fix: WAL mode on SQLite + longer timeout to prevent database locked errors

app.py

@@ -75,8 +75,10 @@ def require_login_global():
         return redirect(url_for('login'))
 
 def get_db():
-    conn = sqlite3.connect(DATABASE, timeout=10)
+    conn = sqlite3.connect(DATABASE, timeout=30)
     conn.row_factory = sqlite3.Row
+    conn.execute('PRAGMA journal_mode=WAL')
+    conn.execute('PRAGMA synchronous=NORMAL')
     return conn
 
 def init_db():
@@ -2038,8 +2040,10 @@ def _ha_sync_once():
         states = _ha_fetch_all_states(ha_url, ha_token)
         if not states:
             return
-        conn = sqlite3.connect(DATABASE, timeout=15)
+        # Ouvrir la connexion d'écriture APRÈS l'appel HTTP (qui peut être long)
+        conn = sqlite3.connect(DATABASE, timeout=30)
         conn.row_factory = sqlite3.Row
+        conn.execute('PRAGMA journal_mode=WAL')
         printers = conn.execute(
             "SELECT id, name, ha_entity_prefix FROM printers "
             "WHERE ha_entity_prefix IS NOT NULL AND ha_entity_prefix != ''"