feat(ui): add message cache management page and dashboard enhancements

- Introduced MessageCachePage for browsing and managing cached webhook events.
- Enhanced DashboardPage to display runtime stats and message cache information.
- Added new API types for message cache events and system stats.
- Integrated SwaggerPage for API documentation and live request testing.

ACCOUNT_MANAGEMENT.md

@@ -45,7 +45,7 @@ Add a new WhatsApp account to the system.
 
 **Endpoint:** `POST /api/accounts/add`
 
-**Request Body (WhatsApp Web/WhatsMe ow):**
+**Request Body (Whatsapp):**
 
 ```json
 {
@@ -420,7 +420,7 @@ INFO Skipping disabled account account_id=business
    - Account will be reconnected automatically if enabled
 
 3. **Session Management**:
-   - WhatsMe ow sessions are stored in `session_path`
+   - Whatsapp sessions are stored in `session_path`
    - Removing an account doesn't delete session files
    - Clean up manually if needed