refactor(lesson-preparation,ai,dashboard): 组件化重构第 3 批 - 高风险模块

- lesson-preparation: 拆分 lesson-plan-editor (594→273)，新增 toolbar/dialogs/publish-button 子组件 + 持久化 Hook
- ai: 拆分 ai-chat-panel (417→218)，新增 messages/input 子组件，保持流式响应状态稳定
- dashboard: 新增 DashboardShell 布局壳，4 个角色 dashboard 统一使用
- 删除 6 个重复组件（filters/skeletons/error-boundaries）
- tsc 零错误

src/app/(dashboard)/admin/dashboard/loading.tsx

@@ -1,5 +1,5 @@
-import { DashboardLoadingSkeleton } from "@/modules/dashboard/components/dashboard-loading-skeleton"
+import { SkeletonCard } from "@/shared/components/ui/skeleton"
 
 export default function AdminDashboardLoading() {
-  return <DashboardLoadingSkeleton />
+  return <SkeletonCard variant="stats-grid" />
 }

src/app/(dashboard)/dashboard/loading.tsx

@@ -1,5 +1,5 @@
-import { DashboardLoadingSkeleton } from "@/modules/dashboard/components/dashboard-loading-skeleton"
+import { SkeletonCard } from "@/shared/components/ui/skeleton"
 
 export default function DashboardLoading() {
-  return <DashboardLoadingSkeleton />
+  return <SkeletonCard variant="stats-grid" />
 }

src/app/(dashboard)/student/dashboard/loading.tsx

@@ -1,5 +1,5 @@
-import { DashboardLoadingSkeleton } from "@/modules/dashboard/components/dashboard-loading-skeleton"
+import { SkeletonCard } from "@/shared/components/ui/skeleton"
 
 export default function StudentDashboardLoading() {
-  return <DashboardLoadingSkeleton />
+  return <SkeletonCard variant="stats-grid" />
 }

src/app/(dashboard)/teacher/dashboard/loading.tsx

@@ -1,5 +1,5 @@
-import { DashboardLoadingSkeleton } from "@/modules/dashboard/components/dashboard-loading-skeleton"
+import { SkeletonCard } from "@/shared/components/ui/skeleton"
 
 export default function TeacherDashboardLoading() {
-  return <DashboardLoadingSkeleton />
+  return <SkeletonCard variant="stats-grid" />
 }

src/modules/ai/components/ai-chat-input.tsx

@@ -0,0 +1,128 @@
+"use client"
+
+import { useTranslations } from "next-intl"
+import { Send, Square } from "lucide-react"
+
+import { Button } from "@/shared/components/ui/button"
+import { Textarea } from "@/shared/components/ui/textarea"
+
+type AiChatInputProps = {
+  value: string
+  onChange: (value: string) => void
+  onKeyDown: (e: React.KeyboardEvent<HTMLTextAreaElement>) => void
+  streaming: boolean
+  onSend: () => void
+  onStop: () => void
+  maxReached: boolean
+  variant: "card" | "widget"
+  placeholder?: string
+}
+
+/**
+ * AI 聊天输入框
+ *
+ * 渲染文本输入区域与发送/停止按钮，支持 card / widget 两种视觉变体。
+ * 纯展示组件，所有状态由容器通过 props 注入。
+ */
+export function AiChatInput({
+  value,
+  onChange,
+  onKeyDown,
+  streaming,
+  onSend,
+  onStop,
+  maxReached,
+  variant,
+  placeholder,
+}: AiChatInputProps): React.ReactNode {
+  const t = useTranslations("ai")
+  const isWidget = variant === "widget"
+
+  if (isWidget) {
+    return (
+      <div className="border-t p-3">
+        <div className="flex items-end gap-2">
+          <Textarea
+            value={value}
+            onChange={(e) => onChange(e.target.value)}
+            onKeyDown={onKeyDown}
+            placeholder={placeholder ?? t("chat.placeholder")}
+            className="min-h-10 max-h-32 resize-none rounded-2xl"
+            disabled={streaming || maxReached}
+            aria-label={t("chat.inputLabel")}
+          />
+          {streaming ? (
+            <Button
+              type="button"
+              size="icon"
+              variant="destructive"
+              className="rounded-full shrink-0"
+              onClick={onStop}
+              aria-label={t("chat.stopGeneration")}
+            >
+              <Square className="h-4 w-4" />
+            </Button>
+          ) : (
+            <Button
+              type="button"
+              size="icon"
+              className="rounded-full shrink-0"
+              onClick={onSend}
+              disabled={!value.trim() || maxReached}
+              aria-label={t("chat.send")}
+            >
+              <Send className="h-4 w-4" />
+            </Button>
+          )}
+        </div>
+        {maxReached ? (
+          <p className="text-xs text-muted-foreground text-center mt-2">
+            {t("chat.maxReached")}
+          </p>
+        ) : null}
+      </div>
+    )
+  }
+
+  return (
+    <>
+      <div className="flex gap-2">
+        <Textarea
+          value={value}
+          onChange={(e) => onChange(e.target.value)}
+          onKeyDown={onKeyDown}
+          placeholder={placeholder ?? t("chat.placeholder")}
+          className="min-h-16 resize-none"
+          disabled={streaming || maxReached}
+          aria-label={t("chat.inputLabel")}
+        />
+        {streaming ? (
+          <Button
+            type="button"
+            size="icon"
+            variant="destructive"
+            onClick={onStop}
+            aria-label={t("chat.stopGeneration")}
+          >
+            <Square className="h-4 w-4" />
+          </Button>
+        ) : (
+          <Button
+            type="button"
+            size="icon"
+            onClick={onSend}
+            disabled={!value.trim() || maxReached}
+            aria-label={t("chat.send")}
+          >
+            <Send className="h-4 w-4" />
+          </Button>
+        )}
+      </div>
+      {maxReached ? (
+        <p className="text-xs text-muted-foreground text-center">
+          {t("chat.maxReached")}
+        </p>
+      ) : null}
+    </>
+  )
+}

src/modules/ai/components/ai-chat-messages.tsx

@@ -0,0 +1,199 @@
+"use client"
+
+import type { RefObject } from "react"
+import { useTranslations } from "next-intl"
+import { Bot, User, Sparkles } from "lucide-react"
+
+import { cn } from "@/shared/lib/utils"
+import { Button } from "@/shared/components/ui/button"
+import { ScrollArea } from "@/shared/components/ui/scroll-area"
+import { AiMarkdownRenderer } from "./ai-markdown-renderer"
+import type { AiChatMessage } from "../types"
+
+type AiChatMessagesProps = {
+  messages: AiChatMessage[]
+  streaming: boolean
+  variant: "card" | "widget"
+  scrollRef: RefObject<HTMLDivElement | null>
+  suggestedPrompts: string[]
+  onSuggestedPrompt: (prompt: string) => void
+}
+
+/**
+ * AI 聊天消息列表：渲染消息气泡、流式指示器、空状态建议提示词。
+ * 支持 card / widget 两种视觉变体。纯展示组件，状态由容器注入。
+ */
+export function AiChatMessages({
+  messages,
+  streaming,
+  variant,
+  scrollRef,
+  suggestedPrompts,
+  onSuggestedPrompt,
+}: AiChatMessagesProps): React.ReactNode {
+  const t = useTranslations("ai")
+  const isWidget = variant === "widget"
+
+  if (messages.length > 0) {
+    if (isWidget) {
+      return (
+        <div
+          ref={scrollRef}
+          className="flex-1 overflow-y-auto px-4 py-4"
+          aria-live="polite"
+          aria-relevant="additions text"
+        >
+          <div className="space-y-4">
+            {messages.map((message, index) => (
+              <div
+                key={index}
+                className={cn(
+                  "flex gap-2.5",
+                  message.role === "user" ? "justify-end" : "justify-start"
+                )}
+              >
+                {message.role === "assistant" ? (
+                  <span className="flex h-7 w-7 shrink-0 items-center justify-center rounded-full bg-gradient-to-br from-primary to-primary/80 text-primary-foreground">
+                    <Bot className="h-4 w-4" />
+                  </span>
+                ) : (
+                  <span className="flex h-7 w-7 shrink-0 items-center justify-center rounded-full bg-muted text-muted-foreground">
+                    <User className="h-4 w-4" />
+                  </span>
+                )}
+                <div
+                  className={cn(
+                    "rounded-2xl px-3.5 py-2 text-sm max-w-[80%]",
+                    message.role === "user"
+                      ? "bg-primary text-primary-foreground rounded-tr-sm"
+                      : "bg-muted rounded-tl-sm"
+                  )}
+                >
+                  {message.role === "assistant" ? (
+                    <AiMarkdownRenderer content={message.content} />
+                  ) : (
+                    <p className="whitespace-pre-wrap">{message.content}</p>
+                  )}
+                </div>
+              </div>
+            ))}
+            {streaming ? (
+              <div className="flex gap-2.5 justify-start">
+                <span className="flex h-7 w-7 shrink-0 items-center justify-center rounded-full bg-gradient-to-br from-primary to-primary/80 text-primary-foreground">
+                  <Bot className="h-4 w-4" />
+                </span>
+                <div className="rounded-2xl rounded-tl-sm px-3.5 py-2 text-sm bg-muted">
+                  <span className="inline-flex gap-1">
+                    <span className="h-1.5 w-1.5 animate-bounce rounded-full bg-muted-foreground/60 [animation-delay:-0.3s]" />
+                    <span className="h-1.5 w-1.5 animate-bounce rounded-full bg-muted-foreground/60 [animation-delay:-0.15s]" />
+                    <span className="h-1.5 w-1.5 animate-bounce rounded-full bg-muted-foreground/60" />
+                  </span>
+                </div>
+              </div>
+            ) : null}
+          </div>
+        </div>
+      )
+    }
+
+    return (
+      <ScrollArea
+        className="h-72 w-full rounded-md border p-3"
+        aria-live="polite"
+        aria-relevant="additions text"
+      >
+        <div className="space-y-3" ref={scrollRef}>
+          {messages.map((message, index) => (
+            <div
+              key={index}
+              className={cn(
+                "flex gap-2",
+                message.role === "user" ? "justify-end" : "justify-start"
+              )}
+            >
+              {message.role === "assistant" ? (
+                <Bot className="h-5 w-5 shrink-0 text-primary mt-0.5" />
+              ) : (
+                <User className="h-5 w-5 shrink-0 text-muted-foreground mt-0.5" />
+              )}
+              <div
+                className={cn(
+                  // 任意值：聊天气泡需按容器宽度百分比限制，固定 max-w-* 无法适应不同面板宽度
+                  "rounded-md px-3 py-2 text-sm max-w-[80%]",
+                  message.role === "user"
+                    ? "bg-primary text-primary-foreground"
+                    : "bg-muted"
+                )}
+              >
+                {message.role === "assistant" ? (
+                  <AiMarkdownRenderer content={message.content} />
+                ) : (
+                  <p className="whitespace-pre-wrap">{message.content}</p>
+                )}
+              </div>
+            </div>
+          ))}
+          {streaming ? (
+            <div className="flex gap-2 justify-start">
+              <Bot className="h-5 w-5 shrink-0 text-primary mt-0.5" />
+              <div className="rounded-md px-3 py-2 text-sm bg-muted">
+                <span className="animate-pulse">{t("chat.streaming")}</span>
+                <span className="inline-block w-1 h-4 ml-1 bg-primary animate-pulse" />
+              </div>
+            </div>
+          ) : null}
+        </div>
+      </ScrollArea>
+    )
+  }
+
+  // 空状态：建议提示词
+  if (isWidget) {
+    return (
+      <div className="flex flex-1 flex-col items-center justify-center px-6 py-8">
+        <span className="flex h-14 w-14 items-center justify-center rounded-full bg-gradient-to-br from-primary to-primary/80 text-primary-foreground shadow-md mb-3">
+          <Sparkles className="h-7 w-7" />
+        </span>
+        <p className="text-base font-medium mb-1">{t("widget.welcome")}</p>
+        <p className="text-sm text-muted-foreground mb-4 text-center">{t("widget.welcomeDesc")}</p>
+        <div className="flex flex-wrap gap-2 justify-center max-w-sm">
+          {suggestedPrompts.map((prompt, index) => (
+            <Button
+              key={index}
+              type="button"
+              variant="outline"
+              size="sm"
+              className="text-xs rounded-full"
+              onClick={() => onSuggestedPrompt(prompt)}
+            >
+              {prompt}
+            </Button>
+          ))}
+        </div>
+      </div>
+    )
+  }
+
+  return (
+    <div className="rounded-md border border-dashed p-6 text-center">
+      <Sparkles className="h-8 w-8 text-primary mx-auto mb-2" />
+      <p className="text-sm text-muted-foreground mb-3">
+        {t("chat.suggestedPrompts.title")}
+      </p>
+      <div className="flex flex-wrap gap-2 justify-center">
+        {suggestedPrompts.map((prompt, index) => (
+          <Button
+            key={index}
+            type="button"
+            variant="outline"
+            size="sm"
+            className="text-xs"
+            onClick={() => onSuggestedPrompt(prompt)}
+          >
+            {prompt}
+          </Button>
+        ))}
+      </div>
+    </div>
+  )
+}

