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.

ackit/banks.py

@@ -4,10 +4,12 @@ in the .upk packages (docs/formats/banks.md, upk.md). Catalog archive `BANK`, ta
 A media ID can be stored many times (the same bank copied into several packages, or several banks
 holding the same media). The location index (data/catalog/BANK_locations.csv.gz) lists every copy:
   media, file (relative to CookedPCConsole, '/'-separated), offset (in the *uncompressed* file), size, kind
-kind 'm' = an in-memory sound, 'p' = the in-memory head of a streamed WAD sound (prefetch); for 'p' rows
-`sound` is the WAD sound's key (e.g. ITA:2B14E472:3): speech lines have per-language media IDs and heads.
-Replacements are written in place into every copy (<= original size, zero-padded), so bank and package
-layouts never change.
+kind 'm' = an in-memory sound, 'p' = a bank copy of a streamed WAD recording (the in-memory head of a prefetched
+sound, or a whole copy with the same media ID); for 'p' rows `sound` is the WAD sound's key (e.g. ITA:2B14E472:3):
+speech lines have per-language media IDs and heads.
+Replacements are written in place into every copy, no larger than the smallest; a whole in-memory WEM fills its
+slot exactly (wem.fill: the game plays a zero-padded one as silence), a head gets the start of the new
+recording. So bank and package layouts never change.
 """
 import csv
 import gzip
@@ -157,7 +159,7 @@ class Scan:
         self.actions = {}                    # id -> target id
         self.sound_media = defaultdict(set)  # sound object id -> media ids
         self.prefetch = set()                # media ids whose bank copies belong to a WAD recording (prefetch
-                                             # heads; whole recordings: catalog._whole_recordings)
+                                             # heads; whole recordings: catalog.whole_recordings)
         self.lang_media = defaultdict(set)   # language -> media ids named by Sound objects of that language's banks
         # BKPK tables: WAD entry id -> {language: {media id: (offset in entry, size)}}. A table belongs to the
         # language its localized AkBank export declares ('' = outside such an export). The same media ID can be