feat: 优化前端 UI 组件与交互体验

- 优化日历、待办、消息等页面交互
- 更新 ChatBloc 与 UI Schema 渲染
- 优化联系人、首页、设置页面体验

apps/lib/features/contacts/ui/screens/contacts_screen.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 import '../../../../core/di/injection.dart';
 import '../../../../core/theme/design_tokens.dart';
+import '../../../../shared/widgets/app_loading_indicator.dart';
 import '../../../../shared/widgets/toast/index.dart';
 import '../../../../shared/widgets/app_button.dart';
 import '../../../../shared/widgets/page_header.dart' as widgets;
@@ -289,7 +290,7 @@ class _ContactsScreenState extends State<ContactsScreen> {
                       const Center(
                         child: Padding(
                           padding: EdgeInsets.all(20),
-                          child: CircularProgressIndicator(),
+                          child: AppLoadingIndicator(size: 22),
                         ),
                       )
                     else if (_friends.isEmpty)
@@ -367,7 +368,13 @@ class _ContactsScreenState extends State<ContactsScreen> {
             child: _isSearching
                 ? const Padding(
                     padding: EdgeInsets.all(10),
-                    child: CircularProgressIndicator(strokeWidth: 2),
+                    child: AppLoadingIndicator(
+                      size: 16,
+                      strokeWidth: 2,
+                      color: AppColors.blue500,
+                      trackColor: AppColors.blue100,
+                      withContainer: false,
+                    ),
                   )
                 : const Icon(Icons.search, size: 16, color: AppColors.blue500),
           ),
@@ -399,7 +406,7 @@ class _ContactsScreenState extends State<ContactsScreen> {
           if (_isSearching)
             Container(
               padding: const EdgeInsets.all(20),
-              child: const Center(child: CircularProgressIndicator()),
+              child: const Center(child: AppLoadingIndicator(size: 22)),
             )
           else if (_searchResults.isEmpty)
             Container(
@@ -773,13 +780,12 @@ class _ContactsScreenState extends State<ContactsScreen> {
           ),
         ),
         child: _sendingRequestUserId == userId
-            ? const SizedBox(
-                width: 16,
-                height: 16,
-                child: CircularProgressIndicator(
-                  strokeWidth: 2,
-                  color: AppColors.white,
-                ),
+            ? const AppLoadingIndicator(
+                size: 16,
+                strokeWidth: 2,
+                color: AppColors.white,
+                trackColor: AppColors.blue300,
+                withContainer: false,
               )
             : const Text(
                 '发送',