
+  red unparsable / plain empty). Fill in an unrecognised episode (or fix a
+  mis-parsed one) right in the import dialog — `S01E05` / `1x05` both work; OK
+  warns before importing if any row still has no valid code.
+  `ImportEpisodesDialog.episode_codes` feeds a new `codes=` override on
+  `FileManager.import_episodes`.
+- **Remove a series from the pool.** *Seriály → "Odebrat z poolu…"*, the table
+  context menu (series-only selection, one or more), and a button in *Přehled
+  seriálů* delete a whole series folder — every season and episode — after a
+  confirm. `FileManager.remove_series` (refuses a folder outside the pool).
+- **Bulk-fix series episode filenames.** *Seriály → "Napravit názvy souborů…"*
+  goes over every series in the pool and renames each episode to
+  **`SxxEyy - {název seriálu}.ext`** in the right `Season NN` / `Specials`
+  folder, then removes the season folders emptied by the moves. Episodes with no
+  recognisable `SxxEyy` are left in place and listed (fix them in the series
+  editor). `FileManager.rename_all_series_to_canonical`.
 - **Pool migration to TMDb** (`src/core/migrate.py`, *Nástroje → "Spárovat pool
   s TMDb (migrace)…"*). Matches existing movies (no `tmdbid` yet) against TMDb by
   title + year and proposes an id, filling a missing year from TMDb. Conservative
@@ -71,11 +249,13 @@ Each version entry uses these sections (include only those that apply):
   Jellyfin to write NFO before the genre tree is populated.
 - **Movie edit dialog: dropped the free-form tags field**, added **ČSFD odkaz**
   (genre tags come from TMDb; manual tag editing isn't needed in the Jellyfin flow).
-- **Episode filenames now keep the original name:** `SxxEyy - {original}.ext`
+- **Episode filename is `SxxEyy - {série}.ext`** inside `Series (rok) [tmdbid]/
-  (was `Series SxxEyy.ext`), inside `Series (rok) [tmdbid]/Season NN/`. The
+  Season NN/`. The release string is deliberately dropped — identity is the
-  `SxxEyy` code is stripped from the original before re-applying, so repeated
+  `SxxEyy` code and Jellyfin fetches the episode title/metadata from TMDb
-  renames don't double it (`series.episode_body`); `episode_filename` /
+  (matched by the code + the folder's `[tmdbid-N]`); an empty/unsafe title
-  `is_canonical_episode` and the series import/rename/edit paths follow.
+  collapses to `SxxEyy.ext`. `episode_filename` takes the series title,
+  `is_canonical_episode(path, series_title)`, and import / rename / edit all
+  follow (`series.sanitize_title`).
 
 ### Fixed
 - **Movies can live in mixed libraries.** The import/edit/move dialogs and the

PROJECT.md

@@ -66,6 +66,16 @@ movie table, and one-click Filmotéka generation.
 - **Metadata storage:** one **unified metadata file** for the whole pool (a
   central index), not per-file sidecars. Justified because Curator owns the pool
   and files are never moved manually, so it is not exposed to path drift.
+- **The record is the movie, files are its children** (index **v2**,
+  `movie.py`). Keyed by identity (`tmdb-<id>`, else a `name-<slug>` fallback),
+  each record holds the metadata *and* a `media` list of its files with a free
+  `label` per version. Chosen after the v1 path-keyed shape made multi-version
+  movies unworkable: metadata rode on one file, so it had to be rescued when
+  that file went, and retitling a grouped movie had to be forbidden. With
+  identity as the key, `Movie.desired_layout()` is a pure function of the
+  record — **one video → flat, two or more → own folder** — so promote, demote
+  and rename are the same operation, and an import can recognise "this tmdbid
+  is already in the pool" instead of silently creating a duplicate.
 - **Config split by scope:** the global config (`.Curator.!gtag`) holds **app
   data only** — window state, MRU folders, and the `pool_dir` / `filmoteka_dir`
   pointers (which must stay global: the index is found *through* them). Everything
@@ -182,11 +192,29 @@ library manager**. Agreed shape:
   `Dokumenty` (mixed, mostly no-TMDb YT series), `Anime` (series), `Chajda`
   (homevideo). Kids are **not** a separate folder — see decisions.
 - **Naming convention:**
-  - Movie: `{CZ název} (rok) [tmdbid-N].ext` — the exact Jellyfin form.
+  - Movie: `{CZ název} (rok) [tmdbid-N].ext` — the exact Jellyfin form. A 3D
-  - Series: `{název série} (rok) [tmdbid]/Season NN/S{ss}E{ee} - {filename}.ext`
+    movie carries an extra `.3D.<FORMAT>` tag before the extension (Jellyfin's
-    (season 0 → `Specials`); the episode keeps its original filename after the
+    own convention; `FORMAT` ∈ `HSBS`/`FSBS`/`HTAB`/`FTAB`/`MVC`), set via the
-    `SxxEyy` code. Episode numbers are recognised from the filename; editable in
+    edit dialog and preserved across every future rename like the tmdbid is.
-    the series GUI.
+  - **Multiple movie versions** (2D+3D, 4K+1080p, …): identity is
+    `(title, rok, tmdbid)`, stays a **flat file** at one version. A second
+    version promotes it to Jellyfin's required per-movie folder — every file
+    prefixed with the exact folder name — `Title (rok) [tmdbid]/Title (rok)
+    [tmdbid] - {popisek}.ext`; a 3D version's popisek doubles as its 3D tag
+    (`3D HSBS`, scanned by Jellyfin the same as the flat `.3D.HSBS` form).
+    Curator does the promotion/demotion itself (*Upravit film → Verze*); the
+    table always shows one row per movie (`visible_movies`). Shared metadata
+    lives on one **primary** version (`File.is_primary_version`), migrated if
+    that one is ever removed. **Not yet supported:** renaming/moving/retitling
+    a grouped movie (remove the version or edit files directly), and grouped
+    movies inside `mixed` libraries (scoped to `movie`-kind for now — a mixed
+    library's subfolders are still read as series only).
+  - Series: `{název série} (rok) [tmdbid]/Season NN/S{ss}E{ee} - {série}.ext`
+    (season 0 → `Specials`). The episode filename is the code + the series title
+    only — the release string is dropped (identity is the code; Jellyfin fetches
+    episode metadata from TMDb via the code + `[tmdbid]`). Episode numbers are
+    recognised from the filename and editable at import / in the series GUI;
+    *Seriály → "Napravit názvy souborů…"* bulk-fixes the whole pool.
   - **CZ title source:** TMDb (cs-CZ) **primarily** — reliable when matched by
     `tmdbid` (yearless title search picks the wrong film, hence the earlier
     "weird names"); **ČSFD as fallback/override** (a ČSFD link at import, or when
@@ -195,15 +223,45 @@ library manager**. Agreed shape:
 - **Metadata is Jellyfin's job**: Jellyfin fetches from TMDb and (configured to)
   writes `.nfo` + artwork into the folders → survives a Jellyfin reinstall.
   Curator resolves a **TMDb id → title + year** for naming (`tmdb.py`). ČSFD is
-  kept **only** as an optional CZ-title source for the filename (not for tags/
+  kept **only** as a title source (not for tags/matching — it exposes no
-  matching — it exposes no TMDb/IMDb id, verified).
+  TMDb/IMDb id, verified): it feeds the **ČSFD → TMDb bridge** (`csfd.py`,
+  `FileManager.resolve_via_csfd`) — filename → ČSFD search → ČSFD *original*
+  title + year → TMDb search → tmdbid, more reliable than a raw Czech-title
+  TMDb search. Used by the import dialog ("Dohledat přes ČSFD") and by migration
+  for any movie with a stored `csfd_url`.
 - **Import:** mandatory **TMDb id** (matching + CZ title), optional **ČSFD link**
-  (CZ-title source/override); filename hand-editable before/after import.
+  (drives the ČSFD→TMDb bridge, and stored as a pointer); filename hand-editable
+  before/after import. The import row is pre-filled on open (no network) from
+  metadata already next to the source file: Curator's **pre-index** layouts —
+  a `.{filename}.!tag` sidecar or an old `.Curator.!index` up the tree
+  (`legacy_meta.read_legacy_meta`, authoritative for the ČSFD link) — then a
+  Kodi/Jellyfin `.nfo` (`nfo.read_nfo`, also reads a `csfd` `uniqueid` /
+  `<csfdid>`, and supplies the TMDb id).
 - **miniDLNA**: keep a genre-split **hardlink tree** for a dumb DLNA browser,
   but drive it from the **NFO** Jellyfin wrote (repurposing `HardlinkManager` +
-  `naming.py`), not from ČSFD tags.
+  `naming.py`), not from ČSFD tags. **Scoped per library** (*miniDLNA →
+  "Knihovny pro generování…"*, `minidlna_libraries` in the pool index, default
+  = all) — lets a library (e.g. Kids) be excluded from the dumb-DLNA output
+  entirely; a movie library's genre-tree links are swept as obsolete the normal
+  way when it's excluded. A `series` **or** `homevideo`-kind library has no
+  genre tags to build a tree from (homevideo has no TMDb id either), so both
+  hardcopy whole into `output/<jejich vlastní název>` (`mirror_as_is_libraries`)
+  — this works today independent of phase 8 (homevideo needs no GUI
+  import/browse support to be mirrored). Mirrors have **no obsolete-link
+  mechanism of their own**, so excluding one is pruned explicitly
+  (`FileManager.minidlna_prune_targets` + `HardlinkManager.remove_mirror`) —
+  including the shared `output/Seriály` bucket a mixed-library series and a
+  same-named real library can both write into, reconciled per-entry so pruning
+  one never erases the other's still-valid content.
 - **Jellyfin API** (thin, hybrid): trigger scans, verify, manage collections;
   key + URL in `.env`. NFO on disk stays authoritative.
+- **Subtitles stay external, never muxed** (`subtitles.py`): a `.srt`/`.ass`/
+  `.ssa`/`.sub`/`.vtt` sharing the video's stem (+ optional `.lang`/`.forced`/
+  `.sdh`/`.default`) plays natively in Jellyfin — no re-encode, multiple
+  languages side by side, easy to replace. Presence is read live from disk
+  (like NFO), not cached in the index. The one thing Curator owns: a subtitle
+  **follows its video through every rename/move** so it never silently
+  detaches (every rename/move path calls `subtitles.rename_subtitles_with`).
 
 ### Decisions (locked)
 
@@ -231,9 +289,9 @@ physical partitions + import-into / move-between [done]; (3) Jellyfin API — sc
 verify + status [done]; (4) miniDLNA genre tree from NFO + ČSFD removed [done];
 (5) series model — SxxEyy layout, import, rename [done]; (6) migrate the existing
 pool — title+year → TMDb search → tmdbid [done]; (7) consolidated edit dialogs +
-library organizer (unified `libraries` model with kinds) [done].
+library organizer (unified `libraries` model with kinds) [done]; (9) mixed-library
-Remaining: **(8) import without TMDb/year** (homevideo, no-TMDb docs);
+scanning + generation (movies + series in one folder) [done].
-**(9) mixed-library scanning + generation** (movies + series in one folder).
+Remaining: **(8) import without TMDb/year** (homevideo, no-TMDb docs).
 
 Note: libraries hold **flat** files for now (`pool/<Library>/Title (rok)
 [tmdbid].ext`); per-movie folders are a later refinement.
@@ -249,28 +307,42 @@ Note: libraries hold **flat** files for now (`pool/<Library>/Title (rok)
   skip the TMDb requirement; `movie` keeps requiring a year (as today).
 - `homevideo` library scanning: load its files as items (flat), no TMDb naming,
   no genre tags. Consider a dedicated import path or a per-import "bez TMDb" toggle.
+  **miniDLNA generation for `homevideo` needs none of this** — it hardcopies the
+  whole library folder as-is (`mirror_as_is_libraries` **[done]**); this task is
+  only about GUI import/browsing.
 - Tests: import with no year/id lands correctly; homevideo library loads.
 
 ### Phase 9 — mixed-library scanning + generation
 
-- Scan a `mixed` library by structure: a top-level **single video file = movie**;
+- Scanning **[done]**: a `mixed` library's top-level files load as movies
-  a subfolder containing `Season NN/` (or `SxxEyy` files) = **series**. Reuse
+  (`load_pool_movies`), its subfolders as series (`load_series` /
-  `series.scan_series` for the series part and the flat movie scan for the rest.
+  `series_libraries` = kind `series` **or** `mixed`, reusing `scan_series`).
-- `load_pool_movies` / `load_series` become **kind-aware** (iterate `libraries`,
+  Both are kind-aware over the unified `libraries` list. The library filter /
-  dispatch by kind); today they read `movie_libraries` / `copyasis_folders`.
+  table already surfaces mixed libraries.
-- miniDLNA generation + NFO refresh must cover mixed libraries too.
+- miniDLNA generation **[done]**: a mixed library's movies are genre-tagged as
-- The library filter / table should surface mixed libraries once loadable.
+  usual; series in its subfolders have no genre tags, so they're hardcopied
-- Tests: a mixed folder with both a movie and a series loads/generates correctly.
+  straight into `output/Seriály/<název>/…` instead
+  (`FileManager.minidlna_scope` → the mixed-library series list; the mirror
+  loop in `generate_filmoteka`). NFO refresh needs no separate handling — it
+  only ever touches movies (`self.filelist`), series never go through NFO/TMDb
+  tagging, mixed or not.
+- Tests: a mixed folder with both a movie and a series loads/generates
+  correctly **[done]** (`TestMinidlnaScope` in `test_file_manager.py`).
 
 ### Later / optional
 
-- **ČSFD CZ-title fetch (deferred).** Live test showed TMDb cs-CZ titles are good
+- **ČSFD → TMDb title bridge (done).** A direct TMDb search on a Czech title was
-  when matched by tmdbid, so ČSFD title-fetch was **not** rebuilt (would need the
+  matching the wrong film too often, so a lean `csfd.py` was revived (Anubis PoW
-  Anubis PoW solver removed in phase 4). If TMDb gets a title wrong, edit the
+  solver, film-page + search parsing, `original_title` extraction — the entry in
-  filename in the GUI. The ČSFD **link** is already stored per movie
+  `.film-names` whose flag matches the country of origin). `resolve_via_csfd`
-  (`File.csfd_url`, set at import / in the edit dialog) as a pointer for later —
+  drives it from the import dialog and from migration. **Not** a return of ČSFD
-  revisit fetching only if TMDb proves insufficient in practice.
+  tags — genres still come from TMDb via Jellyfin/NFO. Open follow-up: batch
-- Per-movie folders (`pool/<Lib>/Title (rok) [tmdbid]/…`) instead of flat files.
+  "look up ČSFD links for the whole pool" as a migration pre-pass (today the
+  `csfd_url` is per-movie, set at import / in the edit dialog).
+- Per-movie folders (`pool/<Lib>/Title (rok) [tmdbid]/…`) instead of flat
+  files — **partially done**: a movie only gets its own folder once it has a
+  second playable version (see "Multiple movie versions" below); a single-file
+  movie stays flat as before.
 - Collections / BoxSets (Bond, Marvel) via Jellyfin API or `<set>` in NFO.
 - Optional common umbrella folder above libraries (`pool/Média/<Lib>`) — needs
   path-aware `library_of` (currently single-segment).
@@ -280,6 +352,9 @@ Note: libraries hold **flat** files for now (`pool/<Library>/Title (rok)
 - Jellyfin pivot phases 1–7 (see Phasing): TMDb identity, tmdbid naming, movie
   libraries + move, Jellyfin API (scan/verify), NFO-driven miniDLNA + ČSFD
   removed, series model (SxxEyy), pool→TMDb migration, consolidated edit dialogs
+- Phase 9 — mixed-library scanning + generation: a `mixed` library's top-level
+  movies genre-tag as usual, series in its subfolders hardcopy into
+  `output/Seriály/<název>/…` (no genre tags apply to a series)
 - Library organizer (`libraries` unified model with kinds movie/series/mixed/
   homevideo; *Pool → Knihovny…*); `movie_libraries`/`copyasis_folders` derived
 - Pool naming convention `Title (YYYY).ext` (`naming.py`): year required at

src/core/csfd.py

@@ -0,0 +1,421 @@
+"""ČSFD.cz scraper — a *title bridge* to TMDb.
+
+Curator identifies movies by **TMDb id**. A direct TMDb search on a Czech
+distribution title is unreliable (remakes, localized names, "weird" hits).
+ČSFD, on the other hand, indexes Czech release names well **and** lists a
+film's *original* title. So the bridge is::
+
+    filename → ČSFD search → ČSFD film page → original title + year
+             → TMDb search → tmdbid
+
+This module only scrapes ČSFD; the TMDb half lives in
+:mod:`src.core.file_manager` (:meth:`FileManager.resolve_via_csfd`). Nothing
+here feeds tags/genres — those still come from TMDb via Jellyfin/NFO.
+
+ČSFD serves an **Anubis** proof-of-work wall in front of every page: a plain
+request gets a 200 with a JS challenge instead of the movie. We detect it,
+solve the SHA-256 PoW the way the bundled worker JS does, and replay the
+request through a shared :class:`requests.Session` (so a batch pays the PoW
+cost only once).
+"""
+from __future__ import annotations
+
+import hashlib
+import json
+import re
+import time
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Optional
+from urllib.parse import urlencode, urljoin
+
+from loguru import logger
+
+try:
+    import requests
+    from bs4 import BeautifulSoup
+
+    _HAS_DEPS = True
+except ImportError:  # pragma: no cover - exercised only without the extras
+    _HAS_DEPS = False
+    requests = None  # type: ignore
+    BeautifulSoup = None  # type: ignore
+
+CSFD_BASE_URL = "https://www.csfd.cz"
+CSFD_SEARCH_URL = "https://www.csfd.cz/hledat/"
+
+HEADERS = {
+    "User-Agent": (
+        "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) "
+        "Chrome/120.0.0.0 Safari/537.36"
+    ),
+    "Accept-Language": "cs,en;q=0.9",
+}
+
+# Anubis anti-bot wall: a plain GET returns a 200 challenge page, not the movie.
+ANUBIS_CHALLENGE_MARKER = 'id="anubis_challenge"'
+ANUBIS_PASS_PATH = "/.within.website/x/cmd/anubis/api/pass-challenge"
+# Safety cap so a difficulty bump can never spin forever (difficulty 1 needs ~16).
+ANUBIS_MAX_NONCE = 50_000_000
+
+
+class CsfdError(RuntimeError):
+    """A ČSFD lookup could not be completed (deps missing, network, anti-bot)."""
+
+
+@dataclass
+class CsfdFilm:
+    """The slice of a ČSFD film page Curator needs to reach a TMDb id."""
+
+    url: str
+    csfd_id: Optional[int] = None
+    czech_title: str = ""
+    original_title: str = ""
+    year: Optional[str] = None  # four-digit string, or None
+
+    @property
+    def tmdb_query(self) -> tuple[str, Optional[str]]:
+        """``(title, year)`` best suited for a TMDb search — original title first."""
+        return (self.original_title or self.czech_title, self.year)
+
+
+def dependencies_available() -> bool:
+    """True when ``requests`` + ``beautifulsoup4`` are importable."""
+    return _HAS_DEPS
+
+
+def _check_dependencies() -> None:
+    if not _HAS_DEPS:
+        raise CsfdError(
+            "ČSFD vyžaduje balíčky 'requests' a 'beautifulsoup4' "
+            "(poetry install je doplní)."
+        )
+
+
+def _extract_csfd_id(url: str) -> Optional[int]:
+    """Pull the numeric film id out of a ČSFD URL, or ``None``."""
+    match = re.search(r"/film/(\d+)", url)
+    return int(match.group(1)) if match else None
+
+
+# ---------------------------------------------------------------------------
+# Anubis proof-of-work (ported verbatim from the pre-Jellyfin csfd.py)
+# ---------------------------------------------------------------------------
+
+def _extract_json_blob(html: str, element_id: str):
+    """Return the parsed JSON from an Anubis ``<script id=...>`` blob, or None."""
+    match = re.search(
+        rf'<script id="{re.escape(element_id)}" type="application/json">(.*?)</script>',
+        html,
+        re.S,
+    )
+    if not match:
+        return None
+    try:
+        return json.loads(match.group(1))
+    except json.JSONDecodeError:
+        return None
+
+
+def _solve_anubis_pow(random_data: str, difficulty: int) -> tuple[str, int, int]:
+    """Brute-force the Anubis proof-of-work.
+
+    Mirrors the bundled ``sha256-purejs`` worker: find the smallest ``nonce``
+    such that ``sha256(random_data + str(nonce))`` has ``difficulty`` leading
+    zero nibbles. Returns ``(hash_hex, nonce, elapsed_ms)``.
+    """
+    full_zero_bytes = difficulty // 2
+    needs_half_byte = difficulty % 2 != 0
+    start = time.monotonic()
+    for nonce in range(ANUBIS_MAX_NONCE):
+        digest = hashlib.sha256(f"{random_data}{nonce}".encode()).digest()
+        if any(digest[i] != 0 for i in range(full_zero_bytes)):
+            continue
+        if needs_half_byte and digest[full_zero_bytes] >> 4 != 0:
+            continue
+        elapsed_ms = int((time.monotonic() - start) * 1000)
+        return digest.hex(), nonce, elapsed_ms
+    raise CsfdError(
+        f"Anubis PoW nevyřešen do {ANUBIS_MAX_NONCE} pokusů (obtížnost {difficulty})"
+    )
+
+
+def _solve_anubis_challenge(session, html: str, url: str):
+    """Solve the Anubis challenge in ``html`` and return the real page response."""
+    payload = _extract_json_blob(html, "anubis_challenge")
+    if not payload:
+        raise CsfdError("ČSFD anti-bot stránka bez čitelné Anubis challenge.")
+
+    rules = payload.get("rules", {})
+    challenge = payload.get("challenge", {})
+    random_data = challenge.get("randomData")
+    difficulty = int(rules.get("difficulty", 1))
+    if not random_data:
+        raise CsfdError("Anubis challenge neobsahuje randomData.")
+
+    base_prefix = _extract_json_blob(html, "anubis_base_prefix") or ""
+    logger.debug(f"Solving Anubis challenge (difficulty {difficulty}) for {url}")
+    hash_hex, nonce, elapsed_ms = _solve_anubis_pow(random_data, difficulty)
+    logger.debug(f"Anubis solved: nonce={nonce}, elapsed={elapsed_ms}ms")
+
+    pass_url = urljoin(CSFD_BASE_URL, f"{base_prefix}{ANUBIS_PASS_PATH}")
+    response = session.get(
+        pass_url,
+        params={
+            "id": challenge.get("id"),
+            "response": hash_hex,
+            "nonce": nonce,
+            "redir": url,
+            "elapsedTime": elapsed_ms,
+        },
+        headers=HEADERS,
+        timeout=10,
+    )
+    response.raise_for_status()
+    if ANUBIS_CHALLENGE_MARKER in response.text:
+        raise CsfdError("ČSFD Anubis challenge se nepodařilo vyřešit (odmítnuto).")
+    return response
+
+
+def _get_page(session, url: str):
+    """GET ``url`` through ``session``, transparently clearing an Anubis wall."""
+    response = session.get(url, headers=HEADERS, timeout=10)
+    response.raise_for_status()
+    if ANUBIS_CHALLENGE_MARKER in response.text:
+        response = _solve_anubis_challenge(session, response.text, url)
+    return response
+
+
+# ---------------------------------------------------------------------------
+# Page parsing
+# ---------------------------------------------------------------------------
+
+def _parse_json_ld(soup) -> tuple[str, Optional[str]]:
+    """``(name, year)`` from the film page's JSON-LD (name is the Czech title)."""
+    for script in soup.find_all("script", type="application/ld+json"):
+        try:
+            data = json.loads(script.string or "")
+        except (json.JSONDecodeError, TypeError):
+            continue
+        if isinstance(data, list):
+            data = next((d for d in data if d.get("@type") == "Movie"), None)
+        if not isinstance(data, dict) or data.get("@type") != "Movie":
+            continue
+        name = (data.get("name") or "").strip()
+        year: Optional[str] = None
+        for key in ("dateCreated", "datePublished"):
+            match = re.search(r"(19|20)\d{2}", str(data.get(key) or ""))
+            if match:
+                year = match.group(0)
+                break
+        return name, year
+    return "", None
+
+
+def _parse_origin(soup) -> tuple[Optional[str], Optional[str]]:
+    """``(origin_country, year)`` from the ``.origin`` line.
+
+    ČSFD separates values with inline bullet ``<span>`` elements (no commas),
+    e.g. ``USA • 1999 • 136 min``. For a co-production only the first country
+    is returned — enough to match it against a name's flag.
+    """
+    elem = soup.select_one(".origin")
+    if not elem:
+        return None, None
+    raw = elem.get_text(separator="|", strip=True)
+    tokens = [t.strip() for part in raw.split("|") for t in part.split(",")]
+    country: Optional[str] = None
+    year: Optional[str] = None
+    for token in tokens:
+        if not token:
+            continue
+        if year is None and re.fullmatch(r"(19|20)\d{2}", token):
+            year = token
+            continue
+        if (country is None and not token[0].isdigit()
+                and re.search(r"[^\W\d_]", token)):
+            country = token.split("/")[0].strip()
+    return country, year
+
+
+# ČSFD flags older Czech films "Československo" while ``.origin`` may read "Česko".
+_CZ_ORIGIN_ALIASES = {"česko", "československo"}
+
+
+def _parse_original_title(soup, origin_country: Optional[str]) -> Optional[str]:
+    """The film's original title from ``.film-names`` — or ``None`` to use the CZ title.
+
+    Each ``<li>`` carries a country/language flag (``img.flag`` ``title``) and a
+    title. The original title is the entry whose flag matches the **country of
+    origin** (USA → "The Shawshank Redemption"). ČSFD does **not** repeat the
+    Czech title here when it equals the ``<h1>``, so a Czech film has only
+    foreign/festival alt-titles in this list (``[angličtina] Cosy Dens``,
+    ``[Slovinsko] Samotarji``) — picking one of those would be wrong, so we
+    return ``None`` and let the caller fall back to the Czech ``<h1>`` title.
+    """
+    names: list[tuple[str, str]] = []
+    for li in soup.select(".film-names li"):
+        flag = li.select_one("img.flag")
+        country = str(flag.get("title") or "").strip() if flag else ""
+        for junk in li.select("span, img"):
+            junk.extract()
+        text = " ".join(li.get_text(" ").split()).strip(" ·")
+        if text:
+            names.append((country, text))
+    if not names or not origin_country:
+        return None
+    wanted = origin_country.casefold()
+    for country, text in names:
+        here = country.casefold()
+        if here == wanted or (wanted in _CZ_ORIGIN_ALIASES
+                              and here in _CZ_ORIGIN_ALIASES):
+            return text
+    return None
+
+
+def fetch_film(url: str, session=None) -> CsfdFilm:
+    """Fetch a ČSFD film page → :class:`CsfdFilm` (Czech + original title, year).
+
+    Pass a shared ``requests.Session`` to reuse the Anubis auth cookie across a
+    batch. Raises :class:`CsfdError` on a network / anti-bot / parse failure.
+    """
+    _check_dependencies()
+    own_session = session is None
+    if own_session:
+        session = requests.Session()
+    try:
+        html = _get_page(session, url).text
+    except requests.RequestException as exc:
+        raise CsfdError(f"Nelze načíst ČSFD stránku: {exc}") from exc
+    finally:
+        if own_session:
+            session.close()
+
+    soup = BeautifulSoup(html, "html.parser")
+    czech_title, year = _parse_json_ld(soup)
+    origin_country, origin_year = _parse_origin(soup)
+    year = year or origin_year
+    if not czech_title:
+        header = soup.select_one(".film-header-name h1")
+        czech_title = header.get_text(strip=True) if header else ""
+    original_title = _parse_original_title(soup, origin_country) or czech_title
+    return CsfdFilm(
+        url=url,
+        csfd_id=_extract_csfd_id(url),
+        czech_title=czech_title,
+        original_title=original_title,
+        year=str(year) if year else None,
+    )
+
+
+def _films_section(soup):
+    """The ``<section>`` holding the *Filmy* results, or the whole document.
+
+    ČSFD's search page groups hits into ``Filmy`` / ``Seriály`` / ``Tvůrci`` /
+    ``Uživatelé`` sections; ``a.film-title-name`` matches in all of them, so
+    without scoping a bare-title search happily returns a series episode.
+    """
+    for section in soup.find_all("section"):
+        header = section.select_one(".box-header h2") or section.find("h2")
+        if header and header.get_text(strip=True).casefold() == "filmy":
+            return section
+    return soup
+
+
+def _is_film_href(href: str) -> bool:
+    """True for a film URL ``/film/<id>-slug/`` — a series episode has two segments
+    (``/film/<series>/<episode>/``) and is rejected."""
+    parts = [p for p in href.split("/") if p and p != "prehled"]
+    return len(parts) == 2 and parts[0] == "film"
+
+
+def search_films(query: str, limit: int = 5, session=None) -> list[CsfdFilm]:
+    """Search ČSFD for ``query``; film hits only (no series/episodes), best first."""
+    _check_dependencies()
+    if not query.strip():
+        return []
+    search_url = f"{CSFD_SEARCH_URL}?{urlencode({'q': query.strip()})}"
+    own_session = session is None
+    if own_session:
+        session = requests.Session()
+    try:
+        html = _get_page(session, search_url).text
+    except requests.RequestException as exc:
+        raise CsfdError(f"ČSFD hledání selhalo: {exc}") from exc
+    finally:
+        if own_session:
+            session.close()
+
+    soup = BeautifulSoup(html, "html.parser")
+    films: list[CsfdFilm] = []
+    for anchor in _films_section(soup).select("a.film-title-name"):
+        href = str(anchor.get("href") or "")
+        if not _is_film_href(href):
+            continue
+        films.append(CsfdFilm(
+            url=urljoin(CSFD_BASE_URL, href),
+            csfd_id=_extract_csfd_id(href),
+            czech_title=anchor.get_text(strip=True),
+        ))
+        if len(films) >= limit:
+            break
+    return films
+
+
+def find_csfd_url(query: str, session=None) -> Optional[str]:
+    """Return the first ČSFD film URL matching ``query``, or ``None``.
+
+    ČSFD's full-text search treats a trailing year as a search term (not a
+    filter) and can miss on ``"Title 2006"`` while ``"Title"`` hits — so a
+    yearful query with no result is retried without the year.
+    """
+    if not query or not query.strip():
+        return None
+    query = query.strip()
+    films = search_films(query, limit=1, session=session)
+    if not films:
+        without_year = re.sub(r"\s+(?:19|20)\d{2}$", "", query)
+        if without_year != query:
+            films = search_films(without_year, limit=1, session=session)
+    return films[0].url if films else None
+
+
+# Release-name tokens that mark the end of the actual title in a filename.
+_RELEASE_MARKERS = {
+    "bluray", "blu-ray", "brrip", "bdrip", "bdremux", "remux", "webrip", "web",
+    "web-dl", "webdl", "hdtv", "dvdrip", "dvd", "dvd5", "dvd9", "hdrip", "cam",
+    "ts", "tc", "x264", "x265", "h264", "h265", "hevc", "avc", "xvid", "divx",
+    "aac", "ac3", "eac3", "dts", "dd5", "ddp5", "truehd", "atmos", "flac",
+    "10bit", "8bit", "hdr", "hdr10", "dolby", "sdr", "proper", "repack",
+    "extended", "unrated", "remastered", "imax", "multi", "dual", "complete",
+    "internal", "limited", "uncut",
+}
+_YEAR_RE = re.compile(r"^(19|20)\d{2}$")
+_RESOLUTION_RE = re.compile(r"^\d{3,4}p$|^[24]k$", re.IGNORECASE)
+
+
+def clean_filename_to_query(filename: str) -> str:
+    """Turn a (possibly release-named) filename into a ČSFD search query.
+
+    Strips the path/extension, splits on common separators and keeps the words
+    before the first release marker (year, resolution, codec, source, …). The
+    detected year is appended back as a disambiguator::
+
+        "Matrix.1999.1080p.BluRay.x264-GROUP.mkv" -> "Matrix 1999"
+    """
+    stem = Path(filename).stem
+    tokens = [t for t in re.split(r"[.\s_]+", stem) if t]
+
+    title_words: list[str] = []
+    year: Optional[str] = None
+    for token in tokens:
+        bare = token.strip("()[]{}")
+        if _YEAR_RE.match(bare):
+            year = bare
+            break
+        if _RESOLUTION_RE.match(bare) or bare.lower() in _RELEASE_MARKERS:
+            break
+        title_words.append(token)
+
+    title = " ".join(title_words).strip() or re.sub(r"[.\s_]+", " ", stem).strip()
+    return f"{title} {year}".strip() if year else title

