refactor(alert-settings): integrate AppShell layout and update cache version

- Replace custom page layout with AppShell component for consistent UI
- Remove unused PageHeader and UpdateAlertConditionDto imports
- Update service worker cache names and version.json to new timestamp

src/app/calendar/page.tsx

@@ -5,10 +5,11 @@ import { api } from '@/lib/api'
 import { getCurrentPersianYear } from '@/lib/date/persian-date'
 import { Calendar as CalendarIcon, Database, TrendingUp } from 'lucide-react'
 import Loading from '@/components/Loading'
-import { PageHeader, BackLink, Card } from '@/components/common'
+import { Card } from '@/components/common'
 import { YearSelector } from '@/components/calendar'
 import { MonthCard } from '@/components/cards'
 import { StatsCard } from '@/components/cards'
+import { AppShell } from '@/components/layout'
 
 const monthNames = ['فروردین', 'اردیبهشت', 'خرداد', 'تیر', 'مرداد', 'شهریور', 'مهر', 'آبان', 'آذر', 'دی', 'بهمن', 'اسفند']
 
@@ -75,16 +76,12 @@ export default function CalendarPage() {
     }
 
     return (
-        <div className="min-h-screen p-4 md:p-6">
+        <AppShell
+            pageTitle="انتخاب سال و ماه"
+            pageIcon={CalendarIcon}
+            iconGradient="from-green-500 to-green-600"
+        >
             <div className="max-w-6xl mx-auto">
-                {/* Header */}
-                <BackLink href="/" label="بازگشت به صفحه اصلی" />
-                <PageHeader
-                    icon={CalendarIcon}
-                    title="انتخاب سال و ماه"
-                    iconGradient="from-green-500 to-green-600"
-                />
-
                 {/* Main Card */}
                 <Card padding="lg">
                     {/* Year Selector */}
@@ -130,6 +127,6 @@ export default function CalendarPage() {
                     </div>
                 </Card>
             </div>
-        </div>
+        </AppShell>
     )
 }