implemented client side filters, mobile first styling and modals for articles

backend/app/database.py

@@ -175,31 +175,53 @@ class DatabaseManager:
             A database cursor for executing SQL statements
         """
         conn = None
+        cursor = None
         try:
             conn = self._get_connection()
+            cursor = conn.cursor()
 
             if readonly:
                 conn.execute("BEGIN DEFERRED")
+            else:
+                conn.execute("BEGIN IMMEDIATE")
 
-            cursor = conn.cursor()
             yield cursor
 
             if not readonly:
                 conn.commit()
+            else:
+                # For readonly transactions, we still need to end the transaction
+                conn.commit()
+
         except sqlite3.OperationalError as e:
             if conn:
-                conn.rollback()
+                try:
+                    conn.rollback()
+                except:
+                    pass
             if "database is locked" in str(e).lower():
                 logger.warning(
                     f"⚠️ Database temporarily locked, operation may need retry: {e}")
             raise e
         except Exception as e:
             if conn:
-                conn.rollback()
+                try:
+                    conn.rollback()
+                except:
+                    pass
             raise e
         finally:
+            if cursor:
+                try:
+                    cursor.close()
+                except:
+                    pass
             if conn:
-                conn.close()
+                try:
+                    conn.close()
+                except:
+                    pass
+
 
     @contextmanager
     def get_cursor_with_retry(self,