feat: 添加日历事件订阅者功能及权限重构

apps/lib/features/calendar/presentation/widgets/create_event_sheet.dart

@@ -1,7 +1,9 @@
 import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
 import 'package:lucide_icons/lucide_icons.dart';
 import 'package:social_app/core/l10n/l10n.dart';
 import '../../../../app/di/injection.dart';
+import '../../../../app/router/app_routes.dart';
 import '../../../../core/theme/design_tokens.dart';
 import '../../../../shared/widgets/app_loading_indicator.dart';
 import '../../../../shared/widgets/app_selection_sheet.dart';
@@ -215,7 +217,7 @@ class _CreateEventSheetState extends State<CreateEventSheet>
       title: _isEditing
           ? context.l10n.calendarCreateEditTitle
           : context.l10n.calendarCreateNewTitle,
-      onBack: () => Navigator.of(context).pop(),
+      onBack: () => _closeSheet(),
       trailing: ValueListenableBuilder<TextEditingValue>(
         valueListenable: _titleController,
         builder: (context, value, child) {
@@ -264,7 +266,7 @@ class _CreateEventSheetState extends State<CreateEventSheet>
             width: AppSpacing.xxl * 2,
             height: AppSpacing.xxl * 2,
             child: TextButton(
-              onPressed: () => Navigator.pop(context),
+              onPressed: _closeSheet,
               style: TextButton.styleFrom(
                 padding: const EdgeInsets.all(AppSpacing.none),
                 shape: RoundedRectangleBorder(
@@ -783,6 +785,8 @@ class _CreateEventSheetState extends State<CreateEventSheet>
       metadata: metadata,
     );
 
+    var saved = false;
+
     try {
       final service = sl<CalendarService>();
 
@@ -792,10 +796,9 @@ class _CreateEventSheetState extends State<CreateEventSheet>
         await service.addEvent(event);
       }
 
+      saved = true;
+
       widget.onSaved?.call();
-      if (mounted) {
-        Navigator.pop(context, true);
-      }
     } catch (e) {
       if (mounted) {
         Toast.show(
@@ -811,5 +814,29 @@ class _CreateEventSheetState extends State<CreateEventSheet>
         });
       }
     }
+
+    if (saved && mounted) {
+      _closeSheet(result: true);
+    }
+  }
+
+  void _closeSheet({Object? result}) {
+    if (!mounted) {
+      return;
+    }
+
+    final navigator = Navigator.of(context);
+    if (navigator.canPop()) {
+      navigator.pop(result);
+      return;
+    }
+
+    final router = GoRouter.of(context);
+    if (router.canPop()) {
+      context.pop(result);
+      return;
+    }
+
+    context.go(AppRoutes.homeMain);
   }
 }