fix(teacher): 统一详情页返回路径与中英文文案 (P1-3+P2-1)

P1-3: empty-state 默认按钮 variant 改为 outline 并新增 variant prop；button.tsx 导出 ButtonProps；统一 5 个详情页返回路径为 ghost+ArrowLeft+文字标签；course-plan-detail raw a 改为 Link。P2-1: formatLongDate 默认 locale 改为 zh-CN，weekday 改为 short；返回按钮文案中文化；course-plan-detail 全量中文化；grades/analytics 标题中文化。验证：tsc 0 错误，lint 0 错误，架构图 004/005 已同步。

src/modules/course-plans/components/course-plan-detail.tsx

@@ -2,6 +2,7 @@
 
 import { useState } from "react"
 import { useRouter } from "next/navigation"
+import Link from "next/link"
 import { toast } from "sonner"
 import { ArrowLeft, Pencil, Plus, Trash2 } from "lucide-react"
 
@@ -16,16 +17,7 @@ import {
   TableHeader,
   TableRow,
 } from "@/shared/components/ui/table"
-import {
-  AlertDialog,
-  AlertDialogAction,
-  AlertDialogCancel,
-  AlertDialogContent,
-  AlertDialogDescription,
-  AlertDialogFooter,
-  AlertDialogHeader,
-  AlertDialogTitle,
-} from "@/shared/components/ui/alert-dialog"
+import { ConfirmDeleteDialog } from "@/shared/components/ui/confirm-delete-dialog"
 import { usePermission } from "@/shared/hooks/use-permission"
 import { Permissions } from "@/shared/types/permissions"
 import { formatDate } from "@/shared/lib/utils"
@@ -36,10 +28,10 @@ import { deleteCoursePlanAction } from "../actions"
 import type { CoursePlanWithItems, CoursePlanStatus } from "../types"
 
 const STATUS_LABEL: Record<CoursePlanStatus, string> = {
-  planning: "Planning",
-  active: "Active",
-  completed: "Completed",
-  paused: "Paused",
+  planning: "规划中",
+  active: "进行中",
+  completed: "已完成",
+  paused: "已暂停",
 }
 
 export function CoursePlanDetail({
@@ -72,10 +64,10 @@ export function CoursePlanDetail({
         router.push(base)
         router.refresh()
       } else {
-        toast.error(res.message || "Failed to delete")
+        toast.error(res.message || "删除失败")
       }
     } catch {
-      toast.error("Failed to delete")
+      toast.error("删除失败")
     } finally {
       setIsWorking(false)
       setDeleteOpen(false)
@@ -94,51 +86,52 @@ export function CoursePlanDetail({
 
   return (
     <div className="space-y-6">
-      <div className="flex items-center justify-between gap-2">
-        <div className="flex items-center gap-2">
-          {backHref ? (
-            <Button asChild variant="ghost" size="icon">
-              <a href={backHref}>
-                <ArrowLeft className="h-4 w-4" />
-              </a>
-            </Button>
-          ) : null}
-          <h2 className="text-2xl font-bold tracking-tight">Course Plan</h2>
-        </div>
-        {canManage ? (
-          <div className="flex flex-wrap items-center gap-2">
-            {editHref ? (
-              <Button asChild variant="outline">
-                <a href={editHref}>
-                  <Pencil className="mr-2 h-4 w-4" />
-                  Edit
-                </a>
-              </Button>
-            ) : null}
-            <Button onClick={() => setDeleteOpen(true)} disabled={isWorking} variant="destructive">
-              <Trash2 className="mr-2 h-4 w-4" />
-              Delete
-            </Button>
-          </div>
+      <div className="flex flex-col gap-3">
+        {backHref ? (
+          <Button asChild variant="ghost" size="sm" className="w-fit">
+            <Link href={backHref}>
+              <ArrowLeft className="mr-2 h-4 w-4" aria-hidden="true" />
+              返回课程计划列表
+            </Link>
+          </Button>
         ) : null}
+        <div className="flex items-center justify-between gap-2">
+          <h2 className="text-2xl font-bold tracking-tight">课程计划</h2>
+          {canManage ? (
+            <div className="flex flex-wrap items-center gap-2">
+              {editHref ? (
+                <Button asChild variant="outline">
+                  <Link href={editHref}>
+                    <Pencil className="mr-2 h-4 w-4" />
+                    编辑
+                  </Link>
+                </Button>
+              ) : null}
+              <Button onClick={() => setDeleteOpen(true)} disabled={isWorking} variant="destructive">
+                <Trash2 className="mr-2 h-4 w-4" />
+                删除
+              </Button>
+            </div>
+          ) : null}
+        </div>
       </div>
 
