Add Streamlit Docker auto-sync deployment

app.py

@@ -7,6 +7,7 @@ import streamlit as st
 from pathlib import Path
 import spotipy
 
+from spotify_to_tidal import auto_sync as _auto_sync
 from spotify_to_tidal import auth as _auth
 from spotify_to_tidal import sync as _sync
 from spotify_to_tidal.tidalapi_patch import get_all_playlists
@@ -14,6 +15,7 @@ from spotify_to_tidal.tidalapi_patch import get_all_playlists
 # ── Constants ─────────────────────────────────────────────────────────────────
 SESSION_FILE   = Path("session.json")
 NOT_FOUND_FILE = Path("songs not found.txt")
+AUTO_SYNC_STATUS_FILE = Path("auto_sync_status.json")
 
 # ── Session persistence ───────────────────────────────────────────────────────
 def load_session() -> dict:
@@ -38,6 +40,14 @@ def save_watched(ids: set):
 def load_external_playlists() -> list:
     return load_session().get("external_playlists", [])
 
+def load_auto_sync_status() -> dict:
+    if AUTO_SYNC_STATUS_FILE.exists():
+        try:
+            return json.loads(AUTO_SYNC_STATUS_FILE.read_text())
+        except Exception:
+            pass
+    return {}
+
 def upsert_external_playlist(info: dict):
     data = load_session()
     ext = [p for p in data.get("external_playlists", []) if p.get("id") != info["id"]]
@@ -93,6 +103,28 @@ def get_sessions():
 
 config, spotify_session, tidal_session = get_sessions()
 
+@st.cache_resource
+def start_auto_sync_scheduler(config: dict):
+    return _auto_sync.start_scheduler(
+        config,
+        session_file=SESSION_FILE,
+        status_file=AUTO_SYNC_STATUS_FILE,
+    )
+
+start_auto_sync_scheduler(config)
+
+if (config.get("auto_sync") or {}).get("enabled", False):
+    auto_status = load_auto_sync_status()
+    with st.sidebar:
+        st.caption("Daily auto-sync")
+        st.write(auto_status.get("state", "starting"))
+        if auto_status.get("next_run_at"):
+            st.caption(f"Next: {auto_status['next_run_at']}")
+        if auto_status.get("last_run_at"):
+            st.caption(f"Last: {auto_status['last_run_at']}")
+        if auto_status.get("error"):
+            st.error(auto_status["error"])
+
 # ── Data fetchers ─────────────────────────────────────────────────────────────
 @st.cache_data
 def fetch_my_playlists():