Fix setup to login redirect issue

- Fix setup.html to use redirect_url from API response instead of hardcoded '/'
- Add database creation (aniworld.db, cache.db) during setup process
- Setup now properly creates all required files for validation
- After setup completion, users are correctly redirected to /login
- Tested: setup API returns correct redirect_url, database files created, redirect works

src/server/fastapi_app.py

@@ -500,6 +500,57 @@ async def process_setup(request_data: SetupRequest) -> SetupResponse:
             }
         }
         
+        # Create database files if they don't exist
+        try:
+            db_path = Path("data/aniworld.db")
+            cache_db_path = Path("data/cache.db")
+            
+            # Ensure data directory exists
+            db_path.parent.mkdir(parents=True, exist_ok=True)
+            
+            # Create empty database files if they don't exist
+            if not db_path.exists():
+                import sqlite3
+                with sqlite3.connect(str(db_path)) as conn:
+                    cursor = conn.cursor()
+                    # Create a basic table to make the database valid
+                    cursor.execute("""
+                        CREATE TABLE IF NOT EXISTS setup_info (
+                            id INTEGER PRIMARY KEY,
+                            setup_date TEXT,
+                            version TEXT
+                        )
+                    """)
+                    cursor.execute("""
+                        INSERT INTO setup_info (setup_date, version) 
+                        VALUES (?, ?)
+                    """, (datetime.utcnow().isoformat(), "1.0.0"))
+                    conn.commit()
+                logger.info("Created aniworld.db")
+            
+            if not cache_db_path.exists():
+                import sqlite3
+                with sqlite3.connect(str(cache_db_path)) as conn:
+                    cursor = conn.cursor()
+                    # Create a basic cache table
+                    cursor.execute("""
+                        CREATE TABLE IF NOT EXISTS cache (
+                            id INTEGER PRIMARY KEY,
+                            key TEXT UNIQUE,
+                            value TEXT,
+                            created_at TEXT
+                        )
+                    """)
+                    conn.commit()
+                logger.info("Created cache.db")
+                
+        except Exception as e:
+            logger.error(f"Failed to create database files: {e}")
+            return SetupResponse(
+                status="error",
+                message=f"Failed to create database files: {str(e)}"
+            )
+        
         # Mark setup as complete and save configuration
         success = setup_service.mark_setup_complete(config_updates)
         

src/server/web/templates/base/setup.html

@@ -513,7 +513,9 @@
                 if (data.status === 'success') {
                     showMessage('Setup completed successfully! Redirecting...', 'success');
                     setTimeout(() => {
-                        window.location.href = '/';
+                        // Use redirect_url from API response, fallback to /login
+                        const redirectUrl = data.redirect_url || '/login';
+                        window.location.href = redirectUrl;
                     }, 2000);
                 } else {
                     showMessage(data.message, 'error');