src/core/file.py

@@ -33,15 +33,64 @@ class File:
         # free-form per-movie attributes (e.g. "collection_sort"); usable in
         # miniDLNA filename templates via name_context.
         self.attributes: dict[str, str] = {}
+        # Identity key of the movie record this file belongs to (set on load /
+        # first save); ``None`` only for an index-less, in-memory File.
+        self._movie_key: str | None = None
         self.get_metadata()
 
+    def _identity_from_path(self) -> tuple[str, str, str | None, int | None, str]:
+        """``(key, title, year, tmdb_id, label)`` implied by this file's location.
+
+        A file inside its own ``Title (rok) [tmdbid]`` folder is one version of
+        that movie — identity comes from the **folder**, and the rest of its own
+        stem is the version label. A flat file carries both in its own name.
+        """
+        from .movie import identity_key
+        from .naming import (is_canonical_pool_stem, parse_3d_format,
+                             parse_pool_stem, parse_tmdb_id)
+
+        parent = self.file_path.parent.name
+        grouped = is_canonical_pool_stem(parent)
+        identity_stem = parent if grouped else self.file_path.stem
+        parsed = parse_pool_stem(identity_stem)
+        year = str(parsed[1]) if parsed else None
+        tmdb_id = parse_tmdb_id(identity_stem)
+        title = self.title or (parsed[0] if parsed else self.file_path.stem)
+
+        label = ""
+        if grouped and self.file_path.stem.startswith(f"{parent} - "):
+            label = self.file_path.stem[len(parent) + 3:]
+        elif parse_3d_format(self.file_path.stem):
+            label = parse_3d_format(self.file_path.stem) or ""
+        return identity_key(tmdb_id, title, year), title, year, tmdb_id, label
+
     def get_metadata(self) -> None:
-        record = self.index.get(self.file_path) if self.index is not None else None
+        """Load this file's metadata from the movie record that owns it.
-        if record is None:
+
+        Since the pool index became identity-keyed (see :mod:`src.core.movie`),
+        a File is a *view* on one media entry of a movie record — every version
+        of the same film therefore reads the same title/tags/ČSFD/… A file the
+        index doesn't know yet joins the movie of the same identity when there
+        is one (that's how a newly added version inherits the shared metadata
+        instead of blanking it), otherwise it starts a new record.
+        """
+        if self.index is None:
             self._init_new_metadata()
-            self.save_metadata()
+            return
-        else:
+
+        found = self.index.find_movie_by_media(self.file_path)
+        if found is not None:
+            self._movie_key, record = found
             self._apply_record(record)
+            return
+
+        self._init_new_metadata()
+        key, *_ = self._identity_from_path()
+        existing = self.index.get_movie(key)
+        if existing is not None:
+            self._movie_key = key
+            self._apply_record(existing)
+        self.save_metadata()
 
     def _init_new_metadata(self) -> None:
         self.new = True
@@ -101,9 +150,42 @@ class File:
                 self.tags.append(tag)
 
     def save_metadata(self):
-        """Persist metadata to the pool index; a no-op for an index-less File."""
+        """Persist metadata into this file's movie record (no-op without index).
-        if self.index is not None:
+
-            self.index.set(self.file_path, self._build_record())
+        Writes the shared fields onto the movie record and makes sure the
+        record lists this file among its media. A file the index has never seen
+        starts a new record under its own identity key.
+        """
+        if self.index is None:
+            return
+        from .movie import ROLE_VIDEO
+
+        derived_key, title, year, tmdb_id, label = self._identity_from_path()
+        key = self._movie_key or derived_key
+        record = self.index.get_movie(key) or {}
+        record.update(self._build_record())
+        # The file's actual location is the truth — a move must update this.
+        record["library"] = self._library_name()
+        record["title"] = title
+        record["year"] = year
+        record["tmdb_id"] = tmdb_id
+
+        # Keep this file listed exactly once, with the label its name implies.
+        rel = self.index._key(self.file_path)
+        media = [m for m in record.get("media", []) if m.get("file") != rel]
+        media.append({"role": ROLE_VIDEO, "label": label, "file": rel})
+        record["media"] = media
+
+        self.index.set_movie(key, record)
+        self._movie_key = key
+
+    def _library_name(self) -> str:
+        """Top-level pool folder this file sits in (its library), or ``""``."""
+        if self.index is None:
+            return ""
+        rel = self.index._key(self.file_path)
+        parts = Path(rel).parts
+        return parts[0] if len(parts) > 1 else ""
 
     def added_timestamp(self) -> float:
         """Epoch seconds for 'date added' — the stored ``added`` or the file mtime.
@@ -169,19 +251,43 @@ class File:
         self.save_metadata()
 
     def delete_metadata(self) -> None:
-        """Remove this file's metadata from the pool index (no-op without one)."""
+        """Drop this file from its movie record; the last one takes the record.
-        if self.index is not None:
+
-            self.index.delete(self.file_path)
+        Removing one version of a multi-version movie leaves the movie (and its
+        metadata) in place — only when its last media entry goes does the whole
+        record go with it.
+        """
+        if self.index is None:
+            return
+        found = self.index.find_movie_by_media(self.file_path)
+        if found is None:
+            return
+        key, record = found
+        rel = self.index._key(self.file_path)
+        record["media"] = [m for m in record.get("media", []) if m.get("file") != rel]
+        if record["media"]:
+            self.index.set_movie(key, record)
+        else:
+            self.index.delete_movie(key)
 
     def relocate(self, new_path: Path) -> None:
-        """Point this File at a new path, moving its metadata along.
+        """Point this File at a new path, moving its media entry along.
 
-        The physical file must already have been moved/renamed by the caller.
+        The physical file must already have been moved/renamed by the caller;
-        Drops the metadata under the old index key and rebinds to the new path;
+        this only repoints the movie record's media entry (and the File), so a
-        call ``save_metadata()`` afterwards to write it back.
+        rename never detaches a file from its movie.
         """
         if self.index is not None:
-            self.index.delete(self.file_path)
+            found = self.index.find_movie_by_media(self.file_path)
+            if found is not None:
+                key, record = found
+                old_rel = self.index._key(self.file_path)
+                new_rel = self.index._key(Path(new_path))
+                for media in record.get("media", []):
+                    if media.get("file") == old_rel:
+                        media["file"] = new_rel
+                self.index.set_movie(key, record)
+                self._movie_key = key
         self.file_path = Path(new_path)
         self.filename = self.file_path.name
 

src/core/file_manager.py

@@ -7,7 +7,10 @@ from .tag_manager import TagManager
 from .pool_index import PoolIndex
 from .utils import list_files
 from .integrity import check_video_integrity, ffmpeg_available, IntegrityResult
-from .naming import canonical_pool_stem, is_valid_year, parse_pool_stem, parse_tmdb_id
+from .naming import (
+    canonical_pool_stem, is_canonical_pool_stem, is_valid_year, parse_3d_format,
+    parse_pool_stem, parse_tmdb_id)
+from . import subtitles
 from typing import Callable, Iterable
 from src.core.config import (
     load_global_config, save_global_config, DEFAULT_TAG_SCHEMA
@@ -168,6 +171,118 @@ class FileManager:
         """Names of libraries matching any of ``kinds``."""
         return [lib["name"] for lib in self.libraries if lib["kind"] in kinds]
 
+    @property
+    def minidlna_libraries(self) -> list[str] | None:
+        """Libraries included in miniDLNA generation, or ``None`` for "all" (default).
+
+        Persisted in the pool index (it describes this pool, not app state) via
+        *miniDLNA → "Knihovny pro generování…"*. Names no longer in
+        :attr:`libraries` are dropped when read, so a renamed/removed library
+        can't silently wedge the selection.
+        """
+        idx = self._ensure_index()
+        raw = idx.get_setting("minidlna_libraries", None) if idx is not None else None
+        if raw is None:
+            return None
+        known = {lib["name"] for lib in self.libraries}
+        return [n for n in raw if n in known]
+
+    def set_minidlna_libraries(self, names: list[str] | None) -> None:
+        """Restrict miniDLNA generation to ``names``; ``None`` resets to "all"."""
+        self._set_setting_raw(
+            "minidlna_libraries", None if names is None else list(dict.fromkeys(names)))
+
+    def _set_setting_raw(self, key: str, value) -> None:
+        """Persist an arbitrary pool-index setting (no legacy-default fallback)."""
+        idx = self._ensure_index()
+        if idx is None:
+            raise RuntimeError("Pool není nastaven — není kam uložit nastavení.")
+        idx.set_setting(key, value)
+
+    def minidlna_scope(self) -> tuple[list[File], list[str], list]:
+        """``(movies, mirrored library names, mixed-library series)`` for miniDLNA.
+
+        Narrowed to :attr:`minidlna_libraries` when set — movies by
+        :meth:`library_of`, mirrored libraries by name, mixed-library series by
+        their library — otherwise the whole pool (today's behaviour). Excluding
+        a movie library here means its genre-tree links (and its share of "Tipy
+        dne" / "Nově přidané") are swept as obsolete on the next generation, not
+        merely skipped — the caller should say so before generating.
+
+        The **mirrored libraries** are ``series`` (copy-as-is) *and*
+        ``homevideo`` kinds — neither has genre tags to build a tree from
+        (homevideo carries no TMDb id either), so both are hardcopied whole
+        into ``output/<library name>`` instead of going through the tag tree.
+
+        A ``mixed`` library isn't itself mirrored (its top-level files are
+        movies, tagged into the genre tree like any other), but any **series
+        sitting in its subfolders** have no genre tags to speak of — those are
+        returned separately so the caller can hardcopy them too (e.g. into
+        ``output/Seriály/<jejich vlastní název>``).
+        """
+        selected = self.minidlna_libraries
+        mixed_libs = set(self.libraries_of_kind("mixed"))
+        if selected is not None:
+            mixed_libs &= set(selected)
+        mixed_series = (
+            [s for s in self.load_series() if s.library in mixed_libs]
+            if mixed_libs else [])
+
+        mirror_libs = self.mirror_as_is_libraries
+        if selected is None:
+            return list(self.filelist), mirror_libs, mixed_series
+        chosen = set(selected)
+        movies = [f for f in self.filelist if self.library_of(f) in chosen]
+        mirrors = [name for name in mirror_libs if name in chosen]
+        return movies, mirrors, mixed_series
+
+    def minidlna_prune_targets(
+        self, mirror_libs: list[str], mixed_series: list, mixed_series_bucket: str,
+    ) -> tuple[list[str], set[str]]:
+        """What miniDLNA output to remove for mirrors that fell out of scope.
+
+        ``mirror_libs`` / ``mixed_series`` come from :meth:`minidlna_scope` (the
+        *current* run's selection); ``mixed_series_bucket`` is the shared output
+        folder mixed-library series hardcopy into (e.g. ``"Seriály"``) — the same
+        name a real ``series``/``homevideo`` library may also use, so the two
+        sources are reconciled together rather than one blindly wiping the other.
+
+        Returns ``(stale_libraries, valid_bucket_children)``:
+
+        - ``stale_libraries`` — mirrored-library output folders (``output/<name>``)
+          to delete **entirely**: every :attr:`mirror_as_is_libraries` name no
+          longer in ``mirror_libs``, except one that shares the bucket's name
+          (reconciled via the second element instead).
+        - ``valid_bucket_children`` — basenames that must remain directly under
+          ``output/<mixed_series_bucket>`` this run: the in-scope mixed-library
+          series' own folder names, plus — when a real library named
+          ``mixed_series_bucket`` is itself in scope — that library's current
+          subfolders. Anything else found there is stale.
+        """
+        in_scope = set(mirror_libs)
+        stale = [name for name in self.mirror_as_is_libraries
+                 if name not in in_scope and name != mixed_series_bucket]
+
+        valid = {ser.folder.name for ser in mixed_series}
+        if mixed_series_bucket in in_scope:
+            pool = self.pool_dir
+            src = pool / mixed_series_bucket if pool else None
+            if src and src.is_dir():
+                valid |= {p.name for p in src.iterdir() if p.is_dir()}
+        return stale, valid
+
+    @property
+    def mirror_as_is_libraries(self) -> list[str]:
+        """Libraries hardcopied 1:1 into miniDLNA — ``series`` and ``homevideo``.
+
+        Neither has genre tags to build a tree from (homevideo has no TMDb id
+        either), so both mirror whole into ``output/<library name>`` instead of
+        going through the tag tree. A superset of :attr:`copyasis_folders`
+        (which the library organizer UI still calls "copy-as-is" and keeps
+        scoped to kind ``series`` only).
+        """
+        return self.libraries_of_kind("series", "homevideo")
+
     @property
     def copyasis_folders(self) -> list[str]:
         """Names of pool subfolders mirrored 1:1 (copy-as-is) — the series libraries."""
@@ -334,7 +449,7 @@ class FileManager:
 
         Returns a dict with:
             ok         — False if the pool isn't set (with 'error')
-            missing    — index keys whose file no longer exists on disk
+            missing    — indexed media files that no longer exist on disk
             untracked  — pool files (pool-relative) with no index entry
             index_count / disk_count — totals for the summary
         """
@@ -344,7 +459,14 @@ class FileManager:
                     "missing": [], "untracked": []}
 
         index = self.index or PoolIndex(pool)
-        index_keys = set(index.records.keys())
+        # Records are keyed by movie identity, so the paths to compare are the
+        # media entries listed inside them.
+        index_keys = {
+            media["file"]
+            for record in index.all_movies().values()
+            for media in record.get("media", [])
+            if media.get("file")
+        }
 
         disk_keys = set()
         for lib in self.libraries:
@@ -518,6 +640,7 @@ class FileManager:
         move: bool = False, on_conflict: str = "suffix",
         year: int | str | None = None, tmdb_id: int | str | None = None,
         library: str | None = None, csfd_url: str | None = None,
+        format_3d: str | None = None,
     ) -> File | None:
         """Bring a video file into a movie library and index its metadata.
 
@@ -527,6 +650,8 @@ class FileManager:
         ``tmdb_id`` when known — the form Jellyfin matches on); without a year it
         falls back to ``Title.ext``. The GUI import always supplies a year, so a
         library built through the app is uniformly ``Title (YYYY) [tmdbid-N].ext``.
+        ``format_3d`` (one of :data:`naming.THREE_D_FORMATS`) appends the
+        ``.3D.<FORMAT>`` tag right away, when the file is already a 3D rip.
 
         By default the original is **copied** (non-destructive). With ``move=True``
         the source file is moved into the pool instead, leaving nothing behind.
@@ -555,7 +680,7 @@ class FileManager:
         source = Path(source)
         safe_title = title.strip() or source.stem
         has_year = year is not None and str(year).strip() != ""
-        stem = (canonical_pool_stem(safe_title, year, tmdb_id) if has_year
+        stem = (canonical_pool_stem(safe_title, year, tmdb_id, format_3d) if has_year
                 else safe_title)
         target = movies / f"{stem}{source.suffix}"
 
@@ -600,7 +725,9 @@ class FileManager:
         extension is preserved; ``new_title`` is the bare name without it.
 
         Raises:
-            ValueError: empty name or a name containing a path separator.
+            ValueError: empty name, a name containing a path separator, or
+                ``file_obj`` is one version of a multi-version movie (renaming
+                just one file would orphan its siblings).
             FileExistsError: another pooled file already uses that name.
         """
         new_title = new_title.strip()
@@ -608,6 +735,10 @@ class FileManager:
             raise ValueError("Název nesmí být prázdný.")
         if "/" in new_title or "\\" in new_title:
             raise ValueError("Název nesmí obsahovat lomítka.")
+        if self.is_movie_group_member(file_obj):
+            raise ValueError(
+                "Film s více verzemi zatím nelze takhle přejmenovat — "
+                "odeber verzi nebo uprav soubory ve složce filmu ručně.")
 
         old_path = file_obj.file_path
         new_path = old_path.with_name(f"{new_title}{old_path.suffix}")
@@ -618,6 +749,7 @@ class FileManager:
             raise FileExistsError(f"Soubor „{new_path.name}“ už v poolu existuje.")
 
         old_path.rename(new_path)
+        subtitles.rename_subtitles_with(old_path, new_path)
         file_obj.relocate(new_path)
         file_obj.title = new_title
         file_obj.save_metadata()
@@ -626,13 +758,15 @@ class FileManager:
             self.on_files_changed(self.filelist)
         return file_obj
 
-    def _canonical_name_for(self, file_obj: File) -> str | None:
+    def _canonical_name_for(self, file_obj: File, *, include_3d: bool = True) -> str | None:
         """The ``Title (YYYY) [tmdbid-N]`` stem this movie should have, or ``None``.
 
         Uses the clean title and the year from the movie's metadata
         (``name_context``: cache → ``Rok`` tag → the current filename). A
         ``(YYYY)`` that leaked into the title is stripped so it isn't doubled, and
-        an existing ``[tmdbid-N]`` on the current filename is preserved. Returns
+        an existing ``[tmdbid-N]`` / ``.3D.<FORMAT>`` on the current filename is
+        preserved (``include_3d=False`` drops the 3D tag — used for a movie-group
+        **folder** name, where 3D becomes a per-version label instead). Returns
         ``None`` when no four-digit year is known.
         """
         ctx = file_obj.name_context()
@@ -644,13 +778,14 @@ class FileManager:
             title = parsed[0]
             year = year or str(parsed[1])
 
-        # Keep the TMDb id already in the pool filename, if any.
+        # Keep the TMDb id / 3D tag already in the pool filename, if any.
         tmdb_id = parse_tmdb_id(file_obj.file_path.stem)
+        format_3d = parse_3d_format(file_obj.file_path.stem) if include_3d else None
 
         title = title.replace("/", "-").replace("\\", "-").strip()
         if not (title and is_valid_year(year)):
             return None
-        return canonical_pool_stem(title, year, tmdb_id)
+        return canonical_pool_stem(title, year, tmdb_id, format_3d)
 
     def rename_to_canonical(self, file_obj: File) -> File | None:
         """Rename a pooled movie to ``Title (YYYY).ext`` from its metadata.
@@ -658,15 +793,20 @@ class FileManager:
         The year comes from the movie's metadata (NFO cache, falling back to a
         ``Rok`` tag or the existing filename). ``file_obj.title`` keeps the title
         (without the year). Does not fire ``on_files_changed`` — the caller
-        refreshes once after a batch.
+        refreshes once after a batch. A movie with multiple versions is skipped
+        (``None``) — renaming one version alone would orphan its siblings; use
+        the version tools in *Upravit film* instead.
 
         Returns:
             The file when renamed (or already canonical); ``None`` when no
-            four-digit year is known, so no canonical name can be built.
+            four-digit year is known (or the movie has multiple versions), so
+            no canonical name can be built.
 
         Raises:
             FileExistsError: another pooled file already uses that name.
         """
+        if self.is_movie_group_member(file_obj):
+            return None
         new_stem = self._canonical_name_for(file_obj)
         if new_stem is None:
             return None
@@ -680,6 +820,7 @@ class FileManager:
 
         parsed = parse_pool_stem(new_stem)
         old_path.rename(new_path)
+        subtitles.rename_subtitles_with(old_path, new_path)
         file_obj.relocate(new_path)
         if parsed is not None:
             file_obj.title = parsed[0]
@@ -740,7 +881,9 @@ class FileManager:
 
         Moves the file into ``pool/<new_library>/`` and re-indexes it under the
         new key. Raises:
-            ValueError: the target isn't a known movie library.
+            ValueError: the target isn't a known movie library, or ``file_obj``
+                is one version of a multi-version movie (moving just one file
+                would orphan its siblings).
             FileExistsError: a file of that name already sits in the target.
         """
         pool = self.pool_dir
@@ -749,6 +892,10 @@ class FileManager:
         new_library = new_library.strip()
         if new_library not in self.libraries_accepting_movies:
             raise ValueError(f"Neznámá knihovna „{new_library}“.")
+        if self.is_movie_group_member(file_obj):
+            raise ValueError(
+                "Film s více verzemi zatím nelze takhle přesunout — "
+                "odeber verzi, nebo přesuň celou složku filmu ručně.")
 
         old_path = file_obj.file_path
         dest_dir = pool / new_library
@@ -760,6 +907,7 @@ class FileManager:
             raise FileExistsError(f"V knihovně „{new_library}“ už „{old_path.name}“ je.")
 
         shutil.move(str(old_path), str(new_path))
+        subtitles.rename_subtitles_with(old_path, new_path)
         file_obj.relocate(new_path)  # drops the old index key, rebinds to the new
         file_obj.save_metadata()
 
@@ -772,13 +920,19 @@ class FileManager:
         tmdb_id: int | str | None = None, library: str | None = None,
         date: str | None = None, attributes: dict | None = None,
         tags: list[str] | None = None, csfd_url: str | None = None,
+        format_3d: str | None = None,
     ) -> File:
         """Apply all editable parameters of a movie at once (rename/move + metadata).
 
