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P3 Task 11 (WRITE & COMPILE phase; device run pending MuMu availability). - integration_test/p3_flow_test.dart: login -> album (zh+en) -> category -> invite -> enqueue 3 real JPEGs -> queue completed -> server history (sourceDeviceId) -> ov public API sees 3 -> hide via API + UI sync -> DIO fault-gate offline (waitingNetwork -> retry -> 4 completed) -> password change (session kept) -> relogin -> in-app locale smoke. - integration_test/p3_background_test.dart: IT_PHASE=prepare/verify spec for HOME-background continuation and force-stop kill-restart recovery (2 x ~14MB noise JPEGs give a deterministic mid-flight window). - helpers: dart-define config, fault-injecting DIO adapter, app harness (picker/notification/locale provider overrides), UI step library with live-binding polling (no pumpAndSettle). - scripts/run-mobile-it.sh: device detect (exit 2), backend ensure (compose + api/ov/worker/sync, exit 3), idempotent per-run user seed (no DB reset), APK build/install + adb push of testdata, phase 1 / --background phase 2 orchestration with server-side confirmed-count truth via curl. - services/api seed:it script (create-if-absent staff accounts). - debug-only network security config: cleartext HTTP permitted to 10.0.2.2/127.0.0.1/localhost only (release unaffected). - testdata: 3 x ~120KB + 2 x ~14MB generated JPEGs. Co-Authored-By: Claude Code <noreply@anthropic.com>