style(ui): 统一页面字号间距与状态样式

lib/pages/account/account_deactivate_page.dart

@@ -9,6 +9,7 @@ import '../../core/data/repositories/account_repository.dart';
 import '../../core/data/services/auth_controller.dart';
 import '../../core/formatting/localized_date_time.dart';
 import '../../core/theme/app_colors.dart';
+import '../../core/theme/app_dimens.dart';
 import '../../core/theme/app_theme.dart';
 import '../../core/widgets/auth_gate.dart';
 import '../../l10n/app_localizations.dart';
@@ -58,12 +59,15 @@ class _AccountDeactivatePageState extends State<AccountDeactivatePage> {
           foregroundColor: AppColors.onPrimary,
           title: Text(l10n.accountDeactivate),
         ),
-        body: canShow
-            ? ListenableBuilder(
-                listenable: _logic,
-                builder: (context, _) => _body(l10n),
-              )
-            : const AuthGatePanel(),
+        body: SafeArea(
+          top: false,
+          child: canShow
+              ? ListenableBuilder(
+                  listenable: _logic,
+                  builder: (context, _) => _body(l10n),
+                )
+              : const AuthGatePanel(),
+        ),
       ),
     );
   }
@@ -90,7 +94,7 @@ class _AccountDeactivatePageState extends State<AccountDeactivatePage> {
       padding: const EdgeInsets.all(16),
       decoration: BoxDecoration(
         color: errorColor.withValues(alpha: 0.10),
-        borderRadius: BorderRadius.circular(14),
+        borderRadius: BorderRadius.circular(AppDimens.cardRadius),
         border: Border.all(color: errorColor.withValues(alpha: 0.35)),
       ),
       child: Text(
@@ -105,7 +109,7 @@ class _AccountDeactivatePageState extends State<AccountDeactivatePage> {
     padding: const EdgeInsets.all(16),
     decoration: BoxDecoration(
       color: AppColors.card,
-      borderRadius: BorderRadius.circular(14),
+      borderRadius: BorderRadius.circular(AppDimens.cardRadius),
     ),
     child: Text(
       l10n.accountScheduledFor(
@@ -161,7 +165,10 @@ class _AccountDeactivatePageState extends State<AccountDeactivatePage> {
 
   Widget _errorText(String value) => Text(
     value,
-    style: TextStyle(color: Theme.of(context).colorScheme.error, fontSize: 12),
+    style: TextStyle(
+      color: Theme.of(context).colorScheme.error,
+      fontSize: AppDimens.caption,
+    ),
   );
 
   Future<void> _confirm() async {