src/modules/ai/components/ai-chat-panel.tsx

@@ -2,22 +2,20 @@
 
 import { useState, useRef, useEffect, useCallback } from "react"
 import { useTranslations } from "next-intl"
-import { Send, Bot, User, Square, Trash2, Sparkles } from "lucide-react"
+import { Bot, Trash2 } from "lucide-react"
 import { toast } from "sonner"
 
-import { cn } from "@/shared/lib/utils"
 import { Button } from "@/shared/components/ui/button"
 import { Card, CardContent, CardHeader, CardTitle } from "@/shared/components/ui/card"
-import { Textarea } from "@/shared/components/ui/textarea"
-import { ScrollArea } from "@/shared/components/ui/scroll-area"
+import { SkeletonCard } from "@/shared/components/ui/skeleton"
 import {
   Tooltip,
   TooltipContent,
   TooltipProvider,
   TooltipTrigger,
 } from "@/shared/components/ui/tooltip"
-import { AiChatSkeleton } from "./ai-skeleton"
-import { AiMarkdownRenderer } from "./ai-markdown-renderer"
+import { AiChatMessages } from "./ai-chat-messages"
+import { AiChatInput } from "./ai-chat-input"
 import { useAiChatStream } from "../hooks/use-ai-chat-stream"
 import type { AiChatMessage } from "../types"
 
@@ -51,6 +49,9 @@ type AiChatPanelProps = {
  * - 建议提示词
  * - aria-live 无障碍
  * - 对话历史持久化（localStorage，防抖写入）
+ *
+ * 容器职责：持有 useAiChatStream（流式状态机 + AbortController ref）、
+ * 输入状态、事件编排。渲染委托给 AiChatMessages / AiChatInput 子组件。
  */
 export function AiChatPanel({
   systemPrompt,
@@ -66,6 +67,7 @@ export function AiChatPanel({
   const [input, setInput] = useState("")
   const scrollRef = useRef<HTMLDivElement>(null)
   const isWidget = variant === "widget"
+  const maxReached = messages.length >= maxMessages
 
   // 自动滚动到底部
   useEffect(() => {
@@ -77,7 +79,7 @@ export function AiChatPanel({
   const handleSend = useCallback(
     async (content?: string): Promise<void> => {
       const trimmed = (content ?? input).trim()
-      if (!trimmed || streaming || messages.length >= maxMessages) return
+      if (!trimmed || streaming || maxReached) return
 
       // 上下文信息合并到 systemPrompt 发送给 AI，用户气泡只显示真实输入
       const fullSystemPrompt = contextMessage
@@ -92,7 +94,7 @@ export function AiChatPanel({
       setInput("")
       await send(requestMessages, { systemPrompt: fullSystemPrompt })
     },
-    [input, streaming, messages, maxMessages, systemPrompt, contextMessage, send]
+    [input, streaming, messages, maxReached, systemPrompt, contextMessage, send]
   )
 
   const handleKeyDown = (e: React.KeyboardEvent<HTMLTextAreaElement>): void => {
@@ -109,12 +111,8 @@ export function AiChatPanel({
     }
   }
 
-  const handleSuggestedPrompt = (prompt: string): void => {
-    void handleSend(prompt)
-  }
-
   if (streaming && messages.length === 0) {
-    return <AiChatSkeleton />
+    return <SkeletonCard variant="chart" />
   }
 
   const defaultSuggestedPrompts = suggestedPrompts ?? [
@@ -123,7 +121,6 @@ export function AiChatPanel({
     t("chat.suggestedPrompts.teacher.2"),
   ]
 
