Make the codebase mypy-clean, drop dead media_utils and Pillow, rewrite README

docs/README.md

@@ -26,7 +26,6 @@ Filmotéka tree.
 | [`src/core/jellyfin.py`](modules/core.jellyfin.md) | Jellyfin server API client — thin, hybrid integration. |
 | [`src/core/legacy_meta.py`](modules/core.legacy_meta.md) | Readers for Curator's *pre-index* metadata layouts. |
 | [`src/core/list_manager.py`](modules/core.list_manager.md) | Sorting of file lists by name or by date added. |
-| [`src/core/media_utils.py`](modules/core.media_utils.md) | Helpers around media files: loading small icons for Qt widgets and detecting the vertical video resolution with `ffprobe`, mapping it to a `Rozlišení/<height>p` tag. |
 | [`src/core/migrate.py`](modules/core.migrate.md) | One-off migration of an existing pool to the Jellyfin naming convention. |
 | [`src/core/movie.py`](modules/core.movie.md) | The movie object — metadata first, files second. |
 | [`src/core/naming.py`](modules/core.naming.md) | Pool file naming convention. |

docs/modules/core.media_utils.md

@@ -1,27 +0,0 @@
-# `src/core/media_utils.py`
-
-Helpers around media files: loading small icons for Qt widgets and detecting the vertical video resolution with `ffprobe`, mapping it to a `Rozlišení/<height>p` tag.
-
-Source: [`src/core/media_utils.py`](../../src/core/media_utils.py)
-
-## Functions
-
-### `load_icon`
-
-*function · line 14*
-
-```python
-load_icon(path) -> ImageTk.PhotoImage
-```
-
-Load an image file and scale it to 16×16 px as a Qt-compatible icon.
-
-### `add_video_resolution_tag`
-
-*function · line 19*
-
-```python
-add_video_resolution_tag(file_obj: File, tagmanager: TagManager)
-```
-
-Read the vertical resolution of a video with `ffprobe` and tag the file with `Rozlišení/<height>p`. Needs FFmpeg on the PATH.