Register the web application design document in check_versions

CHANGELOG.md

@@ -7,6 +7,15 @@ ships documents, so it uses the same `v#` scheme as the documents themselves.
 Individual guideline documents carry their own `Document Version` header, and the skills carry
 `metadata.version`; both are independent of the revisions below.
 
+## v8 — 2026-09-29
+
+### Fixed
+- `WEB/DESIGN_DOCUMENT_WEBAPP.md` registered in `check_versions.py`. v7 added the document but left it
+  out of `MASTERS`, so its copies in projects were never compared against the master and `--sync`
+  never propagated it
+
+---
+
 ## v7 — 2026-09-24
 
 ### Added

check_versions.py

@@ -46,6 +46,7 @@ MASTERS: dict[str, str] = {
     "DESIGN_DOCUMENT_RUST_LIB.md": "Rust/DESIGN_DOCUMENT_RUST_LIB.md",
     "DESIGN_DOCUMENT_GODOT.md": "Godot/DESIGN_DOCUMENT_GODOT.md",
     "DESIGN_DOCUMENT_API.md": "API/DESIGN_DOCUMENT_API.md",
+    "DESIGN_DOCUMENT_WEBAPP.md": "WEB/DESIGN_DOCUMENT_WEBAPP.md",
 }
 
 # Names used before the language became part of the file name. A project still carrying one of these