Full correctness check against the docs: safer writes, reverts and texts

Safety
- Writes are serialized (Workspace.lock): two background jobs rebuilding one
  package (a sound and its subtitle applied side by side) lost an edit.
- A store copies a bank file or package as "original" only if it matches the
  shipped catalog (Workspace.unoriginal_files: in-memory sounds, bank copies of
  voice lines, subtitles); the editor refuses to switch stores while changes
  are applied. A second store could otherwise resurrect a reverted sound.
- Mod import in the editor asks before overwriting files changed outside the
  tool (it forced silently).
- Revert all in the editor reverts texts too; the uninstaller counts text
  edits before offering to delete the store.
- ackit restore-backup: the full-backup restore decisions.md described; it
  keeps the sounds of WADs without a full copy recorded.
- build_catalog also stops when a subtitle differs from the catalog.

Languages and texts
- Game.language() returns languages without voices (JPN, RUS, ...) and
  Game.voice_archive() their INT voices; ackit text --lang JPN works.
- Menu lookups parse one cached file (find & replace: minutes -> ms).
- Subtitles decode cp1252 as Windows does: the UTF-8-in-cp1252 line
  Speech_TAPE_J_Answer_1_00 (KOR/POL/POR/RUS) is written back byte-for-byte;
  SUB_KOR/SUB_RUS rebuilt from the original game (only those rows changed).
- Mods exported while another language is loaded keep name and line.

Other fixes
- Down-mix folds extra channels in at -3 dB (a 5.1 centre voice was dropped).
- e2e_editor no longer overwrites the user's settings.json; kill_game waits
  for the game to exit before reverts.
- Recorder handles Int32/UInt8 input and split frames; package block cache
  locked; conflict messages, CLI help examples, stale docstrings and doc
  references fixed; tests no longer read this PC's game language.

Docs (decisions, user guide, README, subtitles.md, banks.md, catalog README,
REPORT, NOTES, CLAUDE.md) updated; check_docs: 102 claims match. 148 tests;
e2e_features 9/9, e2e_editor and verify PASS; game original afterwards.

tests/test_catalog.py

@@ -180,3 +180,19 @@ def test_every_name_resolves_to_its_sound(real_game_dir):
     for lang in g.languages:
         cat = Catalog(g, [lang, "SFX", "BANK"])
         assert all(cat.resolve(s.name) is s for s in cat.sounds), lang
+
+
+def test_build_catalog_stops_on_changed_subtitles(tmp_path):
+    """tools/build_catalog.py refuses to record a modified game: changed subtitles count like changed sounds."""
+    import importlib.util
+    from types import SimpleNamespace
+    from ackit import subtitles
+    spec = importlib.util.spec_from_file_location("build_catalog", os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), "tools", "build_catalog.py"))
+    bc = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(bc)
+    row = subtitles.SubLine("INT", "Speech_X", 0, "Original.", 12, "a", "")
+    subtitles.write_texts(str(tmp_path / "SUB_INT.csv"), [row])
+    game = SimpleNamespace(archives={})
+    assert bc.changed_since_catalog(game, str(tmp_path), [], {"INT": [row]}) == []
+    assert bc.changed_since_catalog(game, str(tmp_path), [], {"INT": [row._replace(text="Edited.")]}) == \
+        ["SUB:INT:Speech_X:0"]