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.

data/catalog/SUB_KOR.csv

@@ -8138,7 +8138,7 @@ Speech_TAPE_JOKER_5_16,0,아예 샤피를 미치게 만든 건 네가 아니라
 Speech_TAPE_JOKER_5_17,0,고맙네.,4,w,INT:3F21770A:5
 Speech_TAPE_JOKER_5_18,0,"자, 네 과거를 사람들에게 알리고 싶지 않다면 남의 과거를 캐묻고 다니는 일은 그만둬.",48,w,INT:3F21770A:12
 Speech_TAPE_JOKER_5_19,0,의사를 하나 더 보내줘. 다른 의사의 진단도 받아보고 싶군.,33,w,INT:3F21770A:0
-Speech_TAPE_J_Answer_1_00,0,"í•œ 통ì<EFBFBD>˜ 부ìž,중 전화가 있습니다.",44,a,
+Speech_TAPE_J_Answer_1_00,0,"í•œ 통의 부ìž,중 전화가 있습니다.",44,a,
 Speech_TAPE_J_Answer_1_CHAR_JOKER_First_answer_01,0,왜 진작에 이 생각을 못 했을까? 세상에 둘도 없는 최고의 친구와 직통 회선을 연결하는 거 말야.,54,w,INT:4709E5BE:0
 Speech_TAPE_J_Answer_1_CHAR_JOKER_First_answer_02,0,생각해 봐. 심심하면 언제든 통화 할 수 있어. 우리 사인 한층 각별해지고 있지. 이젠 이메일을 주고받거나 낭만적인 저녁 식사를 하는 일만 남았어.,82,w,INT:4709E5BE:1
 Speech_TAPE_J_Answer_2_01,0,한 통의 부재중 전화가 있습니다.,18,w,INT:4709E5BD:1