feat(student): 完成 student 模块 v4 剩余修复

- P1-4.2: 新增班级详情页 courses/[classId]，展示教师/学校/教室信息与课表

- P2-2.5: 今日课表卡片高亮当前/下一节课（useMemo 实时计算）

- P2-3.9: 作业作答进度网格支持点击跳转题目（scrollIntoView）

- P2-3.10: 作业复习视图显示正确答案（选择/判断/文本题）

- P2-4.4: 课程列表支持按班级名/教师/学校搜索

- P2-5.2: 成绩页新增趋势折线图组件 GradeTrendCard

- P2-9.2/9.3: 诊断报告新增历史记录卡片与弱点练习入口

- P2-10.2: 选课列表支持搜索与选课模式筛选

- P2-11.3: 修复教材阅读页全屏溢出

- P3-1.5: 面包屑保留首个角色段作为根上下文

- P3-7.3: 课表项支持点击跳转至班级详情页（ScheduleList href）

src/app/(dashboard)/student/elective/page.tsx

@@ -2,28 +2,51 @@ import { getAuthContext } from "@/shared/lib/auth-guard"
 
 import { getAvailableCoursesForStudent, getStudentSelections } from "@/modules/elective/data-access-selections"
 import { StudentSelectionView } from "@/modules/elective/components/student-selection-view"
+import { ElectiveFilters } from "@/modules/elective/components/elective-filters"
 
 export const dynamic = "force-dynamic"
 
-export default async function StudentElectivePage() {
+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 StudentElectivePage({
+  searchParams,
+}: {
+  searchParams: Promise<SearchParams>
+}) {
   const ctx = await getAuthContext()
   const studentId = ctx.userId
 
-  const [availableCourses, mySelections] = await Promise.all([
+  const [sp, availableCourses, mySelections] = await Promise.all([
+    searchParams,
     getAvailableCoursesForStudent(studentId),
     getStudentSelections(studentId),
   ])
 
+  const q = (getParam(sp, "q") || "").toLowerCase().trim()
+  const modeFilter = getParam(sp, "mode") || "all"
+
+  const filteredCourses = availableCourses.filter((c) => {
+    if (q && !c.name.toLowerCase().includes(q) && !(c.teacherName?.toLowerCase().includes(q) ?? false)) return false
+    if (modeFilter !== "all" && c.selectionMode !== modeFilter) return false
+    return true
+  })
+
   return (
-    <div className="h-full flex-1 flex-col space-y-8 p-8 md:flex">
+    <div className="space-y-8">
       <div>
         <h2 className="text-2xl font-bold tracking-tight">Elective Courses</h2>
         <p className="text-muted-foreground">
           Browse available electives and manage your selections.
         </p>
       </div>
+      {availableCourses.length > 0 && <ElectiveFilters />}
       <StudentSelectionView
-        availableCourses={availableCourses}
+        availableCourses={filteredCourses}
         mySelections={mySelections}
       />
     </div>

src/app/(dashboard)/student/grades/page.tsx

@@ -1,19 +1,34 @@
 import { getAuthContext } from "@/shared/lib/auth-guard"
 import { getStudentGradeSummary } from "@/modules/grades/data-access"
 import { StudentGradeSummary } from "@/modules/grades/components/student-grade-summary"
+import { GradeFilters } from "@/modules/grades/components/grade-filters"
+import { GradeTrendCard } from "@/modules/grades/components/grade-trend-card"
 import { EmptyState } from "@/shared/components/ui/empty-state"
 import { UserX } from "lucide-react"
 
 export const dynamic = "force-dynamic"
 
-export default async function StudentGradesPage() {
+type SearchParams = { [key: string]: string | string[] | undefined }
-  const ctx = await getAuthContext()
 
-  const summary = await getStudentGradeSummary(ctx.userId)
+const getParam = (params: SearchParams, key: string) => {
+  const v = params[key]
+  return Array.isArray(v) ? v[0] : v
+}
+
+export default async function StudentGradesPage({
+  searchParams,
+}: {
+  searchParams: Promise<SearchParams>
+}) {
+  const ctx = await getAuthContext()
+  const [sp, summary] = await Promise.all([
+    searchParams,
+    getStudentGradeSummary(ctx.userId),
+  ])
 
   if (!summary) {
     return (
-      <div className="h-full flex-1 flex-col space-y-8 p-8 md:flex">
+      <div className="space-y-8">
         <div>
           <h2 className="text-2xl font-bold tracking-tight">My Grades</h2>
           <p className="text-muted-foreground">View your grade records.</p>
@@ -28,13 +43,34 @@ export default async function StudentGradesPage() {
     )
   }
 
+  // 应用筛选
+  const q = (getParam(sp, "q") || "").toLowerCase().trim()
+  const subjectFilter = getParam(sp, "subject") || "all"
+  const typeFilter = getParam(sp, "type") || "all"
+  const semesterFilter = getParam(sp, "semester") || "all"
+
+  const filteredRecords = summary.records.filter((r) => {
+    if (q && !r.title.toLowerCase().includes(q)) return false
+    if (subjectFilter !== "all" && r.subjectName !== subjectFilter) return false
+    if (typeFilter !== "all" && r.type !== typeFilter) return false
+    if (semesterFilter !== "all" && r.semester !== semesterFilter) return false
+    return true
+  })
+
+  const filteredSummary = {
+    ...summary,
+    records: filteredRecords,
+  }
+
   return (
-    <div className="h-full flex-1 flex-col space-y-8 p-8 md:flex">
+    <div className="space-y-8">
       <div>
         <h2 className="text-2xl font-bold tracking-tight">My Grades</h2>
         <p className="text-muted-foreground">View your grade records.</p>
       </div>
-      <StudentGradeSummary summary={summary} />
+      <GradeFilters />
+      {filteredSummary.records.length > 0 && <GradeTrendCard summary={filteredSummary} />}
+      <StudentGradeSummary summary={filteredSummary} />
     </div>
   )
 }

src/app/(dashboard)/student/learning/courses/[classId]/loading.tsx

@@ -0,0 +1,39 @@
+import { Card, CardContent, CardHeader } from "@/shared/components/ui/card"
+import { Skeleton } from "@/shared/components/ui/skeleton"
+
+export default function Loading() {
+  return (
+    <div className="space-y-8">
+      <div className="space-y-2">
+        <Skeleton className="h-4 w-32" />
+        <Skeleton className="h-8 w-64" />
+        <Skeleton className="h-4 w-80" />
+      </div>
+
+      <div className="grid gap-6 md:grid-cols-3">
+        {Array.from({ length: 3 }).map((_, i) => (
+          <Card key={i}>
+            <CardHeader className="pb-3">
+              <Skeleton className="h-4 w-24" />
+            </CardHeader>
+            <CardContent className="space-y-3">
+              <Skeleton className="h-4 w-full" />
+              <Skeleton className="h-4 w-3/4" />
+            </CardContent>
+          </Card>
+        ))}
+      </div>
+
+      <Card>
+        <CardHeader>
+          <Skeleton className="h-5 w-32" />
+        </CardHeader>
+        <CardContent className="space-y-3">
+          {Array.from({ length: 4 }).map((_, i) => (
+            <Skeleton key={i} className="h-14 w-full" />
+          ))}
+        </CardContent>
+      </Card>
+    </div>
+  )
+}

