优化配置，修复 demo bug

1，network 框架完善
2，websocket 机制完善
3，设计文档整理到架构文档
4，脚本，配置完善

apps/im_app/lib/features/chat/presentation/chat_db_test_view_model.dart

@@ -1,7 +1,6 @@
 import 'dart:math';
 
 import 'package:drift/drift.dart';
-import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:im_app/app/di/db_provider.dart';
 import 'package:im_app/data/local/drift/app_database.dart';
@@ -45,13 +44,12 @@ class ChatDbTestState {
 
 @riverpod
 class ChatDbTestViewModel extends _$ChatDbTestViewModel {
-
   @override
   ChatDbTestState build() {
     // 这里就是 onInit
     final List<TestResult> testResults = List.generate(
       1000,
-          (i) => TestResult(
+      (i) => TestResult(
         title: '用户 ${Random().nextInt(9999)}',
         subtitle: 'uid: ${Random().nextInt(999999)}',
         duration: '${Random().nextInt(500)}ms',
@@ -86,7 +84,7 @@ class ChatDbTestViewModel extends _$ChatDbTestViewModel {
     for (var i = 0; i < count; i += chunkSize) {
       final chunk = List.generate(
         chunkSize.clamp(0, count - i),
-            (j) => UsersCompanion.insert(
+        (j) => UsersCompanion.insert(
           uid: Value(i + j),
           nickname: Value('User ${i + j}'),
         ),
@@ -98,13 +96,13 @@ class ChatDbTestViewModel extends _$ChatDbTestViewModel {
       // 让出主线程
       await Future.delayed(Duration.zero);
 
-      debugPrint('已完成: $completed / $count (${stopwatch.elapsedMilliseconds}ms)');
+      debugPrint(
+        '已完成: $completed / $count (${stopwatch.elapsedMilliseconds}ms)',
+      );
 
       // 更新 UI 状态
       if (ref.mounted) {
-        state = state.copyWith(
-          currentState: '已插入 $completed / $count 条',
-        );
+        state = state.copyWith(currentState: '已插入 $completed / $count 条');
       }
     }
 
@@ -116,4 +114,4 @@ class ChatDbTestViewModel extends _$ChatDbTestViewModel {
       );
     }
   }
-}
+}