- scan.rs: recursive walk of Pictures/DCIM (GALLERY_SCAN_DIRS override),
image-ext detection, mtime/size capture, no symlink-dir following
- db.rs: rusqlite(bundled) store; incremental apply (insert/update/delete)
keyed on path with mtime/size change detection; derived columns reset on
change; Android DB path in Android/data/<pkg>/files (EXTERNAL_DATA_DIR is
unset in this NativeActivity setup)
- lib.rs: start_scan() background thread -> invoke_from_event_loop ->
VecModel + status line; called from desktop and Android entry points
- main.slint: ListView of paths (M1), status line with scan stats
- main.rs: fix desktop bin for 1.18.1 (no slint::Result; ComponentHandle)
- build.sh: export NDK clang CC_/CXX_/AR_ per target (bundled sqlite)
- tests: 5k-file scan < 2s, incremental apply, roundtrip
Verified on emulator: 5002 files in 153-226 ms; relaunch 0+ 0~ 0-;
touch -> 1~, delete -> 1-.