-        Renames the file to ``Title (rok) [tmdbid].ext`` (year permitting), moves
+        Renames the file to ``Title (rok) [tmdbid].3D.<FORMAT>.ext`` (year/3D
-        it into ``library``, and sets ``title`` / ``date`` / ``attributes`` /
+        permitting), moves it into ``library``, and sets ``title`` / ``date`` /
-        ``tags`` (a full ``["Category/Name", …]`` list; NFO-tag provenance is kept
+        ``attributes`` / ``tags`` (a full ``["Category/Name", …]`` list;
-        for the ones that remain). No-ops that don't change the path skip the move.
+        NFO-tag provenance is kept for the ones that remain). No-ops that don't
+        change the path skip the move.
+
+        ``format_3d`` follows :func:`naming.canonical_pool_stem`: omitted
+        (``None``) keeps whatever 3D tag the file already has, an empty string
+        clears it, one of :data:`naming.THREE_D_FORMATS` sets it.
 
         Raises:
             FileExistsError: the target name is already taken.
@@ -788,17 +942,33 @@ class FileManager:
             raise RuntimeError("Pool není nastaven.")
         title = (title or "").strip() or file_obj.file_path.stem
         year_s = str(year).strip() if year not in (None, "") else ""
-        stem = (canonical_pool_stem(title, year_s, tmdb_id)
+        grouped = self.is_movie_group_member(file_obj)
+        if format_3d is None:
+            format_3d = None if grouped else parse_3d_format(file_obj.file_path.stem)
+        stem = (canonical_pool_stem(title, year_s, tmdb_id, format_3d)
                 if is_valid_year(year_s) else title)
         lib = ((library or "").strip()
                or self.library_of(file_obj) or self.movie_libraries[0])
         old_path = file_obj.file_path
+
+        if grouped:
+            # Identity is locked to the container folder's name; only a
+            # no-op (title/year/tmdb_id/library all unchanged) is allowed
+            # here — metadata-only fields below still apply normally.
+            if stem != old_path.parent.name or lib != self.library_of(file_obj):
+                raise ValueError(
+                    "Film s více verzemi zatím nelze takhle přejmenovat/přesunout "
+                    "(rok/název/TMDb ID/knihovna) — odeber verzi, nebo uprav "
+                    "soubory ve složce filmu ručně. Datum/atributy/tagy/ČSFD "
+                    "odkaz upravit lze.")
+        else:
             new_path = pool / lib / f"{stem}{old_path.suffix}"
             if new_path != old_path:
                 if new_path.exists():
                     raise FileExistsError(f"Soubor „{new_path.name}“ už existuje.")
                 new_path.parent.mkdir(parents=True, exist_ok=True)
                 shutil.move(str(old_path), str(new_path))
+                subtitles.rename_subtitles_with(old_path, new_path)
                 file_obj.relocate(new_path)
 
         file_obj.title = title
@@ -826,6 +996,218 @@ class FileManager:
             self.on_files_changed(self.filelist)
         return file_obj
 
+    # ------------------------------------------------------------------
+    # Movie versions (Jellyfin "multiple versions": 2D + 3D, 4K + 1080p, …)
+    # ------------------------------------------------------------------
+    #
+    # A movie is identified by (title, year, tmdbid) — the canonical stem. As
+    # long as it has exactly one video file, it stays flat:
+    #   pool/<Library>/Title (rok) [tmdbid].ext
+    # The moment a second version is added, Curator promotes it to its own
+    # folder (Jellyfin's own "multiple versions" convention — every file in it
+    # must start with the folder's exact name):
+    #   pool/<Library>/Title (rok) [tmdbid]/
+    #       Title (rok) [tmdbid] - Výchozí.ext
+    #       Title (rok) [tmdbid] - 3D HSBS.ext
+    # Shared metadata (tags, ČSFD odkaz, datum, atributy) lives on whichever
+    # version is alphabetically first (Jellyfin's own "default version" rule —
+    # `visible_movies` shows only that one in the table). Renaming/moving/
+    # retitling a grouped movie is not supported yet (see the guards in
+    # `rename_movie` / `move_to_library` / `apply_movie_edits`) — remove a
+    # version (auto-demotes back to flat when one is left) or edit the files
+    # directly if you need that.
+
+    def is_movie_group_member(self, file_obj: File) -> bool:
+        """True when ``file_obj`` is one version inside its own per-movie folder.
+
+        Only recognised for ``movie``-kind libraries in this first cut — a
+        ``mixed`` library's subfolders are always treated as series.
+        """
+        pool = self.pool_dir
+        lib = self.library_of(file_obj)
+        if pool is None or lib is None or lib not in self.libraries_of_kind("movie"):
+            return False
+        parent = file_obj.file_path.parent
+        return parent != pool / lib and is_canonical_pool_stem(parent.name)
+
+    def list_movie_versions(self, file_obj: File) -> list[File]:
+        """Every version sharing ``file_obj``'s movie-group folder, name-sorted.
+
+        A single-element list (just ``file_obj``) when it isn't grouped.
+        """
+        if not self.is_movie_group_member(file_obj):
+            return [file_obj]
+        folder = file_obj.file_path.parent
+        versions = []
+        for p in sorted(folder.iterdir()):
+            if (not p.is_file() or p.suffix.lower() in SIDECAR_SUFFIXES
+                    or p.name.endswith(METADATA_SUFFIXES)):
+                continue
+            existing = next((f for f in self.filelist if f.file_path == p), None)
+            versions.append(existing or File(p, self.tagmanager, index=self.index))
+        return versions
+
+    def primary_version(self, versions: list[File]) -> File:
+        """Which version represents the movie in the table.
+
+        Metadata is shared by the whole movie record now, so this is purely a
+        display choice: the plain/unlabelled file first, then the one labelled
+        :data:`movie.DEFAULT_VERSION_LABEL`, then alphabetically. Unrelated to
+        which version Jellyfin plays by default (its own, alphabetical rule).
+        """
+        from .movie import DEFAULT_VERSION_LABEL
+
+        def rank(f: File) -> tuple[int, str]:
+            label = f._identity_from_path()[4]
+            order = 0 if not label else (1 if label == DEFAULT_VERSION_LABEL else 2)
+            return order, f.file_path.name.casefold()
+
+        return min(versions, key=rank)
+
+    def visible_movies(self) -> list[File]:
+        """``filelist`` collapsed to one row per movie for the table.
+
+        Ungrouped files pass through unchanged; a movie-group folder
+        contributes only its :meth:`primary_version` — the rest are reachable
+        via *Upravit film → Verze*, not as separate rows.
+        """
+        seen_folders: set[Path] = set()
+        result: list[File] = []
+        for f in self.filelist:
+            if not self.is_movie_group_member(f):
+                result.append(f)
+                continue
+            folder = f.file_path.parent
+            if folder in seen_folders:
+                continue
+            seen_folders.add(folder)
+            result.append(self.primary_version(self.list_movie_versions(f)))
+        return result
+
+    def add_movie_version(
+        self, file_obj: File, source: Path, label: str, *,
+        move: bool = False, existing_label: str = "Výchozí",
+    ) -> File:
+        """Add ``source`` as another playable version of ``file_obj``'s movie.
+
+        Promotes a flat movie to its own per-movie folder on the first extra
+        version — the pre-existing file is moved in as
+        ``<folder> - {existing_label}.ext`` (only on this first promotion) and
+        ``source`` lands as ``<folder> - {label}.ext``. A movie already grouped
+        just gets one more file in the same folder. Shared metadata stays
+        wherever it already was; the new version starts with none of its own
+        (attach subtitles / a 3D formát to it separately if needed).
+
+        Raises:
+            RuntimeError: no pool, or ``file_obj`` has no valid title+year yet.
+            ValueError: ``label`` is empty.
+            FileExistsError: a version of that name already exists.
+        """
+        label = (label or "").strip()
+        if not label:
+            raise ValueError("Popisek verze nesmí být prázdný.")
+        pool = self.pool_dir
+        if pool is None:
+            raise RuntimeError("Pool není nastaven.")
+        source = Path(source)
+
+        stem: str | None
+        if self.is_movie_group_member(file_obj):
+            folder = file_obj.file_path.parent
+            stem = folder.name
+        else:
+            stem = self._canonical_name_for(file_obj, include_3d=False)
+            if stem is None:
+                raise RuntimeError(
+                    "Film nemá platný název/rok — nejde založit složku verzí.")
+            lib = self.library_of(file_obj) or self.movie_libraries[0]
+            folder = pool / lib / stem
+            if folder.exists():
+                raise FileExistsError(f"Složka „{stem}“ už v poolu existuje.")
+            folder.mkdir(parents=True)
+            old_path = file_obj.file_path
+            existing_target = folder / f"{stem} - {existing_label}{old_path.suffix}"
+            shutil.move(str(old_path), str(existing_target))
+            subtitles.rename_subtitles_with(old_path, existing_target)
+            file_obj.relocate(existing_target)
+            file_obj.save_metadata()
+
+        target = folder / f"{stem} - {label}{source.suffix}"
+        if target.exists():
+            raise FileExistsError(f"Verze „{label}“ už existuje.")
+        if move:
+            shutil.move(str(source), str(target))
+        else:
+            shutil.copy2(source, target)
+        new_version = File(target, self.tagmanager, index=self.index)
+        new_version.added = datetime.now().isoformat(timespec="seconds")
+        new_version.save_metadata()
+        self.filelist.append(new_version)
+        if self.on_files_changed:
+            self.on_files_changed(self.filelist)
+        return new_version
+
+    def remove_movie_version(self, file_obj: File) -> None:
+        """Remove one version (+ its subtitles) from a movie's version group.
+
+        When exactly one version is left afterward, the movie is demoted back
+        to a flat file — moved out to the library root under the bare
+        canonical stem — and the now-empty folder is removed. Metadata needs no
+        rescuing: it lives on the movie record, not on any one version, so
+        removing even the version shown in the table leaves it untouched.
+
+        Raises:
+            ValueError: ``file_obj`` isn't part of a version group (nothing to
+                remove it *from* — a lone movie has no "versions" to drop).
+        """
+        if not self.is_movie_group_member(file_obj):
+            raise ValueError("Film nemá žádné další verze k odebrání.")
+        folder = file_obj.file_path.parent
+        file_obj.delete_metadata()
+        for sub in subtitles.find_subtitles(file_obj.file_path):
+            sub.path.unlink()
+        file_obj.file_path.unlink()
+        if file_obj in self.filelist:
+            self.filelist.remove(file_obj)
+
+        remaining = [
+            p for p in folder.iterdir()
+            if p.is_file() and p.suffix.lower() not in SIDECAR_SUFFIXES
+            and not p.name.endswith(METADATA_SUFFIXES)]
+        if len(remaining) == 1:
+            sole = remaining[0]
+            sole_file = next((f for f in self.filelist if f.file_path == sole), None)
+            new_path = folder.parent / f"{folder.name}{sole.suffix}"
+            sole.rename(new_path)
+            subtitles.rename_subtitles_with(sole, new_path)
+            if sole_file is not None:
+                sole_file.relocate(new_path)
+                sole_file.save_metadata()
+            shutil.rmtree(folder, ignore_errors=True)
+
+        if self.on_files_changed:
+            self.on_files_changed(self.filelist)
+
+    def list_subtitles(self, file_obj: File) -> list:
+        """External subtitle sidecars currently sitting next to a movie."""
+        return subtitles.find_subtitles(file_obj.file_path)
+
+    def attach_subtitle(
+        self, file_obj: File, source: Path, *, language: str | None = None,
+        flag: str | None = None, move: bool = False,
+    ) -> Path:
+        """Copy (or move) a picked subtitle file next to ``file_obj``, correctly named.
+
+        Raises:
+            ValueError: ``source`` isn't a recognised subtitle format.
+        """
+        return subtitles.attach_subtitle(
+            file_obj.file_path, source, language=language, flag=flag, move=move)
+
+    def remove_subtitle(self, subtitle_path: Path) -> None:
+        """Delete one attached subtitle file."""
+        Path(subtitle_path).unlink()
+
     def refresh_tags_from_tmdb(
         self, files: list[File] | None = None,
         on_progress: Callable[[int, int, File], None] | None = None,
@@ -867,6 +1249,43 @@ class FileManager:
         return {"ok": True, "updated": updated, "without_id": without_id,
                 "errors": errors}
 
+    def resolve_via_csfd(
+        self, *, csfd_url: str | None = None, query: str | None = None,
+        session: object | None = None,
+    ) -> dict:
+        """ČSFD → TMDb bridge for one movie.
+
+        With ``csfd_url`` set, reads that ČSFD film; otherwise searches ČSFD for
+        ``query`` (a cleaned filename) and takes the top hit. The ČSFD original
+        title + year then drive a TMDb search — far more reliable than a raw
+        Czech-title search. Pass a shared ``requests.Session`` to reuse the
+        Anubis auth cookie across a batch.
+
+        Returns ``{"csfd_url", "film": CsfdFilm | None, "tmdb": TmdbResult | None}``.
+        Best-effort: a network / anti-bot / no-match failure is a ``None`` in the
+        result, not an exception.
+        """
+        from . import csfd, tmdb
+        result: dict = {"csfd_url": csfd_url, "film": None, "tmdb": None}
+        try:
+            url = csfd_url
+            if not url and query:
+                url = csfd.find_csfd_url(query, session=session)
+            if not url:
+                return result
+            result["csfd_url"] = url
+            film = csfd.fetch_film(url, session=session)
+            result["film"] = film
+            title, year = film.tmdb_query
+            if title and tmdb.api_available():
+                hits = tmdb.search_movie(title, year=year, limit=1)
+                if not hits and film.czech_title and film.czech_title != title:
+                    hits = tmdb.search_movie(film.czech_title, year=year, limit=1)
+                result["tmdb"] = hits[0] if hits else None
+        except (csfd.CsfdError, tmdb.TmdbError, OSError):
+            pass
+        return result
+
     def match_pool_to_tmdb(
         self, files: list[File] | None = None,
         on_progress: Callable[[int, int, File], None] | None = None,
@@ -875,14 +1294,18 @@ class FileManager:
         """Propose a TMDb id for every movie that doesn't have one yet.
 
         Searches TMDb by each movie's title + year and classifies the result
-        (see :func:`migrate.classify`). Movies whose filename already carries a
+        (see :func:`migrate.classify`). A movie that carries a **ČSFD link**
+        (``File.csfd_url``) is first resolved through ČSFD so the search runs on
+        the *original* title + year — the pure Czech-title search picks the wrong
+        film for remakes/localized names. Movies whose filename already carries a
         ``[tmdbid-N]`` are skipped. Returns a list of ``migrate.MatchProposal``.
         """
-        from . import tmdb
+        from . import csfd, tmdb
         from .migrate import MatchProposal, classify
         targets = files if files is not None else self.filelist
         proposals: list = []
         total = len(targets)
+        csfd_session = None
         for i, f in enumerate(targets, 1):
             if should_cancel is not None and should_cancel():
                 break
@@ -896,14 +1319,28 @@ class FileManager:
             if parsed is not None:
                 title = parsed[0]
             year = str(ctx.get("year") or "").strip() or None
+
+            note = ""
+            if f.csfd_url and csfd.dependencies_available():
+                if csfd_session is None and csfd.requests is not None:
+                    csfd_session = csfd.requests.Session()
+                try:
+                    film = csfd.fetch_film(f.csfd_url, session=csfd_session)
+                except csfd.CsfdError:
+                    film = None
+                if film is not None and (film.original_title or film.czech_title):
+                    title = film.original_title or film.czech_title
+                    year = film.year or year
+                    note = f"přes ČSFD: {title}" + (f" ({film.year})" if film.year else "")
+
             try:
                 candidates = tmdb.search_movie(title, year=year, limit=5)
                 status, chosen = classify(title, year, candidates)
                 proposals.append(MatchProposal(
-                    f, f.filename, title, year, status, chosen, candidates))
+                    f, f.filename, title, year, status, chosen, candidates, note=note))
             except tmdb.TmdbError as exc:
                 proposals.append(MatchProposal(
-                    f, f.filename, title, year, "error", None, [], str(exc)))
+                    f, f.filename, title, year, "error", None, [], str(exc), note))
             if on_progress is not None:
                 on_progress(i, total, f)
         return proposals
@@ -973,17 +1410,21 @@ class FileManager:
         self, sources: list[Path], title: str, year: int | str | None = None,
         tmdb_id: int | str | None = None, library: str | None = None,
         move: bool = False, on_conflict: str = "suffix",
+        codes: dict[Path, tuple[int, int]] | None = None,
     ) -> dict:
         """Import episode files into ``<library>/Series (rok) [tmdbid]/Season NN/``.
 
-        Each source's season/episode is parsed from its filename and it is copied
+        Each source's season/episode comes from ``codes`` (an explicit
-        (or moved) in as ``Series SxxEyy.ext``. Files with no recognisable
+        ``{path: (season, episode)}`` override set at import time) when present,
-        ``SxxEyy`` are skipped and reported.
+        otherwise it is parsed from the filename. It is then copied (or moved) in
+        as ``Series SxxEyy.ext``. Files with neither an override nor a
+        recognisable ``SxxEyy`` are skipped and reported.
 
         Returns ``{imported, skipped_no_code, errors}``.
         """
         from .series import (
             parse_episode, series_folder_stem, season_folder_name, episode_filename)
+        codes = codes or {}
         pool = self.pool_dir
         if pool is None:
             raise RuntimeError("Pool není nastaven.")
@@ -996,21 +1437,21 @@ class FileManager:
         errors: list[str] = []
         for src in sources:
             src = Path(src)
-            code = parse_episode(src.name)
+            code = codes.get(src) or parse_episode(src.name)
             if code is None:
                 skipped_no_code.append(src.name)
                 continue
             season, ep = code
             dest_dir = pool / lib / stem / season_folder_name(season)
             dest_dir.mkdir(parents=True, exist_ok=True)
-            target = dest_dir / episode_filename(season, ep, src.stem, src.suffix)
+            target = dest_dir / episode_filename(season, ep, title, src.suffix)
             if target.exists():
                 if on_conflict == "skip":
                     continue
                 if on_conflict == "replace":
                     target.unlink()
                 else:  # suffix
-                    base = episode_filename(season, ep, src.stem, "")
+                    base = episode_filename(season, ep, title, "")
                     counter = 1
                     while target.exists():
                         target = dest_dir / f"{base}_{counter}{src.suffix}"
@@ -1027,7 +1468,7 @@ class FileManager:
                 "errors": errors}
 
     def rename_episodes_to_canonical(self, series) -> dict:
-        """Rename a series' episodes to ``Series SxxEyy.ext`` in the right season.
+        """Rename a series' episodes to ``SxxEyy - {series title}.ext`` in its season.
 
         ``series`` is a ``series.Series``. Episodes with no recognisable code are
         skipped; a target name already taken is reported as a conflict.
@@ -1044,7 +1485,7 @@ class FileManager:
                 continue
             dest_dir = series.folder / season_folder_name(ep.season)
             new_path = dest_dir / episode_filename(
-                ep.season, ep.episode, ep.path.stem, ep.path.suffix)
+                ep.season, ep.episode, series.title, ep.path.suffix)
             if new_path == ep.path:
                 continue
             if new_path.exists():
@@ -1052,14 +1493,64 @@ class FileManager:
                 continue
             try:
                 dest_dir.mkdir(parents=True, exist_ok=True)
-                old_name = ep.path.name
+                old_path = ep.path
-                ep.path.rename(new_path)
+                old_path.rename(new_path)
+                subtitles.rename_subtitles_with(old_path, new_path)
                 ep.path = new_path
-                renamed.append((old_name, new_path.name))
+                renamed.append((old_path.name, new_path.name))
             except OSError as exc:
                 conflicts.append((ep.path.name, str(exc)))
         return {"renamed": renamed, "skipped": skipped, "conflicts": conflicts}
 
+    def rename_all_series_to_canonical(
+        self,
+        on_progress: Callable[[int, int, str], None] | None = None,
+        should_cancel: Callable[[], bool] | None = None,
+    ) -> dict:
+        """Canonicalise every series' episode filenames across the pool.
+
+        Iterates all series (``series`` + ``mixed`` libraries); per series it
+        renames each episode to ``SxxEyy - {series title}.ext`` in the right
+        ``Season NN`` / ``Specials`` folder (:meth:`rename_episodes_to_canonical`)
+        and then removes any season folder left empty by the moves. Episodes with
+        no recognisable ``SxxEyy`` are left in place and listed.
+
+        Returns ``{series, renamed:[(series, old, new)],
+        skipped_no_code:[(series, name)], conflicts:[(series, name, msg)],
+        empty_dirs_removed:[str], cancelled}``.
+        """
+        from .series import is_season_folder
+        pool = self.pool_dir
+        if pool is None:
+            raise RuntimeError("Pool není nastaven.")
+        all_series = self.load_series()
+        total = len(all_series)
+        renamed: list[tuple[str, str, str]] = []
+        skipped: list[tuple[str, str]] = []
+        conflicts: list[tuple[str, str, str]] = []
+        empty_removed: list[str] = []
+        cancelled = False
+        for i, ser in enumerate(all_series, 1):
+            if should_cancel is not None and should_cancel():
+                cancelled = True
+                break
+            if on_progress is not None:
+                on_progress(i, total, ser.title)
+            res = self.rename_episodes_to_canonical(ser)
+            renamed += [(ser.title, old, new) for old, new in res["renamed"]]
+            skipped += [(ser.title, name) for name in res["skipped"]]
+            conflicts += [(ser.title, name, msg) for name, msg in res["conflicts"]]
+            for sub in sorted(p for p in ser.folder.iterdir() if p.is_dir()):
+                if is_season_folder(sub.name) and not any(sub.iterdir()):
+                    try:
+                        sub.rmdir()
+                        empty_removed.append(str(sub.relative_to(pool)))
+                    except OSError:
+                        pass
+        return {"series": total, "renamed": renamed, "skipped_no_code": skipped,
+                "conflicts": conflicts, "empty_dirs_removed": empty_removed,
+                "cancelled": cancelled}
+
     def apply_series_edits(
         self, series, *, title: str, year: int | str | None = None,
         tmdb_id: int | str | None = None, library: str | None = None,
@@ -1096,6 +1587,27 @@ class FileManager:
                   else {"renamed": [], "skipped": [], "conflicts": []})
         return {"folder": new_folder, "episodes": result}
 
