完整性更新

现在已经实现了大部分基础功能

src/app/(dashboard)/student/learning/textbooks/[id]/page.tsx

@@ -0,0 +1,78 @@
+import Link from "next/link"
+import { notFound } from "next/navigation"
+
+import { ArrowLeft, BookOpen, Inbox } from "lucide-react"
+
+import { getTextbookById, getChaptersByTextbookId } from "@/modules/textbooks/data-access"
+import { TextbookReader } from "@/modules/textbooks/components/textbook-reader"
+import { Badge } from "@/shared/components/ui/badge"
+import { Button } from "@/shared/components/ui/button"
+import { EmptyState } from "@/shared/components/ui/empty-state"
+import { getDemoStudentUser } from "@/modules/homework/data-access"
+
+export const dynamic = "force-dynamic"
+
+export default async function StudentTextbookDetailPage({
+  params,
+}: {
+  params: Promise<{ id: string }>
+}) {
+  const student = await getDemoStudentUser()
+  if (!student) {
+    return (
+      <div className="h-full flex-1 flex-col space-y-8 p-8 md:flex">
+        <div className="flex items-center justify-between space-y-2">
+          <div>
+            <h2 className="text-2xl font-bold tracking-tight">Textbook</h2>
+            <p className="text-muted-foreground">Read chapters and review content.</p>
+          </div>
+        </div>
+        <EmptyState title="No user found" description="Create a student user to read textbooks." icon={Inbox} />
+      </div>
+    )
+  }
+
+  const { id } = await params
+
+  const [textbook, chapters] = await Promise.all([getTextbookById(id), getChaptersByTextbookId(id)])
+
+  if (!textbook) notFound()
+
+  return (
+    <div className="flex h-[calc(100vh-4rem)] flex-col overflow-hidden">
+      <div className="flex items-center gap-4 border-b bg-background py-4 shrink-0 z-10">
+        <Button variant="ghost" size="icon" asChild>
+          <Link href="/student/learning/textbooks">
+            <ArrowLeft className="h-4 w-4" />
+          </Link>
+        </Button>
+        <div className="flex-1 min-w-0">
+          <div className="flex items-center gap-2 mb-1">
+            <Badge variant="outline">{textbook.subject}</Badge>
+            <span className="text-xs text-muted-foreground uppercase tracking-wider font-medium">
+              {textbook.grade ?? "-"}
+            </span>
+          </div>
+          <h1 className="text-xl font-bold tracking-tight line-clamp-1">{textbook.title}</h1>
+        </div>
+      </div>
+
+      <div className="flex-1 overflow-hidden pt-6">
+        {chapters.length === 0 ? (
+          <div className="px-8">
+            <EmptyState
+              icon={BookOpen}
+              title="No chapters"
+              description="This textbook has no chapters yet."
+              className="bg-card"
+            />
+          </div>
+        ) : (
+          <div className="h-[calc(100vh-140px)] px-8 min-h-0">
+            <TextbookReader chapters={chapters} />
+          </div>
+        )}
+      </div>
+    </div>
+  )
+}