feat(ui): 登录页重设计并统一弹框主题渐变外壳

lib/pages/auth/phone_auth_sheet.dart

@@ -11,6 +11,7 @@ import '../../core/data/services/auth_controller.dart';
 import '../../core/platform/haptics.dart';
 import '../../core/platform/keyboard_inset.dart';
 import '../../core/theme/app_colors.dart';
+import '../../core/widgets/app_glow_panel.dart';
 import '../../core/widgets/centered_toast.dart';
 import '../../l10n/app_localizations.dart';
 
@@ -252,15 +253,15 @@ class _PhoneAuthSheetState extends State<PhoneAuthSheet> {
     final bottom = effectiveKeyboardInset(context, _keyboardInset);
     return Padding(
       padding: EdgeInsets.only(bottom: bottom),
-      child: Container(
-        key: const Key('phone-auth-sheet'),
-        decoration: const BoxDecoration(
-          color: AppColors.card,
-          borderRadius: BorderRadius.vertical(
-            top: Radius.circular(_sheetRadius),
-          ),
+      child: AppGlowPanel(
+        borderRadius: const BorderRadius.vertical(
+          top: Radius.circular(_sheetRadius),
         ),
-        child: SingleChildScrollView(
+        border: false,
+        child: Container(
+          key: const Key('phone-auth-sheet'),
+          decoration: const BoxDecoration(color: AppColors.transparent),
+          child: SingleChildScrollView(
           controller: _scrollController,
           padding: const EdgeInsets.fromLTRB(22, 10, 22, 26),
           child: Column(
@@ -313,6 +314,7 @@ class _PhoneAuthSheetState extends State<PhoneAuthSheet> {
             ],
           ),
         ),
+        ),
       ),
     );
   }
@@ -403,7 +405,7 @@ class _PhoneAuthSheetState extends State<PhoneAuthSheet> {
       key: const Key('auth-phone-submit'),
       onPressed: _submitting ? null : _submit,
       style: FilledButton.styleFrom(
-        backgroundColor: AppColors.blue,
+        backgroundColor: AppColors.brandRed,
         foregroundColor: AppColors.onPrimary,
         shape: RoundedRectangleBorder(
           borderRadius: BorderRadius.circular(_buttonHeight / 2),
@@ -439,7 +441,7 @@ class _PhoneAuthSheetState extends State<PhoneAuthSheet> {
     ),
     focusedBorder: OutlineInputBorder(
       borderRadius: BorderRadius.circular(_fieldRadius),
-      borderSide: const BorderSide(color: AppColors.blue, width: 1.5),
+      borderSide: const BorderSide(color: AppColors.brandRed, width: 1.5),
     ),
   );
 }