fix: resolve IndentationError in database migrations

database.py

@@ -395,17 +395,18 @@ def setup_database():
         cursor.execute("SELECT group_name FROM sessions LIMIT 1")
     except sqlite3.OperationalError:
         cursor.execute("ALTER TABLE sessions ADD COLUMN group_name TEXT")
-try:
-    cursor.execute("SELECT pdf_viewer FROM users LIMIT 1")
-except sqlite3.OperationalError:
-    cursor.execute("ALTER TABLE users ADD COLUMN pdf_viewer TEXT DEFAULT 'native'")
 
-try:
-    cursor.execute("SELECT use_ai_suggestions FROM users LIMIT 1")
-except sqlite3.OperationalError:
-    cursor.execute("ALTER TABLE users ADD COLUMN use_ai_suggestions INTEGER DEFAULT 1")
+    try:
+        cursor.execute("SELECT pdf_viewer FROM users LIMIT 1")
+    except sqlite3.OperationalError:
+        cursor.execute("ALTER TABLE users ADD COLUMN pdf_viewer TEXT DEFAULT 'native'")
+
+    try:
+        cursor.execute("SELECT use_ai_suggestions FROM users LIMIT 1")
+    except sqlite3.OperationalError:
+        cursor.execute("ALTER TABLE users ADD COLUMN use_ai_suggestions INTEGER DEFAULT 1")
 
-conn.commit()
+    conn.commit()
 
     # Migration to normalize subject names (e.g., "CHEMISTRY" to "Chemistry", "PHYSICS" to "Physics", etc.)
     try: