style(ui): 统一页面字号间距与状态样式

lib/pages/account/account_devices_page.dart

@@ -11,6 +11,7 @@ import '../../core/data/services/auth_controller.dart';
 import '../../core/formatting/error_text.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 '../../core/widgets/empty_state.dart';
@@ -58,12 +59,15 @@ class _AccountDevicesPageState extends State<AccountDevicesPage> {
           foregroundColor: AppColors.onPrimary,
           title: Text(l10n.accountDevices),
         ),
-        body: signedIn
-            ? ListenableBuilder(
-                listenable: _logic,
-                builder: (context, _) => _body(l10n),
-              )
-            : const AuthGatePanel(),
+        body: SafeArea(
+          top: false,
+          child: signedIn
+              ? ListenableBuilder(
+                  listenable: _logic,
+                  builder: (context, _) => _body(l10n),
+                )
+              : const AuthGatePanel(),
+        ),
       ),
     );
   }
@@ -109,10 +113,10 @@ class _DeviceTile extends StatelessWidget {
   Widget build(BuildContext context) {
     return Container(
       key: ValueKey('account-device-${device.id}'),
-      padding: const EdgeInsets.all(14),
+      padding: const EdgeInsets.all(AppDimens.cardPadding),
       decoration: BoxDecoration(
         color: AppColors.card,
-        borderRadius: BorderRadius.circular(14),
+        borderRadius: BorderRadius.circular(AppDimens.cardRadius),
         border: Border.all(color: AppColors.outlineVariantDark),
       ),
       child: Column(
@@ -131,7 +135,7 @@ class _DeviceTile extends StatelessWidget {
                       ? device.platform
                       : device.deviceModel,
                   style: const TextStyle(
-                    fontSize: 15,
+                    fontSize: AppDimens.listTitle,
                     fontWeight: FontWeight.w700,
                   ),
                 ),
@@ -164,14 +168,17 @@ class _DeviceTile extends StatelessWidget {
         Expanded(
           child: Text(
             label,
-            style: const TextStyle(color: AppColors.muted, fontSize: 12),
+            style: const TextStyle(
+              color: AppColors.muted,
+              fontSize: AppDimens.caption,
+            ),
           ),
         ),
         Flexible(
           child: Text(
             value.isEmpty ? '-' : value,
             textAlign: TextAlign.right,
-            style: const TextStyle(fontSize: 12),
+            style: const TextStyle(fontSize: AppDimens.caption),
           ),
         ),
       ],
@@ -188,20 +195,19 @@ class _StatusChip extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final active = status.toLowerCase() == 'active';
-    final scheme = Theme.of(context).colorScheme;
     return Container(
       padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
       decoration: BoxDecoration(
         color: active
-            ? scheme.tertiary.withValues(alpha: 0.16)
+            ? AppColors.gold.withValues(alpha: 0.16)
             : AppColors.raised,
-        borderRadius: BorderRadius.circular(10),
+        borderRadius: BorderRadius.circular(AppDimens.pillRadius),
       ),
       child: Text(
         active ? l10n.accountDeviceActive : l10n.accountDeviceInactive,
         style: TextStyle(
-          color: active ? scheme.tertiary : AppColors.muted,
-          fontSize: 11,
+          color: active ? AppColors.gold : AppColors.muted,
+          fontSize: AppDimens.caption,
         ),
       ),
     );