fix: database connection handling

- Create new connections for each request instead of reusing one
- Remove global connection pool to fix thread reuse error
- Simplify shutdown handler

backend/main.py

@@ -102,7 +102,14 @@ app = FastAPI()
 ha_mqtt = HomeAssistantMQTT()
 
 # Constants
-DB_PATH = "gate.db"  # Database file path
+DB_PATH = "gatekeeper.db"  # Database file path
+
+# Database connection handling
+async def get_db():
+    """Get a new database connection"""
+    db = await aiosqlite.connect(DB_PATH)
+    db.row_factory = aiosqlite.Row
+    return db
 
 # Set up MQTT event logging
 async def log_mqtt_event(action: str, success: bool = True):
@@ -467,17 +474,6 @@ async def update_settings(settings: Settings):
 # Serve static files
 app.mount("/", StaticFiles(directory="../public", html=True), name="static")
 
-# Database connection pool
-db_pool = None
-
-async def get_db():
-    """Get a database connection from the pool"""
-    global db_pool
-    if db_pool is None:
-        db_pool = await aiosqlite.connect(DB_PATH)
-        db_pool.row_factory = aiosqlite.Row
-    return db_pool
-
 # GPIO Setup
 def setup_gpio():
     """Initialize GPIO pins based on settings"""
@@ -665,10 +661,8 @@ async def shutdown_event():
 
         # 4. Close database connection
         logger.info("Closing database connection...")
-        global db_pool
-        if db_pool:
-            await db_pool.close()
-            logger.info("Database connection closed")
+        # No need to explicitly close as we're using new connections for each request
+        logger.info("Database connections will be closed automatically")
 
         logger.info("Shutdown completed successfully")
     except Exception as e:

frontend/src/App.tsx

@@ -9,8 +9,8 @@ function App() {
   const [hasMoreEvents, setHasMoreEvents] = useState(false);
   const [totalEvents, setTotalEvents] = useState(0);
   const [settings, setSettings] = useState<Settings>({ 
-    maxOpenTimeSeconds: '300',
-    triggerDuration: '500',
+    maxOpenTimeSeconds: 300,
+    triggerDuration: 500,
     mqtt: {
       broker: 'localhost',
       port: '1883',
@@ -84,7 +84,7 @@ function App() {
       if (result.success) {
         const newEvents = await api.getEvents();
         setEvents(newEvents.events);
-        setGateStatus(prev => ({ ...prev, isOpen: result.currentStatus }));
+        setGateStatus(prev => ({ ...prev, isOpen: result.isOpen }));
       }
     } catch (err) {
       setError('Failed to trigger gate');