feat: Add Nanaxe server with Docker, GitHub Actions CI/CD, and auto-deployment

- Add complete server infrastructure with Gitea, API, PostgreSQL
- Implement Obsidian-compatible markdown mindmap converter
- Add Flutter service for server synchronization
- Configure GitHub Actions for automated build and deploy
- Add production docker-compose with health checks
- Include VPS setup and deployment scripts
- Add comprehensive deployment documentation

lib/providers/task_provider.dart

@@ -2,7 +2,6 @@ import 'dart:async';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:uuid/uuid.dart';
 import '../models/task_model.dart';
-import '../models/project_model.dart';
 import '../core/firestore_service.dart';
 import '../core/local_storage_service.dart';
 import '../core/deepseek_service.dart';
@@ -253,7 +252,7 @@ class TasksNotifier extends StateNotifier<AsyncValue<List<TaskModel>>> {
       }
 
       return subtasks;
-    } catch (e, st) {
+    } catch (e) {
       rethrow;
     }
   }