src/app/(dashboard)/student/learning/courses/[classId]/page.tsx

@@ -0,0 +1,234 @@
+import Link from "next/link"
+import { notFound } from "next/navigation"
+import {
+  BookOpen,
+  Building2,
+  CalendarDays,
+  ChevronLeft,
+  Mail,
+  PenTool,
+  School,
+  User,
+} from "lucide-react"
+
+import { getStudentClassById, getStudentSchedule } from "@/modules/classes/data-access"
+import { getCurrentStudentUser } from "@/modules/users/data-access"
+import { Badge } from "@/shared/components/ui/badge"
+import { Button } from "@/shared/components/ui/button"
+import { Card, CardContent, CardHeader, CardTitle } from "@/shared/components/ui/card"
+import { EmptyState } from "@/shared/components/ui/empty-state"
+
+export const dynamic = "force-dynamic"
+
+const WEEKDAYS: Record<number, string> = {
+  1: "Mon",
+  2: "Tue",
+  3: "Wed",
+  4: "Thu",
+  5: "Fri",
+  6: "Sat",
+  7: "Sun",
+}
+
+export default async function StudentClassDetailPage({
+  params,
+}: {
+  params: Promise<{ classId: string }>
+}) {
+  const { classId } = await params
+  const student = await getCurrentStudentUser()
+  if (!student) return notFound()
+
+  const [classInfo, schedule] = await Promise.all([
+    getStudentClassById(student.id, classId),
+    getStudentSchedule(student.id),
+  ])
+
+  if (!classInfo) return notFound()
+
+  // Filter schedule items for this class
+  const classSchedule = schedule
+    .filter((s) => s.classId === classId)
+    .sort((a, b) => a.weekday - b.weekday || a.startTime.localeCompare(b.startTime))
+
+  return (
+    <div className="space-y-8">
+      <div className="flex flex-col gap-4 md:flex-row md:items-start md:justify-between">
+        <div className="space-y-2">
+          <Button asChild variant="ghost" size="sm" className="-ml-2 mb-1">
+            <Link href="/student/learning/courses">
+              <ChevronLeft className="mr-1 h-4 w-4" />
+              Back to Courses
+            </Link>
+          </Button>
+          <h2 className="text-2xl font-bold tracking-tight">{classInfo.name}</h2>
+          <div className="flex flex-wrap items-center gap-2 text-sm text-muted-foreground">
+            <span className="flex items-center gap-1">
+              <BookOpen className="h-4 w-4" />
+              Grade {classInfo.grade}
+            </span>
+            {classInfo.homeroom && (
+              <>
+                <span aria-hidden="true">•</span>
+                <span>{classInfo.homeroom}</span>
+              </>
+            )}
+            {classInfo.room && (
+              <>
+                <span aria-hidden="true">•</span>
+                <span className="flex items-center gap-1">
+                  <Building2 className="h-4 w-4" />
+                  Room {classInfo.room}
+                </span>
+              </>
+            )}
+            <Badge variant="secondary">Active</Badge>
+          </div>
+        </div>
+        <div className="flex gap-2">
+          <Button asChild variant="outline" size="sm">
+            <Link href={`/student/schedule?classId=${encodeURIComponent(classInfo.id)}`}>
+              <CalendarDays className="mr-2 h-4 w-4" />
+              Full Schedule
+            </Link>
+          </Button>
+          <Button asChild size="sm">
+            <Link href="/student/learning/assignments">
+              <PenTool className="mr-2 h-4 w-4" />
+              Assignments
+            </Link>
+          </Button>
+        </div>
+      </div>
+
+      <div className="grid gap-6 md:grid-cols-3">
+        {/* Teacher Info */}
+        <Card>
+          <CardHeader className="pb-3">
+            <CardTitle className="flex items-center gap-2 text-sm font-medium">
+              <User className="h-4 w-4" />
+              Teacher
+            </CardTitle>
+          </CardHeader>
+          <CardContent className="space-y-3 text-sm">
+            {classInfo.teacherName ? (
+              <div className="flex items-center gap-2">
+                <User className="h-4 w-4 text-muted-foreground" />
+                <span className="font-medium">{classInfo.teacherName}</span>
+              </div>
+            ) : (
+              <p className="text-muted-foreground">No teacher assigned.</p>
+            )}
+            {classInfo.teacherEmail && (
+              <div className="flex items-center gap-2">
+                <Mail className="h-4 w-4 text-muted-foreground" />
+                <a
+                  href={`mailto:${classInfo.teacherEmail}`}
+                  className="text-primary hover:underline"
+                >
+                  {classInfo.teacherEmail}
+                </a>
+              </div>
+            )}
+          </CardContent>
+        </Card>
+
+        {/* School Info */}
+        <Card>
+          <CardHeader className="pb-3">
+            <CardTitle className="flex items-center gap-2 text-sm font-medium">
+              <School className="h-4 w-4" />
+              School
+            </CardTitle>
+          </CardHeader>
+          <CardContent className="space-y-3 text-sm">
+            {classInfo.schoolName ? (
+              <div className="flex items-center gap-2">
+                <School className="h-4 w-4 text-muted-foreground" />
+                <span className="font-medium">{classInfo.schoolName}</span>
+              </div>
+            ) : (
+              <p className="text-muted-foreground">School info not available.</p>
+            )}
+            {classInfo.grade && (
+              <div className="flex items-center gap-2">
+                <BookOpen className="h-4 w-4 text-muted-foreground" />
+                <span>Grade {classInfo.grade}</span>
+              </div>
+            )}
+          </CardContent>
+        </Card>
+
+        {/* Class Info */}
+        <Card>
+          <CardHeader className="pb-3">
+            <CardTitle className="flex items-center gap-2 text-sm font-medium">
+              <Building2 className="h-4 w-4" />
+              Classroom
+            </CardTitle>
+          </CardHeader>
+          <CardContent className="space-y-3 text-sm">
+            {classInfo.room ? (
+              <div className="flex items-center gap-2">
+                <Building2 className="h-4 w-4 text-muted-foreground" />
+                <span className="font-medium">Room {classInfo.room}</span>
+              </div>
+            ) : (
+              <p className="text-muted-foreground">Room not assigned.</p>
+            )}
+            {classInfo.homeroom && (
+              <div className="flex items-center gap-2">
+                <User className="h-4 w-4 text-muted-foreground" />
+                <span>Homeroom: {classInfo.homeroom}</span>
+              </div>
+            )}
+          </CardContent>
+        </Card>
+      </div>
+
+      {/* Schedule */}
+      <Card>
+        <CardHeader>
+          <CardTitle className="flex items-center gap-2">
+            <CalendarDays className="h-5 w-5" />
+            Class Schedule
+          </CardTitle>
+        </CardHeader>
+        <CardContent>
+          {classSchedule.length === 0 ? (
+            <EmptyState
+              icon={CalendarDays}
+              title="No schedule"
+              description="No timetable entries found for this class."
+              className="border-none shadow-none"
+            />
+          ) : (
+            <div className="space-y-3">
+              {classSchedule.map((s) => (
+                <div
+                  key={s.id}
+                  className="flex items-center justify-between rounded-md border p-3"
+                >
+                  <div className="flex items-center gap-3">
+                    <Badge variant="outline" className="w-12 justify-center">
+                      {WEEKDAYS[s.weekday]}
+                    </Badge>
+                    <div>
+                      <p className="font-medium">{s.course}</p>
+                      {s.location && (
+                        <p className="text-xs text-muted-foreground">{s.location}</p>
+                      )}
+                    </div>
+                  </div>
+                  <div className="text-sm text-muted-foreground tabular-nums">
+                    {s.startTime} - {s.endTime}
+                  </div>
+                </div>
+              ))}
+            </div>
+          )}
+        </CardContent>
+      </Card>
+    </div>
+  )
+}

src/app/(dashboard)/student/learning/courses/page.tsx

@@ -3,15 +3,27 @@ import { UserX } from "lucide-react"
 import { getStudentClasses } from "@/modules/classes/data-access"
 import { getCurrentStudentUser } from "@/modules/users/data-access"
 import { StudentCoursesView } from "@/modules/student/components/student-courses-view"
+import { CourseFilters } from "@/modules/student/components/course-filters"
 import { EmptyState } from "@/shared/components/ui/empty-state"
 
 export const dynamic = "force-dynamic"
 