-  // widget 变体：无边框、撑满容器、消息区自适应高度
   if (isWidget) {
     return (
       <div className="flex h-full flex-col">
@@ -135,129 +132,25 @@ export function AiChatPanel({
             {error}
           </div>
         ) : null}
-
-        {messages.length > 0 ? (
-          <div
-            ref={scrollRef}
-            className="flex-1 overflow-y-auto px-4 py-4"
-            aria-live="polite"
-            aria-relevant="additions text"
-          >
-            <div className="space-y-4">
-              {messages.map((message, index) => (
-                <div
-                  key={index}
-                  className={cn(
-                    "flex gap-2.5",
-                    message.role === "user" ? "justify-end" : "justify-start"
-                  )}
-                >
-                  {message.role === "assistant" ? (
-                    <span className="flex h-7 w-7 shrink-0 items-center justify-center rounded-full bg-gradient-to-br from-primary to-primary/80 text-primary-foreground">
-                      <Bot className="h-4 w-4" />
-                    </span>
-                  ) : (
-                    <span className="flex h-7 w-7 shrink-0 items-center justify-center rounded-full bg-muted text-muted-foreground">
-                      <User className="h-4 w-4" />
-                    </span>
-                  )}
-                  <div
-                    className={cn(
-                      "rounded-2xl px-3.5 py-2 text-sm max-w-[80%]",
-                      message.role === "user"
-                        ? "bg-primary text-primary-foreground rounded-tr-sm"
-                        : "bg-muted rounded-tl-sm"
-                    )}
-                  >
-                    {message.role === "assistant" ? (
-                      <AiMarkdownRenderer content={message.content} />
-                    ) : (
-                      <p className="whitespace-pre-wrap">{message.content}</p>
-                    )}
-                  </div>
-                </div>
-              ))}
-              {streaming ? (
-                <div className="flex gap-2.5 justify-start">
-                  <span className="flex h-7 w-7 shrink-0 items-center justify-center rounded-full bg-gradient-to-br from-primary to-primary/80 text-primary-foreground">
-                    <Bot className="h-4 w-4" />
-                  </span>
-                  <div className="rounded-2xl rounded-tl-sm px-3.5 py-2 text-sm bg-muted">
-                    <span className="inline-flex gap-1">
-                      <span className="h-1.5 w-1.5 animate-bounce rounded-full bg-muted-foreground/60 [animation-delay:-0.3s]" />
-                      <span className="h-1.5 w-1.5 animate-bounce rounded-full bg-muted-foreground/60 [animation-delay:-0.15s]" />
-                      <span className="h-1.5 w-1.5 animate-bounce rounded-full bg-muted-foreground/60" />
-                    </span>
-                  </div>
-                </div>
-              ) : null}
-            </div>
-          </div>
-        ) : (
-          <div className="flex flex-1 flex-col items-center justify-center px-6 py-8">
-            <span className="flex h-14 w-14 items-center justify-center rounded-full bg-gradient-to-br from-primary to-primary/80 text-primary-foreground shadow-md mb-3">
-              <Sparkles className="h-7 w-7" />
-            </span>
-            <p className="text-base font-medium mb-1">{t("widget.welcome")}</p>
-            <p className="text-sm text-muted-foreground mb-4 text-center">{t("widget.welcomeDesc")}</p>
-            <div className="flex flex-wrap gap-2 justify-center max-w-sm">
-              {defaultSuggestedPrompts.map((prompt, index) => (
-                <Button
-                  key={index}
-                  type="button"
-                  variant="outline"
-                  size="sm"
-                  className="text-xs rounded-full"
-                  onClick={() => handleSuggestedPrompt(prompt)}
-                >
-                  {prompt}
-                </Button>
-              ))}
-            </div>
-          </div>
-        )}
-
-        <div className="border-t p-3">
-          <div className="flex items-end gap-2">
-            <Textarea
-              value={input}
-              onChange={(e) => setInput(e.target.value)}
-              onKeyDown={handleKeyDown}
-              placeholder={placeholder ?? t("chat.placeholder")}
-              className="min-h-10 max-h-32 resize-none rounded-2xl"
-              disabled={streaming || messages.length >= maxMessages}
-              aria-label={t("chat.inputLabel")}
+        <AiChatMessages
+          messages={messages}
+          streaming={streaming}
+          variant={variant}
+          scrollRef={scrollRef}
+          suggestedPrompts={defaultSuggestedPrompts}
+          onSuggestedPrompt={(prompt) => void handleSend(prompt)}
+        />
+        <AiChatInput
+          value={input}
+          onChange={setInput}
+          onKeyDown={handleKeyDown}
+          streaming={streaming}
+          onSend={() => void handleSend()}
+          onStop={stop}
+          maxReached={maxReached}
+          variant={variant}
+          placeholder={placeholder}
         />
-            {streaming ? (
-              <Button
-                type="button"
-                size="icon"
-                variant="destructive"
-                className="rounded-full shrink-0"
-                onClick={stop}
-                aria-label={t("chat.stopGeneration")}
-              >
-                <Square className="h-4 w-4" />
-              </Button>
-            ) : (
-              <Button
-                type="button"
-                size="icon"
-                className="rounded-full shrink-0"
-                onClick={() => void handleSend()}
-                disabled={!input.trim() || messages.length >= maxMessages}
-                aria-label={t("chat.send")}
-              >
-                <Send className="h-4 w-4" />
-              </Button>
-            )}
-          </div>
-          {messages.length >= maxMessages ? (
-            <p className="text-xs text-muted-foreground text-center mt-2">
-              {t("chat.maxReached")}
-            </p>
-          ) : null}
-        </div>
       </div>
     )
   }
@@ -300,117 +193,25 @@ export function AiChatPanel({
             {error}
           </div>
         ) : null}
-
-        {messages.length > 0 ? (
-          <ScrollArea
-            className="h-72 w-full rounded-md border p-3"
-            aria-live="polite"
-            aria-relevant="additions text"
-          >
-            <div className="space-y-3" ref={scrollRef}>
-              {messages.map((message, index) => (
-                <div
-                  key={index}
-                  className={cn(
-                    "flex gap-2",
-                    message.role === "user" ? "justify-end" : "justify-start"
-                  )}
-                >
-                  {message.role === "assistant" ? (
-                    <Bot className="h-5 w-5 shrink-0 text-primary mt-0.5" />
-                  ) : (
-                    <User className="h-5 w-5 shrink-0 text-muted-foreground mt-0.5" />
-                  )}
-                  <div
-                    className={cn(
-                      // 任意值：聊天气泡需按容器宽度百分比限制，固定 max-w-* 无法适应不同面板宽度
-                      "rounded-md px-3 py-2 text-sm max-w-[80%]",
-                      message.role === "user"
-                        ? "bg-primary text-primary-foreground"
-                        : "bg-muted"
-                    )}
-                  >
-                    {message.role === "assistant" ? (
-                      <AiMarkdownRenderer content={message.content} />
-                    ) : (
-                      <p className="whitespace-pre-wrap">{message.content}</p>
-                    )}
-                  </div>
-                </div>
-              ))}
-              {streaming ? (
-                <div className="flex gap-2 justify-start">
-                  <Bot className="h-5 w-5 shrink-0 text-primary mt-0.5" />
-                  <div className="rounded-md px-3 py-2 text-sm bg-muted">
-                    <span className="animate-pulse">{t("chat.streaming")}</span>
-                    <span className="inline-block w-1 h-4 ml-1 bg-primary animate-pulse" />
-                  </div>
-                </div>
-              ) : null}
-            </div>
-          </ScrollArea>
-        ) : (
-          <div className="space-y-3">
-            <div className="rounded-md border border-dashed p-6 text-center">
-              <Sparkles className="h-8 w-8 text-primary mx-auto mb-2" />
-              <p className="text-sm text-muted-foreground mb-3">
-                {t("chat.suggestedPrompts.title")}
-              </p>
-              <div className="flex flex-wrap gap-2 justify-center">
-                {defaultSuggestedPrompts.map((prompt, index) => (
-                  <Button
-                    key={index}
-                    type="button"
-                    variant="outline"
-                    size="sm"
-                    className="text-xs"
-                    onClick={() => handleSuggestedPrompt(prompt)}
-                  >
-                    {prompt}
-                  </Button>
-                ))}
-              </div>
-            </div>
-          </div>
-        )}
-
-        <div className="flex gap-2">
-          <Textarea
-            value={input}
-            onChange={(e) => setInput(e.target.value)}
-            onKeyDown={handleKeyDown}
-            placeholder={placeholder ?? t("chat.placeholder")}
-            className="min-h-16 resize-none"
-            disabled={streaming || messages.length >= maxMessages}
-            aria-label={t("chat.inputLabel")}
+        <AiChatMessages
+          messages={messages}
+          streaming={streaming}
+          variant={variant}
+          scrollRef={scrollRef}
+          suggestedPrompts={defaultSuggestedPrompts}
+          onSuggestedPrompt={(prompt) => void handleSend(prompt)}
+        />
+        <AiChatInput
+          value={input}
+          onChange={setInput}
+          onKeyDown={handleKeyDown}
+          streaming={streaming}
+          onSend={() => void handleSend()}
+          onStop={stop}
+          maxReached={maxReached}
+          variant={variant}
+          placeholder={placeholder}
         />
-          {streaming ? (
-            <Button
-              type="button"
-              size="icon"
-              variant="destructive"
-              onClick={stop}
-              aria-label={t("chat.stopGeneration")}
-            >
-              <Square className="h-4 w-4" />
-            </Button>
-          ) : (
-            <Button
-              type="button"
-              size="icon"
-              onClick={() => void handleSend()}
-              disabled={!input.trim() || messages.length >= maxMessages}
-              aria-label={t("chat.send")}
-            >
-              <Send className="h-4 w-4" />
-            </Button>
-          )}
-        </div>
-        {messages.length >= maxMessages ? (
-          <p className="text-xs text-muted-foreground text-center">
-            {t("chat.maxReached")}
-          </p>
-        ) : null}
       </CardContent>
     </Card>
   )

src/modules/ai/components/ai-child-summary.tsx

@@ -8,8 +8,8 @@ import { toast } from "sonner"
 import { Button } from "@/shared/components/ui/button"
 import { Card, CardContent, CardHeader, CardTitle, CardDescription } from "@/shared/components/ui/card"
 import { Badge } from "@/shared/components/ui/badge"
-import { AiErrorBoundary } from "@/modules/ai/components/ai-error-boundary"
-import { AiSuggestionSkeleton } from "@/modules/ai/components/ai-skeleton"
+import { SectionErrorBoundary } from "@/shared/components/section-error-boundary"
+import { SkeletonCard } from "@/shared/components/ui/skeleton"
 import { AiMarkdownRenderer } from "@/modules/ai/components/ai-markdown-renderer"
 import { useAiClient } from "@/modules/ai/context/ai-client-provider"
 import type { ChildSummaryResult, ChildSummaryInput } from "@/modules/ai/types"
@@ -76,7 +76,7 @@ export function AiChildSummary({
   }
 
   return (
-    <AiErrorBoundary>
+    <SectionErrorBoundary namespace="ai">
       <Card>
         <CardHeader>
           <CardTitle className="flex items-center gap-2">
@@ -87,7 +87,7 @@ export function AiChildSummary({
         </CardHeader>
         <CardContent className="space-y-4">
           {loading ? (
-            <AiSuggestionSkeleton />
+            <SkeletonCard variant="chart" />
           ) : summary ? (
             <div className="space-y-4">
               {/* 整体评估 */}
@@ -181,6 +181,6 @@ export function AiChildSummary({
           )}
         </CardContent>
       </Card>
-    </AiErrorBoundary>
+    </SectionErrorBoundary>
   )
 }

src/modules/ai/components/ai-error-book-analysis.tsx

@@ -8,8 +8,8 @@ import { toast } from "sonner"
 import { Button } from "@/shared/components/ui/button"
 import { Card, CardContent, CardHeader, CardTitle, CardDescription } from "@/shared/components/ui/card"
 import { Badge } from "@/shared/components/ui/badge"
-import { AiErrorBoundary } from "@/modules/ai/components/ai-error-boundary"
-import { AiSuggestionSkeleton } from "@/modules/ai/components/ai-skeleton"
+import { SectionErrorBoundary } from "@/shared/components/section-error-boundary"
+import { SkeletonCard } from "@/shared/components/ui/skeleton"
 import { useAiClient } from "@/modules/ai/context/ai-client-provider"
 import type { WeaknessAnalysisResult, SimilarQuestionResult } from "@/modules/ai/types"
 
@@ -110,7 +110,7 @@ export function AiErrorBookAnalysis({
   }
 
   return (
-    <AiErrorBoundary>
+    <SectionErrorBoundary namespace="ai">
       <div className="space-y-4">
         {/* 相似题推荐 */}
         {currentQuestionText ? (
@@ -124,7 +124,7 @@ export function AiErrorBookAnalysis({
             </CardHeader>
             <CardContent className="space-y-3">
               {similarLoading ? (
-                <AiSuggestionSkeleton />
+                <SkeletonCard variant="chart" />
               ) : similarQuestions.length > 0 ? (
                 <>
                   {similarQuestions.map((question, index) => (
@@ -184,7 +184,7 @@ export function AiErrorBookAnalysis({
           </CardHeader>
           <CardContent className="space-y-3">
             {weaknessLoading ? (
-              <AiSuggestionSkeleton />
+              <SkeletonCard variant="chart" />
             ) : weaknessResult ? (
               <div className="space-y-4">
                 <div className="space-y-2">
@@ -241,6 +241,6 @@ export function AiErrorBookAnalysis({
           </CardContent>
         </Card>
       </div>
-    </AiErrorBoundary>
+    </SectionErrorBoundary>
   )
 }

src/modules/ai/components/ai-error-boundary.tsx

@@ -1,31 +0,0 @@
-"use client"
-
-/**
- * AI 专用 Error Boundary
- *
- * 薄包装：委托给共享 SectionErrorBoundary，使用 ai 命名空间。
- * 保留同名导出以兼容现有 import。
- */
-
-import type { ReactNode } from "react"
-import { SectionErrorBoundary } from "@/shared/components/section-error-boundary"
-
-type AiErrorBoundaryProps = {
-  children: ReactNode
-  /** 自定义 fallback 渲染 */
-  fallback?: (error: Error, reset: () => void) => ReactNode
-  /** 错误回调（用于埋点） */
-  onError?: (error: Error, info: unknown) => void
-}
-
-export function AiErrorBoundary({
-  children,
-  fallback,
-  onError,
-}: AiErrorBoundaryProps): ReactNode {
-  return (
-    <SectionErrorBoundary namespace="ai" fallback={fallback} onError={onError}>
-      {children}
-    </SectionErrorBoundary>
-  )
-}

src/modules/ai/components/ai-grading-assist.tsx

@@ -9,8 +9,8 @@ import { Button } from "@/shared/components/ui/button"
 import { Card, CardContent, CardHeader, CardTitle, CardDescription } from "@/shared/components/ui/card"
 import { Badge } from "@/shared/components/ui/badge"
 import { Progress } from "@/shared/components/ui/progress"
-import { AiErrorBoundary } from "@/modules/ai/components/ai-error-boundary"
-import { AiSuggestionSkeleton } from "@/modules/ai/components/ai-skeleton"
+import { SectionErrorBoundary } from "@/shared/components/section-error-boundary"
+import { SkeletonCard } from "@/shared/components/ui/skeleton"
 import { useAiClient } from "@/modules/ai/context/ai-client-provider"
 import type { GradingSuggestion } from "@/modules/ai/types"
 