       <Card>
         <CardHeader className="space-y-2">
           <div className="flex flex-wrap items-center gap-2">
-            <Badge variant="outline">{plan.className ?? "No class"}</Badge>
-            <Badge variant="outline">{plan.subjectName ?? "Unknown subject"}</Badge>
+            <Badge variant="outline">{plan.className ?? "无班级"}</Badge>
+            <Badge variant="outline">{plan.subjectName ?? "未知学科"}</Badge>
             <Badge>{STATUS_LABEL[plan.status]}</Badge>
-            <Badge variant="outline">Semester {plan.semester}</Badge>
+            <Badge variant="outline">第 {plan.semester} 学期</Badge>
           </div>
           <CardTitle className="text-xl">
-            {plan.subjectName ?? "Course Plan"} — {plan.className ?? "No Class"}
+            {plan.subjectName ?? "课程计划"} — {plan.className ?? "无班级"}
           </CardTitle>
           <div className="flex flex-wrap items-center gap-2 text-xs text-muted-foreground">
-            <span>Teacher: {plan.teacherName ?? "Unassigned"}</span>
-            <span>· Created {formatDate(plan.createdAt)}</span>
-            {plan.startDate ? <span>· Start {formatDate(plan.startDate)}</span> : null}
-            {plan.endDate ? <span>· End {formatDate(plan.endDate)}</span> : null}
+            <span>教师：{plan.teacherName ?? "未分配"}</span>
+            <span>· 创建于 {formatDate(plan.createdAt)}</span>
+            {plan.startDate ? <span>· 开始 {formatDate(plan.startDate)}</span> : null}
+            {plan.endDate ? <span>· 结束 {formatDate(plan.endDate)}</span> : null}
           </div>
         </CardHeader>
         <CardContent className="space-y-4">
@@ -150,13 +143,13 @@ export function CoursePlanDetail({
           />
           {plan.syllabus ? (
             <div className="space-y-1">
-              <h4 className="text-sm font-semibold">Syllabus</h4>
+              <h4 className="text-sm font-semibold">教学大纲</h4>
               <p className="whitespace-pre-wrap text-sm text-muted-foreground">{plan.syllabus}</p>
             </div>
           ) : null}
           {plan.objectives ? (
             <div className="space-y-1">
-              <h4 className="text-sm font-semibold">Objectives</h4>
+              <h4 className="text-sm font-semibold">教学目标</h4>
               <p className="whitespace-pre-wrap text-sm text-muted-foreground">{plan.objectives}</p>
             </div>
           ) : null}
@@ -165,28 +158,28 @@ export function CoursePlanDetail({
 
       <Card>
         <CardHeader className="flex flex-row items-center justify-between space-y-0">
-          <CardTitle>Weekly Plan</CardTitle>
+          <CardTitle>周计划</CardTitle>
           {canManage ? (
             <Button onClick={openCreateEditor} size="sm">
               <Plus className="mr-2 h-4 w-4" />
-              Add Week
+              添加周计划
             </Button>
           ) : null}
         </CardHeader>
         <CardContent>
           {plan.items.length === 0 ? (
             <p className="py-6 text-center text-sm text-muted-foreground">
-              No weekly plans yet. {canManage ? "Click \"Add Week\" to create one." : ""}
+              暂无周计划。{canManage ? "点击「添加周计划」创建第一条。" : ""}
             </p>
           ) : (
             <Table>
               <TableHeader>
                 <TableRow>
-                  <TableHead className="w-16">Week</TableHead>
-                  <TableHead>Topic</TableHead>
-                  <TableHead className="w-20">Hours</TableHead>
-                  <TableHead className="w-32">Chapter</TableHead>
-                  <TableHead className="w-28">Status</TableHead>
+                  <TableHead className="w-16">周次</TableHead>
+                  <TableHead>主题</TableHead>
+                  <TableHead className="w-20">课时</TableHead>
+                  <TableHead className="w-32">章节</TableHead>
+                  <TableHead className="w-28">状态</TableHead>
                 </TableRow>
               </TableHeader>
               <TableBody>
@@ -207,7 +200,7 @@ export function CoursePlanDetail({
                         ) : null}
                         {item.notes ? (
                           <p className="text-xs text-muted-foreground italic">
-                            Note: {item.notes}
+                            备注：{item.notes}
                           </p>
                         ) : null}
                       </div>
@@ -218,7 +211,7 @@ export function CoursePlanDetail({
                     </TableCell>
                     <TableCell>
                       <Badge variant={item.isCompleted ? "default" : "secondary"}>
-                        {item.isCompleted ? "Done" : "Pending"}
+                        {item.isCompleted ? "已完成" : "待完成"}
                       </Badge>
                     </TableCell>
                   </TableRow>
@@ -237,22 +230,14 @@ export function CoursePlanDetail({
         onOpenChange={setEditorOpen}
       />
 
-      <AlertDialog open={deleteOpen} onOpenChange={setDeleteOpen}>
-        <AlertDialogContent>
-          <AlertDialogHeader>
-            <AlertDialogTitle>Delete course plan</AlertDialogTitle>
-            <AlertDialogDescription>
-              This will permanently delete this course plan and all its weekly plans.
-            </AlertDialogDescription>
-          </AlertDialogHeader>
-          <AlertDialogFooter>
-            <AlertDialogCancel disabled={isWorking}>Cancel</AlertDialogCancel>
-            <AlertDialogAction onClick={handleDelete} disabled={isWorking}>
-              Delete
-            </AlertDialogAction>
-          </AlertDialogFooter>
-        </AlertDialogContent>
-      </AlertDialog>
+      <ConfirmDeleteDialog
+        open={deleteOpen}
+        onOpenChange={setDeleteOpen}
+        title="删除课程计划"
+        description="此操作将永久删除该课程计划及其所有周计划。"
+        onConfirm={handleDelete}
+        isWorking={isWorking}
+      />
     </div>
   )
 }