feat(apps): refine login consent and calendar day/month UX

apps/lib/features/calendar/ui/screens/calendar_month_screen.dart

@@ -107,6 +107,9 @@ class _CalendarMonthScreenState extends State<CalendarMonthScreen>
   }
 
   Widget _buildHeader() {
+    final today = DateTime.now();
+    final isNotToday = !isSameDay(_selectedDate, today);
+
     return SizedBox(
       height: 76,
       child: Padding(
@@ -148,6 +151,31 @@ class _CalendarMonthScreenState extends State<CalendarMonthScreen>
                     ),
                   ),
                   const Spacer(),
+                  if (isNotToday)
+                    AppPressable(
+                      borderRadius: BorderRadius.circular(AppRadius.xl),
+                      onTap: _goToToday,
+                      child: Container(
+                        height: 36,
+                        padding: const EdgeInsets.symmetric(horizontal: 12),
+                        decoration: BoxDecoration(
+                          color: AppColors.messageBtnWrap,
+                          borderRadius: BorderRadius.circular(AppRadius.xl),
+                          border: Border.all(color: AppColors.messageBtnBorder),
+                        ),
+                        child: const Center(
+                          child: Text(
+                            '今天',
+                            style: TextStyle(
+                              fontSize: 14,
+                              fontWeight: FontWeight.w600,
+                              color: AppColors.slate700,
+                            ),
+                          ),
+                        ),
+                      ),
+                    ),
+                  if (isNotToday) const SizedBox(width: 8),
                   AppPressable(
                     borderRadius: BorderRadius.circular(AppRadius.full),
                     onTap: () async {
@@ -181,6 +209,20 @@ class _CalendarMonthScreenState extends State<CalendarMonthScreen>
     );
   }
 
+  void _goToToday() {
+    final today = DateTime.now();
+    final targetMonth = DateTime(today.year, today.month, 1);
+    setState(() {
+      _selectedDate = today;
+      if (_currentMonth.year != targetMonth.year ||
+          _currentMonth.month != targetMonth.month) {
+        _currentMonth = targetMonth;
+      }
+    });
+    _calendarManager.setSelectedDate(today);
+    _loadMonthEvents(forceRefresh: true);
+  }
+
   Widget _buildMonthContent() {
     return Column(
       children: [
@@ -280,9 +322,7 @@ class _CalendarMonthScreenState extends State<CalendarMonthScreen>
                     '${AppRoutes.calendarDayWeek}?date=${formatYmd(date)}',
                   );
                 },
-                child: AnimatedContainer(
-                  duration: const Duration(milliseconds: 140),
-                  curve: Curves.easeOut,
+                child: Container(
                   width: 36,
                   height: 36,
                   decoration: BoxDecoration(