@@ -87,7 +87,7 @@ export function AiGradingAssist({
   const confidencePercent = suggestion ? Math.round(suggestion.confidence * 100) : 0
 
   return (
-    <AiErrorBoundary>
+    <SectionErrorBoundary namespace="ai">
       <Card>
         <CardHeader>
           <CardTitle className="flex items-center gap-2">
@@ -98,7 +98,7 @@ export function AiGradingAssist({
         </CardHeader>
         <CardContent className="space-y-3">
           {loading ? (
-            <AiSuggestionSkeleton />
+            <SkeletonCard variant="chart" />
           ) : suggestion ? (
             <div className="space-y-4">
               <div className="space-y-2">
@@ -168,6 +168,6 @@ export function AiGradingAssist({
           )}
         </CardContent>
       </Card>
-    </AiErrorBoundary>
+    </SectionErrorBoundary>
   )
 }

src/modules/ai/components/ai-lesson-content-generator.tsx

@@ -9,8 +9,8 @@ import { Button } from "@/shared/components/ui/button"
 import { Card, CardContent, CardHeader, CardTitle, CardDescription } from "@/shared/components/ui/card"
 import { Textarea } from "@/shared/components/ui/textarea"
 import { Badge } from "@/shared/components/ui/badge"
-import { AiErrorBoundary } from "@/modules/ai/components/ai-error-boundary"
-import { AiSuggestionSkeleton } from "@/modules/ai/components/ai-skeleton"
+import { SectionErrorBoundary } from "@/shared/components/section-error-boundary"
+import { SkeletonCard } from "@/shared/components/ui/skeleton"
 import { useAiClient } from "@/modules/ai/context/ai-client-provider"
 import type { LessonContentResult } from "@/modules/ai/types"
 
@@ -91,7 +91,7 @@ export function AiLessonContentGenerator({
   ]
 
   return (
-    <AiErrorBoundary>
+    <SectionErrorBoundary namespace="ai">
       <Card>
         <CardHeader>
           <CardTitle className="flex items-center gap-2">
@@ -146,7 +146,7 @@ export function AiLessonContentGenerator({
 
           {/* 生成结果 */}
           {loading ? (
-            <AiSuggestionSkeleton />
+            <SkeletonCard variant="chart" />
           ) : result ? (
             <div className="space-y-3 rounded-md border p-3">
               <div className="flex items-center justify-between gap-2">
@@ -175,6 +175,6 @@ export function AiLessonContentGenerator({
           ) : null}
         </CardContent>
       </Card>
-    </AiErrorBoundary>
+    </SectionErrorBoundary>
   )
 }

src/modules/ai/components/ai-question-variant-generator.tsx

@@ -15,8 +15,8 @@ import {
   SelectTrigger,
   SelectValue,
 } from "@/shared/components/ui/select"
-import { AiErrorBoundary } from "@/modules/ai/components/ai-error-boundary"
-import { AiSuggestionSkeleton } from "@/modules/ai/components/ai-skeleton"
+import { SectionErrorBoundary } from "@/shared/components/section-error-boundary"
+import { SkeletonCard } from "@/shared/components/ui/skeleton"
 import { useAiClient } from "@/modules/ai/context/ai-client-provider"
 import type { QuestionVariantResult } from "@/modules/ai/types"
 
@@ -96,7 +96,7 @@ export function AiQuestionVariantGenerator({
   }
 
   return (
-    <AiErrorBoundary>
+    <SectionErrorBoundary namespace="ai">
       <Card>
         <CardHeader>
           <CardTitle className="flex items-center gap-2">
@@ -149,7 +149,7 @@ export function AiQuestionVariantGenerator({
 
           {/* 生成结果 */}
           {loading ? (
-            <AiSuggestionSkeleton />
+            <SkeletonCard variant="chart" />
           ) : variant ? (
             <div className="space-y-3 rounded-md border p-3">
               <div className="flex items-center justify-between gap-2">
@@ -213,6 +213,6 @@ export function AiQuestionVariantGenerator({
           ) : null}
         </CardContent>
       </Card>
-    </AiErrorBoundary>
+    </SectionErrorBoundary>
   )
 }

src/modules/ai/components/ai-skeleton.tsx

@@ -1,47 +0,0 @@
-import { Card, CardContent, CardHeader } from "@/shared/components/ui/card"
-import { Skeleton } from "@/shared/components/ui/skeleton"
-
-/**
- * AI 建议加载骨架屏
- *
- * 在 AI 异步调用期间显示，提供视觉反馈。
- */
-export function AiSuggestionSkeleton(): React.ReactNode {
-  return (
-    <Card>
-      <CardHeader>
-        <Skeleton className="h-5 w-32" />
-      </CardHeader>
-      <CardContent className="space-y-3">
-        <Skeleton className="h-4 w-full" />
-        <Skeleton className="h-4 w-3/4" />
-        <Skeleton className="h-4 w-5/6" />
-        <div className="flex gap-2 pt-2">
-          <Skeleton className="h-8 w-20" />
-          <Skeleton className="h-8 w-20" />
-        </div>
-      </CardContent>
-    </Card>
-  )
-}
-
-/**
- * AI 聊天加载骨架屏
- */
-export function AiChatSkeleton(): React.ReactNode {
-  return (
-    <Card>
-      <CardHeader>
-        <Skeleton className="h-5 w-24" />
-      </CardHeader>
-      <CardContent className="space-y-4">
-        <div className="space-y-2">
-          <Skeleton className="h-4 w-full" />
-          <Skeleton className="h-4 w-5/6" />
-          <Skeleton className="h-4 w-4/6" />
-        </div>
-        <Skeleton className="h-10 w-full" />
-      </CardContent>
-    </Card>
-  )
-}

src/modules/ai/components/ai-study-path.tsx

@@ -8,8 +8,8 @@ import { toast } from "sonner"
 import { Button } from "@/shared/components/ui/button"
 import { Card, CardContent, CardHeader, CardTitle, CardDescription } from "@/shared/components/ui/card"
 import { Badge } from "@/shared/components/ui/badge"
-import { AiErrorBoundary } from "@/modules/ai/components/ai-error-boundary"
-import { AiSuggestionSkeleton } from "@/modules/ai/components/ai-skeleton"
+import { SectionErrorBoundary } from "@/shared/components/section-error-boundary"
+import { SkeletonCard } from "@/shared/components/ui/skeleton"
 import { useAiClient } from "@/modules/ai/context/ai-client-provider"
 import type { StudyPathResult, StudyPathInput } from "@/modules/ai/types"
 
@@ -98,7 +98,7 @@ export function AiStudyPath({
   }
 
   return (
-    <AiErrorBoundary>
+    <SectionErrorBoundary namespace="ai">
       <Card>
         <CardHeader>
           <CardTitle className="flex items-center gap-2">
@@ -109,7 +109,7 @@ export function AiStudyPath({
         </CardHeader>
         <CardContent className="space-y-4">
           {loading ? (
-            <AiSuggestionSkeleton />
+            <SkeletonCard variant="chart" />
           ) : path ? (
             <div className="space-y-4">
               {/* 当前水平 */}
@@ -195,6 +195,6 @@ export function AiStudyPath({
           )}
         </CardContent>
       </Card>
-    </AiErrorBoundary>
+    </SectionErrorBoundary>
   )
 }

src/modules/ai/components/ai-usage-dashboard.tsx

@@ -9,7 +9,7 @@ import { Card, CardContent, CardHeader, CardTitle, CardDescription } from "@/sha
 import { Badge } from "@/shared/components/ui/badge"
 import { Progress } from "@/shared/components/ui/progress"
 import { Button } from "@/shared/components/ui/button"
-import { AiErrorBoundary } from "@/modules/ai/components/ai-error-boundary"
+import { SectionErrorBoundary } from "@/shared/components/section-error-boundary"
 import { useAiClient } from "@/modules/ai/context/ai-client-provider"
 import type { AiUsageStats } from "@/modules/ai/types"
 
@@ -84,7 +84,7 @@ export function AiUsageDashboard(): React.ReactNode {
     : []
 
   return (
-    <AiErrorBoundary>
+    <SectionErrorBoundary namespace="ai">
       <Card>
         <CardHeader>
           <div className="flex items-center justify-between">
@@ -215,6 +215,6 @@ export function AiUsageDashboard(): React.ReactNode {
           )}
         </CardContent>
       </Card>
-    </AiErrorBoundary>
+    </SectionErrorBoundary>
   )
 }

src/modules/dashboard/components/admin-dashboard/admin-dashboard.tsx

@@ -5,16 +5,21 @@ import { getTranslations } from "next-intl/server"
 import {
   CalendarCheck,
   CalendarClock,
+  ClipboardList,
+  FileText,
   FolderOpen,
+  LayoutDashboard,
   Megaphone,
   Upload,
+  Users,
 } from "lucide-react"
 
+import type { StatItem } from "@/shared/components/ui/stats-grid"
 import { Card, CardContent } from "@/shared/components/ui/card"
-import { PageHeader } from "@/shared/components/ui/page-header"
 import { Button } from "@/shared/components/ui/button"
 import { Badge } from "@/shared/components/ui/badge"
 import { Skeleton } from "@/shared/components/ui/skeleton"
+import { DashboardShell } from "../dashboard-shell"
 import { DashboardSection } from "../dashboard-section"
 import { DashboardTimeRangeFilter } from "../dashboard-time-range-filter"
 import type { AdminDashboardStreams } from "../../streams"
@@ -23,7 +28,6 @@ import {
   AdminHeaderBadges,
   AdminHomeworkActivityCard,
   AdminRecentUsersTable,
-  AdminStatsBar,
   AdminTrendCharts,
   AdminUserRolesCard,
 } from "./admin-sections"
@@ -31,17 +35,58 @@ import {
 /**
  * 管理员仪表盘视图（P2-1 流式架构）
  *
- * 页面外壳（标题 + 快捷操作）立即渲染；各数据分区用 React `use()` 独立消费 streams 中的 Promise，
+ * 页面外壳（标题 + 快捷操作 + 统计卡片）立即渲染；各数据分区用 React `use()` 独立消费 streams 中的 Promise，
  * 在各自的 `<DashboardSection>` Suspense 边界内流式填充，互不阻塞。
  */
-export async function AdminDashboardView({ streams }: { streams: AdminDashboardStreams }) {
+export async function AdminDashboardView({ streams }: { streams: AdminDashboardStreams }): Promise<ReactNode> {
   const t = await getTranslations("dashboard")
 
