refactor: 优化日历状态管理与首页输入框，添加API客户端抽象

apps/lib/features/home/ui/screens/home_screen.dart

@@ -4,9 +4,35 @@ import 'package:lucide_icons/lucide_icons.dart';
 import '../../../../core/theme/design_tokens.dart';
 import 'home_sheet.dart';
 
-class HomeScreen extends StatelessWidget {
+class HomeScreen extends StatefulWidget {
   const HomeScreen({super.key});
 
+  @override
+  State<HomeScreen> createState() => _HomeScreenState();
+}
+
+class _HomeScreenState extends State<HomeScreen> {
+  final TextEditingController _messageController = TextEditingController();
+
+  bool get _hasMessage => _messageController.text.trim().isNotEmpty;
+
+  @override
+  void initState() {
+    super.initState();
+    _messageController.addListener(_onMessageChanged);
+  }
+
+  @override
+  void dispose() {
+    _messageController.removeListener(_onMessageChanged);
+    _messageController.dispose();
+    super.dispose();
+  }
+
+  void _onMessageChanged() {
+    setState(() {});
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -47,7 +73,7 @@ class HomeScreen extends StatelessWidget {
                     size: 24,
                     color: AppColors.slate900,
                   ),
-                  onPressed: () => context.push('/calendar/dayweek'),
+                  onPressed: () => context.push('/calendar/dayweek?from=home'),
                 ),
                 const SizedBox(width: 16),
                 IconButton(
@@ -153,10 +179,10 @@ class HomeScreen extends StatelessWidget {
 
   Widget _buildInputContainer(BuildContext context) {
     return Container(
-      height: 80,
       padding: const EdgeInsets.all(16),
       color: const Color(0xFFF8FAFC),
       child: Row(
+        crossAxisAlignment: CrossAxisAlignment.center,
         children: [
           GestureDetector(
             onTap: () => _showBottomSheet(context),
@@ -166,7 +192,7 @@ class HomeScreen extends StatelessWidget {
               decoration: BoxDecoration(
                 color: AppColors.white,
                 shape: BoxShape.circle,
-                border: Border.all(color: const Color(0xFFE2E8F0)),
+                border: Border.all(color: AppColors.slate300),
               ),
               child: const Icon(
                 LucideIcons.plus,
@@ -178,28 +204,40 @@ class HomeScreen extends StatelessWidget {
           const SizedBox(width: 8),
           Expanded(
             child: Container(
-              height: 48,
-              padding: const EdgeInsets.symmetric(horizontal: 16),
+              constraints: const BoxConstraints(minHeight: 48),
+              padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
               decoration: BoxDecoration(
-                color: AppColors.white,
+                color: Colors.transparent,
                 borderRadius: BorderRadius.circular(24),
+                border: Border.all(color: AppColors.slate300),
               ),
               child: Row(
+                crossAxisAlignment: CrossAxisAlignment.center,
                 children: [
-                  const Expanded(
+                  Expanded(
                     child: TextField(
-                      decoration: InputDecoration(
+                      controller: _messageController,
+                      minLines: 1,
+                      maxLines: 3,
+                      decoration: const InputDecoration(
                         hintText: '输入消息...',
                         border: InputBorder.none,
+                        enabledBorder: InputBorder.none,
+                        focusedBorder: InputBorder.none,
+                        disabledBorder: InputBorder.none,
+                        errorBorder: InputBorder.none,
+                        focusedErrorBorder: InputBorder.none,
                         isDense: true,
                         contentPadding: EdgeInsets.zero,
+                        filled: false,
                       ),
                     ),
                   ),
-                  const Icon(
-                    LucideIcons.mic,
-                    size: 20,
-                    color: AppColors.slate500,
+                  const SizedBox(width: 8),
+                  Icon(
+                    _hasMessage ? LucideIcons.send : LucideIcons.mic,
+                    size: 24,
+                    color: _hasMessage ? AppColors.blue600 : AppColors.slate500,
                   ),
                 ],
               ),