databse wipe

main.py

@@ -174,6 +174,15 @@ async def test_calibre():
     return {"ok": ok, "message": message}
 
 
+# --- Data reset ---
+
+@app.post("/settings/reset-sync-data")
+async def reset_sync_data():
+    counts = db.clear_sync_data()
+    log.info("Sync data cleared: %s", counts)
+    return RedirectResponse("/settings?reset=1", status_code=303)
+
+
 # --- JSON status API ---
 
 @app.get("/api/status")