Add web UI for configuration and management

- Flask-based web interface on port 8080
- Dashboard with channel statistics and sync status
- Channel management (add/remove channels via UI)
- Settings page for all configuration options
- Cookie file upload interface
- Real-time log viewer
- Manual sync trigger from web UI
- Updated Dockerfile to include Flask and web assets
- Updated Unraid template with WebUI port
- Updated README with web UI documentation

static/script.js

@@ -0,0 +1,34 @@
+// Auto-dismiss alerts after 5 seconds
+document.addEventListener('DOMContentLoaded', function() {
+    const alerts = document.querySelectorAll('.alert');
+    alerts.forEach(alert => {
+        setTimeout(() => {
+            alert.style.opacity = '0';
+            alert.style.transition = 'opacity 0.5s';
+            setTimeout(() => alert.remove(), 500);
+        }, 5000);
+    });
+});
+
+// Confirm navigation away from form if modified
+document.addEventListener('DOMContentLoaded', function() {
+    const forms = document.querySelectorAll('form');
+    forms.forEach(form => {
+        let formModified = false;
+
+        form.addEventListener('input', () => {
+            formModified = true;
+        });
+
+        form.addEventListener('submit', () => {
+            formModified = false;
+        });
+
+        window.addEventListener('beforeunload', (e) => {
+            if (formModified) {
+                e.preventDefault();
+                e.returnValue = '';
+            }
+        });
+    });
+});