-export default async function StudentCoursesPage() {
+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 StudentCoursesPage({
+  searchParams,
+}: {
+  searchParams: Promise<SearchParams>
+}) {
   const student = await getCurrentStudentUser()
   if (!student) {
     return (
-      <div className="h-full flex-1 flex-col space-y-8 p-8 md:flex">
+      <div className="space-y-8">
         <div>
           <h2 className="text-2xl font-bold tracking-tight">Courses</h2>
           <p className="text-muted-foreground">Your enrolled classes.</p>
@@ -25,16 +37,31 @@ export default async function StudentCoursesPage() {
     )
   }
 
-  const classes = await getStudentClasses(student.id)
+  const [sp, classes] = await Promise.all([
+    searchParams,
+    getStudentClasses(student.id),
+  ])
+
+  const q = (getParam(sp, "q") || "").toLowerCase().trim()
+  const filteredClasses = q
+    ? classes.filter((c) => {
+        return (
+          c.name.toLowerCase().includes(q) ||
+          (c.teacherName?.toLowerCase().includes(q) ?? false) ||
+          (c.schoolName?.toLowerCase().includes(q) ?? false) ||
+          (c.homeroom?.toLowerCase().includes(q) ?? false)
+        )
+      })
+    : classes
 
   return (
-    <div className="flex h-full flex-col space-y-8 p-8">
+    <div className="space-y-8">
       <div>
         <h2 className="text-2xl font-bold tracking-tight">Courses</h2>
         <p className="text-muted-foreground">Your enrolled classes.</p>
       </div>
-      <StudentCoursesView classes={classes} />
+      {classes.length > 0 && <CourseFilters />}
+      <StudentCoursesView classes={filteredClasses} />
     </div>
   )
 }
-

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

@@ -2,14 +2,14 @@ import { Skeleton } from "@/shared/components/ui/skeleton"
 
 export default function Loading() {
   return (
-    <div className="flex h-[calc(100vh-4rem)] flex-col overflow-hidden">
+    <div className="flex h-[calc(100vh-4rem-3rem)] flex-col overflow-hidden">
       <div className="flex items-center justify-between border-b py-3 px-6 shrink-0">
         <div className="flex items-center gap-3">
           <Skeleton className="h-6 w-48" />
           <Skeleton className="h-5 w-16 rounded-full" />
         </div>
       </div>
-      <div className="flex-1 p-6">
+      <div className="flex-1">
         <Skeleton className="h-full w-full" />
       </div>
     </div>

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

@@ -29,7 +29,7 @@ export default async function StudentTextbookDetailPage({
   if (!textbook) notFound()
 
   return (
-    <div className="flex h-[calc(100vh-4rem)] flex-col overflow-hidden bg-muted/5">
+    <div className="flex h-[calc(100vh-4rem-3rem)] flex-col overflow-hidden bg-muted/5">
       <div className="flex items-center justify-between border-b bg-background/95 backdrop-blur supports-[backdrop-filter]:bg-background/60 py-3 px-6 shrink-0 z-10">
         <div className="flex items-center gap-3 min-w-0">
           <h1 className="text-lg font-bold tracking-tight truncate">{textbook.title}</h1>
@@ -43,7 +43,7 @@ export default async function StudentTextbookDetailPage({
         </div>
       </div>
 
-      <div className="flex-1 overflow-hidden p-6">
+      <div className="flex-1 overflow-hidden">
         {chapters.length === 0 ? (
           <div className="h-full flex items-center justify-center rounded-lg border border-dashed bg-card">
             <EmptyState

src/modules/classes/data-access-students.ts

@@ -192,6 +192,48 @@ export const getStudentClasses = cache(async (studentId: string): Promise<Studen
   return list
 })
 
+/**
+ * Get a single class details for a student (verifies enrollment).
+ * Returns null if the student is not enrolled in the class.
+ */
+export const getStudentClassById = cache(
+  async (studentId: string, classId: string): Promise<StudentEnrolledClass | null> => {
+    const sid = studentId.trim()
+    const cid = classId.trim()
+    if (!sid || !cid) return null
+
+    const rows = await db
+      .select({
+        id: classes.id,
+        schoolName: classes.schoolName,
+        name: classes.name,
+        grade: classes.grade,
+        homeroom: classes.homeroom,
+        room: classes.room,
+        teacherName: users.name,
+        teacherEmail: users.email,
+      })
+      .from(classEnrollments)
+      .innerJoin(classes, eq(classes.id, classEnrollments.classId))
+      .leftJoin(users, eq(users.id, classes.teacherId))
+      .where(and(eq(classEnrollments.studentId, sid), eq(classEnrollments.classId, cid), eq(classEnrollments.status, "active")))
+      .limit(1)
+
+    if (rows.length === 0) return null
+    const r = rows[0]
+    return {
+      id: r.id,
+      schoolName: r.schoolName,
+      name: r.name,
+      grade: r.grade,
+      homeroom: r.homeroom,
+      room: r.room,
+      teacherName: r.teacherName,
+      teacherEmail: r.teacherEmail,
+    }
+  }
+)
+
 export const getClassStudents = cache(
   async (params?: { classId?: string; q?: string; status?: string; teacherId?: string }): Promise<ClassStudent[]> => {
     const teacherId = params?.teacherId ?? (await getSessionTeacherId())

src/modules/diagnostic/components/student-diagnostic-view.tsx

@@ -1,20 +1,14 @@
 "use client"
 
-import { useState } from "react"
+import Link from "next/link"
-import { useRouter } from "next/navigation"
+import { Award, AlertTriangle, Lightbulb, FileText, History, ArrowRight } from "lucide-react"
-import { toast } from "sonner"
-import { Award, AlertTriangle, Lightbulb, FileText, TrendingUp } from "lucide-react"
 
 import { Card, CardContent, CardHeader, CardTitle, CardDescription } from "@/shared/components/ui/card"
 import { Badge } from "@/shared/components/ui/badge"
 import { Button } from "@/shared/components/ui/button"
-import { Input } from "@/shared/components/ui/input"
-import { Label } from "@/shared/components/ui/label"
 import { EmptyState } from "@/shared/components/ui/empty-state"
-import { usePermission } from "@/shared/hooks"
+import { formatDate } from "@/shared/lib/utils"
-import { Permissions } from "@/shared/types/permissions"
 import { MasteryRadarChart } from "./mastery-radar-chart"
-import { generateStudentReportAction } from "../actions"
 import type { DiagnosticReportWithDetails, MasteryRadarPoint, StudentMasterySummary } from "../types"
 
 interface StudentDiagnosticViewProps {
@@ -24,28 +18,6 @@ interface StudentDiagnosticViewProps {
 }
 