+    def remove_series(self, series) -> None:
+        """Delete a whole series folder from the pool (every season and episode).
+
+        Series carry no index metadata (they are scanned from disk), so removing
+        one is just deleting its folder. Refuses a folder that is not inside the
+        pool as a safety check.
+
+        Raises:
+            ValueError: the series folder is outside the pool.
+        """
+        pool = self.pool_dir
+        if pool is None:
+            raise RuntimeError("Pool není nastaven.")
+        folder = Path(series.folder)
+        try:
+            folder.resolve().relative_to(pool.resolve())
+        except ValueError:
+            raise ValueError(f"Složka „{folder}“ není v poolu.")
+        if folder.is_dir():
+            shutil.rmtree(folder)
+
     def assign_tag_to_file_objects(self, files_objs: list[File], tag):
         """Přiřadí tag (Tag nebo 'category/name' string) ke každému souboru v seznamu."""
         for f in files_objs:

src/core/hardlink_manager.py

@@ -19,6 +19,7 @@ Example:
 """
 import os
 import random
+import shutil
 from collections import defaultdict
 from pathlib import Path
 from typing import List, Tuple, Optional, Dict, Set
@@ -341,6 +342,26 @@ class HardlinkManager:
 
         return success_count, fail_count
 
+    def remove_mirror(self, name: str) -> bool:
+        """Remove ``output_dir/name`` entirely (file or folder tree).
+
+        Used to drop a whole mirrored library (or one entry of the shared
+        mixed-library-series bucket) when it falls out of the miniDLNA
+        generation's scope. Mirrors are pure hardlinks, so deleting the folder
+        loses nothing — it's fully regenerable from the pool. ``name`` may
+        contain "/" to address one entry inside a bucket folder.
+
+        Returns whether anything was actually removed.
+        """
+        target = self.output_dir / name
+        if not target.exists():
+            return False
+        if target.is_dir():
+            shutil.rmtree(target)
+        else:
+            target.unlink()
+        return True
+
     def _fill_special_folder(
         self, chosen: List[File], subfolder: str, dry_run: bool
     ) -> Tuple[int, int]:

src/core/legacy_meta.py

@@ -0,0 +1,106 @@
+"""Readers for Curator's *pre-index* metadata layouts.
+
+Before the unified pool index (`.Curator.!index`), Tagger / early Curator stored
+a movie's metadata in a **per-file sidecar** ``.{filename}.!tag`` (JSON) sitting
+next to the video. When importing a file that came from such a pool we can
+recover its **ČSFD link** (and title / year) from that sidecar — or from an old
+``.Curator.!index`` found by walking up from the file.
+
+This is read-only recovery for the import dialog; nothing here writes.
+"""
+from __future__ import annotations
+
+import json
+from dataclasses import dataclass
+from pathlib import Path, PurePosixPath
+from typing import Optional
+
+from .pool_index import INDEX_FILENAME
+
+SIDECAR_SUFFIX = ".!tag"
+_MAX_INDEX_WALK_UP = 4
+
+
+@dataclass
+class LegacyMeta:
+    """What an old sidecar / index record can still tell us about a movie."""
+
+    csfd_url: Optional[str] = None
+    title: Optional[str] = None
+    year: Optional[str] = None       # four-digit string
+    source: str = ""                 # "sidecar" | "index"
+
+
+def _record_to_meta(record: object, source: str) -> Optional[LegacyMeta]:
+    """Pull the useful fields out of a stored movie record (any schema version)."""
+    if not isinstance(record, dict):
+        return None
+    csfd = record.get("csfd_url") or record.get("csfd_link")  # new | Tagger-era key
+    title = record.get("title") or None
+    meta_raw = record.get("meta")
+    meta = meta_raw if isinstance(meta_raw, dict) else {}
+    cache_raw = record.get("csfd_cache")
+    cache = cache_raw if isinstance(cache_raw, dict) else {}
+    raw_year = meta.get("year") or cache.get("year")
+    year = str(raw_year).strip() if raw_year is not None and str(raw_year).strip().isdigit() else None
+    if not (csfd or title or year):
+        return None
+    return LegacyMeta(csfd_url=csfd or None, title=title, year=year, source=source)
+
+
+def _from_sidecar(video_path: Path) -> Optional[LegacyMeta]:
+    sidecar = video_path.parent / f".{video_path.name}{SIDECAR_SUFFIX}"
+    if not sidecar.is_file():
+        return None
+    try:
+        record = json.loads(sidecar.read_text(encoding="utf-8"))
+    except (json.JSONDecodeError, OSError, ValueError):
+        return None
+    return _record_to_meta(record, "sidecar")
+
+
+def _lookup_in_index(movies: dict, video_path: Path, index_dir: Path) -> Optional[dict]:
+    """Find the record for ``video_path`` in an index's ``movies`` map.
+
+    Tries the exact pool-relative key first, then falls back to a unique
+    basename match (the file may have moved since the index was written).
+    """
+    try:
+        rel = video_path.relative_to(index_dir).as_posix()
+        if rel in movies:
+            return movies[rel]
+    except ValueError:
+        pass
+    name = video_path.name
+    matches = [v for k, v in movies.items() if PurePosixPath(k).name == name]
+    return matches[0] if len(matches) == 1 else None
+
+
+def _from_legacy_index(video_path: Path) -> Optional[LegacyMeta]:
+    directory = video_path.parent
+    for _ in range(_MAX_INDEX_WALK_UP + 1):
+        index_path = directory / INDEX_FILENAME
+        if index_path.is_file():
+            try:
+                data = json.loads(index_path.read_text(encoding="utf-8"))
+            except (json.JSONDecodeError, OSError, ValueError):
+                return None
+            movies = data.get("movies", data) if isinstance(data, dict) else None
+            if not isinstance(movies, dict):
+                return None
+            record = _lookup_in_index(movies, video_path, directory)
+            return _record_to_meta(record, "index") if record is not None else None
+        if directory.parent == directory:
+            break
+        directory = directory.parent
+    return None
+
+
+def read_legacy_meta(video_path: Path) -> Optional[LegacyMeta]:
+    """Recover ČSFD link / title / year from a pre-index layout, or ``None``.
+
+    Order: a per-file ``.{name}.!tag`` sidecar next to the video, then a
+    ``.Curator.!index`` found walking up (max 4 levels) from the file.
+    """
+    video_path = Path(video_path)
+    return _from_sidecar(video_path) or _from_legacy_index(video_path)

src/core/migrate.py

@@ -27,6 +27,7 @@ class MatchProposal:
     chosen: object = None   # tmdb.TmdbResult preselected for the user, or None
     candidates: list = field(default_factory=list)  # list[tmdb.TmdbResult]
     error: str = ""
+    note: str = ""          # e.g. "přes ČSFD: The Shawshank Redemption (1994)"
 
 
 def normalize(text: str) -> str:

src/core/movie.py

@@ -0,0 +1,251 @@
+"""The movie object — metadata first, files second.
+
+A movie is identified by ``(title, year, tmdb_id)`` and owns **its files**, not
+the other way round. That inversion is the point: the pool index used to key a
+record by a file path, so metadata was a passenger on one particular file — and
+everything about multi-version movies got awkward (which file "holds" the tags,
+why renaming a grouped movie had to be blocked, why an import could silently
+create a duplicate instead of a version).
+
+Here the record is the movie; each playable file is a :class:`MediaFile` under
+it, told apart by a free-text ``label`` (``3D HSBS``, ``4K``, ``Director's
+Cut``, …). Where those files *live* is then a pure function of the record —
+:meth:`Movie.desired_layout` — so promoting to a folder, demoting back, or
+renaming the whole thing are all the same operation: recompute and move what
+doesn't match.
+
+Layout (Jellyfin's own conventions — https://jellyfin.org/docs/general/server/media/movies/)::
+
+    one video          <Library>/Title (rok) [tmdbid-N].ext
+    two or more        <Library>/Title (rok) [tmdbid-N]/
+                           Title (rok) [tmdbid-N] - Výchozí.ext
+                           Title (rok) [tmdbid-N].3D.HSBS.ext
+
+Every file in a movie folder must start with the folder's exact name; both
+``" - label"`` and ``".3D.FMT"`` are valid separators, so a 3D file keeps the
+documented ``.3D.<FORMAT>`` spelling whether it sits flat or grouped.
+Subtitles are not media entries — they ride along with their video by filename
+stem (see :mod:`src.core.subtitles`).
+"""
+from __future__ import annotations
+
+import re
+import unicodedata
+from dataclasses import dataclass, field
+from pathlib import Path
+from typing import Optional
+
+from .naming import THREE_D_FORMATS, canonical_pool_stem, is_valid_year
+
+# Roles a media file can have. Only playable video for now — artwork stays
+# Jellyfin's job (it writes poster/fanart into the folder itself).
+ROLE_VIDEO = "video"
+
+# A grouped movie needs a label on every file (all of Jellyfin's documented
+# examples label every version); this is what an unlabelled one gets.
+DEFAULT_VERSION_LABEL = "Výchozí"
+
+# "HSBS" / "hsbs" / "3D HSBS" / "3d.hsbs" / "3D_HSBS" → "HSBS"
+_LABEL_3D_RE = re.compile(
+    rf"^(?:3d[\s._-]*)?({'|'.join(THREE_D_FORMATS)})$", re.IGNORECASE)
+
+
+def normalize_3d_label(label: object) -> Optional[str]:
+    """The 3D format a version label denotes (upper-case), or ``None``.
+
+    Lets a plain label double as the 3D marker — ``"3D HSBS"`` typed in the
+    version dialog and ``"hsbs"`` picked from a dropdown mean the same thing.
+    """
+    match = _LABEL_3D_RE.match(str(label or "").strip())
+    return match.group(1).upper() if match else None
+
+
+def media_filename(stem: str, label: str, ext: str, *, grouped: bool) -> str:
+    """Filename for one media file of a movie whose canonical stem is ``stem``.
+
+    - no label → ``stem.ext`` (a lone, plain video)
+    - 3D label → ``stem.3D.<FORMAT>.ext`` (Jellyfin's documented 3D form)
+    - anything else → ``stem - label.ext``
+
+    ``grouped`` only decides whether an empty label is allowed: inside a movie
+    folder every file gets one, so it falls back to :data:`DEFAULT_VERSION_LABEL`.
+    """
+    label = (label or "").strip()
+    if grouped and not label:
+        label = DEFAULT_VERSION_LABEL
+    if not label:
+        return f"{stem}{ext}"
+    fmt = normalize_3d_label(label)
+    if fmt:
+        return f"{stem}.3D.{fmt}{ext}"
+    return f"{stem} - {label}{ext}"
+
+
+def identity_key(tmdb_id: object = None, title: str = "", year: object = None) -> str:
+    """The pool-index key for a movie — ``tmdb-<id>``, else a title/year slug.
+
+    Keying by identity (rather than by file path) is what lets a second file of
+    the same film find its movie instead of becoming a separate entry.
+    """
+    id_s = str(tmdb_id).strip() if tmdb_id is not None else ""
+    if id_s.isdigit():
+        return f"tmdb-{int(id_s)}"
+    raw = f"{(title or '').strip()} {str(year or '').strip()}".strip().lower()
+    # Fold diacritics so "Pelíšky" and "Pelisky" can't become two movies.
+    raw = "".join(c for c in unicodedata.normalize("NFD", raw)
+                  if not unicodedata.combining(c))
+    slug = re.sub(r"[^0-9a-z]+", "-", raw).strip("-")
+    return f"name-{slug or 'bez-nazvu'}"
+
+
+@dataclass
+class MediaFile:
+    """One file belonging to a movie (today always a playable video)."""
+
+    path: Path
+    label: str = ""
+    role: str = ROLE_VIDEO
+
+    @property
+    def format_3d(self) -> Optional[str]:
+        """The 3D format this version's label denotes, if any."""
+        return normalize_3d_label(self.label)
+
+    def to_record(self, pool_dir: Path) -> dict:
+        """Serialise for the pool index (path stored pool-relative, POSIX)."""
+        try:
+            rel = Path(self.path).relative_to(pool_dir).as_posix()
+        except ValueError:
+            rel = Path(self.path).as_posix()
+        return {"role": self.role, "label": self.label, "file": rel}
+
+    @classmethod
+    def from_record(cls, data: dict, pool_dir: Path) -> "MediaFile":
+        return cls(
+            path=pool_dir / str(data.get("file", "")),
+            label=str(data.get("label", "") or ""),
+            role=str(data.get("role") or ROLE_VIDEO),
+        )
+
+
+@dataclass
+class Movie:
+    """A film in the pool: its identity, its metadata, and its media files."""
+
+    key: str
+    title: str = ""
+    year: Optional[str] = None
+    tmdb_id: Optional[int] = None
+    library: str = ""
+    media: list[MediaFile] = field(default_factory=list)
+
+    # --- metadata that used to live on the "primary" File ---
+    tags: list = field(default_factory=list)
+    auto_tag_paths: set[str] = field(default_factory=set)
+    csfd_url: Optional[str] = None
+    date: Optional[str] = None
+    added: Optional[str] = None
+    attributes: dict[str, str] = field(default_factory=dict)
+    meta: Optional[dict] = None
+
+    # ------------------------------------------------------------------
+    # Identity / shape
+    # ------------------------------------------------------------------
+
+    @property
+    def videos(self) -> list[MediaFile]:
+        """Playable versions, in a stable order (labelled ones by label)."""
+        return sorted(
+            (m for m in self.media if m.role == ROLE_VIDEO),
+            key=lambda m: m.label.casefold())
+
+    @property
+    def is_grouped(self) -> bool:
+        """True when the movie needs its own folder (more than one version)."""
+        return len(self.videos) > 1
+
+    @property
+    def stem(self) -> str:
+        """Canonical ``Title (rok) [tmdbid-N]`` — the folder / filename base.
+
+        Falls back to the bare title when no four-digit year is known (a movie
+        can be imported without one).
+        """
+        title = (self.title or "").replace("/", "-").replace("\\", "-").strip()
+        if not title:
+            title = self.key
+        if is_valid_year(self.year or ""):
+            return canonical_pool_stem(title, self.year, self.tmdb_id)
+        return title
+
+    @property
+    def primary(self) -> Optional[MediaFile]:
+        """The version that represents the movie (first by :attr:`videos`)."""
+        videos = self.videos
+        return videos[0] if videos else None
+
+    def desired_layout(self, pool_dir: Path) -> list[tuple[MediaFile, Path]]:
+        """``(media, where it belongs)`` for every file, from the record alone.
+
+        The whole flat-vs-folder rule lives here: one video sits directly in
+        the library, two or more move into ``<Library>/<stem>/``. Callers move
+        whatever doesn't already match — which makes promotion, demotion and
+        renaming the same operation.
+        """
+        base = Path(pool_dir) / self.library
+        grouped = self.is_grouped
+        folder = base / self.stem if grouped else base
+        return [
+            (m, folder / media_filename(
+                self.stem, m.label, Path(m.path).suffix, grouped=grouped))
+            for m in self.videos
+        ]
+
+    # ------------------------------------------------------------------
+    # Index serialisation
+    # ------------------------------------------------------------------
+
+    def to_record(self, pool_dir: Path) -> dict:
+        data = {
+            "title": self.title,
+            "year": self.year,
+            "tmdb_id": self.tmdb_id,
+            "library": self.library,
+            "media": [m.to_record(pool_dir) for m in self.media],
+            "tags": [getattr(t, "full_path", t) for t in self.tags],
+            "auto_tags": sorted(self.auto_tag_paths),
+            "csfd_url": self.csfd_url,
+            "date": self.date,
+            "added": self.added,
+            "attributes": dict(self.attributes),
+        }
+        if self.meta is not None:
+            data["meta"] = dict(self.meta)
+        return data
+
+    @classmethod
+    def from_record(
+        cls, key: str, data: dict, pool_dir: Path, tagmanager=None
+    ) -> "Movie":
+        movie = cls(
+            key=key,
+            title=str(data.get("title") or ""),
+            year=(str(data["year"]) if data.get("year") else None),
+            tmdb_id=(int(data["tmdb_id"]) if str(data.get("tmdb_id") or "").isdigit()
+                     else None),
+            library=str(data.get("library") or ""),
+            media=[MediaFile.from_record(m, pool_dir)
+                   for m in (data.get("media") or [])],
+            auto_tag_paths=set(data.get("auto_tags") or []),
+            csfd_url=data.get("csfd_url") or None,
+            date=data.get("date") or None,
+            added=data.get("added") or None,
+            attributes=dict(data.get("attributes") or {}),
+            meta=(dict(data["meta"]) if data.get("meta") else None),
+        )
+        if tagmanager is not None:
+            for full_path in data.get("tags") or []:
+                if "/" in str(full_path):
+                    category, name = str(full_path).split("/", 1)
+                    movie.tags.append(tagmanager.add_tag(category, name))
+        return movie

src/core/naming.py

@@ -4,16 +4,32 @@ Every movie in the pool is named ``Title (YYYY) [tmdbid-N].ext`` — a title, a
 four-digit year in parentheses, and (when known) the TMDb id in brackets, which
 is exactly the form Jellyfin matches on. The ``[tmdbid-N]`` part is optional: a
 plain ``Title (YYYY)`` is still valid (Jellyfin then matches by name). The year
-lets two same-named films coexist and makes the filename self-describing. These
+lets two same-named films coexist and makes the filename self-describing.
-helpers build, validate and parse the stem (the filename without its extension).
+
+A 3D movie additionally carries a ``.3D.<FORMAT>`` tag right before the
+extension (Jellyfin's own convention — https://jellyfin.org/docs/general/server/media/movies/):
+``Title (YYYY) [tmdbid-N].3D.HSBS.ext``. ``FORMAT`` is one of
+:data:`THREE_D_FORMATS`; Jellyfin reads it case-insensitively but Curator always
+writes it upper-case for a single canonical form.
+
+These helpers build, validate and parse the stem (the filename without its
+extension).
 """
 import re
 
-# A trailing four-digit year in parentheses, then an optional ``[tmdbid-N]``. The
+# Jellyfin's recognised 3D format tags (case-insensitive on read; Curator
-# title is non-greedy so a title that itself contains parentheses keeps them:
+# always writes upper-case). hsbs/fsbs = half/full side-by-side, htab/ftab =
-# "Kurz (special) (2019)" → title "Kurz (special)", year 2019.
+# half/full top-and-bottom, mvc = Multiview Video Coding.
+THREE_D_FORMATS = ("HSBS", "FSBS", "HTAB", "FTAB", "MVC")
+
+# A trailing four-digit year in parentheses, then an optional ``[tmdbid-N]`` and
+# an optional ``.3D.<FORMAT>`` tag. The title is non-greedy so a title that
+# itself contains parentheses keeps them: "Kurz (special) (2019)" → title
+# "Kurz (special)", year 2019.
 _POOL_STEM_RE = re.compile(
-    r"^(?P<title>.+?) \((?P<year>\d{4})\)(?: \[tmdbid-(?P<id>\d+)\])?$")
+    r"^(?P<title>.+?) \((?P<year>\d{4})\)(?: \[tmdbid-(?P<id>\d+)\])?"
+    r"(?:\.3D\.(?P<format3d>hsbs|fsbs|htab|ftab|mvc))?$",
+    re.IGNORECASE)
 
 
 def is_valid_year(year: object) -> bool:
@@ -21,12 +37,16 @@ def is_valid_year(year: object) -> bool:
     return bool(re.fullmatch(r"\d{4}", str(year).strip()))
 
 
-def canonical_pool_stem(title: str, year: object, tmdb_id: object = None) -> str:
+def canonical_pool_stem(
-    """Build the canonical pool stem ``Title (YYYY)`` (+ `` [tmdbid-N]`` if given).
+    title: str, year: object, tmdb_id: object = None, format_3d: object = None,
+) -> str:
+    """Build the canonical pool stem ``Title (YYYY)`` (+ `` [tmdbid-N]`` /
+    ``.3D.<FORMAT>`` if given).
 
     Raises:
-        ValueError: the title is empty, the year is not four digits, or a given
+        ValueError: the title is empty, the year is not four digits, a given
-            ``tmdb_id`` is not a positive integer.
+            ``tmdb_id`` is not a positive integer, or ``format_3d`` isn't one
+            of :data:`THREE_D_FORMATS`.
     """
     title = (title or "").strip()
     year_s = str(year).strip()
@@ -40,6 +60,13 @@ def canonical_pool_stem(title: str, year: object, tmdb_id: object = None) -> str
         if not id_s.isdigit():
             raise ValueError(f"TMDb ID musí být číslo, ne „{tmdb_id}“.")
         stem += f" [tmdbid-{id_s}]"
+    if format_3d is not None and str(format_3d).strip() != "":
+        fmt = str(format_3d).strip().upper()
+        if fmt not in THREE_D_FORMATS:
+            raise ValueError(
+                f"3D formát musí být jedno z {', '.join(THREE_D_FORMATS)}, "
+                f"ne „{format_3d}“.")
+        stem += f".3D.{fmt}"
     return stem
 
 
@@ -63,6 +90,15 @@ def parse_tmdb_id(stem: str) -> int | None:
     return int(match.group("id"))
 
 
+def parse_3d_format(stem: str) -> str | None:
+    """Read the ``.3D.<FORMAT>`` tag from a canonical stem (upper-cased), or
+    ``None`` if absent."""
+    match = _POOL_STEM_RE.match((stem or "").strip())
+    if not match or not match.group("format3d"):
+        return None
+    return match.group("format3d").upper()
+
+
 def is_canonical_pool_stem(stem: str) -> bool:
     """True when ``stem`` matches the ``Title (YYYY)`` convention."""
     return _POOL_STEM_RE.match((stem or "").strip()) is not None

src/core/nfo.py

@@ -26,6 +26,7 @@ class NfoData:
     countries: list[str] = field(default_factory=list)
     rating: Optional[int] = None     # 0–100 (NFO 0–10 scaled up), or None
     tmdb_id: Optional[int] = None
+    csfd_url: Optional[str] = None    # ČSFD film URL, if the NFO carries a csfd id
 
     def field_values(self, name: str) -> list[str]:
         """Values for a tag-schema source field (genres/countries/year/rating)."""
@@ -78,6 +79,29 @@ def _parse_tmdb_id(root: ET.Element) -> Optional[int]:
     return int(raw.strip()) if raw and raw.strip().isdigit() else None
 
 
+def _parse_csfd_url(root: ET.Element) -> Optional[str]:
+    """A ČSFD film URL from the NFO, if any.
+
+    Czech Kodi scrapers record ČSFD as ``<uniqueid type="csfd">`` (a bare id or a
+    full URL) or a legacy ``<csfdid>`` / ``<csfd>`` element. A bare id is expanded
+    to ``https://www.csfd.cz/film/<id>/``.
+    """
+    candidates: list[str] = []
+    for uid in root.findall("uniqueid"):
+        if uid.get("type") == "csfd" and uid.text and uid.text.strip():
+            candidates.append(uid.text.strip())
+    for tag in ("csfdid", "csfd"):
+        raw = root.findtext(tag)
+        if raw and raw.strip():
+            candidates.append(raw.strip())
+    for value in candidates:
+        if value.isdigit():
+            return f"https://www.csfd.cz/film/{value}/"
+        if "csfd.cz" in value:
+            return value if value.startswith("http") else f"https://{value.lstrip('/')}"
+    return None
+
+
 def read_nfo(video_path: Path) -> Optional[NfoData]:
     """Read the movie's ``.nfo`` into :class:`NfoData`, or None if absent/broken."""
     path = find_nfo(video_path)
@@ -98,4 +122,5 @@ def read_nfo(video_path: Path) -> Optional[NfoData]:
         countries=_texts(root, "country"),
         rating=_parse_rating(root),
         tmdb_id=_parse_tmdb_id(root),
+        csfd_url=_parse_csfd_url(root),
     )

src/core/pool_index.py

@@ -10,17 +10,26 @@ The index also carries **library-level settings** (``tag_schema``,
 particular pool travels with the pool. The global config keeps only app data
 (window state, MRU) and the pointers to where the pool/output live.
 
-On-disk shape::
+On-disk shape (**v2**)::
 
-    {"settings": {...}, "movies": {"Filmy/Matrix.mkv": {...}, ...}}
+    {"version": 2,
+     "settings": {...},
+     "movies": {"tmdb-603": {"title": …, "media": [{"role", "label", "file"}, …]}}}
 
-Records are keyed by the file's path relative to the pool root (POSIX form),
+Records are keyed by the movie's **identity** (``tmdb-<id>``, or a title/year
-e.g. ``"Filmy/Matrix.mkv"`` — stable and portable across machines.
+slug when there's no id) and own their files — see :mod:`src.core.movie`. The
+original **v1** shape keyed a record by one file's pool-relative path, which
+made metadata a passenger on that file; :meth:`PoolIndex.load` migrates such an
+index in place (backing the old file up first). Migration only rewrites
+metadata — no file on disk is moved, because a one-video movie is already in
+its v2 position.
 """
 import json
+import shutil
 from pathlib import Path
 
 INDEX_FILENAME = ".Curator.!index"
+INDEX_VERSION = 2
 
 
 class PoolIndex:
@@ -42,7 +51,11 @@ class PoolIndex:
             return path.as_posix()
 
     def load(self) -> None:
-        """Load the index from disk (missing/corrupt index = empty)."""
+        """Load the index from disk (missing/corrupt index = empty).
+
+        A v1 (path-keyed) index is migrated to v2 in place — the old file is
+        copied to ``.Curator.!index.v1.bak`` first.
+        """
         if not self.index_path.exists():
             self.records = {}
             self.settings = {}
@@ -55,13 +68,82 @@ class PoolIndex:
         except (json.JSONDecodeError, OSError):
             self.records = {}
             self.settings = {}
+            return
+
+        if int(data.get("version", 1)) < INDEX_VERSION:
+            self._migrate_v1_to_v2()
+
+    def _migrate_v1_to_v2(self) -> None:
+        """Re-key path-keyed records into identity-keyed movie records.
+
+        Each v1 record described one file; several of them can describe one
+        movie (the interim multi-version layout put them in a shared folder),
+        so they are merged by identity. Metadata only — nothing is moved on
+        disk, since a v1 movie's files already sit where v2 wants them.
+        """
+        from .movie import ROLE_VIDEO, identity_key
+        from .naming import is_canonical_pool_stem, parse_pool_stem, parse_tmdb_id
+
+        migrated: dict[str, dict] = {}
+        for rel_path, record in self.records.items():
+            if not isinstance(record, dict) or "media" in record:
+                continue  # already v2-shaped, leave it alone
+            path = Path(rel_path)
+            parts = path.parts
+            library = parts[0] if len(parts) > 1 else ""
+            # A file inside its own "Title (rok) [tmdbid]" folder is one
+            # version of that movie; its own stem carries the " - label".
+            parent = path.parent.name
+            grouped = len(parts) > 2 and is_canonical_pool_stem(parent)
+            identity_stem = parent if grouped else path.stem
+
+            parsed = parse_pool_stem(identity_stem)
+            title = record.get("title") or (parsed[0] if parsed else path.stem)
+            year = str(parsed[1]) if parsed else None
+            tmdb_id = parse_tmdb_id(identity_stem)
+            label = ""
+            if grouped and path.stem.startswith(f"{parent} - "):
+                label = path.stem[len(parent) + 3:]
+            elif grouped:
+                label = path.stem[len(parent):].lstrip(". -") or ""
+
+            key = identity_key(tmdb_id, title, year)
+            entry = {"role": ROLE_VIDEO, "label": label, "file": rel_path}
+            if key in migrated:
+                migrated[key]["media"].append(entry)
+                continue
+            migrated[key] = {
+                "title": title,
+                "year": year,
+                "tmdb_id": tmdb_id,
+                "library": library,
+                "media": [entry],
+                "tags": record.get("tags", []),
+                "auto_tags": record.get("auto_tags", record.get("csfd_tags", [])),
+                "csfd_url": record.get("csfd_url") or record.get("csfd_link"),
+                "date": record.get("date"),
+                "added": record.get("added"),
+                "attributes": record.get("attributes", {}),
+            }
+            if record.get("meta"):
+                migrated[key]["meta"] = record["meta"]
+
+        try:
+            shutil.copy2(self.index_path,
+                         self.index_path.with_name(self.index_path.name + ".v1.bak"))
+        except OSError:
+            pass
+        self.records = migrated
+        self.save()
 
     def save(self) -> None:
         """Persist the index to disk."""
         self.pool_dir.mkdir(parents=True, exist_ok=True)
         with open(self.index_path, "w", encoding="utf-8") as f:
             json.dump(
-                {"settings": self.settings, "movies": self.records},
+                {"version": INDEX_VERSION,
+                 "settings": self.settings,
+                 "movies": self.records},
                 f, indent=2, ensure_ascii=False,
             )
 
@@ -74,16 +156,49 @@ class PoolIndex:
         self.settings[key] = value
         self.save()
 
-    def get(self, file_path: Path) -> dict | None:
+    # ------------------------------------------------------------------
-        """Return the record for a file, or None if it is not indexed."""
+    # Movie records (v2 — keyed by identity, own their media files)
-        return self.records.get(self._key(file_path))
+    # ------------------------------------------------------------------
 
-    def set(self, file_path: Path, data: dict) -> None:
+    def get_movie(self, key: str) -> dict | None:
-        """Upsert a record and persist the index."""
+        """Return the movie record under ``key``, or None."""
-        self.records[self._key(file_path)] = data
+        return self.records.get(key)
+
+    def set_movie(self, key: str, data: dict) -> None:
+        """Upsert a movie record and persist the index."""
+        self.records[key] = data
         self.save()
 
