fix: patch P0 security vulnerabilities and critical UX issues across 6 modules

Security: Add admin/layout.tsx auth guard; Add requirePermission() to 12 admin pages

Dashboard: Fix StudentStatsGrid rendering; Fix teacher greeting; Add loading/error boundaries; Fix col-span; Add metadata

Announcements: Fix audience filtering; Add user detail page; Trigger notifications on publish; Pass classes data; Add loading.tsx

Messages: Implement soft delete; Add unread badge with polling; Add notification dropdown polling; Add keyword search; Add quiet hours DND

Management: Add loading/error for 9 admin routes; Fix admin-classes-view to use Select for school/grade

Profile/Settings: Add loading/error; Fix parent role routing; Create ParentSettingsView; Integrate AiProviderSettingsCard; Add Tab URL persistence; Add logout confirm; Add avatar; Fix Progress arbitrary class

Schema: Add senderDeletedAt/receiverDeletedAt to messages; Add quietHours to notificationPreferences; Add uniqueIndex import

Docs: Update architecture docs 004/005

src/modules/dashboard/components/student-dashboard/student-today-schedule-card.tsx

@@ -1,20 +1,59 @@
+"use client"
+
+import { useMemo } from "react"
+import Link from "next/link"
 import { CalendarDays, CalendarX } from "lucide-react"
 
+import { Button } from "@/shared/components/ui/button"
+import { Badge } from "@/shared/components/ui/badge"
 import { ScheduleList } from "@/shared/components/schedule/schedule-list"
 import { Card, CardContent, CardHeader, CardTitle } from "@/shared/components/ui/card"
 import { EmptyState } from "@/shared/components/ui/empty-state"
+import { cn } from "@/shared/lib/utils"
 import type { StudentTodayScheduleItem } from "@/modules/dashboard/types"
 
+/**
+ * Parse "HH:MM" time string into minutes since midnight for comparison.
+ */
+const timeToMinutes = (t: string): number => {
+  const [h, m] = t.split(":").map(Number)
+  return (h ?? 0) * 60 + (m ?? 0)
+}
+
 export function StudentTodayScheduleCard({ items }: { items: StudentTodayScheduleItem[] }) {
   const hasSchedule = items.length > 0
 
+  // Compute current/next class status based on client time
+  const { currentId, nextId } = useMemo(() => {
+    const now = new Date()
+    const nowMin = now.getHours() * 60 + now.getMinutes()
+    let currentId: string | null = null
+    let nextId: string | null = null
+    for (const item of items) {
+      const start = timeToMinutes(item.startTime)
+      const end = timeToMinutes(item.endTime)
+      if (nowMin >= start && nowMin < end) {
+        currentId = item.id
+        break
+      }
+      if (nowMin < start) {
+        nextId = item.id
+        break
+      }
+    }
+    return { currentId, nextId }
+  }, [items])
+
   return (
-    <Card className="lg:col-span-3">
-      <CardHeader>
+    <Card>
+      <CardHeader className="flex flex-row items-center justify-between">
         <CardTitle className="flex items-center gap-2">
           <CalendarDays className="h-4 w-4 text-muted-foreground" />
           Today&apos;s Schedule
         </CardTitle>
+        <Button asChild variant="outline" size="sm">
+          <Link href="/student/schedule">View all</Link>
+        </Button>
       </CardHeader>
       <CardContent>
         {!hasSchedule ? (
@@ -29,6 +68,30 @@ export function StudentTodayScheduleCard({ items }: { items: StudentTodaySchedul
             items={items}
             variant="separator"
             spacingClassName="space-y-4"
+            renderTrailing={(item) => {
+              const isCurrent = item.id === currentId
+              const isNext = item.id === nextId
+              if (isCurrent) {
+                return (
+                  <Badge className="shrink-0 bg-emerald-500 text-white hover:bg-emerald-500">
+                    In Progress
+                  </Badge>
+                )
+              }
+              if (isNext) {
+                return (
+                  <Badge variant="outline" className="shrink-0 border-primary text-primary">
+                    Up Next
+                  </Badge>
+                )
+              }
+              return item.className ? (
+                <Badge variant="secondary" className="shrink-0">
+                  {item.className}
+                </Badge>
+              ) : null
+            }}
+            className={cn(currentId && "[&_div:first-child]:bg-emerald-50/50")}
           />
         )}
       </CardContent>