Second slice of the app.js split (after crypto). Moves the WebDAV sync
section to js/app.sync.js: transport (_webdavCall), buildSyncSnapshot,
applyRemoteSnapshot (merge + tombstone arbitration), runSyncNow, and the
sync settings UI.
- Byte-for-byte identical to the extracted block (verified before removal);
no duplicate const; no top-level sync reference left in app.js.
- Load order: AFTER app.js (unlike crypto, which loads before) because this
module has a top-level side effect — `Bridge.onWebdavResult = …` — that
needs Bridge/state/api already declared. Rule documented in CLAUDE.md.
- index.html + BuildAssets whitelist + harness APP_PARTS updated; assets
rebuilt to embed the new file.
- Safety net: the existing merge tests exercise applyRemoteSnapshot /
buildSyncSnapshot from the extracted file and stay green (42/42).
app.js: 11936 → 11256 lines (crypto + sync now separate).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
r-zakarya