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/page.tsx

@@ -0,0 +1,80 @@
+import { BookOpen, Inbox } from "lucide-react"
+
+import { getTextbooks } from "@/modules/textbooks/data-access"
+import { TextbookCard } from "@/modules/textbooks/components/textbook-card"
+import { TextbookFilters } from "@/modules/textbooks/components/textbook-filters"
+import { getDemoStudentUser } from "@/modules/homework/data-access"
+import { EmptyState } from "@/shared/components/ui/empty-state"
+import { Button } from "@/shared/components/ui/button"
+import Link from "next/link"
+
+export const dynamic = "force-dynamic"
+
+type SearchParams = { [key: string]: string | string[] | undefined }
+
+const getParam = (params: SearchParams, key: string) => {
+  const v = params[key]
+  return Array.isArray(v) ? v[0] : v
+}
+
+export default async function StudentTextbooksPage({
+  searchParams,
+}: {
+  searchParams: Promise<SearchParams>
+}) {
+  const [student, sp] = await Promise.all([getDemoStudentUser(), searchParams])
+
+  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">Textbooks</h2>
+            <p className="text-muted-foreground">Browse your course textbooks.</p>
+          </div>
+        </div>
+        <EmptyState title="No user found" description="Create a student user to see textbooks." icon={Inbox} />
+      </div>
+    )
+  }
+
+  const q = getParam(sp, "q") || undefined
+  const subject = getParam(sp, "subject") || undefined
+  const grade = getParam(sp, "grade") || undefined
+
+  const textbooks = await getTextbooks(q, subject, grade)
+  const hasFilters = Boolean(q || (subject && subject !== "all") || (grade && grade !== "all"))
+
+  return (
+    <div className="h-full flex-1 flex-col space-y-8 p-8 md:flex">
+      <div className="flex flex-col gap-4 md:flex-row md:items-center md:justify-between">
+        <div>
+          <h2 className="text-2xl font-bold tracking-tight">Textbooks</h2>
+          <p className="text-muted-foreground">Browse your course textbooks.</p>
+        </div>
+        <Button asChild variant="outline">
+          <Link href="/student/dashboard">Back</Link>
+        </Button>
+      </div>
+
+      <TextbookFilters />
+
+      {textbooks.length === 0 ? (
+        <EmptyState
+          icon={BookOpen}
+          title={hasFilters ? "No textbooks match your filters" : "No textbooks yet"}
+          description={hasFilters ? "Try clearing filters or adjusting keywords." : "No textbooks are available right now."}
+          action={hasFilters ? { label: "Clear filters", href: "/student/learning/textbooks" } : undefined}
+          className="bg-card"
+        />
+      ) : (
+        <div className="grid grid-cols-1 gap-6 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4">
+          {textbooks.map((textbook) => (
+            <TextbookCard key={textbook.id} textbook={textbook} hrefBase="/student/learning/textbooks" />
+          ))}
+        </div>
+      )}
+    </div>
+  )
+}
+