 export function StudentDiagnosticView({ summary, reports, classAverageMastery }: StudentDiagnosticViewProps) {
-  const router = useRouter()
-  const { hasPermission } = usePermission()
-  const canManage = hasPermission(Permissions.DIAGNOSTIC_MANAGE)
-  const [period, setPeriod] = useState(new Date().toISOString().slice(0, 7))
-  const [isGenerating, setIsGenerating] = useState(false)
-
-  const handleGenerate = async () => {
-    if (!summary) return
-    setIsGenerating(true)
-    const formData = new FormData()
-    formData.set("studentId", summary.studentId)
-    formData.set("period", period)
-    const result = await generateStudentReportAction(null, formData)
-    setIsGenerating(false)
-    if (result.success) {
-      toast.success(result.message)
-      router.refresh()
-    } else {
-      toast.error(result.message || "Failed to generate report")
-    }
-  }
-
   if (!summary) {
     return (
       <EmptyState
@@ -149,9 +121,17 @@ export function StudentDiagnosticView({ summary, reports, classAverageMastery }:
             ) : (
               <ul className="space-y-2">
                 {summary.weaknesses.map((m) => (
-                  <li key={m.knowledgePointId} className="flex items-center justify-between">
+                  <li key={m.knowledgePointId} className="flex items-center justify-between gap-2">
-                    <span className="text-sm">{m.knowledgePointName}</span>
+                    <div className="flex items-center gap-2 min-w-0">
-                    <Badge variant="destructive">{m.masteryLevel.toFixed(1)}%</Badge>
+                      <span className="text-sm truncate">{m.knowledgePointName}</span>
+                      <Badge variant="destructive" className="shrink-0">{m.masteryLevel.toFixed(1)}%</Badge>
+                    </div>
+                    <Button asChild variant="ghost" size="sm" className="h-7 shrink-0 text-xs">
+                      <Link href="/student/learning/assignments">
+                        Practice
+                        <ArrowRight className="ml-1 h-3 w-3" />
+                      </Link>
+                    </Button>
                   </li>
                 ))}
               </ul>
@@ -160,38 +140,6 @@ export function StudentDiagnosticView({ summary, reports, classAverageMastery }:
         </Card>
       </div>
 
-      {/* 生成报告 */}
-      {canManage ? (
-        <Card>
-          <CardHeader>
-            <CardTitle className="flex items-center gap-2">
-              <TrendingUp className="h-4 w-4" />
-              Generate Diagnostic Report
-            </CardTitle>
-            <CardDescription>
-              Generate an AI-analyzed diagnostic report for this student.
-            </CardDescription>
-          </CardHeader>
-          <CardContent>
-            <div className="flex items-end gap-3">
-              <div className="grid gap-2">
-                <Label htmlFor="period" className="text-xs">Period (YYYY-MM)</Label>
-                <Input
-                  id="period"
-                  type="month"
-                  value={period}
-                  onChange={(e) => setPeriod(e.target.value)}
-                  className="w-[180px]"
-                />
-              </div>
-              <Button onClick={handleGenerate} disabled={isGenerating}>
-                {isGenerating ? "Generating..." : "Generate Report"}
-              </Button>
-            </div>
-          </CardContent>
-        </Card>
-      ) : null}
-
       {/* 最新报告 / 建议 */}
       {latestReport ? (
         <Card>
@@ -224,6 +172,44 @@ export function StudentDiagnosticView({ summary, reports, classAverageMastery }:
           </CardContent>
         </Card>
       ) : null}
+
+      {/* 历史报告列表 */}
+      {publishedReports.length > 1 ? (
+        <Card>
+          <CardHeader>
+            <CardTitle className="flex items-center gap-2">
+              <History className="h-4 w-4" />
+              Report History
+            </CardTitle>
+            <CardDescription>Past diagnostic reports (newest first).</CardDescription>
+          </CardHeader>
+          <CardContent>
+            <div className="space-y-2">
+              {publishedReports.map((r) => (
+                <div
+                  key={r.id}
+                  className="flex items-center justify-between gap-3 rounded-md border p-3"
+                >
+                  <div className="min-w-0 space-y-1">
+                    <div className="flex items-center gap-2">
+                      <span className="text-sm font-medium">
+                        {r.period ?? "Untitled period"}
+                      </span>
+                      <Badge variant="outline" className="text-[10px]">
+                        {r.reportType}
+                      </Badge>
+                    </div>
+                    <p className="text-xs text-muted-foreground">
+                      {formatDate(r.createdAt)}
+                      {r.overallScore !== null ? ` · Overall: ${r.overallScore.toFixed(1)}%` : ""}
+                    </p>
+                  </div>
+                </div>
+              ))}
+            </div>
+          </CardContent>
+        </Card>
+      ) : null}
     </div>
   )
 }

src/modules/elective/components/elective-filters.tsx

@@ -0,0 +1,49 @@
+"use client"
+
+import { useQueryState, parseAsString } from "nuqs"
+
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from "@/shared/components/ui/select"
+import { FilterBar, FilterSearchInput } from "@/shared/components/ui/filter-bar"
+
+export function ElectiveFilters() {
+  const [search, setSearch] = useQueryState("q", parseAsString.withDefault(""))
+  const [mode, setMode] = useQueryState("mode", parseAsString.withDefault("all"))
+
+  const hasFilters = Boolean(search || mode !== "all")
+
+  return (
+    <FilterBar
+      layout="between"
+      hasFilters={hasFilters}
+      onReset={() => {
+        setSearch(null)
+        setMode(null)
+      }}
+    >
+      <FilterSearchInput
+        value={search}
+        onChange={(v) => setSearch(v || null)}
+        placeholder="Search by course name, teacher..."
+      />
+
+      <div className="flex flex-wrap gap-2 w-full md:w-auto">
+        <Select value={mode} onValueChange={(val) => setMode(val === "all" ? null : val)}>
+          <SelectTrigger className="w-[160px] bg-background border-muted-foreground/20">
+            <SelectValue placeholder="Selection Mode" />
+          </SelectTrigger>
+          <SelectContent>
+            <SelectItem value="all">All Modes</SelectItem>
+            <SelectItem value="fcfs">First Come First Served</SelectItem>
+            <SelectItem value="lottery">Lottery</SelectItem>
+          </SelectContent>
+        </Select>
+      </div>
+    </FilterBar>
+  )
+}

src/modules/grades/components/grade-trend-card.tsx

@@ -0,0 +1,57 @@
+"use client"
+
+import { useMemo } from "react"
+import { BarChart3 } from "lucide-react"
+
+import { ChartCardShell } from "@/shared/components/charts/chart-card-shell"
+import { TrendLineChart } from "@/shared/components/charts/trend-line-chart"
+import { formatDate } from "@/shared/lib/utils"
+import type { StudentGradeSummary } from "../types"
+
+export function GradeTrendCard({ summary }: { summary: StudentGradeSummary }) {
+  const chartData = useMemo(() => {
+    return [...summary.records]
+      .sort((a, b) => new Date(a.createdAt).getTime() - new Date(b.createdAt).getTime())
+      .map((r) => ({
+        title: r.title,
+        score: Math.round((r.score / r.fullScore) * 100),
+        fullTitle: r.title,
+        submittedAt: formatDate(r.createdAt),
+        rawScore: r.score,
+        maxScore: r.fullScore,
+      }))
+  }, [summary.records])
+
+  const hasData = chartData.length > 0
+
+  return (
+    <ChartCardShell
+      title="Grade Trend"
+      icon={BarChart3}
+      iconClassName="text-muted-foreground"
+      isEmpty={!hasData}
+      emptyTitle="No grade records yet"
+      emptyDescription="Your grade trend will appear here once records are added."
+      emptyClassName="h-64"
+    >
+      <div className="rounded-md border bg-card p-4">
+        <TrendLineChart
+          data={chartData}
+          series={[
+            {
+              dataKey: "score",
+              name: "Score (%)",
+              color: "hsl(var(--primary))",
+              dotRadius: 4,
+              activeDotRadius: 6,
+            },
+          ]}
+          heightClassName="h-[240px]"
+          margin={{ left: 12, right: 12, top: 12, bottom: 12 }}
+          yWidth={30}
+          tooltipClassName="w-[200px]"
+        />
+      </div>
+    </ChartCardShell>
+  )
+}

src/modules/homework/components/homework-take-view.tsx

@@ -1,7 +1,8 @@
 "use client"
 