+  const [usersStats, classesStats, homeworkStats] = await Promise.all([
+    streams.usersStats,
+    streams.classesStats,
+    streams.homeworkStats,
+  ])
+
+  const stats: StatItem[] = [
+    {
+      label: t("stats.users"),
+      value: usersStats.userCount,
+      icon: Users,
+      color: "text-blue-500",
+      valueClassName: "tabular-nums",
+      href: "/admin/users",
+    },
+    {
+      label: t("stats.classes"),
+      value: classesStats.classCount,
+      icon: LayoutDashboard,
+      color: "text-emerald-500",
+      valueClassName: "tabular-nums",
+      href: "/admin/school/classes",
+    },
+    {
+      label: t("stats.homeworkPublished"),
+      value: homeworkStats.homeworkAssignmentPublishedCount,
+      icon: ClipboardList,
+      color: "text-purple-500",
+      valueClassName: "tabular-nums",
+      href: "/admin/homework/assignments",
+    },
+    {
+      label: t("stats.toGrade"),
+      value: homeworkStats.homeworkSubmissionToGradeCount,
+      icon: FileText,
+      color: "text-amber-500",
+      valueClassName: "tabular-nums",
+      href: "/admin/homework/submissions?status=submitted",
+    },
+  ]
+
   return (
-    <div className="flex h-full flex-col space-y-8 p-8">
-      <PageHeader
+    <DashboardShell
       title={t("title.admin")}
       description={t("description.admin")}
+      stats={stats}
       actions={
         <>
           <Button asChild variant="outline" size="sm" className="gap-2">
@@ -61,12 +106,7 @@ export async function AdminDashboardView({ streams }: { streams: AdminDashboardS
           </Suspense>
         </>
       }
-      />
-
-      <DashboardSection variant="stats" ariaLabel={t("sections.quickStats")}>
-        <AdminStatsBar t={t} streams={streams} />
-      </DashboardSection>
-
+    >
       {/* L2: 时间范围筛选器 — 当前为 UI 占位，趋势数据接入后生效 */}
       <div className="flex justify-end">
         <DashboardTimeRangeFilter />
@@ -131,7 +171,7 @@ export async function AdminDashboardView({ streams }: { streams: AdminDashboardS
       <DashboardSection variant="table" ariaLabel={t("sections.recentUsers")}>
         <AdminRecentUsersTable t={t} streams={streams} />
       </DashboardSection>
-    </div>
+    </DashboardShell>
   )
 }
 
@@ -160,7 +200,7 @@ function QuickActionCard({
   icon: React.ComponentType<{ className?: string }>
   title: string
   description: string
-}) {
+}): ReactNode {
   return (
     <Link href={href}>
       <Card className="transition-colors hover:border-primary/50 hover:bg-accent/50">

src/modules/dashboard/components/admin-dashboard/admin-sections.tsx

@@ -6,14 +6,12 @@ import {
   BookOpen,
   ClipboardList,
   FileText,
-  LayoutDashboard,
   Library,
   Users,
   ChevronRight,
 } from "lucide-react"
 
 import { Card, CardContent, CardHeader, CardTitle } from "@/shared/components/ui/card"
-import { StatCard } from "@/shared/components/ui/stat-card"
 import { Badge } from "@/shared/components/ui/badge"
 import { Button } from "@/shared/components/ui/button"
 import { EmptyState } from "@/shared/components/ui/empty-state"
@@ -24,25 +22,6 @@ import { UserGrowthChart } from "./user-growth-chart"
 
 type TranslationFunction = Awaited<ReturnType<typeof import("next-intl/server").getTranslations>>
 
-// ─── 顶部统计栏 ────────────────────────────────────────────
-
-export function AdminStatsBar({ t, streams }: { t: TranslationFunction; streams: AdminDashboardStreams }) {
-  const [usersStats, classesStats, homeworkStats] = use(Promise.all([
-    streams.usersStats,
-    streams.classesStats,
-    streams.homeworkStats,
-  ]))
-
-  return (
-    <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-4">
-      <StatCard title={t("stats.users")} value={usersStats.userCount} icon={Users} color="text-blue-500" valueClassName="tabular-nums" href="/admin/users" />
-      <StatCard title={t("stats.classes")} value={classesStats.classCount} icon={LayoutDashboard} color="text-emerald-500" valueClassName="tabular-nums" href="/admin/school/classes" />
-      <StatCard title={t("stats.homeworkPublished")} value={homeworkStats.homeworkAssignmentPublishedCount} icon={ClipboardList} color="text-purple-500" valueClassName="tabular-nums" href="/admin/homework/assignments" />
-      <StatCard title={t("stats.toGrade")} value={homeworkStats.homeworkSubmissionToGradeCount} icon={FileText} color="text-amber-500" valueClassName="tabular-nums" href="/admin/homework/submissions?status=submitted" />
-    </div>
-  )
-}
-
 // ─── 页头徽章（活跃会话 + 用户数） ─────────────────────────
 
 export function AdminHeaderBadges({ t, streams }: { t: TranslationFunction; streams: AdminDashboardStreams }) {

src/modules/dashboard/components/dashboard-greeting-header.tsx

@@ -1,35 +0,0 @@
-import type { ReactNode } from "react"
-import { getLocale, getTranslations } from "next-intl/server"
-import { formatLongDate } from "@/shared/lib/utils"
-import { getGreetingKey } from "@/modules/dashboard/lib/dashboard-utils"
-
-/**
- * 仪表盘问候语头部（共享组件）
- *
- * 教师与学生仪表盘头部 90% 重复，统一抽象为此组件。
- * 通过 `actions` slot 注入角色专属快捷操作。
- */
-export async function DashboardGreetingHeader({
-  userName,
-  actions,
-}: {
-  userName: string
-  actions?: ReactNode
-}) {
-  const t = await getTranslations("dashboard")
-  const locale = await getLocale()
-  const today = formatLongDate(new Date(), locale)
-  const greetingKey = getGreetingKey(new Date())
-
-  return (
-    <div className="flex flex-col justify-between space-y-4 md:flex-row md:items-center md:space-y-0">
-      <div>
-        <h2 className="text-2xl font-bold tracking-tight">
-          {userName ? `${t(`greeting.${greetingKey}`)}，${userName}` : t(`greeting.${greetingKey}`)}
-        </h2>
-        <p className="text-muted-foreground">{t("greeting.todayIs", { date: today })}</p>
-      </div>
-      {actions}
-    </div>
-  )
-}

src/modules/dashboard/components/dashboard-loading-skeleton.tsx

@@ -1,44 +0,0 @@
-import { Card, CardContent, CardHeader } from "@/shared/components/ui/card"
-import { Skeleton } from "@/shared/components/ui/skeleton"
-
-/**
- * 仪表盘通用加载骨架屏。
- *
- * 用于各角色 dashboard 路由的 `loading.tsx`，消除重复代码。
- * 布局：页头 + 4 列统计卡片 + 列表骨架。
- */
-export function DashboardLoadingSkeleton() {
-  return (
-    <div className="flex h-full flex-col space-y-8 p-8">
-      <div className="space-y-2">
-        <Skeleton className="h-8 w-48" />
-        <Skeleton className="h-4 w-64" />
-      </div>
-
-      <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-4">
-        {Array.from({ length: 4 }).map((_, i) => (
-          <Card key={i}>
-            <CardHeader className="pb-2">
-              <Skeleton className="h-4 w-24" />
-            </CardHeader>
-            <CardContent>
-              <Skeleton className="h-8 w-16" />
-              <Skeleton className="mt-2 h-3 w-28" />
-            </CardContent>
-          </Card>
-        ))}
-      </div>
-
-      <Card>
-        <CardHeader>
-          <Skeleton className="h-5 w-32" />
-        </CardHeader>
-        <CardContent className="space-y-3">
-          {Array.from({ length: 6 }).map((_, i) => (
-            <Skeleton key={i} className="h-12 w-full" />
-          ))}
-        </CardContent>
-      </Card>
-    </div>
-  )
-}

src/modules/dashboard/components/dashboard-shell.tsx

@@ -0,0 +1,36 @@
+import type { ReactNode } from "react"
+
+import { PageHeader } from "@/shared/components/ui/page-header"
+import { StatsGrid, type StatItem } from "@/shared/components/ui/stats-grid"
+
+/**
+ * 仪表盘布局壳：统一的 PageHeader + StatsGrid + 内容区结构。
+ *
+ * 各角色 dashboard 通过此组件复用布局外壳，业务逻辑（stats 计算、内容区）保持独立。
+ * stats 为空时不渲染统计区，适配无统计指标的页面（如家长仪表盘）。
+ */
+interface DashboardShellProps {
+  title: string
+  description?: string
+  stats: StatItem[]
+  statsLoading?: boolean
+  children: ReactNode
+  actions?: ReactNode
+}
+
+export function DashboardShell({
+  title,
+  description,
+  stats,
+  statsLoading,
+  children,
+  actions,
+}: DashboardShellProps): ReactNode {
+  return (
+    <div className="space-y-6">
+      <PageHeader title={title} description={description} actions={actions} />
+      {stats.length > 0 ? <StatsGrid items={stats} isLoading={statsLoading} /> : null}
+      {children}
+    </div>
+  )
+}

src/modules/dashboard/components/parent-dashboard/parent-dashboard.tsx

@@ -12,6 +12,7 @@ import {
 import { Card, CardContent } from "@/shared/components/ui/card"
 import { EmptyState } from "@/shared/components/ui/empty-state"
 import { getGreetingKey } from "@/modules/dashboard/lib/dashboard-utils"
+import { DashboardShell } from "../dashboard-shell"
 
 /**
  * 家长仪表盘视图组件（V4 P1-4 从 parent 模块迁移至 dashboard 模块）。
@@ -37,7 +38,7 @@ export async function ParentDashboard({
   childrenSlot: ReactNode
   attentionBannerSlot: ReactNode
   aiSummarySlot?: ReactNode
-}) {
+}): Promise<ReactNode> {
   const t = await getTranslations("dashboard")
   const hasChildren = childrenCount > 0
   const greetingKey = getGreetingKey(new Date())
@@ -49,16 +50,10 @@ export async function ParentDashboard({
     { href: "/parent/leave", label: t("quickActions.leaveRequest"), icon: CalendarDays },
   ] as const
 