-    def delete(self, file_path: Path) -> None:
+    def delete_movie(self, key: str) -> None:
-        """Remove a record (if present) and persist the index."""
+        """Remove a movie record (if present) and persist the index."""
-        if self.records.pop(self._key(file_path), None) is not None:
+        if self.records.pop(key, None) is not None:
             self.save()
+
+    def rekey_movie(self, old_key: str, new_key: str) -> None:
+        """Move a record to a new identity key (e.g. its TMDb id was set/fixed)."""
+        if old_key == new_key or old_key not in self.records:
+            return
+        self.records[new_key] = self.records.pop(old_key)
+        self.save()
+
+    def all_movies(self) -> dict[str, dict]:
+        """Every movie record, keyed by identity."""
+        return dict(self.records)
+
+    def record_for(self, file_path: Path) -> dict | None:
+        """The movie record that owns ``file_path``, or None if untracked."""
+        found = self.find_movie_by_media(file_path)
+        return found[1] if found is not None else None
+
+    def find_movie_by_media(self, file_path: Path) -> tuple[str, dict] | None:
+        """``(key, record)`` of the movie owning ``file_path``, or None.
+
+        The reverse lookup a file needs now that records are keyed by identity
+        rather than by path.
+        """
+        rel = self._key(file_path)
+        for key, record in self.records.items():
+            for media in record.get("media", []):
+                if media.get("file") == rel:
+                    return key, record
+        return None

src/core/series.py

@@ -71,31 +71,52 @@ def parse_episode(name: str) -> Optional[tuple[int, int]]:
     return int(match.group(3)), int(match.group(4))
 
 
+def collect_episode_files(folder: Path) -> list[Path]:
+    """Every video file under ``folder`` (recursively), sidecars excluded, sorted.
+
+    Lets the episode-import dialog take a whole ``Series/Season NN/`` tree (or any
+    nested layout) in one pick instead of file-by-file. Season/episode numbers
+    are still read per file from its name by :func:`parse_episode`.
+    """
+    folder = Path(folder)
+    if not folder.is_dir():
+        return []
+    return sorted(
+        f for f in folder.rglob("*")
+        if f.is_file() and f.suffix.lower() not in _SIDECARS
+    )
+
+
 def season_folder_name(season: int) -> str:
     """Folder name for a season — ``Specials`` for 0, else ``Season NN``."""
     return "Specials" if season == 0 else f"Season {season:02d}"
 
 
-def episode_body(stem: str) -> str:
+def is_season_folder(name: str) -> bool:
-    """The descriptive part of an episode filename, minus a leading ``SxxEyy`` code.
+    """True for a season folder name — ``Specials`` or ``Season <n>`` (any padding)."""
-
+    return name == "Specials" or re.fullmatch(r"Season \d{1,3}", name) is not None
-    Keeps the original (release) filename so it survives into the canonical name,
-    while stripping an already-applied ``SxxEyy - `` prefix so repeated renames
-    don't double it. Returns ``""`` when the stem was only the code.
-    """
-    s = _EPISODE_RE.sub("", stem, count=1)          # drop the SxxEyy/NxNN token
-    s = re.sub(r"([\s._-])[\s._-]+", r"\1", s)       # collapse separator runs
-    return s.strip(" ._-")
 
 
-def episode_filename(season: int, episode: int, orig_stem: str, ext: str) -> str:
+# Characters not allowed in a filename on the common filesystems.
-    """Canonical episode filename ``SxxEyy - {original name}.ext``.
+_FS_UNSAFE = re.compile(r'[<>:"/\\|?*\x00-\x1f]')
 
-    Keeps the original filename after the code; when the original was only the
+
-    code (nothing descriptive left) it collapses to ``SxxEyy.ext``.
+def sanitize_title(title: str) -> str:
+    """A series/episode title made safe to sit in a filename (spaces collapsed)."""
+    cleaned = _FS_UNSAFE.sub("", title or "")
+    return re.sub(r"\s+", " ", cleaned).strip(" .")
+
+
+def episode_filename(season: int, episode: int, series_title: str, ext: str) -> str:
+    """Canonical episode filename ``SxxEyy - {series title}.ext``.
+
+    The release string is deliberately **not** kept — identity is the ``SxxEyy``
+    code, and Jellyfin fetches the episode title/metadata from TMDb (matched by
+    the code + the series folder's ``[tmdbid-N]``). An empty title collapses to
+    ``SxxEyy.ext``.
     """
     code = f"S{season:02d}E{episode:02d}"
-    body = episode_body(orig_stem)
+    body = sanitize_title(series_title)
     return f"{code} - {body}{ext}" if body else f"{code}{ext}"
 
 
@@ -115,13 +136,13 @@ def series_folder_stem(title: str, year: object = None, tmdb_id: object = None)
     return f"{title} [tmdbid-{id_s}]" if id_s.isdigit() else title
 
 
-def is_canonical_episode(path: Path) -> bool:
+def is_canonical_episode(path: Path, series_title: str) -> bool:
-    """True when ``path`` already follows ``SxxEyy - name`` in the right season."""
+    """True when ``path`` is already ``SxxEyy - {series title}.ext`` in its season."""
     parsed = parse_episode(path.name)
     if parsed is None:
         return False
     season, episode = parsed
-    expected = episode_filename(season, episode, path.stem, path.suffix)
+    expected = episode_filename(season, episode, series_title, path.suffix)
     if path.name != expected:
         return False
     return path.parent.name == season_folder_name(season)

src/core/subtitles.py

@@ -0,0 +1,150 @@
+"""External subtitle sidecars — attach, discover, keep in sync on rename.
+
+Curator does not mux/embed subtitles. Jellyfin plays an **external** subtitle
+file natively as long as it shares the video's filename stem, with an optional
+language code and flag suffix::
+
+    Title (rok) [tmdbid-N].mkv
+    Title (rok) [tmdbid-N].cs.srt          # language
+    Title (rok) [tmdbid-N].cs.forced.srt   # + a flag (forced / sdh / default)
+
+Subtitle presence is a **filesystem fact**, like NFO — nothing is cached in the
+pool index. What Curator does own: copying a picked file into place with the
+right name (:func:`attach_subtitle`), and moving a subtitle along whenever its
+video gets renamed so it never silently detaches (:func:`rename_subtitles_with`).
+"""
+from __future__ import annotations
+
+import re
+import shutil
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Optional
+
+SUBTITLE_EXTENSIONS = {".srt", ".ass", ".ssa", ".sub", ".vtt"}
+_FLAGS = {"forced", "sdh", "default"}
+_LANG_RE = re.compile(r"[a-z]{2,3}")
+
+
+@dataclass
+class SubtitleFile:
+    """One subtitle sidecar found next to a video."""
+
+    path: Path
+    language: Optional[str] = None   # ISO 639-1/2 code, e.g. "cs"
+    flag: Optional[str] = None       # "forced" | "sdh" | "default"
+
+    @property
+    def label(self) -> str:
+        """Human-readable ``jazyk (flag)`` for display, e.g. ``cs (forced)``."""
+        text = self.language or "?"
+        return f"{text} ({self.flag})" if self.flag else text
+
+
+def subtitle_filename(
+    video_stem: str, ext: str, language: Optional[str] = None,
+    flag: Optional[str] = None,
+) -> str:
+    """Canonical subtitle filename: ``{video_stem}[.language][.flag]{ext}``."""
+    parts = [video_stem]
+    if language:
+        parts.append(language.strip().lower())
+    if flag:
+        parts.append(flag.strip().lower())
+    return ".".join(parts) + ext.lower()
+
+
+def _parse_subtitle_name(
+    video_stem: str, filename: str
+) -> Optional[tuple[Optional[str], Optional[str]]]:
+    """``(language, flag)`` if ``filename`` is a subtitle sidecar of ``video_stem``."""
+    candidate = Path(filename)
+    if candidate.suffix.lower() not in SUBTITLE_EXTENSIONS:
+        return None
+    stem = candidate.stem
+    if stem == video_stem:
+        return None, None
+    if not stem.startswith(f"{video_stem}."):
+        return None
+    tokens = [t for t in stem[len(video_stem) + 1:].split(".") if t]
+    if not tokens:
+        return None, None
+    language: Optional[str] = None
+    flag: Optional[str] = None
+    for token in tokens:
+        low = token.lower()
+        if low in _FLAGS:
+            flag = low
+        elif language is None and _LANG_RE.fullmatch(low):
+            language = low
+    return language, flag
+
+
+def find_subtitles(video_path: Path) -> list[SubtitleFile]:
+    """Every external subtitle sidecar sitting next to ``video_path``, sorted."""
+    video_path = Path(video_path)
+    folder = video_path.parent
+    if not folder.is_dir():
+        return []
+    found: list[SubtitleFile] = []
+    for f in sorted(folder.iterdir()):
+        if not f.is_file():
+            continue
+        parsed = _parse_subtitle_name(video_path.stem, f.name)
+        if parsed is None:
+            continue
+        language, flag = parsed
+        found.append(SubtitleFile(f, language, flag))
+    return found
+
+
+def attach_subtitle(
+    video_path: Path, source: Path, *, language: Optional[str] = None,
+    flag: Optional[str] = None, move: bool = False,
+) -> Path:
+    """Copy (or move) ``source`` next to ``video_path``, named to match it.
+
+    An existing subtitle already at that exact name (e.g. replacing the Czech
+    track) is overwritten; nothing else next to the video is touched.
+
+    Raises:
+        ValueError: ``source``'s extension isn't a recognised subtitle format.
+    """
+    video_path = Path(video_path)
+    source = Path(source)
+    ext = source.suffix.lower()
+    if ext not in SUBTITLE_EXTENSIONS:
+        raise ValueError(f"Nepodporovaný formát titulků: {source.suffix}")
+    target = video_path.parent / subtitle_filename(video_path.stem, ext, language, flag)
+    if target.exists():
+        target.unlink()
+    if move:
+        shutil.move(str(source), str(target))
+    else:
+        shutil.copy2(source, target)
+    return target
+
+
+def rename_subtitles_with(old_video_path: Path, new_video_path: Path) -> list[Path]:
+    """Move every subtitle sidecar of ``old_video_path`` to match ``new_video_path``.
+
+    Call this wherever a video gets renamed/moved so an attached subtitle never
+    silently detaches (its stem would stop matching and Jellyfin would drop it).
+    No-op when the video's path didn't actually change. Returns the new paths.
+    """
+    old_video_path = Path(old_video_path)
+    new_video_path = Path(new_video_path)
+    if old_video_path == new_video_path:
+        return []
+    moved: list[Path] = []
+    for sub in find_subtitles(old_video_path):
+        target = new_video_path.parent / subtitle_filename(
+            new_video_path.stem, sub.path.suffix, sub.language, sub.flag)
+        if sub.path == target:
+            continue
+        target.parent.mkdir(parents=True, exist_ok=True)
+        if target.exists():
+            target.unlink()
+        sub.path.rename(target)
+        moved.append(target)
+    return moved

tests/test_csfd.py

@@ -0,0 +1,255 @@
+"""Tests for the lean ČSFD title-bridge scraper (`src.core.csfd`)."""
+import hashlib
+from unittest.mock import patch
+
+import pytest
+
+from src.core import csfd
+from src.core.csfd import (
+    CsfdError,
+    CsfdFilm,
+    _extract_csfd_id,
+    _is_film_href,
+    _parse_origin,
+    _parse_original_title,
+    _solve_anubis_pow,
+    clean_filename_to_query,
+    fetch_film,
+    find_csfd_url,
+    search_films,
+)
+
+# A trimmed ČSFD film page: Czech title in JSON-LD, USA origin, and a
+# ``.film-names`` list whose USA-flagged entry is the original title.
+FILM_HTML = """
+<html><head>
+<script type="application/ld+json">
+{"@context":"https://schema.org/","@type":"Movie","name":"Vykoupení z věznice Shawshank",
+ "dateCreated":"1994","duration":"PT142M"}
+</script>
+</head><body>
+<div class="film-header-name">
+  <h1>Vykoupení z věznice Shawshank</h1>
+  <ul class="film-names">
+    <li><img src="//x/us.svg" class="flag" title="USA" alt="USA"/> The Shawshank Redemption
+        <span class="normal more-name-link"><a class="more">více</a></span></li>
+    <li class="more-names hidden"><img src="//x/sk.svg" class="flag" title="Slovensko"/>
+        Vykúpenie z väznice Shawshank</li>
+  </ul>
+</div>
+<div class="origin">USA <span class="bullet"></span>
+  <span>1994 <span class="bullet"></span> </span>142 min</div>
+</body></html>
+"""
+
+# A Czech film: ČSFD omits the Czech title from ``.film-names`` (it equals the
+# <h1>) and lists only a foreign festival title — the original title must fall
+# back to the <h1>, not "Cosy Dens".
+CZECH_FILM_HTML = """
+<html><head>
+<script type="application/ld+json">
+{"@type":"Movie","name":"Pelíšky","datePublished":"1999-04-01"}
+</script>
+</head><body>
+<div class="film-header-name"><h1>Pelíšky</h1>
+  <ul class="film-names">
+    <li><img class="flag" title="angličtina"/> Cosy Dens</li>
+    <li><img class="flag" title="Slovensko"/> Pelíšky</li>
+  </ul></div>
+<div class="origin">Česko <span class="bullet"></span><span>1999</span></div>
+</body></html>
+"""
+
+# The real search page groups hits into <section> blocks; a.film-title-name also
+# matches series episodes, so search_films must scope to "Filmy" and drop the
+# two-segment episode hrefs.
+SEARCH_HTML = """
+<html><body>
+<section><div class="box-header"><h2>Filmy</h2></div>
+  <a href="/film/2294-vykoupeni-z-veznice-shawshank/prehled/" class="film-title-name">Vykoupení z věznice Shawshank</a>
+  <a href="/film/248803-film-o-filmu/prehled/" class="film-title-name">Film o filmu</a>
+</section>
+<section><div class="box-header"><h2>Seriály</h2></div>
+  <a href="/film/318290-arrow/620181-x/prehled/" class="film-title-name">Arrow - Vykoupení</a>
+</section>
+</body></html>
+"""
+
+
+class TestCleanFilenameToQuery:
+    def test_strips_release_tags_and_keeps_year(self):
+        assert clean_filename_to_query(
+            "Matrix.1999.1080p.BluRay.x264-GROUP.mkv") == "Matrix 1999"
+
+    def test_handles_spaces_and_parens_year(self):
+        assert clean_filename_to_query(
+            "Forrest Gump (1994) 2160p HDR.mkv") == "Forrest Gump 1994"
+
+    def test_no_year_no_markers(self):
+        assert clean_filename_to_query("Amelie.mkv") == "Amelie"
+
+    def test_underscores_and_resolution(self):
+        assert clean_filename_to_query("Sam_doma_720p.mkv") == "Sam doma"
+
+    def test_falls_back_to_stem_when_starting_with_marker(self):
+        assert clean_filename_to_query("1080p.mkv") == "1080p"
+
+
+class TestExtractCsfdId:
+    def test_extract_from_various_urls(self):
+        assert _extract_csfd_id(
+            "https://www.csfd.cz/film/2294-vykoupeni/prehled/") == 2294
+        assert _extract_csfd_id("/film/999/") == 999
+
+    def test_none_when_absent(self):
+        assert _extract_csfd_id("https://www.csfd.cz/") is None
+
+
+class TestAnubisPoW:
+    def test_solve_difficulty_one_gives_one_leading_zero_nibble(self):
+        hash_hex, nonce, _ = _solve_anubis_pow("abc123", difficulty=1)
+        assert hash_hex[0] == "0"
+        assert hashlib.sha256(f"abc123{nonce}".encode()).hexdigest() == hash_hex
+
+    def test_solve_difficulty_two_gives_leading_zero_byte(self):
+        hash_hex, _, _ = _solve_anubis_pow("seed", difficulty=2)
+        assert hash_hex[:2] == "00"
+
+
+class TestParseOrigin:
+    def test_country_and_year_from_bullet_format(self):
+        from bs4 import BeautifulSoup
+        soup = BeautifulSoup(FILM_HTML, "html.parser")
+        assert _parse_origin(soup) == ("USA", "1994")
+
+    def test_first_country_of_coproduction(self):
+        from bs4 import BeautifulSoup
+        html = ('<div class="origin">Francie / Německo <span class="bullet"></span>'
+                '<span>2001</span> 120 min</div>')
+        soup = BeautifulSoup(html, "html.parser")
+        assert _parse_origin(soup) == ("Francie", "2001")
+
+
+class TestParseOriginalTitle:
+    def test_picks_name_matching_origin_country(self):
+        from bs4 import BeautifulSoup
+        soup = BeautifulSoup(FILM_HTML, "html.parser")
+        assert _parse_original_title(soup, "USA") == "The Shawshank Redemption"
+
+    def test_none_without_country_match_so_caller_uses_czech_title(self):
+        # A Czech film lists only foreign/festival alt-titles here — none match
+        # the origin country, so we must NOT return one of them.
+        from bs4 import BeautifulSoup
+        html = ('<ul class="film-names">'
+                '<li><img class="flag" title="angličtina"/> Loners</li>'
+                '<li><img class="flag" title="Slovinsko"/> Samotarji</li></ul>')
+        soup = BeautifulSoup(html, "html.parser")
+        assert _parse_original_title(soup, "Česko") is None
+
+    def test_cesko_matches_ceskoslovensko_flag(self):
+        from bs4 import BeautifulSoup
+        html = ('<ul class="film-names">'
+                '<li><img class="flag" title="Československo"/> Ostře sledované vlaky</li>'
+                '</ul>')
+        soup = BeautifulSoup(html, "html.parser")
+        assert _parse_original_title(soup, "Česko") == "Ostře sledované vlaky"
+
+    def test_none_when_no_names(self):
+        from bs4 import BeautifulSoup
+        soup = BeautifulSoup("<div>x</div>", "html.parser")
+        assert _parse_original_title(soup, "USA") is None
+
+
+class TestFetchFilm:
+    def test_parses_czech_and_original_title_and_year(self):
+        class _Resp:
+            text = FILM_HTML
+
+        with patch("src.core.csfd._get_page", return_value=_Resp()):
+            film = fetch_film("https://www.csfd.cz/film/2294-x/")
+
+        assert film.czech_title == "Vykoupení z věznice Shawshank"
+        assert film.original_title == "The Shawshank Redemption"
+        assert film.year == "1994"
+        assert film.csfd_id == 2294
+        assert film.tmdb_query == ("The Shawshank Redemption", "1994")
+
+    def test_czech_film_original_title_falls_back_to_czech(self):
+        class _Resp:
+            text = CZECH_FILM_HTML
+
+        with patch("src.core.csfd._get_page", return_value=_Resp()):
+            film = fetch_film("https://www.csfd.cz/film/15387-pelisky/")
+
+        assert film.czech_title == "Pelíšky"
+        assert film.original_title == "Pelíšky"
+        assert film.year == "1999"
+        assert film.tmdb_query == ("Pelíšky", "1999")
+
+    def test_wraps_network_error_in_csfd_error(self):
+        import requests
+
+        with patch("src.core.csfd._get_page",
+                   side_effect=requests.RequestException("boom")):
+            with pytest.raises(CsfdError):
+                fetch_film("https://www.csfd.cz/film/1/")
+
+
+class TestIsFilmHref:
+    def test_accepts_single_segment_film(self):
+        assert _is_film_href("/film/2294-vykoupeni/prehled/") is True
+        assert _is_film_href("/film/2294-vykoupeni/") is True
+
+    def test_rejects_series_episode(self):
+        assert _is_film_href("/film/318290-arrow/620181-vykoupeni/prehled/") is False
+
+    def test_rejects_non_film(self):
+        assert _is_film_href("/tvurce/123-nekdo/") is False
+
+
+class TestSearchFilms:
+    def test_scopes_to_films_section_and_drops_episodes(self):
+        class _Resp:
+            text = SEARCH_HTML
+
+        with patch("src.core.csfd._get_page", return_value=_Resp()):
+            films = search_films("shawshank", limit=5)
+
+        # the Seriály-section episode link is excluded
+        assert [f.csfd_id for f in films] == [2294, 248803]
+        assert films[0].url == (
+            "https://www.csfd.cz/film/2294-vykoupeni-z-veznice-shawshank/prehled/")
+
+    def test_empty_query_returns_empty(self):
+        assert search_films("   ") == []
+
+
+class TestFindCsfdUrl:
+    def test_returns_first_hit_url(self):
+        hit = CsfdFilm(url="https://www.csfd.cz/film/2294-x/", csfd_id=2294)
+        with patch("src.core.csfd.search_films", return_value=[hit]):
+            assert find_csfd_url("shawshank 1994") == "https://www.csfd.cz/film/2294-x/"
+
+    def test_retries_without_trailing_year_when_first_query_misses(self):
+        hit = CsfdFilm(url="https://www.csfd.cz/film/221006-vratne-lahve/", csfd_id=221006)
+        calls: list[str] = []
+
+        def fake_search(query, limit=1, session=None):
+            calls.append(query)
+            return [] if query.endswith("2006") else [hit]
+
+        with patch("src.core.csfd.search_films", side_effect=fake_search):
+            assert find_csfd_url("Vratne lahve 2006") == hit.url
+        assert calls == ["Vratne lahve 2006", "Vratne lahve"]
+
+    def test_none_for_blank_query(self):
+        assert find_csfd_url("   ") is None
+
+    def test_none_when_no_results(self):
+        with patch("src.core.csfd.search_films", return_value=[]):
+            assert find_csfd_url("nic") is None
+
+
+class TestDependencies:
+    def test_dependencies_available_in_test_env(self):
+        assert csfd.dependencies_available() is True

tests/test_file.py

@@ -37,7 +37,7 @@ class TestFile:
     def test_file_metadata_saved_to_index(self, test_file, tag_manager, index):
         """Metadata jsou zapsána do indexu už při vytvoření."""
         file_obj = File(test_file, tag_manager, index=index)
-        assert index.get(file_obj.file_path) is not None
+        assert index.record_for(file_obj.file_path) is not None
 
     def test_file_no_sidecar_written(self, test_file, tag_manager, index):
         """Žádný .!tag sidecar už nevzniká."""
@@ -57,7 +57,7 @@ class TestFile:
         file_obj.ignored = True
         file_obj.save_metadata()
 
-        data = index.get(file_obj.file_path)
+        data = index.record_for(file_obj.file_path)
         assert data["new"] is False
         assert data["ignored"] is True
 
@@ -78,7 +78,7 @@ class TestFile:
         file_obj = File(test_file, tag_manager, index=index)
         file_obj.set_date("2025-12-25")
         assert file_obj.date == "2025-12-25"
-        assert index.get(file_obj.file_path)["date"] == "2025-12-25"
+        assert index.record_for(file_obj.file_path)["date"] == "2025-12-25"
 
     def test_file_set_date_to_none(self, test_file, tag_manager, index):
         file_obj = File(test_file, tag_manager, index=index)
@@ -169,7 +169,7 @@ class TestFile:
         file_obj.add_tag("Test/Tag")
         file_obj.set_date("2025-06-15")
 
-        data = index.get(file_obj.file_path)
+        data = index.record_for(file_obj.file_path)
         assert "new" in data
         assert "ignored" in data
         assert "tags" in data

tests/test_file_manager.py

@@ -208,7 +208,7 @@ class TestPoolManagement:
         assert movie.file_path == tmp_path / "pool" / "Filmy" / "Matrix.mkv"
         assert source.exists()  # non-destructive copy
         assert movie.title == "Matrix"
-        assert file_manager.index.get(movie.file_path) is not None
+        assert file_manager.index.record_for(movie.file_path) is not None
 
     def test_statistics_aggregates_pool(self, file_manager, tmp_path):
         file_manager.set_pool_dir(tmp_path / "pool")
@@ -274,7 +274,7 @@ class TestPoolManagement:
         # parseable ISO timestamp, persisted in the index
         from datetime import datetime
         datetime.fromisoformat(movie.added)
-        assert file_manager.index.get(movie.file_path)["added"] == movie.added
+        assert file_manager.index.record_for(movie.file_path)["added"] == movie.added
 
     def test_import_movie_move_removes_source(self, file_manager, tmp_path):
         file_manager.set_pool_dir(tmp_path / "pool")
@@ -325,7 +325,7 @@ class TestPoolManagement:
         assert second.file_path.read_bytes() == b"bb"  # new content in place
         assert [f.file_path.name for f in file_manager.filelist] == ["Matrix.mkv"]
         # index record reflects the new import (fresh metadata, old tags dropped)
-        record = file_manager.index.get(second.file_path)
+        record = file_manager.index.record_for(second.file_path)
         assert record is not None
         assert record["tags"] == []
         assert second.tags == []
@@ -367,8 +367,8 @@ class TestPoolManagement:
         assert not old_path.exists()
         assert movie.title == "Matrix Reloaded"
         # metadata moved to the new key, old key gone, tags preserved
-        assert file_manager.index.get(new_path) is not None
+        assert file_manager.index.record_for(new_path) is not None
-        assert file_manager.index.get(old_path) is None
+        assert file_manager.index.record_for(old_path) is None
         # a fresh manager reading the index sees the renamed file with its tags
         reloaded = FileManager(TagManager())
         reloaded.set_pool_dir(tmp_path / "pool")
@@ -427,6 +427,15 @@ class TestPoolManagement:
         assert movie.file_path.name == "Matrix (1999) [tmdbid-603].mkv"
         assert movie.title == "Matrix"  # clean title, no year/id
 