-import { useMemo, useState } from "react"
+import { useEffect, useMemo, useState } from "react"
 import { useRouter } from "next/navigation"
+import Link from "next/link"
 import { toast } from "sonner"
 import { RadioGroup, RadioGroupItem } from "@/shared/components/ui/radio-group"
 
@@ -12,7 +13,18 @@ import { Checkbox } from "@/shared/components/ui/checkbox"
 import { Label } from "@/shared/components/ui/label"
 import { Textarea } from "@/shared/components/ui/textarea"
 import { ScrollArea } from "@/shared/components/ui/scroll-area"
-import { Clock, CheckCircle2, Save, FileText } from "lucide-react"
+import {
+  AlertDialog,
+  AlertDialogAction,
+  AlertDialogCancel,
+  AlertDialogContent,
+  AlertDialogDescription,
+  AlertDialogFooter,
+  AlertDialogHeader,
+  AlertDialogTitle,
+} from "@/shared/components/ui/alert-dialog"
+import { Clock, CheckCircle2, Save, FileText, ChevronLeft, TriangleAlert } from "lucide-react"
+import { formatDate, cn } from "@/shared/lib/utils"
 
 import type { StudentHomeworkTakeData } from "../types"
 import { saveHomeworkAnswerAction, startHomeworkSubmissionAction, submitHomeworkAction } from "../actions"
@@ -64,6 +76,7 @@ export function HomeworkTakeView({ assignmentId, initialData }: HomeworkTakeView
   const [submissionId, setSubmissionId] = useState<string | null>(initialData.submission?.id ?? null)
   const [submissionStatus, setSubmissionStatus] = useState<string>(initialData.submission?.status ?? "not_started")
   const [isBusy, setIsBusy] = useState(false)
+  const [showSubmitConfirm, setShowSubmitConfirm] = useState(false)
 
   const initialAnswersByQuestionId = useMemo(() => {
     const map = new Map<string, { answer: unknown }>()
@@ -83,6 +96,30 @@ export function HomeworkTakeView({ assignmentId, initialData }: HomeworkTakeView
   const canEdit = isStarted && Boolean(submissionId)
   const showQuestions = submissionStatus !== "not_started"
 
+  // 离开警告：作答中未提交时关闭/刷新页面会丢失答案
+  useEffect(() => {
+    if (!canEdit) return
+    const handler = (e: BeforeUnloadEvent) => {
+      e.preventDefault()
+      e.returnValue = ""
+    }
+    window.addEventListener("beforeunload", handler)
+    return () => window.removeEventListener("beforeunload", handler)
+  }, [canEdit])
+
+  // 截止时间与紧急度
+  const dueAt = initialData.assignment.dueAt
+  const now = new Date()
+  const dueDate = dueAt ? new Date(dueAt) : null
+  const isOverdue = dueDate ? dueDate < now : false
+  const hoursUntilDue = dueDate ? Math.floor((dueDate.getTime() - now.getTime()) / (1000 * 60 * 60)) : null
+  const isUrgent = hoursUntilDue !== null && hoursUntilDue >= 0 && hoursUntilDue < 24
+
+  // 尝试次数
+  const maxAttempts = initialData.assignment.maxAttempts
+  const attemptsUsed = initialData.submission?.attemptNo ?? 0
+  const attemptsRemaining = Math.max(0, maxAttempts - attemptsUsed)
+
   const handleStart = async () => {
     setIsBusy(true)
     const fd = new FormData()
@@ -144,11 +181,26 @@ export function HomeworkTakeView({ assignmentId, initialData }: HomeworkTakeView
     setIsBusy(false)
   }
 
+  // 统计未作答题目数
+  const unansweredCount = initialData.questions.filter((q) => {
+    const v = answersByQuestionId[q.questionId]?.answer
+    if (v === undefined || v === null) return true
+    if (typeof v === "string" && v.trim() === "") return true
+    if (Array.isArray(v) && v.length === 0) return true
+    return false
+  }).length
+
   return (
     <div className="grid h-[calc(100vh-10rem)] grid-cols-1 gap-6 lg:grid-cols-12">
       <div className="lg:col-span-9 flex flex-col h-full overflow-hidden rounded-md border bg-card">
         <div className="border-b p-4 flex items-center justify-between bg-muted/30">
           <div className="flex items-center gap-3">
+            <Button asChild variant="ghost" size="sm" className="mr-1">
+              <Link href="/student/learning/assignments">
+                <ChevronLeft className="mr-1 h-4 w-4" />
+                Back
+              </Link>
+            </Button>
             <div className="flex h-8 w-8 items-center justify-center rounded-full bg-primary/10">
               <FileText className="h-4 w-4 text-primary" />
             </div>
@@ -169,15 +221,10 @@ export function HomeworkTakeView({ assignmentId, initialData }: HomeworkTakeView
               {isBusy ? "Starting..." : "Start Assignment"}
             </Button>
           ) : (
-            <div className="flex items-center gap-2">
+            <Button onClick={() => setShowSubmitConfirm(true)} disabled={isBusy} size="sm">
-              <span className="text-xs text-muted-foreground hidden sm:inline-block">
-                Auto-saving enabled
-              </span>
-              <Button onClick={handleSubmit} disabled={isBusy} size="sm">
               <CheckCircle2 className="mr-2 h-4 w-4" />
               {isBusy ? "Submitting..." : "Submit Assignment"}
             </Button>
-            </div>
           )}
         </div>
 
@@ -190,7 +237,7 @@ export function HomeworkTakeView({ assignmentId, initialData }: HomeworkTakeView
                 </div>
                 <h3 className="text-lg font-medium">Ready to start?</h3>
                 <p className="text-muted-foreground max-w-sm mt-2 mb-6">
-                  Click the &quot;Start Assignment&quot; button above to begin. The timer will start once you confirm.
+                  Click the &quot;Start Assignment&quot; button above to begin. Your answers will be saved when you click &quot;Save Answer&quot;.
                 </p>
                 <Button onClick={handleStart} disabled={isBusy}>
                   Start Now
@@ -204,7 +251,7 @@ export function HomeworkTakeView({ assignmentId, initialData }: HomeworkTakeView
               const value = answersByQuestionId[q.questionId]?.answer
 
               return (
-                <Card key={q.questionId} className="border-l-4 border-l-primary shadow-sm">
+                <Card key={q.questionId} id={`question-${q.questionId}`} className="border-l-4 border-l-primary shadow-sm scroll-mt-4">
                   <CardHeader className="pb-2">
                     <div className="flex items-start justify-between gap-4">
                       <div className="space-y-1">
@@ -370,6 +417,40 @@ export function HomeworkTakeView({ assignmentId, initialData }: HomeworkTakeView
               </div>
             </div>
 
