* fix(android): use app filesDir for persistence and SAF log export
Honor devices reject writes under /data/local/tmp, which caused PreferencesStore to fall back to openless_prefs_fallback.json and settings saves to fail. Initialize JNI storage roots before Coordinator and file logging, route logs to files/logs/openless.log, and export via ContentResolver for SAF content:// URIs.
* fix(android): guard StylePack empty asset_root and Android-only coord logs
Reject persisting style pack icons when asset_root is empty to avoid writing under cwd; no-op cleanup on empty root. Limit Coordinator persistence degrade log suffix to Android only. Add unit test.
Co-authored-by: Cursor <cursoragent@cursor.com>
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Co-authored-by: Cursor <cursoragent@cursor.com>
