feat(modules): add leave-requests, invitation-codes, and standards modules

- Add leave-requests module for staff and student leave request management

- Add invitation-codes module for class invitation code generation and redemption

- Add standards module for curriculum standards management

src/modules/leave-requests/components/leave-request-list.tsx

@@ -0,0 +1,117 @@
+"use client"
+
+import { useTranslations } from "next-intl"
+import { CalendarDays, CheckCircle2, XCircle, Clock, Ban } from "lucide-react"
+
+import { Badge } from "@/shared/components/ui/badge"
+import { Card, CardContent, CardHeader, CardTitle } from "@/shared/components/ui/card"
+import { EmptyState } from "@/shared/components/ui/empty-state"
+import type { LeaveRequestListItem, LeaveStatus, LeaveType } from "../types"
+
+type IconKey = "clock" | "check" | "x" | "ban"
+
+const STATUS_STYLES: Record<LeaveStatus, { variant: "default" | "secondary" | "destructive" | "outline"; iconKey: IconKey }> = {
+  pending: { variant: "secondary", iconKey: "clock" },
+  approved: { variant: "default", iconKey: "check" },
+  rejected: { variant: "destructive", iconKey: "x" },
+  cancelled: { variant: "outline", iconKey: "ban" },
+}
+
+const STATUS_ICONS: Record<IconKey, typeof Clock> = {
+  clock: Clock,
+  check: CheckCircle2,
+  x: XCircle,
+  ban: Ban,
+}
+
+/**
+ * 请假申请列表（只读展示）。
+ *
+ * 适用于家长/学生查看自己的请假记录，教师查看本班请假（审批操作走 LeaveReviewDialog）。
+ */
+export function LeaveRequestList({
+  items,
+  emptyTitle,
+  emptyDescription,
+}: {
+  items: LeaveRequestListItem[]
+  emptyTitle: string
+  emptyDescription: string
+}) {
+  const t = useTranslations("leave")
+
+  if (items.length === 0) {
+    return (
+      <EmptyState
+        icon={CalendarDays}
+        title={emptyTitle}
+        description={emptyDescription}
+        className="border-none shadow-none"
+      />
+    )
+  }
+
+  return (
+    <div className="space-y-3">
+      {items.map((item) => {
+        const meta = STATUS_STYLES[item.status]
+        const Icon = STATUS_ICONS[meta.iconKey]
+        return (
+          <Card key={item.id}>
+            <CardHeader className="pb-3">
+              <div className="flex items-start justify-between gap-3">
+                <div className="space-y-1">
+                  <CardTitle className="text-base flex items-center gap-2">
+                    <Icon className="h-4 w-4 text-muted-foreground" aria-hidden />
+                    <span>{item.studentName}</span>
+                    <span className="text-muted-foreground font-normal">·</span>
+                    <span className="text-muted-foreground font-normal">{item.className}</span>
+                  </CardTitle>
+                  <p className="text-sm text-muted-foreground">
+                    {t("types." + item.leaveType)} · {item.startDate} ~ {item.endDate}
+                  </p>
+                </div>
+                <Badge variant={meta.variant}>
+                  {t("status." + item.status)}
+                </Badge>
+              </div>
+            </CardHeader>
+            <CardContent className="space-y-2">
+              <div className="text-sm">
+                <span className="text-muted-foreground">{t("list.reason")}：</span>
+                <span>{item.reason}</span>
+              </div>
+              {item.reviewerName && item.reviewedAt && (
+                <div className="text-sm text-muted-foreground">
+                  {t("list.reviewedBy", { name: item.reviewerName, date: item.reviewedAt.slice(0, 10) })}
+                </div>
+              )}
+              {item.reviewComment && (
+                <div className="rounded-md bg-muted/50 p-2 text-sm">
+                  <span className="text-muted-foreground">{t("list.reviewComment")}：</span>
+                  <span>{item.reviewComment}</span>
+                </div>
+              )}
+              {item.attendanceSynced && (
+                <div className="text-xs text-emerald-600 dark:text-emerald-400">
+                  {t("list.attendanceSynced")}
+                </div>
+              )}
+            </CardContent>
+          </Card>
+        )
+      })}
+    </div>
+  )
+}
+
+/** 请假类型中文标签（复用工具函数，避免重复定义）。 */
+export function leaveTypeLabel(type: LeaveType): string {
+  const labels: Record<LeaveType, string> = {
+    sick: "病假",
+    personal: "事假",
+    family: "家庭事务",
+    other: "其他",
+  }
+  return labels[type] ?? type
+}