+    def test_import_movie_with_3d_format(self, file_manager, tmp_path):
+        file_manager.set_pool_dir(tmp_path / "pool")
+        (tmp_path / "raw.mkv").write_bytes(b"x")
+
+        movie = file_manager.import_movie(
+            tmp_path / "raw.mkv", "Avatar", year=2009, tmdb_id=19995, format_3d="hsbs")
+
+        assert movie.file_path.name == "Avatar (2009) [tmdbid-19995].3D.HSBS.mkv"
+
     def test_libraries_default_and_derivation(self, file_manager, tmp_path):
         file_manager.set_pool_dir(tmp_path / "pool")
         assert file_manager.libraries == [
@@ -529,15 +538,18 @@ class TestPoolManagement:
         file_manager.set_movie_libraries(["Filmy", "Kids"])
         (tmp_path / "a.mkv").write_bytes(b"x")
         movie = file_manager.import_movie(tmp_path / "a.mkv", "Auta", year=2006)
-        old_key = movie.file_path.relative_to(tmp_path / "pool").as_posix()
+        old_path = movie.file_path
 
         file_manager.move_to_library(movie, "Kids")
 
         assert file_manager.library_of(movie) == "Kids"
         assert movie.file_path.exists()
-        assert file_manager.index.records.get(old_key) is None  # old key dropped
+        # The movie keeps its identity record; only its media path + library move.
-        new_key = movie.file_path.relative_to(tmp_path / "pool").as_posix()
+        assert file_manager.index.record_for(old_path) is None
-        assert file_manager.index.records.get(new_key) is not None
+        record = file_manager.index.record_for(movie.file_path)
+        assert record is not None
+        assert record["library"] == "Kids"
+        assert [m["file"] for m in record["media"]] == ["Kids/Auta (2006).mkv"]
 
     def test_move_to_unknown_library_rejected(self, file_manager, tmp_path):
         file_manager.set_pool_dir(tmp_path / "pool")
@@ -613,6 +625,42 @@ class TestPoolManagement:
                                        csfd_url="https://www.csfd.cz/film/9499-matrix/")
         assert movie.csfd_url == "https://www.csfd.cz/film/9499-matrix/"
 
+    def test_apply_movie_edits_sets_3d_format(self, file_manager, tmp_path):
+        file_manager.set_pool_dir(tmp_path / "pool")
+        (tmp_path / "a.mkv").write_bytes(b"x")
+        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
+
+        file_manager.apply_movie_edits(
+            movie, title="Avatar", year=2009, tmdb_id=19995, format_3d="hsbs")
+
+        assert movie.file_path.name == "Avatar (2009) [tmdbid-19995].3D.HSBS.mkv"
+
+    def test_apply_movie_edits_omitted_3d_format_is_preserved(self, file_manager, tmp_path):
+        """Editing an unrelated field (e.g. date) must not silently drop the tag."""
+        file_manager.set_pool_dir(tmp_path / "pool")
+        (tmp_path / "a.mkv").write_bytes(b"x")
+        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
+        file_manager.apply_movie_edits(
+            movie, title="Avatar", year=2009, tmdb_id=19995, format_3d="hsbs")
+
+        file_manager.apply_movie_edits(
+            movie, title="Avatar", year=2009, tmdb_id=19995, date="2026-01-01")
+
+        assert movie.file_path.name == "Avatar (2009) [tmdbid-19995].3D.HSBS.mkv"
+        assert movie.date == "2026-01-01"
+
+    def test_apply_movie_edits_empty_string_clears_3d_format(self, file_manager, tmp_path):
+        file_manager.set_pool_dir(tmp_path / "pool")
+        (tmp_path / "a.mkv").write_bytes(b"x")
+        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
+        file_manager.apply_movie_edits(
+            movie, title="Avatar", year=2009, tmdb_id=19995, format_3d="hsbs")
+
+        file_manager.apply_movie_edits(
+            movie, title="Avatar", year=2009, tmdb_id=19995, format_3d="")
+
+        assert movie.file_path.name == "Avatar (2009) [tmdbid-19995].mkv"
+
     def test_apply_movie_edits_rejects_name_clash(self, file_manager, tmp_path):
         file_manager.set_pool_dir(tmp_path / "pool")
         (tmp_path / "a.mkv").write_bytes(b"x")
@@ -634,6 +682,19 @@ class TestPoolManagement:
         assert renamed is not None
         assert movie.file_path.name == "Matrix Reloaded (1999) [tmdbid-603].mkv"
 
+    def test_rename_to_canonical_preserves_3d_format(self, file_manager, tmp_path):
+        file_manager.set_pool_dir(tmp_path / "pool")
+        (tmp_path / "raw.mkv").write_bytes(b"x")
+        movie = file_manager.import_movie(
+            tmp_path / "raw.mkv", "Avatar", year=2009, tmdb_id=19995)
+        file_manager.apply_movie_edits(
+            movie, title="Avatar", year=2009, tmdb_id=19995, format_3d="fsbs")
+
+        movie.title = "Avatar Retitled"
+        file_manager.rename_to_canonical(movie)
+
+        assert movie.file_path.name == "Avatar Retitled (2009) [tmdbid-19995].3D.FSBS.mkv"
+
     def test_import_movie_rejects_invalid_year(self, file_manager, tmp_path):
         file_manager.set_pool_dir(tmp_path / "pool")
         (tmp_path / "a.mkv").write_bytes(b"a")
@@ -734,3 +795,578 @@ class TestPoolManagement:
         assert file_manager.copyasis_folders == ["Seriály", "Filmy jinak"]
         assert "copyasis_folders" not in file_manager.global_config
         assert file_manager.index.get_setting("copyasis_folders") == ["Seriály", "Filmy jinak"]
+
+
+class TestCsfdBridge:
+    """ČSFD → TMDb title bridge (resolve_via_csfd, migration wiring)."""
+
+    @pytest.fixture
+    def temp_global_config(self, tmp_path, monkeypatch):
+        config_path = tmp_path / "test_config.json"
+        import src.core.config as config_module
+        monkeypatch.setattr(config_module, "GLOBAL_CONFIG_FILE", config_path)
+        return config_path
+
+    @pytest.fixture
+    def file_manager(self, temp_global_config):
+        return FileManager(TagManager())
+
+    def test_resolve_via_csfd_bridges_original_title_to_tmdb(
+        self, file_manager, monkeypatch
+    ):
+        from src.core import csfd, tmdb
+        film = csfd.CsfdFilm(
+            url="https://www.csfd.cz/film/2294-x/", csfd_id=2294,
+            czech_title="Vykoupení z věznice Shawshank",
+            original_title="The Shawshank Redemption", year="1994")
+        monkeypatch.setattr(csfd, "fetch_film", lambda url, session=None: film)
+        monkeypatch.setattr(tmdb, "api_available", lambda: True)
+
+        captured: dict = {}
+
+        def fake_search(query, year=None, limit=5):
+            captured["query"], captured["year"] = query, year
+            return [tmdb.TmdbResult(278, "Vykoupení z věznice Shawshank", "1994", "movie")]
+
+        monkeypatch.setattr(tmdb, "search_movie", fake_search)
+
+        result = file_manager.resolve_via_csfd(
+            csfd_url="https://www.csfd.cz/film/2294-x/")
+
+        assert captured == {"query": "The Shawshank Redemption", "year": "1994"}
+        assert result["tmdb"].tmdb_id == 278
+        assert result["film"] is film
+
+    def test_resolve_via_csfd_swallows_scrape_failure(self, file_manager, monkeypatch):
+        from src.core import csfd
+
+        def boom(url, session=None):
+            raise csfd.CsfdError("anti-bot")
+
+        monkeypatch.setattr(csfd, "fetch_film", boom)
+        result = file_manager.resolve_via_csfd(csfd_url="https://www.csfd.cz/film/1/")
+        assert result == {"csfd_url": "https://www.csfd.cz/film/1/",
+                          "film": None, "tmdb": None}
+
+    def test_match_pool_uses_csfd_url_for_the_search(
+        self, file_manager, tmp_path, monkeypatch
+    ):
+        from src.core import csfd, tmdb
+        file_manager.set_pool_dir(tmp_path / "pool")
+        (tmp_path / "a.mkv").write_bytes(b"x")
+        movie = file_manager.import_movie(
+            tmp_path / "a.mkv", "Vykoupení z věznice Shawshank", year=1994,
+            csfd_url="https://www.csfd.cz/film/2294-x/")
+
+        film = csfd.CsfdFilm(
+            url=movie.csfd_url, czech_title="Vykoupení z věznice Shawshank",
+            original_title="The Shawshank Redemption", year="1994")
+        monkeypatch.setattr(csfd, "fetch_film", lambda url, session=None: film)
+        monkeypatch.setattr(tmdb, "api_available", lambda: True)
+
+        seen: list = []
+
+        def fake_search(query, year=None, limit=5):
+            seen.append((query, year))
+            return [tmdb.TmdbResult(278, "The Shawshank Redemption", "1994", "movie")]
+
+        monkeypatch.setattr(tmdb, "search_movie", fake_search)
+
+        proposals = file_manager.match_pool_to_tmdb([movie])
+
+        assert seen == [("The Shawshank Redemption", "1994")]
+        assert len(proposals) == 1
+        assert proposals[0].status == "auto"
+        assert proposals[0].chosen.tmdb_id == 278
+        assert "ČSFD" in proposals[0].note
+
+
+class TestSubtitleAttachment:
+    """External subtitle sidecars for movies (attach / list / remove / rename-along)."""
+
+    @pytest.fixture
+    def temp_global_config(self, tmp_path, monkeypatch):
+        config_path = tmp_path / "test_config.json"
+        import src.core.config as config_module
+        monkeypatch.setattr(config_module, "GLOBAL_CONFIG_FILE", config_path)
+        return config_path
+
+    @pytest.fixture
+    def file_manager(self, temp_global_config, tmp_path):
+        fm = FileManager(TagManager())
+        fm.set_pool_dir(tmp_path / "pool")
+        return fm
+
+    def test_attach_subtitle_copies_next_to_movie(self, file_manager, tmp_path):
+        (tmp_path / "raw.mkv").write_bytes(b"x")
+        movie = file_manager.import_movie(tmp_path / "raw.mkv", "Matrix", year=1999)
+        srt = tmp_path / "downloaded.srt"
+        srt.write_bytes(b"1\n00:00:01,000 --> 00:00:02,000\nAhoj\n")
+
+        target = file_manager.attach_subtitle(movie, srt, language="cs")
+
+        assert target == movie.file_path.with_name("Matrix (1999).cs.srt")
+        assert target.exists()
+        assert srt.exists()  # copied, not moved
+        assert [s.path for s in file_manager.list_subtitles(movie)] == [target]
+
+    def test_remove_subtitle_deletes_file(self, file_manager, tmp_path):
+        (tmp_path / "raw.mkv").write_bytes(b"x")
+        movie = file_manager.import_movie(tmp_path / "raw.mkv", "Matrix", year=1999)
+        srt = tmp_path / "s.srt"
+        srt.write_bytes(b"x")
+        target = file_manager.attach_subtitle(movie, srt, language="cs")
+
+        file_manager.remove_subtitle(target)
+
+        assert not target.exists()
+        assert file_manager.list_subtitles(movie) == []
+
+    def test_rename_movie_carries_subtitle_along(self, file_manager, tmp_path):
+        (tmp_path / "raw.mkv").write_bytes(b"x")
+        movie = file_manager.import_movie(tmp_path / "raw.mkv", "Matrix", year=1999)
+        srt = tmp_path / "s.srt"
+        srt.write_bytes(b"x")
+        old_sub = file_manager.attach_subtitle(movie, srt, language="cs")
+
+        file_manager.rename_movie(movie, "Matrix Reloaded")
+
+        assert not old_sub.exists()
+        new_sub = movie.file_path.with_name("Matrix Reloaded.cs.srt")
+        assert new_sub.exists()
+
+    def test_apply_movie_edits_carries_subtitle_along(self, file_manager, tmp_path):
+        (tmp_path / "raw.mkv").write_bytes(b"x")
+        movie = file_manager.import_movie(tmp_path / "raw.mkv", "Matrix", year=1999)
+        srt = tmp_path / "s.srt"
+        srt.write_bytes(b"x")
+        file_manager.attach_subtitle(movie, srt, language="cs", flag="forced")
+
+        file_manager.apply_movie_edits(movie, title="Matrix", year=1999, tmdb_id=603)
+
+        assert movie.file_path.name == "Matrix (1999) [tmdbid-603].mkv"
+        assert movie.file_path.with_name(
+            "Matrix (1999) [tmdbid-603].cs.forced.srt").exists()
+
+    def test_move_to_library_carries_subtitle_along(self, file_manager, tmp_path):
+        file_manager.set_movie_libraries(["Filmy", "Kids"])
+        (tmp_path / "raw.mkv").write_bytes(b"x")
+        movie = file_manager.import_movie(tmp_path / "raw.mkv", "Matrix", year=1999)
+        srt = tmp_path / "s.srt"
+        srt.write_bytes(b"x")
+        file_manager.attach_subtitle(movie, srt, language="cs")
+
+        file_manager.move_to_library(movie, "Kids")
+
+        assert movie.file_path == tmp_path / "pool" / "Kids" / "Matrix (1999).mkv"
+        assert (tmp_path / "pool" / "Kids" / "Matrix (1999).cs.srt").exists()
+        assert not (tmp_path / "pool" / "Filmy" / "Matrix (1999).cs.srt").exists()
+
+
+class TestMinidlnaScope:
+    """Which libraries feed miniDLNA generation (minidlna_libraries / scope)."""
+
+    @pytest.fixture
+    def temp_global_config(self, tmp_path, monkeypatch):
+        config_path = tmp_path / "test_config.json"
+        import src.core.config as config_module
+        monkeypatch.setattr(config_module, "GLOBAL_CONFIG_FILE", config_path)
+        return config_path
+
+    @pytest.fixture
+    def file_manager(self, temp_global_config, tmp_path):
+        fm = FileManager(TagManager())
+        fm.set_pool_dir(tmp_path / "pool")
+        return fm
+
+    def test_default_is_none_meaning_all(self, file_manager):
+        assert file_manager.minidlna_libraries is None
+
+    def test_default_scope_is_the_whole_pool(self, file_manager, tmp_path):
+        file_manager.set_libraries([
+            {"name": "Filmy", "kind": "movie"}, {"name": "Seriály", "kind": "series"}])
+        (tmp_path / "a.mkv").write_bytes(b"x")
+        movie = file_manager.import_movie(tmp_path / "a.mkv", "Matrix", year=1999)
+
+        movies, mirrors, mixed_series = file_manager.minidlna_scope()
+
+        assert movies == [movie]
+        assert mirrors == ["Seriály"]
+        assert mixed_series == []
+
+    def test_scope_filters_to_selected_libraries(self, file_manager, tmp_path):
+        file_manager.set_libraries([
+            {"name": "Filmy", "kind": "movie"}, {"name": "Kids", "kind": "movie"},
+            {"name": "Seriály", "kind": "series"}, {"name": "Dokumenty", "kind": "series"}])
+        (tmp_path / "a.mkv").write_bytes(b"x")
+        (tmp_path / "b.mkv").write_bytes(b"x")
+        in_scope = file_manager.import_movie(
+            tmp_path / "a.mkv", "Matrix", year=1999, library="Filmy")
+        file_manager.import_movie(tmp_path / "b.mkv", "Kids Movie", year=2005, library="Kids")
+
+        file_manager.set_minidlna_libraries(["Filmy", "Seriály"])
+        movies, mirrors, mixed_series = file_manager.minidlna_scope()
+
+        assert movies == [in_scope]
+        assert mirrors == ["Seriály"]
+        assert mixed_series == []
+
+    def test_homevideo_libraries_are_mirrored_like_series(self, file_manager):
+        file_manager.set_libraries([
+            {"name": "Seriály", "kind": "series"}, {"name": "Dokumenty", "kind": "homevideo"}])
+
+        assert file_manager.mirror_as_is_libraries == ["Seriály", "Dokumenty"]
+        _, mirrors, _ = file_manager.minidlna_scope()
+        assert mirrors == ["Seriály", "Dokumenty"]
+
+    def test_homevideo_library_excluded_when_not_selected(self, file_manager):
+        file_manager.set_libraries([
+            {"name": "Seriály", "kind": "series"}, {"name": "Dokumenty", "kind": "homevideo"}])
+        file_manager.set_minidlna_libraries(["Seriály"])
+
+        _, mirrors, _ = file_manager.minidlna_scope()
+        assert mirrors == ["Seriály"]
+
+    def test_copyasis_folders_stays_series_only(self, file_manager):
+        """The library-organizer "copy-as-is" concept doesn't widen to homevideo."""
+        file_manager.set_libraries([
+            {"name": "Seriály", "kind": "series"}, {"name": "Dokumenty", "kind": "homevideo"}])
+        assert file_manager.copyasis_folders == ["Seriály"]
+
+    def test_set_none_resets_to_all(self, file_manager):
+        file_manager.set_minidlna_libraries(["Filmy"])
+        file_manager.set_minidlna_libraries(None)
+        assert file_manager.minidlna_libraries is None
+
+    def test_drops_unknown_library_names_on_read(self, file_manager):
+        file_manager.set_libraries([{"name": "Filmy", "kind": "movie"}])
+        file_manager.set_minidlna_libraries(["Filmy", "Zaniklá knihovna"])
+        assert file_manager.minidlna_libraries == ["Filmy"]
+
+    def test_persists_across_reload(self, file_manager, tmp_path):
+        file_manager.set_libraries([{"name": "Filmy", "kind": "movie"}])
+        file_manager.set_minidlna_libraries(["Filmy"])
+
+        reloaded = FileManager(TagManager())
+        reloaded.set_pool_dir(tmp_path / "pool")
+        assert reloaded.minidlna_libraries == ["Filmy"]
+
+    def test_mixed_library_series_returned_separately_from_movies(
+        self, file_manager, tmp_path
+    ):
+        file_manager.set_libraries([{"name": "Hlavní", "kind": "mixed"}])
+        (tmp_path / "movie.mkv").write_bytes(b"x")
+        movie = file_manager.import_movie(
+            tmp_path / "movie.mkv", "Matrix", year=1999, library="Hlavní")
+        (tmp_path / "bb.S01E01.mkv").write_bytes(b"x")
+        file_manager.import_episodes(
+            [tmp_path / "bb.S01E01.mkv"], "Breaking Bad", year=2008, tmdb_id=1396,
+            library="Hlavní")
+
+        movies, mirrors, mixed_series = file_manager.minidlna_scope()
+
+        assert movies == [movie]
+        assert mirrors == []
+        assert len(mixed_series) == 1
+        assert mixed_series[0].title == "Breaking Bad"
+        assert mixed_series[0].library == "Hlavní"
+
+    def test_mixed_library_series_excluded_when_library_not_selected(
+        self, file_manager, tmp_path
+    ):
+        file_manager.set_libraries([
+            {"name": "Hlavní", "kind": "mixed"}, {"name": "Filmy", "kind": "movie"}])
+        (tmp_path / "bb.S01E01.mkv").write_bytes(b"x")
+        file_manager.import_episodes(
+            [tmp_path / "bb.S01E01.mkv"], "Breaking Bad", year=2008, library="Hlavní")
+
+        file_manager.set_minidlna_libraries(["Filmy"])
+        _, _, mixed_series = file_manager.minidlna_scope()
+
+        assert mixed_series == []
+
+
+class TestMinidlnaPruneTargets:
+    """What to remove from a previous generation's output once deselected."""
+
+    @pytest.fixture
+    def temp_global_config(self, tmp_path, monkeypatch):
+        config_path = tmp_path / "test_config.json"
+        import src.core.config as config_module
+        monkeypatch.setattr(config_module, "GLOBAL_CONFIG_FILE", config_path)
+        return config_path
+
+    @pytest.fixture
+    def file_manager(self, temp_global_config, tmp_path):
+        fm = FileManager(TagManager())
+        fm.set_pool_dir(tmp_path / "pool")
+        return fm
+
+    def test_deselected_series_library_is_stale(self, file_manager):
+        file_manager.set_libraries([
+            {"name": "Anime", "kind": "series"}, {"name": "Dokumenty", "kind": "homevideo"}])
+        # both deselected — neither is "Seriály" so both go whole-folder
+        stale, valid = file_manager.minidlna_prune_targets(
+            mirror_libs=[], mixed_series=[], mixed_series_bucket="Seriály")
+        assert set(stale) == {"Anime", "Dokumenty"}
+        assert valid == set()
+
+    def test_selected_library_is_not_stale(self, file_manager):
+        file_manager.set_libraries([{"name": "Anime", "kind": "series"}])
+        stale, _ = file_manager.minidlna_prune_targets(
+            mirror_libs=["Anime"], mixed_series=[], mixed_series_bucket="Seriály")
+        assert stale == []
+
+    def test_bucket_named_library_never_whole_folder_removed(self, file_manager):
+        """A real 'Seriály' library, even deselected, is reconciled per-child —
+        never nuked via the whole-folder path (that would also erase valid
+        mixed-library series sharing the same bucket)."""
+        file_manager.set_libraries([{"name": "Seriály", "kind": "series"}])
+        stale, valid = file_manager.minidlna_prune_targets(
+            mirror_libs=[], mixed_series=[], mixed_series_bucket="Seriály")
+        assert "Seriály" not in stale
+        assert valid == set()
+
+    def test_bucket_named_library_selected_contributes_its_children(
+        self, file_manager, tmp_path
+    ):
+        file_manager.set_libraries([{"name": "Seriály", "kind": "series"}])
+        (tmp_path / "pool" / "Seriály" / "Show A").mkdir(parents=True)
+        (tmp_path / "pool" / "Seriály" / "Show B").mkdir(parents=True)
+
+        _, valid = file_manager.minidlna_prune_targets(
+            mirror_libs=["Seriály"], mixed_series=[], mixed_series_bucket="Seriály")
+
+        assert valid == {"Show A", "Show B"}
+
+    def test_mixed_series_folder_names_are_valid(self, file_manager, tmp_path):
+        file_manager.set_libraries([{"name": "Hlavní", "kind": "mixed"}])
+        (tmp_path / "bb.S01E01.mkv").write_bytes(b"x")
+        file_manager.import_episodes(
+            [tmp_path / "bb.S01E01.mkv"], "Breaking Bad", year=2008,
+            tmdb_id=1396, library="Hlavní")
+        _, _, mixed_series = file_manager.minidlna_scope()
+
+        _, valid = file_manager.minidlna_prune_targets(
+            mirror_libs=[], mixed_series=mixed_series, mixed_series_bucket="Seriály")
+
+        assert valid == {"Breaking Bad (2008) [tmdbid-1396]"}
+
+    def test_deselected_mixed_series_drops_out_of_valid(self, file_manager, tmp_path):
+        """Simulates re-running after the mixed library is unchecked: the
+        previously-mirrored series' folder name is no longer valid."""
+        file_manager.set_libraries([{"name": "Hlavní", "kind": "mixed"}])
+        (tmp_path / "bb.S01E01.mkv").write_bytes(b"x")
+        file_manager.import_episodes(
+            [tmp_path / "bb.S01E01.mkv"], "Breaking Bad", year=2008,
+            tmdb_id=1396, library="Hlavní")
+
+        file_manager.set_minidlna_libraries([])  # deselect everything
+        _, _, mixed_series = file_manager.minidlna_scope()
+        _, valid = file_manager.minidlna_prune_targets(
+            mirror_libs=[], mixed_series=mixed_series, mixed_series_bucket="Seriály")
+
+        assert mixed_series == []
+        assert valid == set()
+
+
+class TestMovieVersions:
+    """Multiple versions of one movie (2D+3D, 4K+1080p, …) — flat until a
+    second file shows up, then grouped into a per-movie folder."""
+
+    @pytest.fixture
+    def temp_global_config(self, tmp_path, monkeypatch):
+        config_path = tmp_path / "test_config.json"
+        import src.core.config as config_module
+        monkeypatch.setattr(config_module, "GLOBAL_CONFIG_FILE", config_path)
+        return config_path
+
+    @pytest.fixture
+    def file_manager(self, temp_global_config, tmp_path):
+        fm = FileManager(TagManager())
+        fm.set_pool_dir(tmp_path / "pool")
+        return fm
+
+    def test_flat_movie_is_not_a_group_member(self, file_manager, tmp_path):
+        (tmp_path / "a.mkv").write_bytes(b"x")
+        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
+        assert file_manager.is_movie_group_member(movie) is False
+        assert file_manager.list_movie_versions(movie) == [movie]
+        assert file_manager.visible_movies() == [movie]
+
+    def test_add_version_promotes_flat_movie_to_a_folder(self, file_manager, tmp_path):
+        (tmp_path / "a.mkv").write_bytes(b"2d")
+        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
+        (tmp_path / "b.mkv").write_bytes(b"3d")
+
+        v2 = file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D HSBS")
+
+        base = tmp_path / "pool" / "Filmy" / "Avatar (2009) [tmdbid-19995]"
+        assert movie.file_path == base / "Avatar (2009) [tmdbid-19995] - Výchozí.mkv"
+        assert v2.file_path == base / "Avatar (2009) [tmdbid-19995] - 3D HSBS.mkv"
+        assert file_manager.is_movie_group_member(movie)
+        assert file_manager.is_movie_group_member(v2)
+        assert (tmp_path / "b.mkv").exists()  # copied, not moved (move=False default)
+
+    def test_add_version_carries_subtitle_along_on_promotion(self, file_manager, tmp_path):
+        (tmp_path / "a.mkv").write_bytes(b"2d")
+        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
+        srt = tmp_path / "s.srt"
+        srt.write_bytes(b"x")
+        file_manager.attach_subtitle(movie, srt, language="cs")
+        (tmp_path / "b.mkv").write_bytes(b"3d")
+
+        file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D HSBS")
+
+        base = tmp_path / "pool" / "Filmy" / "Avatar (2009) [tmdbid-19995]"
+        assert (base / "Avatar (2009) [tmdbid-19995] - Výchozí.cs.srt").exists()
+
+    def test_second_version_added_to_existing_group(self, file_manager, tmp_path):
+        (tmp_path / "a.mkv").write_bytes(b"2d")
+        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
+        (tmp_path / "b.mkv").write_bytes(b"3d")
+        file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D HSBS")
+        (tmp_path / "c.mkv").write_bytes(b"4k")
+
+        v3 = file_manager.add_movie_version(movie, tmp_path / "c.mkv", "4K")
+
+        assert len(file_manager.list_movie_versions(movie)) == 3
+        assert v3.file_path.name == "Avatar (2009) [tmdbid-19995] - 4K.mkv"
+
+    def test_add_version_rejects_empty_label(self, file_manager, tmp_path):
+        (tmp_path / "a.mkv").write_bytes(b"x")
+        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
+        with pytest.raises(ValueError):
+            file_manager.add_movie_version(movie, tmp_path / "a.mkv", "  ")
+
+    def test_add_version_rejects_duplicate_label(self, file_manager, tmp_path):
+        (tmp_path / "a.mkv").write_bytes(b"2d")
+        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
+        (tmp_path / "b.mkv").write_bytes(b"3d")
+        file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D")
+        (tmp_path / "c.mkv").write_bytes(b"3d-2")
+        with pytest.raises(FileExistsError):
+            file_manager.add_movie_version(movie, tmp_path / "c.mkv", "3D")
+
+    def test_visible_movies_shows_only_the_primary_version(self, file_manager, tmp_path):
+        (tmp_path / "a.mkv").write_bytes(b"2d")
+        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
+        movie.add_tag("Žánr/Sci-Fi")
+        movie.csfd_url = "https://www.csfd.cz/film/avatar/"
+        movie.save_metadata()
+        (tmp_path / "b.mkv").write_bytes(b"3d")
+        file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D HSBS")
+
+        visible = file_manager.visible_movies()
+
+        assert len(visible) == 1
+        assert visible[0].file_path == movie.file_path
+        assert visible[0].title == "Avatar"
+        assert visible[0].csfd_url == "https://www.csfd.cz/film/avatar/"
+        assert {t.full_path for t in visible[0].tags} == {"Žánr/Sci-Fi"}
+
+    def test_remove_version_keeps_group_when_more_than_one_remains(self, file_manager, tmp_path):
+        (tmp_path / "a.mkv").write_bytes(b"2d")
+        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
+        (tmp_path / "b.mkv").write_bytes(b"3d")
+        v2 = file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D")
+        (tmp_path / "c.mkv").write_bytes(b"4k")
+        v3 = file_manager.add_movie_version(movie, tmp_path / "c.mkv", "4K")
+
+        file_manager.remove_movie_version(v3)
+
+        assert not v3.file_path.exists()
+        assert file_manager.is_movie_group_member(movie)
+        assert file_manager.is_movie_group_member(v2)
+        assert len(file_manager.list_movie_versions(movie)) == 2
+
+    def test_remove_last_extra_version_demotes_to_flat(self, file_manager, tmp_path):
+        (tmp_path / "a.mkv").write_bytes(b"2d")
+        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
+        (tmp_path / "b.mkv").write_bytes(b"3d")
+        v2 = file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D")
+
+        file_manager.remove_movie_version(v2)
+
+        assert not file_manager.is_movie_group_member(movie)
+        assert movie.file_path == tmp_path / "pool" / "Filmy" / "Avatar (2009) [tmdbid-19995].mkv"
+        assert movie.file_path.exists()
+        assert not (tmp_path / "pool" / "Filmy" / "Avatar (2009) [tmdbid-19995]").exists()
+
+    def test_removing_primary_migrates_metadata_to_survivor(self, file_manager, tmp_path):
+        (tmp_path / "a.mkv").write_bytes(b"2d")
+        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
+        movie.add_tag("Žánr/Sci-Fi")
+        movie.csfd_url = "https://www.csfd.cz/film/avatar/"
+        movie.attributes = {"collection_sort": "01"}
+        movie.save_metadata()
+        (tmp_path / "b.mkv").write_bytes(b"3d")
+        v2 = file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D")
+
+        file_manager.remove_movie_version(movie)  # remove the primary
+
+        assert v2.title == "Avatar"
+        assert v2.csfd_url == "https://www.csfd.cz/film/avatar/"
+        assert v2.attributes == {"collection_sort": "01"}
+        assert {t.full_path for t in v2.tags} == {"Žánr/Sci-Fi"}
+        assert not file_manager.is_movie_group_member(v2)  # demoted, only one left
+
+    def test_remove_version_rejects_ungrouped_movie(self, file_manager, tmp_path):
+        (tmp_path / "a.mkv").write_bytes(b"x")
+        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
+        with pytest.raises(ValueError):
+            file_manager.remove_movie_version(movie)
+
+    def test_rename_movie_refuses_grouped_movie(self, file_manager, tmp_path):
+        (tmp_path / "a.mkv").write_bytes(b"2d")
+        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
+        (tmp_path / "b.mkv").write_bytes(b"3d")
+        file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D")
+
+        with pytest.raises(ValueError):
+            file_manager.rename_movie(movie, "Avatar Reloaded")
+
+    def test_move_to_library_refuses_grouped_movie(self, file_manager, tmp_path):
+        file_manager.set_movie_libraries(["Filmy", "Kids"])
+        (tmp_path / "a.mkv").write_bytes(b"2d")
+        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
+        (tmp_path / "b.mkv").write_bytes(b"3d")
+        file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D")
+
+        with pytest.raises(ValueError):
+            file_manager.move_to_library(movie, "Kids")
+
+    def test_apply_movie_edits_refuses_rename_of_grouped_movie(self, file_manager, tmp_path):
+        (tmp_path / "a.mkv").write_bytes(b"2d")
+        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
+        (tmp_path / "b.mkv").write_bytes(b"3d")
+        file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D")
+
+        with pytest.raises(ValueError):
+            file_manager.apply_movie_edits(movie, title="Avatar Reloaded", year=2009, tmdb_id=19995)
+
+    def test_apply_movie_edits_allows_metadata_only_edit_of_grouped_movie(
+        self, file_manager, tmp_path
+    ):
+        """Same title/year/tmdb_id → no path change → date/tags/etc still work."""
+        (tmp_path / "a.mkv").write_bytes(b"2d")
+        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
+        (tmp_path / "b.mkv").write_bytes(b"3d")
+        file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D")
+
+        file_manager.apply_movie_edits(
+            movie, title="Avatar", year=2009, tmdb_id=19995, date="2026-01-01")
+
+        assert movie.date == "2026-01-01"
+        assert file_manager.is_movie_group_member(movie)
+
+    def test_rename_to_canonical_skips_grouped_movie(self, file_manager, tmp_path):
+        (tmp_path / "a.mkv").write_bytes(b"2d")
+        movie = file_manager.import_movie(tmp_path / "a.mkv", "Avatar", year=2009, tmdb_id=19995)
+        (tmp_path / "b.mkv").write_bytes(b"3d")
+        file_manager.add_movie_version(movie, tmp_path / "b.mkv", "3D")
+
+        movie.title = "Avatar Retitled"
+        assert file_manager.rename_to_canonical(movie) is None
+        assert movie.title == "Avatar Retitled"  # metadata field unaffected
+        assert file_manager.is_movie_group_member(movie)  # file untouched

