feat: add NAS management UI and operation history

am_deduper/db.py

@@ -33,6 +33,25 @@ CREATE INDEX IF NOT EXISTS idx_sha256 ON audio_tracks(sha256);
 CREATE INDEX IF NOT EXISTS idx_duration ON audio_tracks(duration);
 CREATE INDEX IF NOT EXISTS idx_status ON audio_tracks(status);
 CREATE INDEX IF NOT EXISTS idx_duration_size ON audio_tracks(duration, file_size);
+CREATE TABLE IF NOT EXISTS operations (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    action TEXT NOT NULL,
+    file_path TEXT NOT NULL,
+    winner_path TEXT,
+    details TEXT,
+    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+CREATE INDEX IF NOT EXISTS idx_operations_created ON operations(created_at);
+CREATE TABLE IF NOT EXISTS jobs (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    kind TEXT NOT NULL,
+    status TEXT NOT NULL,
+    started_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    finished_at TEXT,
+    result TEXT,
+    error TEXT
+);
+CREATE INDEX IF NOT EXISTS idx_jobs_started ON jobs(started_at);
 """