+            {dueAt && (
+              <div>
+                <Label className="text-xs text-muted-foreground uppercase tracking-wider">Due Date</Label>
+                <div className={cn(
+                  "mt-1 flex items-center gap-2 text-sm font-medium",
+                  isOverdue ? "text-destructive" : isUrgent ? "text-orange-500" : "text-foreground"
+                )}>
+                  {(isOverdue || isUrgent) && <TriangleAlert className="h-4 w-4" />}
+                  <span>{formatDate(dueAt)}</span>
+                </div>
+                {isOverdue && (
+                  <p className="mt-1 text-xs text-destructive">Overdue</p>
+                )}
+                {isUrgent && !isOverdue && hoursUntilDue !== null && (
+                  <p className="mt-1 text-xs text-orange-500">
+                    {hoursUntilDue === 0 ? "Less than 1 hour left" : `${hoursUntilDue} hour${hoursUntilDue === 1 ? "" : "s"} left`}
+                  </p>
+                )}
+              </div>
+            )}
+
+            {maxAttempts > 0 && (
+              <div>
+                <Label className="text-xs text-muted-foreground uppercase tracking-wider">Attempts</Label>
+                <div className="mt-1 text-sm">
+                  <span className="font-medium">{attemptsUsed}</span>
+                  <span className="text-muted-foreground"> / {maxAttempts} used</span>
+                  {attemptsRemaining > 0 && (
+                    <span className="text-muted-foreground"> · {attemptsRemaining} remaining</span>
+                  )}
+                </div>
+              </div>
+            )}
+            
             <div>
               <Label className="text-xs text-muted-foreground uppercase tracking-wider">Description</Label>
               <p className="mt-1 text-sm text-muted-foreground leading-relaxed">
@@ -387,15 +468,21 @@ export function HomeworkTakeView({ assignmentId, initialData }: HomeworkTakeView
                                     (Array.isArray(answersByQuestionId[q.questionId]?.answer) ? (answersByQuestionId[q.questionId]?.answer as unknown[]).length > 0 : true)
                     
                     return (
-                      <div 
+                      <button
                         key={q.questionId}
-                        className={`
+                        type="button"
-                          h-8 w-8 rounded flex items-center justify-center text-xs font-medium border
+                        onClick={() => {
-                          ${hasAnswer ? "bg-primary text-primary-foreground border-primary" : "bg-background text-muted-foreground border-input"}
+                          const el = document.getElementById(`question-${q.questionId}`)
-                        `}
+                          if (el) el.scrollIntoView({ behavior: "smooth", block: "start" })
+                        }}
+                        className={cn(
+                          "h-8 w-8 rounded flex items-center justify-center text-xs font-medium border transition-colors hover:opacity-80 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-1",
+                          hasAnswer ? "bg-primary text-primary-foreground border-primary" : "bg-background text-muted-foreground border-input"
+                        )}
+                        aria-label={`Jump to question ${i + 1}`}
                       >
                         {i + 1}
-                      </div>
+                      </button>
                     )
                   })}
                 </div>
@@ -406,7 +493,7 @@ export function HomeworkTakeView({ assignmentId, initialData }: HomeworkTakeView
         
         {canEdit && (
           <div className="border-t p-4 bg-muted/20">
-            <Button className="w-full" onClick={handleSubmit} disabled={isBusy}>
+            <Button className="w-full" onClick={() => setShowSubmitConfirm(true)} disabled={isBusy}>
               {isBusy ? "Submitting..." : "Submit All"}
             </Button>
             <p className="mt-2 text-xs text-center text-muted-foreground">
@@ -415,6 +502,33 @@ export function HomeworkTakeView({ assignmentId, initialData }: HomeworkTakeView
           </div>
         )}
       </div>
+
+      {/* 提交二次确认对话框 */}
+      <AlertDialog open={showSubmitConfirm} onOpenChange={setShowSubmitConfirm}>
+        <AlertDialogContent>
+          <AlertDialogHeader>
+            <AlertDialogTitle>Confirm Submission</AlertDialogTitle>
+            <AlertDialogDescription>
+              {unansweredCount > 0
+                ? `You have ${unansweredCount} unanswered question${unansweredCount === 1 ? "" : "s"}. Submitted answers cannot be changed. Are you sure you want to submit?`
+                : "All questions have been answered. Submitted answers cannot be changed. Are you sure you want to submit?"}
+            </AlertDialogDescription>
+          </AlertDialogHeader>
+          <AlertDialogFooter>
+            <AlertDialogCancel disabled={isBusy}>Cancel</AlertDialogCancel>
+            <AlertDialogAction
+              disabled={isBusy}
+              onClick={(e) => {
+                e.preventDefault()
+                setShowSubmitConfirm(false)
+                void handleSubmit()
+              }}
+            >
+              {isBusy ? "Submitting..." : "Confirm Submit"}
+            </AlertDialogAction>
+          </AlertDialogFooter>
+        </AlertDialogContent>
+      </AlertDialog>
     </div>
   )
 }

src/modules/homework/components/student-homework-review-view.tsx

@@ -15,7 +15,7 @@ import { RadioGroup, RadioGroupItem } from "@/shared/components/ui/radio-group"
 
 const isRecord = (v: unknown): v is Record<string, unknown> => typeof v === "object" && v !== null
 
-type Option = { id: string; text: string }
+type Option = { id: string; text: string; isCorrect?: boolean }
 
 const getQuestionText = (content: unknown): string => {
   if (!isRecord(content)) return ""
@@ -32,11 +32,29 @@ const getOptions = (content: unknown): Option[] => {
     const id = typeof item.id === "string" ? item.id : ""
     const text = typeof item.text === "string" ? item.text : ""
     if (!id || !text) continue
-    out.push({ id, text })
+    const isCorrect = item.isCorrect === true
+    out.push({ id, text, isCorrect })
   }
   return out
 }
 