tests/test_hardlink_manager.py

@@ -942,3 +942,30 @@ class TestMirrorAsIs:
         """Neexistující zdroj nic neudělá"""
         manager = HardlinkManager(tmp_path / "out")
         assert manager.mirror_as_is(tmp_path / "missing", "Seriály") == (0, 0)
+
+
+class TestRemoveMirror:
+    """Removing a whole mirrored library (or one bucket entry) from the output."""
+
+    def test_removes_a_whole_mirrored_folder(self, tmp_path):
+        output = tmp_path / "out"
+        (output / "Dokumenty" / "sub").mkdir(parents=True)
+        (output / "Dokumenty" / "sub" / "clip.mp4").write_bytes(b"x")
+        manager = HardlinkManager(output)
+
+        assert manager.remove_mirror("Dokumenty") is True
+        assert not (output / "Dokumenty").exists()
+
+    def test_removes_one_bucket_entry_by_compound_name(self, tmp_path):
+        output = tmp_path / "out"
+        (output / "Seriály" / "Show A").mkdir(parents=True)
+        (output / "Seriály" / "Show B").mkdir(parents=True)
+        manager = HardlinkManager(output)
+
+        assert manager.remove_mirror("Seriály/Show A") is True
+        assert not (output / "Seriály" / "Show A").exists()
+        assert (output / "Seriály" / "Show B").exists()  # sibling untouched
+
+    def test_missing_target_returns_false(self, tmp_path):
+        manager = HardlinkManager(tmp_path / "out")
+        assert manager.remove_mirror("Nope") is False

tests/test_legacy_meta.py

@@ -0,0 +1,104 @@
+"""Tests for recovering ČSFD link / title / year from pre-index layouts."""
+import json
+
+from src.core.legacy_meta import LegacyMeta, read_legacy_meta
+
+
+def _video(tmp_path, name="Matrix (1999).mkv"):
+    v = tmp_path / name
+    v.write_bytes(b"x")
+    return v
+
+
+def test_reads_tagger_era_sidecar(tmp_path):
+    video = _video(tmp_path)
+    (tmp_path / f".{video.name}.!tag").write_text(json.dumps({
+        "title": "Matrix",
+        "csfd_link": "https://www.csfd.cz/film/9499-matrix/",
+        "csfd_cache": {"year": 1999, "rating": 90},
+    }), encoding="utf-8")
+
+    meta = read_legacy_meta(video)
+    assert meta == LegacyMeta(
+        csfd_url="https://www.csfd.cz/film/9499-matrix/",
+        title="Matrix", year="1999", source="sidecar")
+
+
+def test_sidecar_new_key_and_meta_block(tmp_path):
+    video = _video(tmp_path)
+    (tmp_path / f".{video.name}.!tag").write_text(json.dumps({
+        "title": "Matrix",
+        "csfd_url": "https://www.csfd.cz/film/9499/",
+        "meta": {"year": "1999"},
+    }), encoding="utf-8")
+
+    meta = read_legacy_meta(video)
+    assert meta.csfd_url == "https://www.csfd.cz/film/9499/"
+    assert meta.year == "1999"
+
+
+def test_reads_old_pool_index_by_relative_key(tmp_path):
+    pool = tmp_path / "old-pool"
+    movies_dir = pool / "Filmy"
+    movies_dir.mkdir(parents=True)
+    video = _video(movies_dir)
+    (pool / ".Curator.!index").write_text(json.dumps({
+        "settings": {},
+        "movies": {
+            "Filmy/Matrix (1999).mkv": {
+                "title": "Matrix",
+                "csfd_link": "https://www.csfd.cz/film/9499-matrix/",
+                "csfd_cache": {"year": 1999},
+            }
+        },
+    }), encoding="utf-8")
+
+    meta = read_legacy_meta(video)
+    assert meta.csfd_url == "https://www.csfd.cz/film/9499-matrix/"
+    assert meta.title == "Matrix"
+    assert meta.year == "1999"
+    assert meta.source == "index"
+
+
+def test_index_fallback_to_unique_basename_match(tmp_path):
+    pool = tmp_path / "pool"
+    pool.mkdir()
+    elsewhere = tmp_path / "loose"
+    elsewhere.mkdir()
+    video = _video(elsewhere)
+    (pool.parent / ".Curator.!index").write_text(json.dumps({
+        "movies": {"whatever/Matrix (1999).mkv": {
+            "csfd_url": "https://www.csfd.cz/film/9499/"}},
+    }), encoding="utf-8")
+
+    meta = read_legacy_meta(video)
+    assert meta is not None
+    assert meta.csfd_url == "https://www.csfd.cz/film/9499/"
+
+
+def test_sidecar_wins_over_index(tmp_path):
+    video = _video(tmp_path)
+    (tmp_path / f".{video.name}.!tag").write_text(
+        json.dumps({"csfd_link": "https://www.csfd.cz/film/SIDECAR/"}), encoding="utf-8")
+    (tmp_path / ".Curator.!index").write_text(json.dumps({
+        "movies": {"Matrix (1999).mkv": {"csfd_link": "https://www.csfd.cz/film/INDEX/"}},
+    }), encoding="utf-8")
+
+    assert read_legacy_meta(video).csfd_url == "https://www.csfd.cz/film/SIDECAR/"
+
+
+def test_none_when_no_metadata(tmp_path):
+    assert read_legacy_meta(_video(tmp_path)) is None
+
+
+def test_none_on_broken_sidecar(tmp_path):
+    video = _video(tmp_path)
+    (tmp_path / f".{video.name}.!tag").write_text("{not json", encoding="utf-8")
+    assert read_legacy_meta(video) is None
+
+
+def test_record_without_useful_fields_is_none(tmp_path):
+    video = _video(tmp_path)
+    (tmp_path / f".{video.name}.!tag").write_text(
+        json.dumps({"new": True, "ignored": False, "tags": []}), encoding="utf-8")
+    assert read_legacy_meta(video) is None

tests/test_movie.py

@@ -0,0 +1,155 @@
+"""Tests for the movie object and the pool layout it derives (src.core.movie)."""
+from pathlib import Path
+
+import pytest
+
+from src.core.movie import (
+    DEFAULT_VERSION_LABEL,
+    MediaFile,
+    Movie,
+    identity_key,
+    media_filename,
+    normalize_3d_label,
+)
+
+
+@pytest.mark.parametrize("label,expected", [
+    ("HSBS", "HSBS"), ("hsbs", "HSBS"), ("3D HSBS", "HSBS"),
+    ("3d.hsbs", "HSBS"), ("3D_FTAB", "FTAB"), ("3d-mvc", "MVC"),
+    ("4K", None), ("Director's Cut", None), ("", None), (None, None),
+])
+def test_normalize_3d_label(label, expected):
+    assert normalize_3d_label(label) == expected
+
+
+class TestMediaFilename:
+    def test_no_label_is_the_bare_stem(self):
+        assert media_filename("Matrix (1999)", "", ".mkv", grouped=False) == \
+            "Matrix (1999).mkv"
+
+    def test_3d_label_uses_jellyfins_documented_form(self):
+        assert media_filename("Avatar (2009)", "3D HSBS", ".mkv", grouped=False) == \
+            "Avatar (2009).3D.HSBS.mkv"
+        # same spelling grouped — "." is a valid separator after the folder name
+        assert media_filename("Avatar (2009)", "hsbs", ".mkv", grouped=True) == \
+            "Avatar (2009).3D.HSBS.mkv"
+
+    def test_plain_label_uses_dash_form(self):
+        assert media_filename("Avatar (2009)", "4K", ".mkv", grouped=True) == \
+            "Avatar (2009) - 4K.mkv"
+
+    def test_grouped_empty_label_gets_a_default(self):
+        assert media_filename("Avatar (2009)", "", ".mkv", grouped=True) == \
+            f"Avatar (2009) - {DEFAULT_VERSION_LABEL}.mkv"
+
+
+class TestIdentityKey:
+    def test_tmdb_id_wins(self):
+        assert identity_key(603, "Matrix", "1999") == "tmdb-603"
+        assert identity_key("603", "cokoli", None) == "tmdb-603"
+
+    def test_slug_fallback_without_id(self):
+        assert identity_key(None, "Matrix", "1999") == "name-matrix-1999"
+
+    def test_slug_folds_diacritics(self):
+        assert identity_key(None, "Pelíšky", "1999") == "name-pelisky-1999"
+
+    def test_slug_without_year(self):
+        assert identity_key(None, "Nějaký film", None) == "name-nejaky-film"
+
+
+def _movie(**kwargs) -> Movie:
+    base = dict(key="tmdb-19995", title="Avatar", year="2009", tmdb_id=19995,
+                library="Filmy")
+    base.update(kwargs)
+    return Movie(**base)
+
+
+class TestMovieShape:
+    def test_stem_is_the_canonical_form(self):
+        assert _movie().stem == "Avatar (2009) [tmdbid-19995]"
+
+    def test_stem_falls_back_to_title_without_year(self):
+        assert _movie(year=None, tmdb_id=None).stem == "Avatar"
+
+    def test_single_video_is_not_grouped(self):
+        m = _movie(media=[MediaFile(Path("/pool/Filmy/x.mkv"))])
+        assert m.is_grouped is False
+
+    def test_two_videos_are_grouped(self):
+        m = _movie(media=[MediaFile(Path("/a.mkv"), "3D HSBS"),
+                          MediaFile(Path("/b.mkv"), "Výchozí")])
+        assert m.is_grouped is True
+
+    def test_primary_prefers_the_plain_version(self):
+        m = _movie(media=[MediaFile(Path("/a.mkv"), "3D HSBS"),
+                          MediaFile(Path("/b.mkv"), "")])
+        assert m.primary.label == ""
+
+
+class TestDesiredLayout:
+    def test_one_video_stays_flat_in_the_library(self, tmp_path):
+        m = _movie(media=[MediaFile(tmp_path / "kdekoli.mkv", "")])
+        (media, target), = m.desired_layout(tmp_path)
+        assert target == tmp_path / "Filmy" / "Avatar (2009) [tmdbid-19995].mkv"
+
+    def test_one_3d_video_keeps_the_3d_tag_flat(self, tmp_path):
+        m = _movie(media=[MediaFile(tmp_path / "x.mkv", "3D HSBS")])
+        (_m, target), = m.desired_layout(tmp_path)
+        assert target.name == "Avatar (2009) [tmdbid-19995].3D.HSBS.mkv"
+        assert target.parent == tmp_path / "Filmy"
+
+    def test_two_videos_move_into_the_movie_folder(self, tmp_path):
+        m = _movie(media=[MediaFile(tmp_path / "a.mkv", ""),
+                          MediaFile(tmp_path / "b.mkv", "3D HSBS")])
+        targets = {mf.label: path for mf, path in m.desired_layout(tmp_path)}
+        folder = tmp_path / "Filmy" / "Avatar (2009) [tmdbid-19995]"
+        assert targets[""] == folder / \
+            f"Avatar (2009) [tmdbid-19995] - {DEFAULT_VERSION_LABEL}.mkv"
+        assert targets["3D HSBS"] == folder / "Avatar (2009) [tmdbid-19995].3D.HSBS.mkv"
+
+    def test_layout_follows_a_retitle(self, tmp_path):
+        """Renaming the movie is just a different desired layout — the thing
+        that used to be impossible for a grouped movie."""
+        m = _movie(title="Avatar: Nová verze",
+                   media=[MediaFile(tmp_path / "a.mkv", "A"),
+                          MediaFile(tmp_path / "b.mkv", "B")])
+        folders = {path.parent for _mf, path in m.desired_layout(tmp_path)}
+        assert folders == {
+            tmp_path / "Filmy" / "Avatar: Nová verze (2009) [tmdbid-19995]"}
+
+    def test_layout_follows_a_library_move(self, tmp_path):
+        m = _movie(library="Kids", media=[MediaFile(tmp_path / "a.mkv", "")])
+        (_m, target), = m.desired_layout(tmp_path)
+        assert target.parent == tmp_path / "Kids"
+
+
+class TestRecordRoundTrip:
+    def test_to_and_from_record(self, tmp_path):
+        m = _movie(
+            media=[MediaFile(tmp_path / "Filmy" / "a.mkv", "3D HSBS")],
+            csfd_url="https://www.csfd.cz/film/1/", date="2026-01-01",
+            attributes={"collection_sort": "01"}, meta={"year": "2009"})
+
+        record = m.to_record(tmp_path)
+        assert record["media"] == [
+            {"role": "video", "label": "3D HSBS", "file": "Filmy/a.mkv"}]
+
+        back = Movie.from_record("tmdb-19995", record, tmp_path)
+        assert back.title == "Avatar"
+        assert back.year == "2009"
+        assert back.tmdb_id == 19995
+        assert back.library == "Filmy"
+        assert back.csfd_url == "https://www.csfd.cz/film/1/"
+        assert back.attributes == {"collection_sort": "01"}
+        assert back.meta == {"year": "2009"}
+        assert back.media[0].path == tmp_path / "Filmy" / "a.mkv"
+        assert back.media[0].format_3d == "HSBS"
+
+    def test_from_record_builds_tags_via_tagmanager(self, tmp_path):
+        from src.core.tag_manager import TagManager
+        record = {"title": "Avatar", "media": [], "tags": ["Žánr/Sci-Fi"]}
+
+        back = Movie.from_record("tmdb-19995", record, tmp_path, TagManager())
+
+        assert {t.full_path for t in back.tags} == {"Žánr/Sci-Fi"}

tests/test_naming.py

@@ -2,9 +2,11 @@
 import pytest
 
 from src.core.naming import (
+    THREE_D_FORMATS,
     canonical_pool_stem,
     is_canonical_pool_stem,
     is_valid_year,
+    parse_3d_format,
     parse_pool_stem,
     parse_tmdb_id,
     year_from_filename,
@@ -79,6 +81,43 @@ def test_is_canonical_pool_stem():
     assert not is_canonical_pool_stem("Matrix")
 
 
+def test_canonical_pool_stem_with_3d_format():
+    assert canonical_pool_stem("Avatar", 2009, 19995, "hsbs") == \
+        "Avatar (2009) [tmdbid-19995].3D.HSBS"
+    # upper-cased regardless of input case
+    assert canonical_pool_stem("Avatar", 2009, None, "fsbs") == "Avatar (2009).3D.FSBS"
+    # empty/None → no tag at all
+    assert canonical_pool_stem("Avatar", 2009, None, None) == "Avatar (2009)"
+    assert canonical_pool_stem("Avatar", 2009, None, "") == "Avatar (2009)"
+
+
+def test_canonical_pool_stem_rejects_bad_3d_format():
+    with pytest.raises(ValueError):
+        canonical_pool_stem("Avatar", 2009, None, "bogus")
+
+
+@pytest.mark.parametrize("fmt", THREE_D_FORMATS)
+def test_parse_3d_format_roundtrip(fmt):
+    stem = canonical_pool_stem("Avatar", 2009, 19995, fmt)
+    assert parse_3d_format(stem) == fmt
+    assert parse_pool_stem(stem) == ("Avatar", 2009)
+    assert parse_tmdb_id(stem) == 19995
+
+
+def test_parse_3d_format_case_insensitive_on_read():
+    assert parse_3d_format("Avatar (2009).3D.hsbs") == "HSBS"
+
+
+def test_parse_3d_format_absent_is_none():
+    assert parse_3d_format("Avatar (2009) [tmdbid-19995]") is None
+    assert parse_3d_format("Avatar (2009)") is None
+
+
+def test_canonical_pool_stem_3d_without_tmdb_id():
+    assert canonical_pool_stem("Avatar", 2009, None, "MVC") == "Avatar (2009).3D.MVC"
+    assert parse_3d_format("Avatar (2009).3D.MVC") == "MVC"
+
+
 @pytest.mark.parametrize("name,year", [
     ("Matrix.1999.1080p.BluRay.mkv", "1999"),
     ("Šíleně smutná princezna (1968).mkv", "1968"),

tests/test_nfo.py

@@ -52,6 +52,35 @@ def test_tmdbid_from_tmdbid_tag(tmp_path):
     assert read_nfo(video).tmdb_id == 603
 
 
+def test_csfd_url_from_uniqueid_bare_id(tmp_path):
+    video = _movie(tmp_path)
+    video.with_suffix(".nfo").write_text(
+        '<movie><uniqueid type="csfd">9499</uniqueid></movie>', encoding="utf-8")
+    assert read_nfo(video).csfd_url == "https://www.csfd.cz/film/9499/"
+
+
+def test_csfd_url_from_uniqueid_full_url(tmp_path):
+    video = _movie(tmp_path)
+    video.with_suffix(".nfo").write_text(
+        '<movie><uniqueid type="csfd">https://www.csfd.cz/film/9499-matrix/'
+        '</uniqueid></movie>', encoding="utf-8")
+    assert read_nfo(video).csfd_url == "https://www.csfd.cz/film/9499-matrix/"
+
+
+def test_csfd_url_from_legacy_csfdid_tag(tmp_path):
+    video = _movie(tmp_path)
+    video.with_suffix(".nfo").write_text(
+        "<movie><csfdid>12345</csfdid></movie>", encoding="utf-8")
+    assert read_nfo(video).csfd_url == "https://www.csfd.cz/film/12345/"
+
+
+def test_csfd_url_absent_is_none(tmp_path):
+    video = _movie(tmp_path)
+    video.with_suffix(".nfo").write_text(
+        "<movie><title>Matrix</title></movie>", encoding="utf-8")
+    assert read_nfo(video).csfd_url is None
+
+
 def test_find_prefers_sibling_over_movie_nfo(tmp_path):
     folder = tmp_path / "Matrix (1999)"
     folder.mkdir()

tests/test_pool_index.py

@@ -1,48 +1,68 @@
 import json
 
-from src.core.pool_index import PoolIndex, INDEX_FILENAME
+from src.core.pool_index import PoolIndex, INDEX_FILENAME, INDEX_VERSION
 from src.core.file import File
 from src.core.tag_manager import TagManager
 
 
 class TestPoolIndex:
-    """Testy pro unifikovaný metadata index poolu"""
+    """Testy pro unifikovaný metadata index poolu (v2 — klíč = identita filmu)"""
 
     def test_empty_index_when_no_file(self, tmp_path):
         index = PoolIndex(tmp_path)
         assert index.records == {}
-        assert index.get(tmp_path / "Filmy" / "x.mkv") is None
+        assert index.get_movie("tmdb-603") is None
 
-    def test_set_and_get_by_relative_key(self, tmp_path):
+    def test_set_and_get_movie_by_identity(self, tmp_path):
         index = PoolIndex(tmp_path)
-        path = tmp_path / "Filmy" / "Matrix.mkv"
+        index.set_movie("tmdb-603", {"title": "Matrix", "media": []})
-        index.set(path, {"title": "Matrix"})
 
-        assert index.get(path) == {"title": "Matrix"}
+        assert index.get_movie("tmdb-603") == {"title": "Matrix", "media": []}
-        # key is the pool-relative POSIX path
+        assert "tmdb-603" in index.records
-        assert "Filmy/Matrix.mkv" in index.records
 
-    def test_set_persists_to_disk(self, tmp_path):
+    def test_set_persists_to_disk_with_version(self, tmp_path):
         index = PoolIndex(tmp_path)
-        index.set(tmp_path / "Filmy" / "A.mkv", {"title": "A"})
+        index.set_movie("tmdb-603", {"title": "Matrix", "media": []})
 
         on_disk = json.loads((tmp_path / INDEX_FILENAME).read_text(encoding="utf-8"))
-        assert on_disk["movies"]["Filmy/A.mkv"]["title"] == "A"
+        assert on_disk["version"] == INDEX_VERSION
+        assert on_disk["movies"]["tmdb-603"]["title"] == "Matrix"
 
     def test_reload_reads_existing_index(self, tmp_path):
-        PoolIndex(tmp_path).set(tmp_path / "Filmy" / "A.mkv", {"title": "A"})
+        PoolIndex(tmp_path).set_movie("tmdb-603", {"title": "Matrix", "media": []})
 
         reloaded = PoolIndex(tmp_path)
-        assert reloaded.get(tmp_path / "Filmy" / "A.mkv") == {"title": "A"}
+        assert reloaded.get_movie("tmdb-603")["title"] == "Matrix"
 
