feat: 新增备课模块并修复全模块 P0/P1/P2 缺陷

主要变更:

- 新增 lesson-preparation 模块: 备课编辑器、节点编辑、AI 建议、知识点选择、版本历史、作业发布

- 新增 shared 通用组件: charts/question-bank-filters/schedule-list/ui (chip-nav/filter-bar/page-header/stat-card/stat-item)

- 新增 student/admin 端 loading.tsx 与 error.tsx, 优化加载与错误态体验

- 新增 teacher/lesson-plans 页面 (列表/新建/编辑)

- 新增 drizzle 迁移 0002_tiny_lionheart 及 snapshot

- 新增 textbooks/schema.ts 与 exams/utils/normalize-structure.ts

- 修复 Tiptap v3 SSR hydration 崩溃 (rich-text-block immediatelyRender: false)

- 重构多模块 data-access/actions/组件, 修复权限校验与类型规范

- 同步架构文档 004/005 反映新增模块、导出、依赖关系

- 归档 bugs/* 测试报告与 e2e 测试脚本 (admin/parent/student/teacher web_test)

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

@@ -1,137 +1,61 @@
 "use client"
 
 import { BarChart3 } from "lucide-react"
-import { CartesianGrid, Line, LineChart, XAxis, YAxis } from "recharts"
 
-import {
-  Card,
-  CardContent,
-  CardDescription,
-  CardHeader,
-  CardTitle,
-} from "@/shared/components/ui/card"
-import {
-  ChartContainer,
-  ChartTooltip,
-  ChartTooltipContent,
-} from "@/shared/components/ui/chart"
-import { EmptyState } from "@/shared/components/ui/empty-state"
+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 { GradeTrendResult } from "@/modules/grades/types"
 
-const chartConfig = {
-  normalizedScore: {
-    label: "Score (%)",
-    color: "hsl(var(--primary))",
-  },
-}
-
 interface GradeTrendChartProps {
   data: GradeTrendResult | null
 }
 
 export function GradeTrendChart({ data }: GradeTrendChartProps) {
-  if (!data || data.points.length === 0) {
-    return (
-      <Card>
-        <CardHeader>
-          <CardTitle className="flex items-center gap-2">
-            <BarChart3 className="h-4 w-4" />
-            Grade Trend
-          </CardTitle>
-          <CardDescription>
-            Score progression over time (normalized to 0-100).
-          </CardDescription>
-        </CardHeader>
-        <CardContent>
-          <EmptyState
-            icon={BarChart3}
-            title="No trend data"
-            description="Select a class and subject to view the grade trend."
-            className="border-none h-60"
-          />
-        </CardContent>
-      </Card>
-    )
-  }
+  const isEmpty = !data || data.points.length === 0
 
-  const chartData = data.points.map((p) => ({
-    title: p.title,
-    normalizedScore: p.normalizedScore,
-    fullTitle: p.title,
-    date: formatDate(p.date),
-    rawScore: p.score,
-    fullScore: p.fullScore,
-    type: p.type,
-  }))
+  const chartData = isEmpty
+    ? []
+    : data.points.map((p) => ({
+        title: p.title,
+        normalizedScore: p.normalizedScore,
+        fullTitle: p.title,
+        date: formatDate(p.date),
+        rawScore: p.score,
+        fullScore: p.fullScore,
+        type: p.type,
+      }))
 
   return (
-    <Card>
-      <CardHeader>
-        <CardTitle className="flex items-center gap-2">
-          <BarChart3 className="h-4 w-4" />
-          Grade Trend
-        </CardTitle>
-        <CardDescription>
-          {data.label} · avg {data.averageScore.toFixed(1)}%
-        </CardDescription>
-      </CardHeader>
-      <CardContent>
-        <ChartContainer config={chartConfig} className="h-[280px] w-full">
-          <LineChart
-            data={chartData}
-            margin={{ left: 8, right: 8, top: 8, bottom: 8 }}
-          >
-            <CartesianGrid
-              vertical={false}
-              strokeDasharray="4 4"
-              strokeOpacity={0.4}
-            />
-            <XAxis
-              dataKey="title"
-              tickLine={false}
-              axisLine={false}
-              tickMargin={8}
-              tickFormatter={(value: string) =>
-                value.length > 10 ? `${value.slice(0, 10)}...` : value
-              }
-            />
-            <YAxis
-              domain={[0, 100]}
-              tickLine={false}
-              axisLine={false}
-              tickFormatter={(value: number) => `${value}%`}
-              width={36}
-            />
-            <ChartTooltip
-              cursor={{
-                stroke: "hsl(var(--muted-foreground))",
-                strokeWidth: 1,
-                strokeDasharray: "4 4",
-              }}
-              content={
-                <ChartTooltipContent
-                  indicator="line"
-                  labelKey="fullTitle"
-                  className="w-[220px]"
-                />
-              }
-            />
-            <Line
-              dataKey="normalizedScore"
-              type="monotone"
-              stroke="var(--color-normalizedScore)"
-              strokeWidth={2}
-              dot={{
-                fill: "var(--color-normalizedScore)",
-                r: 3,
-                strokeWidth: 2,
-              }}
-              activeDot={{ r: 5, strokeWidth: 0 }}
-            />
-          </LineChart>
-        </ChartContainer>
-      </CardContent>
-    </Card>
+    <ChartCardShell
+      title="Grade Trend"
+      description={
+        isEmpty
+          ? "Score progression over time (normalized to 0-100)."
+          : `${data.label} · avg ${data.averageScore.toFixed(1)}%`
+      }
+      icon={BarChart3}
+      isEmpty={isEmpty}
+      emptyTitle="No trend data"
+      emptyDescription="Select a class and subject to view the grade trend."
+      emptyClassName="h-60"
+    >
+      <TrendLineChart
+        data={chartData}
+        series={[
+          {
+            dataKey: "normalizedScore",
+            name: "Score (%)",
+            color: "hsl(var(--primary))",
+            dotRadius: 3,
+            activeDotRadius: 5,
+          },
+        ]}
+        heightClassName="h-[280px]"
+        margin={{ left: 8, right: 8, top: 8, bottom: 8 }}
+        yWidth={36}
+        tooltipClassName="w-[220px]"
+      />
+    </ChartCardShell>
   )
 }