+const getChoiceCorrectIds = (content: unknown): string[] => {
+  return getOptions(content).filter((o) => o.isCorrect).map((o) => o.id)
+}
+
+const getJudgmentCorrectAnswer = (content: unknown): boolean | null => {
+  if (!isRecord(content)) return null
+  return typeof content.correctAnswer === "boolean" ? content.correctAnswer : null
+}
+
+const getTextCorrectAnswers = (content: unknown): string[] => {
+  if (!isRecord(content)) return []
+  const raw = content.correctAnswer
+  if (typeof raw === "string") return [raw]
+  if (Array.isArray(raw)) return raw.filter((x): x is string => typeof x === "string")
+  return []
+}
+
 const toAnswerShape = (questionType: string, v: unknown) => {
   if (questionType === "text") return { answer: typeof v === "string" ? v : "" }
   if (questionType === "judgment") return { answer: typeof v === "boolean" ? v : false }
@@ -144,6 +162,16 @@ export function HomeworkReviewView({ initialData }: HomeworkReviewViewProps) {
                         <div className="rounded-md border p-3 bg-muted/20 text-sm min-h-[60px]">
                           {typeof value === "string" ? value : <span className="text-muted-foreground italic">No answer provided</span>}
                         </div>
+                        {isGraded && (() => {
+                          const correctTexts = getTextCorrectAnswers(q.questionContent)
+                          if (correctTexts.length === 0) return null
+                          return (
+                            <div className="rounded-md border border-emerald-200 bg-emerald-50 p-3 text-sm">
+                              <div className="font-medium text-emerald-700 mb-1">Correct Answer</div>
+                              <div className="text-emerald-900">{correctTexts.join(" / ")}</div>
+                            </div>
+                          )
+                        })()}
                       </div>
                     ) : q.questionType === "judgment" ? (
                       <div className="grid gap-2">
@@ -161,6 +189,16 @@ export function HomeworkReviewView({ initialData }: HomeworkReviewViewProps) {
                             <Label htmlFor={`${q.questionId}-false`} className="flex-1 font-normal">False</Label>
                           </div>
                         </RadioGroup>
+                        {isGraded && (() => {
+                          const correct = getJudgmentCorrectAnswer(q.questionContent)
+                          if (correct === null) return null
+                          return (
+                            <div className="rounded-md border border-emerald-200 bg-emerald-50 p-3 text-sm">
+                              <span className="font-medium text-emerald-700">Correct Answer: </span>
+                              <span className="text-emerald-900">{correct ? "True" : "False"}</span>
+                            </div>
+                          )
+                        })()}
                       </div>
                     ) : q.questionType === "single_choice" ? (
                       <div className="grid gap-2">
@@ -169,14 +207,26 @@ export function HomeworkReviewView({ initialData }: HomeworkReviewViewProps) {
                           disabled
                           className="flex flex-col gap-2"
                         >
-                          {options.map((o) => (
+                          {options.map((o) => {
-                            <div key={o.id} className="flex items-center space-x-2 rounded-md border p-3 bg-muted/20">
+                            const correctIds = isGraded ? getChoiceCorrectIds(q.questionContent) : []
+                            const isCorrectOption = isGraded && correctIds.includes(o.id)
+                            return (
+                              <div
+                                key={o.id}
+                                className={`flex items-center space-x-2 rounded-md border p-3 bg-muted/20 ${
+                                  isCorrectOption ? "border-emerald-300 bg-emerald-50" : ""
+                                }`}
+                              >
                                 <RadioGroupItem value={o.id} id={`${q.questionId}-${o.id}`} />
                                 <Label htmlFor={`${q.questionId}-${o.id}`} className="flex-1 font-normal">
                                   {o.text}
+                                  {isCorrectOption && (
+                                    <span className="ml-2 text-xs font-medium text-emerald-700">✓ Correct</span>
+                                  )}
                                 </Label>
                               </div>
-                          ))}
+                            )
+                          })}
                         </RadioGroup>
                       </div>
                     ) : q.questionType === "multiple_choice" ? (
@@ -184,8 +234,15 @@ export function HomeworkReviewView({ initialData }: HomeworkReviewViewProps) {
                         <div className="flex flex-col gap-2">
                           {options.map((o) => {
                             const selected = Array.isArray(value) ? value.includes(o.id) : false
+                            const correctIds = isGraded ? getChoiceCorrectIds(q.questionContent) : []
+                            const isCorrectOption = isGraded && correctIds.includes(o.id)
                             return (
-                              <div key={o.id} className="flex items-start space-x-2 rounded-md border p-3 bg-muted/20">
+                              <div
+                                key={o.id}
+                                className={`flex items-start space-x-2 rounded-md border p-3 bg-muted/20 ${
+                                  isCorrectOption ? "border-emerald-300 bg-emerald-50" : ""
+                                }`}
+                              >
                                 <Checkbox
                                   id={`${q.questionId}-${o.id}`}
                                   checked={selected}
@@ -193,6 +250,9 @@ export function HomeworkReviewView({ initialData }: HomeworkReviewViewProps) {
                                 />
                                 <Label htmlFor={`${q.questionId}-${o.id}`} className="flex-1 font-normal leading-normal">
                                   {o.text}
+                                  {isCorrectOption && (
+                                    <span className="ml-2 text-xs font-medium text-emerald-700">✓ Correct</span>
+                                  )}
                                 </Label>
                               </div>
                             )

src/modules/layout/components/site-header.tsx

@@ -61,13 +61,20 @@ export function SiteHeader() {
 
   // Generate breadcrumbs
   const segments = pathname.split("/").filter(Boolean)
+  const roleSegments = new Set(["admin", "teacher", "student", "parent"])
   const breadcrumbs = segments
     .map((segment, index) => {
       const href = `/${segments.slice(0, index + 1).join("/")}`
       const title = BREADCRUMB_MAP.get(href) || segment.charAt(0).toUpperCase() + segment.slice(1)
-      return { href, title, isLast: index === segments.length - 1 }
+      return { href, title, isLast: index === segments.length - 1, isRole: roleSegments.has(segment.toLowerCase()) }
+    })
+    .filter((b, idx) => {
+      // Keep the first role segment (root context), filter out subsequent role segments
+      if (b.isRole) {
+        return idx === 0
+      }
+      return true
     })
-    .filter((b) => !["admin", "teacher", "student", "parent"].includes(b.title.toLowerCase()))
 
   return (
     <header className="bg-background/95 supports-[backdrop-filter]:bg-background/60 sticky top-0 z-50 flex h-16 items-center border-b px-4 backdrop-blur-sm">

src/modules/student/components/course-filters.tsx

@@ -0,0 +1,25 @@
+"use client"
+
+import { useQueryState, parseAsString } from "nuqs"
+
+import { FilterBar, FilterSearchInput } from "@/shared/components/ui/filter-bar"
+
+export function CourseFilters() {
+  const [search, setSearch] = useQueryState("q", parseAsString.withDefault(""))
+
+  const hasFilters = Boolean(search)
+
+  return (
+    <FilterBar
+      layout="between"
+      hasFilters={hasFilters}
+      onReset={() => setSearch(null)}
+    >
+      <FilterSearchInput
+        value={search}
+        onChange={(v) => setSearch(v || null)}
+        placeholder="Search by class name, teacher, school..."
+      />
+    </FilterBar>
+  )
+}

src/modules/student/components/student-courses-view.tsx

@@ -11,7 +11,7 @@ import { Button } from "@/shared/components/ui/button"
 import { EmptyState } from "@/shared/components/ui/empty-state"
 import { Input } from "@/shared/components/ui/input"
 import { Label } from "@/shared/components/ui/label"
-import { BookOpen, Building2, Inbox, CalendarDays, User, PlusCircle, PenTool } from "lucide-react"
+import { BookOpen, Building2, Inbox, CalendarDays, User, PlusCircle, PenTool, Mail, School } from "lucide-react"
 
 import type { StudentEnrolledClass } from "@/modules/classes/types"
 import { joinClassByInvitationCodeAction } from "@/modules/classes/actions"
@@ -22,7 +22,11 @@ const ClassCard = memo(function ClassCard({ c }: { c: StudentEnrolledClass }) {
       <CardHeader className="bg-muted/30 pb-4">
         <div className="flex items-start justify-between gap-4">
           <div className="space-y-1">
-            <CardTitle className="line-clamp-1 text-lg">{c.name}</CardTitle>
+            <CardTitle className="line-clamp-1 text-lg">
+              <Link href={`/student/learning/courses/${encodeURIComponent(c.id)}`} className="hover:underline">
+                {c.name}
+              </Link>
+            </CardTitle>
             <CardDescription className="flex items-center gap-2 text-xs">
               <span className="flex items-center gap-1">
                 <BookOpen className="h-3 w-3" />
@@ -44,12 +48,26 @@ const ClassCard = memo(function ClassCard({ c }: { c: StudentEnrolledClass }) {
 