-    def test_delete_removes_record(self, tmp_path):
+    def test_delete_movie_removes_record(self, tmp_path):
         index = PoolIndex(tmp_path)
-        path = tmp_path / "Filmy" / "A.mkv"
+        index.set_movie("tmdb-603", {"title": "Matrix", "media": []})
-        index.set(path, {"title": "A"})
+        index.delete_movie("tmdb-603")
-        index.delete(path)
 
-        assert index.get(path) is None
+        assert index.get_movie("tmdb-603") is None
-        assert PoolIndex(tmp_path).get(path) is None
+        assert PoolIndex(tmp_path).get_movie("tmdb-603") is None
+
+    def test_rekey_movie(self, tmp_path):
+        index = PoolIndex(tmp_path)
+        index.set_movie("name-matrix-1999", {"title": "Matrix", "media": []})
+
+        index.rekey_movie("name-matrix-1999", "tmdb-603")
+
+        assert index.get_movie("name-matrix-1999") is None
+        assert index.get_movie("tmdb-603")["title"] == "Matrix"
+
+    def test_find_movie_by_media(self, tmp_path):
+        index = PoolIndex(tmp_path)
+        index.set_movie("tmdb-603", {
+            "title": "Matrix",
+            "media": [{"role": "video", "label": "", "file": "Filmy/Matrix.mkv"}]})
+
+        found = index.find_movie_by_media(tmp_path / "Filmy" / "Matrix.mkv")
+        assert found is not None
+        key, record = found
+        assert key == "tmdb-603"
+        assert record["title"] == "Matrix"
+        assert index.find_movie_by_media(tmp_path / "Filmy" / "Jiny.mkv") is None
 
     def test_corrupt_index_loads_empty(self, tmp_path):
         (tmp_path / INDEX_FILENAME).write_text("{ not json", encoding="utf-8")
@@ -50,8 +70,89 @@ class TestPoolIndex:
         assert index.records == {}
 
 
+class TestV1Migration:
+    """Starý path-klíčovaný index se převede na identity-klíčovaný (bez hýbání soubory)"""
+
+    def _write_v1(self, tmp_path, movies: dict) -> None:
+        (tmp_path / INDEX_FILENAME).write_text(
+            json.dumps({"settings": {"tag_schema": []}, "movies": movies}),
+            encoding="utf-8")
+
+    def test_flat_movie_becomes_identity_keyed_record(self, tmp_path):
+        self._write_v1(tmp_path, {
+            "Filmy/Matrix (1999) [tmdbid-603].mkv": {
+                "title": "Matrix", "tags": ["Žánr/Akční"],
+                "csfd_url": "https://www.csfd.cz/film/9499/",
+                "date": "1999-03-31", "added": "2026-01-01T00:00:00",
+                "attributes": {"collection_sort": "01"},
+            }})
+
+        index = PoolIndex(tmp_path)
+
+        record = index.get_movie("tmdb-603")
+        assert record is not None
+        assert record["title"] == "Matrix"
+        assert record["year"] == "1999"
+        assert record["tmdb_id"] == 603
+        assert record["library"] == "Filmy"
+        assert record["media"] == [
+            {"role": "video", "label": "",
+             "file": "Filmy/Matrix (1999) [tmdbid-603].mkv"}]
+        assert record["tags"] == ["Žánr/Akční"]
+        assert record["csfd_url"] == "https://www.csfd.cz/film/9499/"
+        assert record["attributes"] == {"collection_sort": "01"}
+
+    def test_grouped_versions_merge_into_one_record(self, tmp_path):
+        base = "Filmy/Avatar (2009) [tmdbid-19995]"
+        self._write_v1(tmp_path, {
+            f"{base}/Avatar (2009) [tmdbid-19995] - Výchozí.mkv": {"title": "Avatar"},
+            f"{base}/Avatar (2009) [tmdbid-19995] - 3D HSBS.mkv": {"title": "Avatar"},
+        })
+
+        index = PoolIndex(tmp_path)
+
+        assert len(index.all_movies()) == 1
+        record = index.get_movie("tmdb-19995")
+        assert {m["label"] for m in record["media"]} == {"Výchozí", "3D HSBS"}
+        assert record["library"] == "Filmy"
+
+    def test_movie_without_tmdbid_gets_slug_key(self, tmp_path):
+        self._write_v1(tmp_path, {
+            "Filmy/Pelíšky (1999).mkv": {"title": "Pelíšky"}})
+
+        index = PoolIndex(tmp_path)
+
+        assert index.get_movie("name-pelisky-1999") is not None
+
+    def test_migration_backs_up_and_bumps_version(self, tmp_path):
+        self._write_v1(tmp_path, {"Filmy/A (2000).mkv": {"title": "A"}})
+
+        PoolIndex(tmp_path)
+
+        backup = tmp_path / (INDEX_FILENAME + ".v1.bak")
+        assert backup.exists()
+        assert "Filmy/A (2000).mkv" in json.loads(backup.read_text(encoding="utf-8"))["movies"]
+        on_disk = json.loads((tmp_path / INDEX_FILENAME).read_text(encoding="utf-8"))
+        assert on_disk["version"] == INDEX_VERSION
+
+    def test_migration_keeps_settings(self, tmp_path):
+        self._write_v1(tmp_path, {"Filmy/A (2000).mkv": {"title": "A"}})
+        index = PoolIndex(tmp_path)
+        assert index.get_setting("tag_schema") == []
+
+    def test_v2_index_is_not_migrated_again(self, tmp_path):
+        (tmp_path / INDEX_FILENAME).write_text(json.dumps({
+            "version": INDEX_VERSION, "settings": {},
+            "movies": {"tmdb-1": {"title": "X", "media": []}}}), encoding="utf-8")
+
+        index = PoolIndex(tmp_path)
+
+        assert index.get_movie("tmdb-1")["title"] == "X"
+        assert not (tmp_path / (INDEX_FILENAME + ".v1.bak")).exists()
+
+
 class TestFileWithIndex:
-    """File používá index místo sidecar souboru, je-li injektován"""
+    """File je pohled na jeden media záznam filmu v indexu"""
 
     def test_index_backed_file_writes_no_sidecar(self, tmp_path):
         index = PoolIndex(tmp_path)
@@ -62,7 +163,7 @@ class TestFileWithIndex:
         f = File(movie, TagManager(), index=index)
 
         assert not (movie.parent / ".Matrix.mkv.!tag").exists()  # no sidecar
-        assert index.get(movie) is not None  # record created in index
+        assert index.find_movie_by_media(movie) is not None  # record created
         assert f.tags == []  # no automatic tags
 
     def test_index_backed_metadata_persists_across_reload(self, tmp_path):
@@ -94,4 +195,24 @@ class TestFileWithIndex:
 
         f = File(movie, TagManager(), index=index)
         f.delete_metadata()
-        assert index.get(movie) is None
+        assert index.find_movie_by_media(movie) is None
+
+    def test_two_versions_share_one_movie_record(self, tmp_path):
+        """Obě verze čtou stejná metadata — to je smysl identity klíče."""
+        index = PoolIndex(tmp_path)
+        folder = tmp_path / "Filmy" / "Avatar (2009) [tmdbid-19995]"
+        folder.mkdir(parents=True)
+        a = folder / "Avatar (2009) [tmdbid-19995] - Výchozí.mkv"
+        b = folder / "Avatar (2009) [tmdbid-19995] - 3D HSBS.mkv"
+        a.write_bytes(b"x")
+        b.write_bytes(b"y")
+
+        tm = TagManager()
+        fa = File(a, tm, index=index)
+        fa.title = "Avatar"
+        fa.add_tag("Žánr/Sci-Fi")
+        fb = File(b, tm, index=index)
+
+        assert len(index.all_movies()) == 1
+        assert fb.title == "Avatar"
+        assert "Žánr/Sci-Fi" in {t.full_path for t in fb.tags}

tests/test_series.py

@@ -2,9 +2,12 @@
 import pytest
 
 from src.core.series import (
+    collect_episode_files,
     episode_filename,
     is_canonical_episode,
+    is_season_folder,
     parse_episode,
+    sanitize_title,
     scan_series,
     season_folder_name,
     series_folder_stem,
@@ -29,13 +32,29 @@ def test_season_folder_name():
     assert season_folder_name(12) == "Season 12"
 
 
-def test_episode_filename_keeps_original_name():
+def test_episode_filename_is_code_plus_series_title():
-    assert episode_filename(1, 2, "bb.pilot.hdtv", ".mkv") == "S01E02 - bb.pilot.hdtv.mkv"
+    assert episode_filename(1, 2, "Most!", ".mkv") == "S01E02 - Most!.mkv"
-    # already-canonical stem → no doubled prefix
+    assert episode_filename(0, 3, "Most!", ".mkv") == "S00E03 - Most!.mkv"
-    assert episode_filename(1, 2, "S01E02 - bb.pilot.hdtv", ".mkv") == \
+    # release string is NOT kept — only the code + series title
-        "S01E02 - bb.pilot.hdtv.mkv"
+    assert episode_filename(12, 145, "Breaking Bad", ".mkv") == \
-    # stem that was only the code → collapses to just the code
+        "S12E145 - Breaking Bad.mkv"
-    assert episode_filename(3, 4, "S03E04", ".mkv") == "S03E04.mkv"
+    # empty / unusable title → just the code
+    assert episode_filename(3, 4, "", ".mkv") == "S03E04.mkv"
+    assert episode_filename(3, 4, "/", ".mkv") == "S03E04.mkv"
+
+
+def test_sanitize_title():
+    assert sanitize_title("Most!") == "Most!"
+    assert sanitize_title('A: B / C  D') == "A B C D"
+    assert sanitize_title("  trailing. ") == "trailing"
+
+
+def test_is_season_folder():
+    assert is_season_folder("Season 01")
+    assert is_season_folder("Season 1")
+    assert is_season_folder("Specials")
+    assert not is_season_folder("Extras")
+    assert not is_season_folder("Season")
 
 
 def test_series_folder_stem():
@@ -47,12 +66,15 @@ def test_series_folder_stem():
 def test_is_canonical_episode(tmp_path):
     folder = tmp_path / "Breaking Bad (2008) [tmdbid-1396]" / "Season 01"
     folder.mkdir(parents=True)
-    good = folder / "S01E02 - bb.pilot.mkv"
+    good = folder / "S01E02 - Breaking Bad.mkv"
     good.write_bytes(b"x")
     bad = folder / "bb.s01e02.mkv"
     bad.write_bytes(b"x")
-    assert is_canonical_episode(good)
+    wrong_body = folder / "S01E02 - old release.mkv"
-    assert not is_canonical_episode(bad)
+    wrong_body.write_bytes(b"x")
+    assert is_canonical_episode(good, "Breaking Bad")
+    assert not is_canonical_episode(bad, "Breaking Bad")
+    assert not is_canonical_episode(wrong_body, "Breaking Bad")
 
 
 def test_scan_series(tmp_path):
@@ -73,6 +95,26 @@ def test_scan_series(tmp_path):
     assert list(seasons.keys()) == [1] and len(seasons[1]) == 2
 
 
+def test_collect_episode_files_walks_subfolders(tmp_path):
+    root = tmp_path / "Breaking.Bad.COMPLETE"
+    (root / "Season 01").mkdir(parents=True)
+    (root / "Season 02").mkdir(parents=True)
+    (root / "Season 01" / "BB S01E01.mkv").write_bytes(b"x")
+    (root / "Season 01" / "BB S01E02.mkv").write_bytes(b"x")
+    (root / "Season 01" / "BB S01E02.srt").write_bytes(b"x")   # sidecar → skipped
+    (root / "Season 02" / "BB S02E01.avi").write_bytes(b"x")
+    (root / "readme.nfo").write_bytes(b"x")                    # sidecar → skipped
+
+    files = collect_episode_files(root)
+
+    assert [f.name for f in files] == [
+        "BB S01E01.mkv", "BB S01E02.mkv", "BB S02E01.avi"]
+
+
+def test_collect_episode_files_missing_folder_is_empty(tmp_path):
+    assert collect_episode_files(tmp_path / "nope") == []
+
+
 class TestFileManagerSeries:
     @pytest.fixture
     def file_manager(self, tmp_path, monkeypatch):
@@ -94,8 +136,8 @@ class TestFileManagerSeries:
         assert result["imported"] == 2
         base = (tmp_path / "pool" / "Seriály"
                 / "Breaking Bad (2008) [tmdbid-1396]" / "Season 01")
-        assert (base / "S01E01 - bb.mkv").exists()
+        assert (base / "S01E01 - Breaking Bad.mkv").exists()
-        assert (base / "S01E02 - bb.mkv").exists()
+        assert (base / "S01E02 - Breaking Bad.mkv").exists()
 
     def test_import_episodes_into_mixed_library(self, file_manager, tmp_path):
         file_manager.set_libraries([{"name": "Hlavní", "kind": "mixed"}])
@@ -106,7 +148,7 @@ class TestFileManagerSeries:
 
         assert result["imported"] == 1
         assert (tmp_path / "pool" / "Hlavní" / "Breaking Bad (2008) [tmdbid-1396]"
-                / "Season 01" / "S01E01 - bb.mkv").exists()
+                / "Season 01" / "S01E01 - Breaking Bad.mkv").exists()
         # a mixed library is scanned for series too
         found = file_manager.load_series()
         assert [s.title for s in found] == ["Breaking Bad"]
@@ -118,6 +160,45 @@ class TestFileManagerSeries:
         assert result["imported"] == 0
         assert result["skipped_no_code"] == ["random.mkv"]
 
+    def test_remove_series_deletes_the_folder(self, file_manager, tmp_path):
+        (tmp_path / "bb.S01E01.mkv").write_bytes(b"x")
+        (tmp_path / "bb.S02E01.mkv").write_bytes(b"x")
+        file_manager.import_episodes(
+            [tmp_path / "bb.S01E01.mkv", tmp_path / "bb.S02E01.mkv"],
+            "Breaking Bad", year=2008, tmdb_id=1396)
+        (ser,) = file_manager.load_series()
+        assert ser.folder.is_dir()
+
+        file_manager.remove_series(ser)
+
+        assert not ser.folder.exists()
+        assert file_manager.load_series() == []
+
+    def test_remove_series_refuses_folder_outside_pool(self, file_manager, tmp_path):
+        from src.core.series import Series
+        outside = tmp_path / "not-the-pool" / "Show (2020)"
+        outside.mkdir(parents=True)
+        bogus = Series(outside, "Show", "2020", None, "Seriály")
+        with pytest.raises(ValueError):
+            file_manager.remove_series(bogus)
+        assert outside.is_dir()  # untouched
+
+    def test_import_episodes_uses_explicit_codes_override(self, file_manager, tmp_path):
+        uncoded = tmp_path / "pilot.mkv"
+        uncoded.write_bytes(b"x")
+        misparsed = tmp_path / "bb 2008 e07.mkv"  # "2008" would parse as 20x08
+        misparsed.write_bytes(b"x")
+        result = file_manager.import_episodes(
+            [uncoded, misparsed], "Breaking Bad", year=2008, tmdb_id=1396,
+            codes={uncoded: (1, 1), misparsed: (1, 7)})
+
+        assert result["imported"] == 2
+        base = (tmp_path / "pool" / "Seriály"
+                / "Breaking Bad (2008) [tmdbid-1396]" / "Season 01")
+        assert (base / "S01E01 - Breaking Bad.mkv").exists()
+        assert (base / "S01E07 - Breaking Bad.mkv").exists()
+        assert result["skipped_no_code"] == []
+
     def test_rename_episodes_to_canonical(self, file_manager, tmp_path):
         # a mis-named episode sitting in the wrong place
         folder = (tmp_path / "pool" / "Seriály"
@@ -129,8 +210,49 @@ class TestFileManagerSeries:
         assert len(series_list) == 1
         result = file_manager.rename_episodes_to_canonical(series_list[0])
 
-        assert result["renamed"] == [("bb.1x03.HDTV.mkv", "S01E03 - bb.HDTV.mkv")]
+        assert result["renamed"] == [("bb.1x03.HDTV.mkv", "S01E03 - Breaking Bad.mkv")]
-        assert (folder / "Season 01" / "S01E03 - bb.HDTV.mkv").exists()
+        assert (folder / "Season 01" / "S01E03 - Breaking Bad.mkv").exists()
+
+    def test_rename_episodes_to_canonical_carries_subtitle_along(
+        self, file_manager, tmp_path
+    ):
+        folder = (tmp_path / "pool" / "Seriály"
+                  / "Breaking Bad (2008) [tmdbid-1396]")
+        folder.mkdir(parents=True)
+        (folder / "bb.1x03.HDTV.mkv").write_bytes(b"x")
+        (folder / "bb.1x03.HDTV.cs.srt").write_bytes(b"x")
+
+        result = file_manager.rename_episodes_to_canonical(file_manager.load_series()[0])
+
+        assert result["renamed"] == [("bb.1x03.HDTV.mkv", "S01E03 - Breaking Bad.mkv")]
+        assert (folder / "Season 01" / "S01E03 - Breaking Bad.cs.srt").exists()
+        assert not (folder / "bb.1x03.HDTV.cs.srt").exists()
+
+    def test_rename_all_series_to_canonical_bulk(self, file_manager, tmp_path):
+        seri = tmp_path / "pool" / "Seriály"
+        # series A: mis-named episodes in a non-padded season folder
+        (seri / "Fargo (2014) [tmdbid-60622]" / "Season 1").mkdir(parents=True)
+        (seri / "Fargo (2014) [tmdbid-60622]" / "Season 1"
+         / "fargo.1x01.1080p.WEB.mkv").write_bytes(b"x")
+        # series B: one good, one without a code
+        (seri / "Most! (2019) [tmdbid-90000]" / "Season 01").mkdir(parents=True)
+        (seri / "Most! (2019) [tmdbid-90000]" / "Season 01"
+         / "S01E02 - Most!.mkv").write_bytes(b"x")
+        (seri / "Most! (2019) [tmdbid-90000]" / "Season 01"
+         / "necoZvlastniho.mkv").write_bytes(b"x")
+
+        result = file_manager.rename_all_series_to_canonical()
+
+        assert result["series"] == 2
+        assert ("Fargo", "fargo.1x01.1080p.WEB.mkv", "S01E01 - Fargo.mkv") in result["renamed"]
+        assert (seri / "Fargo (2014) [tmdbid-60622]" / "Season 01"
+                / "S01E01 - Fargo.mkv").exists()
+        # emptied non-padded season folder swept
+        assert not (seri / "Fargo (2014) [tmdbid-60622]" / "Season 1").exists()
+        # the already-canonical one is untouched, the code-less one is reported
+        assert ("Most!", "necoZvlastniho.mkv") in result["skipped_no_code"]
+        assert (seri / "Most! (2019) [tmdbid-90000]" / "Season 01"
+                / "S01E02 - Most!.mkv").exists()
 
     def test_apply_series_edits_renames_folder_and_episodes(self, file_manager, tmp_path):
         folder = tmp_path / "pool" / "Seriály" / "Wrong Name"
@@ -144,5 +266,5 @@ class TestFileManagerSeries:
         new_folder = (tmp_path / "pool" / "Seriály"
                       / "Breaking Bad (2008) [tmdbid-1396]")
         assert result["folder"] == new_folder
-        assert (new_folder / "Season 01" / "S01E01 - old.mkv").exists()
+        assert (new_folder / "Season 01" / "S01E01 - Breaking Bad.mkv").exists()
         assert not folder.exists()

tests/test_subtitles.py

@@ -0,0 +1,161 @@
+"""Tests for external subtitle sidecars (src.core.subtitles)."""
+import pytest
+
+from src.core.subtitles import (
+    SubtitleFile,
+    attach_subtitle,
+    find_subtitles,
+    rename_subtitles_with,
+    subtitle_filename,
+)
+
+
+def _video(tmp_path, name="Matrix (1999) [tmdbid-603].mkv"):
+    v = tmp_path / name
+    v.write_bytes(b"x")
+    return v
+
+
+class TestSubtitleFilename:
+    def test_bare_no_language(self):
+        assert subtitle_filename("Matrix (1999)", ".srt") == "Matrix (1999).srt"
+
+    def test_with_language(self):
+        assert subtitle_filename("Matrix (1999)", ".srt", "cs") == "Matrix (1999).cs.srt"
+
+    def test_with_language_and_flag(self):
+        assert subtitle_filename("Matrix (1999)", ".srt", "cs", "forced") == \
+            "Matrix (1999).cs.forced.srt"
+
+    def test_uppercase_input_is_lowered(self):
+        assert subtitle_filename("Matrix (1999)", ".SRT", "CS", "FORCED") == \
+            "Matrix (1999).cs.forced.srt"
+
+
+class TestFindSubtitles:
+    def test_finds_bare_language_and_flagged(self, tmp_path):
+        video = _video(tmp_path)
+        (tmp_path / "Matrix (1999) [tmdbid-603].srt").write_bytes(b"x")
+        (tmp_path / "Matrix (1999) [tmdbid-603].cs.srt").write_bytes(b"x")
+        (tmp_path / "Matrix (1999) [tmdbid-603].en.forced.srt").write_bytes(b"x")
+
+        found = {s.path.name: s for s in find_subtitles(video)}
+        assert set(found) == {
+            "Matrix (1999) [tmdbid-603].srt",
+            "Matrix (1999) [tmdbid-603].cs.srt",
+            "Matrix (1999) [tmdbid-603].en.forced.srt",
+        }
+        assert found["Matrix (1999) [tmdbid-603].srt"].language is None
+        assert found["Matrix (1999) [tmdbid-603].cs.srt"].language == "cs"
+        assert found["Matrix (1999) [tmdbid-603].en.forced.srt"].language == "en"
+        assert found["Matrix (1999) [tmdbid-603].en.forced.srt"].flag == "forced"
+
+    def test_ignores_unrelated_and_overlapping_stem(self, tmp_path):
+        video = _video(tmp_path, "Matrix.mkv")
+        (tmp_path / "Matrix Reloaded.srt").write_bytes(b"x")  # overlapping prefix
+        (tmp_path / "Matrix.nfo").write_bytes(b"x")           # not a subtitle ext
+        (tmp_path / "poster.jpg").write_bytes(b"x")
+        assert find_subtitles(video) == []
+
+    def test_ignores_other_movies_subtitle(self, tmp_path):
+        video = _video(tmp_path, "Matrix.mkv")
+        (tmp_path / "Other Movie.cs.srt").write_bytes(b"x")
+        assert find_subtitles(video) == []
+
+    def test_missing_folder_is_empty(self, tmp_path):
+        assert find_subtitles(tmp_path / "nope" / "video.mkv") == []
+
+    def test_label_property(self):
+        assert SubtitleFile(path=None, language="cs").label == "cs"
+        assert SubtitleFile(path=None, language="cs", flag="forced").label == "cs (forced)"
+        assert SubtitleFile(path=None).label == "?"
+
+
+class TestAttachSubtitle:
+    def test_copies_and_names_to_match_video(self, tmp_path):
+        video = _video(tmp_path)
+        source = tmp_path / "downloaded.srt"
+        source.write_bytes(b"subtitle content")
+
+        target = attach_subtitle(video, source, language="cs")
+
+        assert target == tmp_path / "Matrix (1999) [tmdbid-603].cs.srt"
+        assert target.read_bytes() == b"subtitle content"
+        assert source.exists()  # copy, not move
+
+    def test_move_removes_source(self, tmp_path):
+        video = _video(tmp_path)
+        source = tmp_path / "downloaded.srt"
+        source.write_bytes(b"x")
+
+        target = attach_subtitle(video, source, language="en", move=True)
+
+        assert target.exists()
+        assert not source.exists()
+
+    def test_overwrites_same_language_slot(self, tmp_path):
+        video = _video(tmp_path)
+        old = tmp_path / "Matrix (1999) [tmdbid-603].cs.srt"
+        old.write_bytes(b"old")
+        source = tmp_path / "new.srt"
+        source.write_bytes(b"new")
+
+        target = attach_subtitle(video, source, language="cs")
+
+        assert target == old
+        assert target.read_bytes() == b"new"
+
+    def test_rejects_unsupported_extension(self, tmp_path):
+        video = _video(tmp_path)
+        source = tmp_path / "notes.txt"
+        source.write_bytes(b"x")
+        with pytest.raises(ValueError):
+            attach_subtitle(video, source)
+
+
+class TestRenameSubtitlesWith:
+    def test_moves_every_sidecar_preserving_lang_and_flag(self, tmp_path):
+        old_video = _video(tmp_path, "Matrix.mkv")
+        (tmp_path / "Matrix.srt").write_bytes(b"x")
+        (tmp_path / "Matrix.cs.srt").write_bytes(b"x")
+        (tmp_path / "Matrix.en.forced.srt").write_bytes(b"x")
+        new_video = tmp_path / "Matrix (1999) [tmdbid-603].mkv"
+
+        moved = rename_subtitles_with(old_video, new_video)
+
+        names = {p.name for p in moved}
+        assert names == {
+            "Matrix (1999) [tmdbid-603].srt",
+            "Matrix (1999) [tmdbid-603].cs.srt",
+            "Matrix (1999) [tmdbid-603].en.forced.srt",
+        }
+        for name in names:
+            assert (tmp_path / name).exists()
+        assert not (tmp_path / "Matrix.srt").exists()
+
+    def test_moves_across_folders(self, tmp_path):
+        old_dir = tmp_path / "Filmy"
+        old_dir.mkdir()
+        old_video = old_dir / "Matrix.mkv"
+        old_video.write_bytes(b"x")
+        (old_dir / "Matrix.cs.srt").write_bytes(b"x")
+        new_dir = tmp_path / "Kids"
+        new_dir.mkdir()
+        new_video = new_dir / "Matrix (1999).mkv"
+
+        moved = rename_subtitles_with(old_video, new_video)
+
+        assert moved == [new_dir / "Matrix (1999).cs.srt"]
+        assert (new_dir / "Matrix (1999).cs.srt").exists()
+        assert not (old_dir / "Matrix.cs.srt").exists()
+
+    def test_noop_when_path_unchanged(self, tmp_path):
+        video = _video(tmp_path, "Matrix.mkv")
+        (tmp_path / "Matrix.cs.srt").write_bytes(b"x")
+        assert rename_subtitles_with(video, video) == []
+        assert (tmp_path / "Matrix.cs.srt").exists()
+
+    def test_no_subtitles_is_noop(self, tmp_path):
+        old_video = _video(tmp_path, "Matrix.mkv")
+        new_video = tmp_path / "Matrix (1999).mkv"
+        assert rename_subtitles_with(old_video, new_video) == []