-  return (
-    <div className="space-y-6">
-      <div className="space-y-1">
-        <h1 className="text-2xl font-bold tracking-tight">{t("title.parent")}</h1>
-        <div className="text-sm text-muted-foreground">
-          {t(`greeting.${greetingKey}`)}
-          {parentName ? `, ${parentName}` : ""}. {t("description.parent")}
-        </div>
-      </div>
+  const description = `${t(`greeting.${greetingKey}`)}${parentName ? `, ${parentName}` : ""}. ${t("description.parent")}`
 
+  return (
+    <DashboardShell title={t("title.parent")} description={description} stats={[]}>
       {hasChildren ? (
         <>
           {attentionBannerSlot}
@@ -110,6 +105,6 @@ export async function ParentDashboard({
           }}
         />
       )}
-    </div>
+    </DashboardShell>
   )
 }

src/modules/dashboard/components/student-dashboard/student-dashboard-header.tsx

@@ -1,11 +0,0 @@
-import { DashboardGreetingHeader } from "../dashboard-greeting-header"
-
-interface StudentDashboardHeaderProps {
-  studentName: string
-}
-
-export function StudentDashboardHeader({ studentName }: StudentDashboardHeaderProps) {
-  return (
-    <DashboardGreetingHeader userName={studentName} />
-  )
-}

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

@@ -1,15 +1,26 @@
 import { use } from "react"
-import { getTranslations } from "next-intl/server"
-import { UserX } from "lucide-react"
+import type { ReactNode } from "react"
+import { getLocale, getTranslations } from "next-intl/server"
+import {
+  BookOpen,
+  CheckCircle,
+  PenTool,
+  TriangleAlert,
+  TrendingUp,
+  Trophy,
+  UserX,
+} from "lucide-react"
 
 import type { ActionState } from "@/shared/types/action-state"
 import type { StudentDashboardProps } from "@/modules/dashboard/types"
+import type { StatItem } from "@/shared/components/ui/stats-grid"
 import { EmptyState } from "@/shared/components/ui/empty-state"
+import { getGreetingKey } from "@/modules/dashboard/lib/dashboard-utils"
+import { formatLongDate } from "@/shared/lib/utils"
 
 import { DashboardSection } from "../dashboard-section"
-import { StudentDashboardHeader } from "./student-dashboard-header"
+import { DashboardShell } from "../dashboard-shell"
 import { StudentGradesCard } from "./student-grades-card"
-import { StudentStatsGrid } from "./student-stats-grid"
 import { StudentTodayScheduleCard } from "./student-today-schedule-card"
 import { StudentUpcomingAssignmentsCard } from "./student-upcoming-assignments-card"
 
@@ -37,7 +48,7 @@ async function StudentDashboardBody({
   result,
 }: {
   result: NonNullable<StudentDashboardResult["data"]>
-}) {
+}): Promise<ReactNode> {
   const t = await getTranslations("dashboard")
 
   if (!result.student || !result.dashboardProps) {
@@ -52,23 +63,76 @@ async function StudentDashboardBody({
   }
 
   const { student, dashboardProps } = result
+  const locale = await getLocale()
+  const today = formatLongDate(new Date(), locale)
+  const greetingKey = getGreetingKey(new Date())
+  const title = student.name
+    ? `${t(`greeting.${greetingKey}`)}，${student.name}`
+    : t(`greeting.${greetingKey}`)
+  const description = t("greeting.todayIs", { date: today })
+
+  const ranking = dashboardProps.grades.ranking
+  const stats: StatItem[] = [
+    {
+      label: t("stats.enrolledClasses"),
+      value: String(dashboardProps.enrolledClassCount),
+      description: t("stats.activeEnrollments"),
+      icon: BookOpen,
+      href: "/student/learning/courses",
+      color: "text-emerald-500",
+      valueClassName: "text-emerald-500 tabular-nums",
+    },
+    {
+      label: t("stats.averageScore"),
+      value: ranking ? `${Math.round(ranking.percentage)}%` : "-",
+      description: ranking ? t("stats.overallPerformance") : t("stats.noGradesYet"),
+      icon: TrendingUp,
+      href: "/student/grades",
+      color: "text-blue-500",
+      valueClassName: ranking ? "text-blue-500 tabular-nums" : "tabular-nums",
+    },
+    {
+      label: t("stats.classRank"),
+      value: ranking ? `${ranking.rank}/${ranking.classSize}` : "-",
+      description: ranking ? t("stats.currentPosition") : t("stats.noRankingYet"),
+      icon: Trophy,
+      href: "/student/grades",
+      color: "text-purple-500",
+      valueClassName: ranking ? "text-purple-500 tabular-nums" : "tabular-nums",
+    },
+    {
+      label: t("stats.graded"),
+      value: String(dashboardProps.gradedCount),
+      description: t("stats.completedAssignments"),
+      icon: CheckCircle,
+      href: "/student/learning/assignments",
+      color: "text-green-500",
+      valueClassName: "text-green-500 tabular-nums",
+    },
+    {
+      label: t("stats.dueSoon"),
+      value: String(dashboardProps.dueSoonCount),
+      description: t("stats.next7Days"),
+      icon: PenTool,
+      href: "/student/learning/assignments",
+      color: dashboardProps.dueSoonCount > 0 ? "text-orange-500" : undefined,
+      valueClassName:
+        dashboardProps.dueSoonCount > 0 ? "text-orange-500 tabular-nums" : "tabular-nums",
+    },
+    {
+      label: t("stats.overdue"),
+      value: String(dashboardProps.overdueCount),
+      description: t("stats.needsAttention"),
+      icon: TriangleAlert,
+      href: "/student/learning/assignments",
+      color: dashboardProps.overdueCount > 0 ? "text-red-500" : undefined,
+      valueClassName:
+        dashboardProps.overdueCount > 0 ? "text-red-500 tabular-nums" : "tabular-nums",
+    },
+  ]
 
   return (
-    <div className="space-y-6">
-      <header>
-        <StudentDashboardHeader studentName={student.name} />
-      </header>
-
-      <DashboardSection variant="stats" ariaLabel={t("sections.quickStats")}>
-        <StudentStatsGrid
-          enrolledClassCount={dashboardProps.enrolledClassCount}
-          dueSoonCount={dashboardProps.dueSoonCount}
-          overdueCount={dashboardProps.overdueCount}
-          gradedCount={dashboardProps.gradedCount}
-          ranking={dashboardProps.grades.ranking}
-        />
-      </DashboardSection>
-
+    <DashboardShell title={title} description={description} stats={stats}>
       <div className="grid grid-cols-1 lg:grid-cols-3 gap-6">
         <section
           aria-label={t("sections.upcomingAssignments")}
@@ -87,6 +151,6 @@ async function StudentDashboardBody({
           </DashboardSection>
         </aside>
       </div>
-    </div>
+    </DashboardShell>
   )
 }

src/modules/dashboard/components/teacher-dashboard/teacher-dashboard-header.tsx

@@ -1,15 +0,0 @@
-import { DashboardGreetingHeader } from "../dashboard-greeting-header"
-import { TeacherQuickActions } from "./teacher-quick-actions"
-
-interface TeacherDashboardHeaderProps {
-  teacherName: string
-}
-
-export function TeacherDashboardHeader({ teacherName }: TeacherDashboardHeaderProps) {
-  return (
-    <DashboardGreetingHeader
-      userName={teacherName}
-      actions={<TeacherQuickActions />}
-    />
-  )
-}

src/modules/dashboard/components/teacher-dashboard/teacher-dashboard-view.tsx

@@ -1,17 +1,23 @@
 import { use } from "react"
+import type { ReactNode } from "react"
+import { getLocale, getTranslations } from "next-intl/server"
+import { BarChart, FileCheck, PenTool, TrendingUp } from "lucide-react"
+
+import type { ActionState } from "@/shared/types/action-state"
+import type { StatItem } from "@/shared/components/ui/stats-grid"
 import type { TeacherDashboardData } from "@/modules/dashboard/types"
 import type { TeacherDashboardMetrics } from "@/modules/dashboard/lib/dashboard-utils"
-import type { ActionState } from "@/shared/types/action-state"
-import { getTranslations } from "next-intl/server"
+import { getGreetingKey } from "@/modules/dashboard/lib/dashboard-utils"
+import { formatLongDate } from "@/shared/lib/utils"
 import type { TeacherTodoItem } from "./teacher-todo-card"
 
 import { DashboardSection } from "../dashboard-section"
+import { DashboardShell } from "../dashboard-shell"
 import { TeacherClassesCard } from "./teacher-classes-card"
-import { TeacherDashboardHeader } from "./teacher-dashboard-header"
 import { TeacherHomeworkCard } from "./teacher-homework-card"
 import { RecentSubmissions } from "./recent-submissions"
 import { TeacherSchedule } from "./teacher-schedule"
-import { TeacherStats } from "./teacher-stats"
+import { TeacherQuickActions } from "./teacher-quick-actions"
 import { TeacherGradeTrends } from "./teacher-grade-trends"
 import { TeacherTodoCard } from "./teacher-todo-card"
 
@@ -32,10 +38,22 @@ export function TeacherDashboardView({ dataPromise }: { dataPromise: Promise<Tea
   return <TeacherDashboardContent data={result.data} />
 }
 
-async function TeacherDashboardContent({ data }: { data: TeacherDashboardData & { metrics: TeacherDashboardMetrics } }) {
+async function TeacherDashboardContent({
+  data,
+}: {
+  data: TeacherDashboardData & { metrics: TeacherDashboardMetrics }
+}): Promise<ReactNode> {
   const t = await getTranslations("dashboard")
   const { metrics } = data
 
+  const locale = await getLocale()
+  const today = formatLongDate(new Date(), locale)
+  const greetingKey = getGreetingKey(new Date())
+  const title = data.teacherName
+    ? `${t(`greeting.${greetingKey}`)}，${data.teacherName}`
+    : t(`greeting.${greetingKey}`)
+  const description = t("greeting.todayIs", { date: today })
+
   // 待办聚合（使用预计算指标）
   const todoItems: TeacherTodoItem[] = [
     {
@@ -58,21 +76,53 @@ async function TeacherDashboardContent({ data }: { data: TeacherDashboardData &
     },
   ]
 
