feat(flutter): 剧场页按参考图重做

lib/pages/discover/widgets/discover_header.dart

@@ -2,12 +2,10 @@
 
 import 'package:flutter/material.dart';
 
-import '../../../core/theme/app_colors.dart';
 import '../../../core/theme/app_dimens.dart';
-import '../../../l10n/app_localizations.dart';
 import 'discover_search_field.dart';
 
-/// 剧场页页头：搜索与头像入口。
+/// 剧场页页头：整行搜索框（内嵌识剧入口）。
 class DiscoverHeader extends StatelessWidget {
   const DiscoverHeader({
     super.key,
@@ -15,64 +13,26 @@ class DiscoverHeader extends StatelessWidget {
     required this.focusNode,
     required this.onChanged,
     required this.loading,
-    required this.onProfile,
+    required this.onIdentify,
   });
 
   final TextEditingController controller;
   final FocusNode focusNode;
   final ValueChanged<String> onChanged;
   final bool loading;
-  final VoidCallback onProfile;
+  final VoidCallback onIdentify;
 
   @override
   Widget build(BuildContext context) {
-    final l10n = AppLocalizations.of(context)!;
     return SizedBox(
       height: AppDimens.contentHeaderHeight,
-      child: Padding(
-        padding: const EdgeInsets.symmetric(
-          horizontal: AppDimens.pageHorizontal,
-        ),
-        child: Row(
-          children: [
-            Expanded(
-              child: DiscoverSearchField(
-                controller: controller,
-                focusNode: focusNode,
-                onChanged: onChanged,
-                loading: loading,
-                horizontalPadding: 0,
-              ),
-            ),
-            const SizedBox(width: AppDimens.spaceSm),
-            _profile(l10n),
-          ],
-        ),
-      ),
-    );
-  }
-
-  Widget _profile(AppLocalizations l10n) {
-    return Semantics(
-      button: true,
-      label: l10n.myTab,
-      child: InkWell(
-        key: const Key('discover-profile'),
-        customBorder: const CircleBorder(),
-        onTap: onProfile,
-        child: Container(
-          width: AppDimens.tapTarget,
-          height: AppDimens.tapTarget,
-          decoration: BoxDecoration(
-            color: AppColors.card,
-            shape: BoxShape.circle,
-            border: Border.all(color: AppColors.border),
-          ),
-          child: const Icon(
-            Icons.person_rounded,
-            color: AppColors.onSurface,
-            size: AppDimens.accountIcon,
-          ),
+      child: Center(
+        child: DiscoverSearchField(
+          controller: controller,
+          focusNode: focusNode,
+          onChanged: onChanged,
+          loading: loading,
+          onIdentify: onIdentify,
         ),
       ),
     );