       <CardContent className="flex-1 space-y-4 py-4">
         <div className="space-y-2 text-sm">
+          {c.schoolName && (
+            <div className="flex items-center gap-2 text-muted-foreground">
+              <School className="h-4 w-4" />
+              <span>{c.schoolName}</span>
+            </div>
+          )}
           {c.teacherName && (
             <div className="flex items-center gap-2 text-muted-foreground">
               <User className="h-4 w-4" />
               <span>{c.teacherName}</span>
             </div>
           )}
+          {c.teacherEmail && (
+            <div className="flex items-center gap-2 text-muted-foreground">
+              <Mail className="h-4 w-4" />
+              <a href={`mailto:${c.teacherEmail}`} className="hover:underline hover:text-foreground">
+                {c.teacherEmail}
+              </a>
+            </div>
+          )}
           {c.room && (
             <div className="flex items-center gap-2 text-muted-foreground">
               <Building2 className="h-4 w-4" />
@@ -60,6 +78,12 @@ const ClassCard = memo(function ClassCard({ c }: { c: StudentEnrolledClass }) {
       </CardContent>
 
       <CardFooter className="flex gap-2 border-t bg-muted/10 p-4">
+        <Button asChild variant="outline" size="sm" className="flex-1">
+          <Link href={`/student/learning/courses/${encodeURIComponent(c.id)}`}>
+            <BookOpen className="mr-2 h-4 w-4" />
+            Details
+          </Link>
+        </Button>
         <Button asChild variant="outline" size="sm" className="flex-1">
           <Link href={`/student/schedule?classId=${encodeURIComponent(c.id)}`}>
             <CalendarDays className="mr-2 h-4 w-4" />
@@ -118,13 +142,15 @@ export function StudentCoursesView({
         <EmptyState
           icon={Inbox}
           title="No courses yet"
-          description="You are not enrolled in any classes. Join a class to get started."
+          description="You are not enrolled in any classes. Join a class below to get started."
           className="py-12"
         />
       )}
 
-      <div className="rounded-lg border bg-card p-6 shadow-sm">
+      {/* 加入班级表单：无课程时置顶，有课程时置底 */}
-        <div className="mb-6 flex items-center gap-3">
+      <div className={classes.length === 0 ? "" : "rounded-lg border bg-card p-6 shadow-sm"}>
+        <div className={classes.length === 0 ? "rounded-lg border bg-card p-6 shadow-sm" : "mb-6 flex items-center gap-3"}>
+          <div className={classes.length === 0 ? "mb-6 flex items-center gap-3" : ""}>
             <div className="flex h-10 w-10 items-center justify-center rounded-full bg-primary/10">
               <PlusCircle className="h-5 w-5 text-primary" />
             </div>
@@ -135,6 +161,7 @@ export function StudentCoursesView({
               </p>
             </div>
           </div>
+        </div>
 
         <form action={handleJoin} className="flex flex-col gap-4 sm:flex-row sm:items-end">
           <div className="flex-1 space-y-2">

src/modules/student/components/student-schedule-view.tsx

@@ -2,6 +2,7 @@ import { Card, CardContent, CardHeader, CardTitle } from "@/shared/components/ui
 import { EmptyState } from "@/shared/components/ui/empty-state"
 import { CalendarX } from "lucide-react"
 import { ScheduleList } from "@/shared/components/schedule/schedule-list"
+import { cn } from "@/shared/lib/utils"
 
 import type { StudentScheduleItem } from "@/modules/classes/types"
 
@@ -15,6 +16,16 @@ const WEEKDAYS: Array<{ key: 1 | 2 | 3 | 4 | 5 | 6 | 7; label: string }> = [
   { key: 7, label: "Sun" },
 ]
 
+const getTodayWeekday = (): 1 | 2 | 3 | 4 | 5 | 6 | 7 => {
+  // getDay() returns 0 (Sun) - 6 (Sat); convert to 1 (Mon) - 7 (Sun)
+  const WEEKDAY_MAP = [7, 1, 2, 3, 4, 5, 6] as const
+  const day = new Date().getDay()
+  if (day < 0 || day > 6) {
+    throw new Error(`Invalid day from getDay(): ${day}`)
+  }
+  return WEEKDAY_MAP[day]
+}
+
 export function StudentScheduleView({ items }: { items: StudentScheduleItem[] }) {
   if (items.length === 0) {
     return (
@@ -27,6 +38,8 @@ export function StudentScheduleView({ items }: { items: StudentScheduleItem[] })
     )
   }
 
+  const todayKey = getTodayWeekday()
+
   const itemsByDay = new Map<number, StudentScheduleItem[]>()
   for (const item of items) {
     const list = itemsByDay.get(item.weekday) ?? []
@@ -41,17 +54,33 @@ export function StudentScheduleView({ items }: { items: StudentScheduleItem[] })
     <div className="grid gap-4 lg:grid-cols-2">
       {WEEKDAYS.map((d) => {
         const dayItems = itemsByDay.get(d.key) ?? []
+        const isToday = d.key === todayKey
         return (
-          <Card key={d.key}>
+          <Card
+            key={d.key}
+            className={cn(
+              isToday && "border-primary ring-1 ring-primary/30 shadow-sm"
+            )}
+          >
             <CardHeader className="pb-3">
-              <CardTitle className="text-sm font-medium">{d.label}</CardTitle>
+              <CardTitle className="flex items-center gap-2 text-sm font-medium">
+                <span>{d.label}</span>
+                {isToday && (
+                  <span className="rounded-full bg-primary px-2 py-0.5 text-[10px] font-semibold uppercase tracking-wide text-primary-foreground">
+                    Today
+                  </span>
+                )}
+              </CardTitle>
             </CardHeader>
             <CardContent>
               {dayItems.length === 0 ? (
                 <div className="text-sm text-muted-foreground">No classes.</div>
               ) : (
                 <ScheduleList
-                  items={dayItems}
+                  items={dayItems.map((item) => ({
+                    ...item,
+                    href: `/student/learning/courses/${encodeURIComponent(item.classId)}`,
+                  }))}
                   variant="card"
                   spacingClassName="space-y-3"
                 />

src/shared/components/schedule/schedule-list.tsx

@@ -1,6 +1,7 @@
 "use client"
 
 import type { ReactNode } from "react"
+import Link from "next/link"
 import { Clock, MapPin } from "lucide-react"
 
 import { Badge } from "@/shared/components/ui/badge"
@@ -23,6 +24,8 @@ export interface ScheduleListItemData {
   endTime: string
   location?: string | null
   className?: string
+  /** Optional href to navigate to when the item is clicked */
+  href?: string
 }
 
 interface ScheduleListItemProps {
@@ -46,8 +49,8 @@ export function ScheduleListItem({
       ? "flex items-center justify-between border-b pb-4 last:border-0 last:pb-0"
       : "flex items-start justify-between gap-3 rounded-md border bg-card p-3"
 
-  return (
+  const content = (
-    <div key={item.id} className={cn(wrapperClass, className)}>
+    <>
       <div className="space-y-1 min-w-0">
         <div className="font-medium leading-none truncate">{item.course}</div>
         <div className="flex flex-wrap items-center gap-x-3 gap-y-1 text-sm text-muted-foreground">
@@ -72,6 +75,23 @@ export function ScheduleListItem({
           {item.className}
         </Badge>
       ) : null}
+    </>
+  )
+
+  if (item.href) {
+    return (
+      <Link
+        href={item.href}
+        className={cn(wrapperClass, className, "transition-colors hover:bg-muted/40 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring")}
+      >
+        {content}
+      </Link>
+    )
+  }
+
+  return (
+    <div className={cn(wrapperClass, className)}>
+      {content}
     </div>
   )
 }