+  const stats: StatItem[] = [
+    {
+      label: t("stats.needsGrading"),
+      value: String(metrics.toGradeCount),
+      description: t("stats.submissionsPendingReview"),
+      icon: FileCheck,
+      href: "/teacher/homework/submissions?status=submitted",
+      highlight: metrics.toGradeCount > 0,
+      color: "text-amber-500",
+      valueClassName: "tabular-nums",
+    },
+    {
+      label: t("stats.activeAssignments"),
+      value: String(metrics.activeAssignmentsCount),
+      description: t("stats.publishedAndOngoing"),
+      icon: PenTool,
+      href: "/teacher/homework/assignments?status=published",
+      color: "text-blue-500",
+      valueClassName: "tabular-nums",
+    },
+    {
+      label: t("stats.averageScore"),
+      value: `${Math.round(metrics.averageScore)}%`,
+      description: t("stats.acrossRecentAssignments"),
+      icon: TrendingUp,
+      href: "#grade-trends",
+      color: "text-emerald-500",
+      valueClassName: "tabular-nums",
+    },
+    {
+      label: t("stats.submissionRate"),
+      value: `${Math.round(metrics.submissionRate)}%`,
+      description: t("stats.overallCompletionRate"),
+      icon: BarChart,
+      href: "#grade-trends",
+      color: "text-purple-500",
+      valueClassName: "tabular-nums",
+    },
+  ]
+
   return (
-    <div className="flex h-full flex-col space-y-6 p-8">
-      <header>
-        <TeacherDashboardHeader teacherName={data.teacherName} />
-      </header>
-
-      <DashboardSection variant="stats" ariaLabel={t("sections.quickStats")}>
-        <TeacherStats
-          toGradeCount={metrics.toGradeCount}
-          activeAssignmentsCount={metrics.activeAssignmentsCount}
-          averageScore={metrics.averageScore}
-          submissionRate={metrics.submissionRate}
-        />
-      </DashboardSection>
-
+    <DashboardShell
+      title={title}
+      description={description}
+      stats={stats}
+      actions={<TeacherQuickActions />}
+    >
       <div className="flex flex-col gap-6 lg:grid lg:grid-cols-12">
         {/* 课表：移动端首位，桌面端右上 — 仅渲染一次（P2-9 修复，原为双实例） */}
         <div className="order-1 lg:col-start-9 lg:col-span-4 lg:row-start-1">
@@ -81,7 +131,10 @@ async function TeacherDashboardContent({ data }: { data: TeacherDashboardData &
           </DashboardSection>
         </div>
 
-        <section aria-label={t("sections.pendingGrading")} className="flex flex-col gap-6 order-2 lg:col-start-1 lg:col-span-8 lg:row-start-1 lg:row-span-2">
+        <section
+          aria-label={t("sections.pendingGrading")}
+          className="flex flex-col gap-6 order-2 lg:col-start-1 lg:col-span-8 lg:row-start-1 lg:row-span-2"
+        >
           <DashboardSection variant="card" ariaLabel={t("todo.title")}>
             <TeacherTodoCard items={todoItems} />
           </DashboardSection>
@@ -98,7 +151,10 @@ async function TeacherDashboardContent({ data }: { data: TeacherDashboardData &
           </DashboardSection>
         </section>
 
-        <aside aria-label={t("sections.myClasses")} className="flex flex-col gap-6 order-3 lg:col-start-9 lg:col-span-4 lg:row-start-2">
+        <aside
+          aria-label={t("sections.myClasses")}
+          className="flex flex-col gap-6 order-3 lg:col-start-9 lg:col-span-4 lg:row-start-2"
+        >
           <DashboardSection variant="list" ariaLabel={t("sections.homework")}>
             <TeacherHomeworkCard assignments={data.assignments} />
           </DashboardSection>
@@ -107,6 +163,6 @@ async function TeacherDashboardContent({ data }: { data: TeacherDashboardData &
           </DashboardSection>
         </aside>
       </div>
-    </div>
+    </DashboardShell>
   )
 }

src/modules/dashboard/components/teacher-dashboard/teacher-stats.tsx

@@ -1,61 +0,0 @@
-import { FileCheck, PenTool, TrendingUp, BarChart } from "lucide-react"
-import { getTranslations } from "next-intl/server"
-import { StatCard } from "@/shared/components/ui/stat-card"
-
-interface TeacherStatsProps {
-  toGradeCount: number
-  activeAssignmentsCount: number
-  averageScore: number
-  submissionRate: number
-}
-
-export async function TeacherStats({
-  toGradeCount,
-  activeAssignmentsCount,
-  averageScore,
-  submissionRate,
-}: TeacherStatsProps) {
-  const t = await getTranslations("dashboard")
-
-  return (
-    <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-4">
-      <StatCard
-        title={t("stats.needsGrading")}
-        value={String(toGradeCount)}
-        description={t("stats.submissionsPendingReview")}
-        icon={FileCheck}
-        href="/teacher/homework/submissions?status=submitted"
-        highlight={toGradeCount > 0}
-        color="text-amber-500"
-        valueClassName="tabular-nums"
-      />
-      <StatCard
-        title={t("stats.activeAssignments")}
-        value={String(activeAssignmentsCount)}
-        description={t("stats.publishedAndOngoing")}
-        icon={PenTool}
-        href="/teacher/homework/assignments?status=published"
-        color="text-blue-500"
-        valueClassName="tabular-nums"
-      />
-      <StatCard
-        title={t("stats.averageScore")}
-        value={`${Math.round(averageScore)}%`}
-        description={t("stats.acrossRecentAssignments")}
-        icon={TrendingUp}
-        href="#grade-trends"
-        color="text-emerald-500"
-        valueClassName="tabular-nums"
-      />
-      <StatCard
-        title={t("stats.submissionRate")}
-        value={`${Math.round(submissionRate)}%`}
-        description={t("stats.overallCompletionRate")}
-        icon={BarChart}
-        href="#grade-trends"
-        color="text-purple-500"
-        valueClassName="tabular-nums"
-      />
-    </div>
-  )
-}

src/modules/lesson-preparation/components/blocks/blackboard-block.tsx

@@ -6,7 +6,7 @@ import { Tag, Eye, Pencil } from "lucide-react";
 import type { BlackboardBlockData } from "../../types";
 import { isBlackboardLayout } from "../../lib/type-guards";
 import { KnowledgePointPicker } from "../knowledge-point-picker";
-import { LessonPlanErrorBoundary } from "../lesson-plan-error-boundary";
+import { SectionErrorBoundary } from "@/shared/components/section-error-boundary";
 
 interface Props {
   data: BlackboardBlockData;
@@ -125,7 +125,7 @@ export function BlackboardBlock({ data, textbookId, chapterId, onUpdate }: Props
         </button>
       </div>
       {showKpPicker && (
-        <LessonPlanErrorBoundary>
+        <SectionErrorBoundary namespace="lessonPreparation">
           <KnowledgePointPicker
             textbookId={textbookId}
             chapterId={chapterId}
@@ -133,7 +133,7 @@ export function BlackboardBlock({ data, textbookId, chapterId, onUpdate }: Props
             onChange={(ids) => onUpdate({ ...data, knowledgePointIds: ids })}
             onClose={() => setShowKpPicker(false)}
           />
-        </LessonPlanErrorBoundary>
+        </SectionErrorBoundary>
       )}
     </div>
   );

src/modules/lesson-preparation/components/blocks/exercise-block.tsx

@@ -8,7 +8,7 @@ import { useLessonPlanEditor } from "../../hooks/use-lesson-plan-editor";
 import { QuestionBankPicker } from "../question-bank-picker";
 import { InlineQuestionEditor } from "../inline-question-editor";
 import { PublishHomeworkDialog } from "../publish-homework-dialog";
-import { LessonPlanErrorBoundary } from "../lesson-plan-error-boundary";
+import { SectionErrorBoundary } from "@/shared/components/section-error-boundary";
 import { Button } from "@/shared/components/ui/button";
 import { Plus, Trash2 } from "lucide-react";
 import type {
@@ -145,16 +145,16 @@ export function ExerciseBlock({ blockId, data, classes, textbookId, chapterId }:
         )}
       </div>
       {showBank && (
-        <LessonPlanErrorBoundary>
+        <SectionErrorBoundary namespace="lessonPreparation">
           <QuestionBankPicker
             existingIds={data.items.map((i) => i.questionId)}
             onPick={addItems}
             onClose={() => setShowBank(false)}
           />
-        </LessonPlanErrorBoundary>
+        </SectionErrorBoundary>
       )}
       {showInline && (
-        <LessonPlanErrorBoundary>
+        <SectionErrorBoundary namespace="lessonPreparation">
           <InlineQuestionEditor
             textbookId={textbookId}
             chapterId={chapterId}
@@ -164,10 +164,10 @@ export function ExerciseBlock({ blockId, data, classes, textbookId, chapterId }:
             }}
             onClose={() => setShowInline(false)}
           />
-        </LessonPlanErrorBoundary>
+        </SectionErrorBoundary>
       )}
       {showPublish && (
-        <LessonPlanErrorBoundary>
+        <SectionErrorBoundary namespace="lessonPreparation">
           <PublishHomeworkDialog
             planId={planId}
             blockId={blockId}
@@ -176,7 +176,7 @@ export function ExerciseBlock({ blockId, data, classes, textbookId, chapterId }:
             onClose={() => setShowPublish(false)}
             onPublished={() => router.refresh()}
           />
-        </LessonPlanErrorBoundary>
+        </SectionErrorBoundary>
       )}
     </div>
   );

src/modules/lesson-preparation/components/blocks/new-teaching-block.tsx

@@ -6,7 +6,7 @@ import { Plus, Trash2, Tag } from "lucide-react";
 import type { NewTeachingBlockData, NewTeachingPoint } from "../../types";
 import { Button } from "@/shared/components/ui/button";
 import { KnowledgePointPicker } from "../knowledge-point-picker";
-import { LessonPlanErrorBoundary } from "../lesson-plan-error-boundary";
+import { SectionErrorBoundary } from "@/shared/components/section-error-boundary";
 
 interface Props {
   data: NewTeachingBlockData;
@@ -108,7 +108,7 @@ export function NewTeachingBlock({ data, textbookId, chapterId, onUpdate }: Prop
         {t("newTeaching.addPoint")}
       </Button>
       {pickerFor !== null && (
-        <LessonPlanErrorBoundary>
+        <SectionErrorBoundary namespace="lessonPreparation">
           <KnowledgePointPicker
             textbookId={textbookId}
             chapterId={chapterId}
@@ -116,7 +116,7 @@ export function NewTeachingBlock({ data, textbookId, chapterId, onUpdate }: Prop
             onChange={(ids) => updatePoint(pickerFor, { knowledgePointIds: ids })}
             onClose={() => setPickerFor(null)}
           />
-        </LessonPlanErrorBoundary>
+        </SectionErrorBoundary>
       )}
     </div>
   );

src/modules/lesson-preparation/components/blocks/rich-text-block-inner.tsx

@@ -9,7 +9,7 @@ import { useTranslations } from "next-intl";
 import type { RichTextBlockData, RichTextAttachment } from "../../types";
 import { KnowledgePointPicker } from "../knowledge-point-picker";
 import { AttachmentPicker } from "../attachment-picker";
-import { LessonPlanErrorBoundary } from "../lesson-plan-error-boundary";
+import { SectionErrorBoundary } from "@/shared/components/section-error-boundary";
 import { Tag, Paperclip, Trash2 } from "lucide-react";
 
 export interface RichTextBlockProps {
@@ -187,7 +187,7 @@ export function RichTextBlockInner({
       )}
 
