feat: update user preferences and system settings management

qwen3-tts-backend/scripts/migrate_add_system_settings.py

@@ -0,0 +1,70 @@
+from sqlalchemy import create_engine, text
+from sqlalchemy.orm import sessionmaker
+from datetime import datetime
+import sys
+from pathlib import Path
+
+sys.path.append(str(Path(__file__).parent.parent))
+
+from config import settings
+
+engine = create_engine(
+    settings.DATABASE_URL,
+    connect_args={"check_same_thread": False} if "sqlite" in settings.DATABASE_URL else {}
+)
+
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+def upgrade():
+    db = SessionLocal()
+    try:
+        db.execute(text("""
+            CREATE TABLE IF NOT EXISTS system_settings (
+                id INTEGER PRIMARY KEY,
+                key VARCHAR(100) UNIQUE NOT NULL,
+                value JSON NOT NULL,
+                updated_at DATETIME NOT NULL
+            )
+        """))
+
+        db.execute(text("""
+            CREATE INDEX IF NOT EXISTS ix_system_settings_key ON system_settings (key)
+        """))
+
+        result = db.execute(text(
+            "SELECT COUNT(*) as count FROM system_settings WHERE key = 'local_model_enabled'"
+        ))
+        count = result.fetchone()[0]
+
+        if count == 0:
+            db.execute(text(
+                "INSERT INTO system_settings (key, value, updated_at) VALUES "
+                "('local_model_enabled', '{\"enabled\": false}', :now)"
+            ), {"now": datetime.utcnow()})
+
+        db.execute(text("""
+            UPDATE users
+            SET user_preferences = json_set(
+                COALESCE(user_preferences, '{}'),
+                '$.default_backend',
+                'aliyun'
+            )
+            WHERE json_extract(user_preferences, '$.default_backend') IS NULL
+               OR json_extract(user_preferences, '$.default_backend') = 'local'
+        """))
+
+        db.commit()
+        print("Migration completed successfully!")
+        print("- Created system_settings table")
+        print("- Added local_model_enabled setting (default: false)")
+        print("- Updated user preferences to use aliyun backend by default")
+
+    except Exception as e:
+        db.rollback()
+        print(f"Migration failed: {e}")
+        raise
+    finally:
+        db.close()
+
+if __name__ == "__main__":
+    upgrade()