       {showKpPicker && (
-        <LessonPlanErrorBoundary>
+        <SectionErrorBoundary namespace="lessonPreparation">
           <KnowledgePointPicker
             textbookId={textbookId}
             chapterId={chapterId}
@@ -195,11 +195,11 @@ export function RichTextBlockInner({
             onChange={(ids) => onUpdate({ ...data, knowledgePointIds: ids })}
             onClose={() => setShowKpPicker(false)}
           />
-        </LessonPlanErrorBoundary>
+        </SectionErrorBoundary>
       )}
       {/* V5-5：素材库 picker */}
       {showAttachmentPicker && planId && (
-        <LessonPlanErrorBoundary>
+        <SectionErrorBoundary namespace="lessonPreparation">
           <AttachmentPicker
             planId={planId}
             blockId={blockId}
@@ -207,7 +207,7 @@ export function RichTextBlockInner({
             onSelect={handleSelectAttachment}
             onClose={() => setShowAttachmentPicker(false)}
           />
-        </LessonPlanErrorBoundary>
+        </SectionErrorBoundary>
       )}
     </div>
   );

src/modules/lesson-preparation/components/blocks/rich-text-block.tsx

@@ -9,7 +9,7 @@ import { useTranslations } from "next-intl";
 import type { RichTextBlockData, RichTextAttachment } from "../../types";
 import { KnowledgePointPicker } from "../knowledge-point-picker";
 import { AttachmentPicker } from "../attachment-picker";
-import { LessonPlanErrorBoundary } from "../lesson-plan-error-boundary";
+import { SectionErrorBoundary } from "@/shared/components/section-error-boundary";
 import { Tag, Paperclip, Trash2 } from "lucide-react";
 
 interface Props {
@@ -187,7 +187,7 @@ export function RichTextBlock({
       )}
 
       {showKpPicker && (
-        <LessonPlanErrorBoundary>
+        <SectionErrorBoundary namespace="lessonPreparation">
           <KnowledgePointPicker
             textbookId={textbookId}
             chapterId={chapterId}
@@ -195,11 +195,11 @@ export function RichTextBlock({
             onChange={(ids) => onUpdate({ ...data, knowledgePointIds: ids })}
             onClose={() => setShowKpPicker(false)}
           />
-        </LessonPlanErrorBoundary>
+        </SectionErrorBoundary>
       )}
       {/* V5-5：素材库 picker */}
       {showAttachmentPicker && planId && (
-        <LessonPlanErrorBoundary>
+        <SectionErrorBoundary namespace="lessonPreparation">
           <AttachmentPicker
             planId={planId}
             blockId={blockId}
@@ -207,7 +207,7 @@ export function RichTextBlock({
             onSelect={handleSelectAttachment}
             onClose={() => setShowAttachmentPicker(false)}
           />
-        </LessonPlanErrorBoundary>
+        </SectionErrorBoundary>
       )}
     </div>
   );

src/modules/lesson-preparation/components/inline-question-editor.tsx

@@ -8,7 +8,7 @@ import { Button } from "@/shared/components/ui/button";
 import { FocusTrap } from "@/shared/components/a11y/focus-trap";
 import { X, Tag } from "lucide-react";
 import { KnowledgePointPicker } from "./knowledge-point-picker";
-import { LessonPlanErrorBoundary } from "./lesson-plan-error-boundary";
+import { SectionErrorBoundary } from "@/shared/components/section-error-boundary";
 import type { ExerciseItem, InlineQuestionContent } from "../types";
 import { VALID_QUESTION_TYPES } from "../lib/type-guards";
 
@@ -236,7 +236,7 @@ export function InlineQuestionEditor({ onAdd, onClose, textbookId, chapterId }:
         </FocusTrap>
       </div>
       {showKpPicker && (
-        <LessonPlanErrorBoundary>
+        <SectionErrorBoundary namespace="lessonPreparation">
           <KnowledgePointPicker
             textbookId={textbookId}
             chapterId={chapterId}
@@ -244,7 +244,7 @@ export function InlineQuestionEditor({ onAdd, onClose, textbookId, chapterId }:
             onChange={setKpIds}
             onClose={() => setShowKpPicker(false)}
           />
-        </LessonPlanErrorBoundary>
+        </SectionErrorBoundary>
       )}
     </div>
   );

src/modules/lesson-preparation/components/knowledge-point-picker.tsx

@@ -4,7 +4,7 @@ import { useEffect, useState } from "react";
 import { useTranslations } from "next-intl";
 import { Button } from "@/shared/components/ui/button";
 import { FocusTrap } from "@/shared/components/a11y/focus-trap";
-import { KnowledgePointSkeleton } from "./lesson-plan-skeleton";
+import { SkeletonCard } from "@/shared/components/ui/skeleton";
 import { X } from "lucide-react";
 import { useLessonPlanContextSafe } from "../providers/lesson-plan-provider";
 import type { KnowledgePointOption } from "../providers/lesson-plan-provider";
@@ -92,7 +92,7 @@ export function KnowledgePointPicker({
         </div>
         <div className="flex-1 overflow-y-auto p-4">
           {loading ? (
-            <KnowledgePointSkeleton />
+            <SkeletonCard variant="list" rows={8} />
           ) : error ? (
             <p className="text-error text-sm">{error}</p>
           ) : options.length === 0 ? (

src/modules/lesson-preparation/components/lesson-plan-dialogs.tsx

@@ -0,0 +1,124 @@
+"use client";
+
+import type { JSX } from "react";
+import { SectionErrorBoundary } from "@/shared/components/section-error-boundary";
+import { VersionHistoryDrawer } from "./version-history-drawer";
+import { PrintView } from "./print-view";
+import { ScheduleDialog } from "./schedule-dialog";
+import { ConsistencyCheckDialog } from "./consistency-check-dialog";
+import { AiFeedbackDialog } from "./ai-feedback-dialog";
+import { AiDifferentiationDialog } from "./ai-differentiation-dialog";
+import type { LessonPlan, LessonPlanDocument } from "../types";
+
+interface ClassItem {
+  id: string;
+  name: string;
+}
+
+interface Props {
+  planId: string;
+  doc: LessonPlanDocument;
+  printablePlan: LessonPlan;
+  textbookId?: string;
+  textbookTitle?: string;
+  chapterTitle?: string;
+  classes?: ClassItem[];
+  showVersions: boolean;
+  onCloseVersions: () => void;
+  onReverted: () => void;
+  showPrint: boolean;
+  onClosePrint: () => void;
+  showSchedule: boolean;
+  onCloseSchedule: () => void;
+  showConsistency: boolean;
+  onCloseConsistency: () => void;
+  showAiFeedback: boolean;
+  onCloseAiFeedback: () => void;
+  showAiDifferentiation: boolean;
+  onCloseAiDifferentiation: () => void;
+}
+
+export function LessonPlanDialogs({
+  planId,
+  doc,
+  printablePlan,
+  textbookId,
+  textbookTitle,
+  chapterTitle,
+  classes,
+  showVersions,
+  onCloseVersions,
+  onReverted,
+  showPrint,
+  onClosePrint,
+  showSchedule,
+  onCloseSchedule,
+  showConsistency,
+  onCloseConsistency,
+  showAiFeedback,
+  onCloseAiFeedback,
+  showAiDifferentiation,
+  onCloseAiDifferentiation,
+}: Props): JSX.Element {
+  return (
+    <>
+      <SectionErrorBoundary namespace="lessonPreparation">
+        <VersionHistoryDrawer
+          open={showVersions}
+          onClose={onCloseVersions}
+          planId={planId}
+          onReverted={onReverted}
+          currentDoc={doc}
+        />
+      </SectionErrorBoundary>
+
+      {/* V5-4：导出/打印视图 */}
+      {showPrint && (
+        <SectionErrorBoundary namespace="lessonPreparation">
+          <PrintView
+            plan={printablePlan}
+            textbookTitle={textbookTitle}
+            chapterTitle={chapterTitle}
+            onClose={onClosePrint}
+          />
+        </SectionErrorBoundary>
+      )}
+
+      {/* V5-7：安排课时对话框 */}
+      {showSchedule && classes && classes.length > 0 && (
+        <SectionErrorBoundary namespace="lessonPreparation">
+          <ScheduleDialog
+            planId={planId}
+            classes={classes}
+            onClose={onCloseSchedule}
+          />
+        </SectionErrorBoundary>
+      )}
+
+      {/* V5-19 T3：一致性校验对话框 */}
+      {showConsistency && (
+        <SectionErrorBoundary namespace="lessonPreparation">
+          <ConsistencyCheckDialog doc={doc} onClose={onCloseConsistency} />
+        </SectionErrorBoundary>
+      )}
+
+      {/* V5-17 A1/A2：AI 反馈对话框 */}
+      {showAiFeedback && (
+        <SectionErrorBoundary namespace="lessonPreparation">
+          <AiFeedbackDialog doc={doc} onClose={onCloseAiFeedback} />
+        </SectionErrorBoundary>
+      )}
+
+      {/* V5-21 A3/A4/A5：AI 差异化与课标核对对话框 */}
+      {showAiDifferentiation && (
+        <SectionErrorBoundary namespace="lessonPreparation">
+          <AiDifferentiationDialog
+            doc={doc}
+            textbookId={textbookId}
+            onClose={onCloseAiDifferentiation}
+          />
+        </SectionErrorBoundary>
+      )}
+    </>
+  );
+}

src/modules/lesson-preparation/components/lesson-plan-editor.tsx

@@ -1,44 +1,28 @@
 "use client";
 
 import { useCallback, useEffect, useMemo, useRef, useState } from "react";
+import type { JSX } from "react";
 import { useTranslations } from "next-intl";
+import { toast } from "sonner";
 import { useLessonPlanEditor } from "../hooks/use-lesson-plan-editor";
+import { useLessonPlanPersistence } from "../hooks/use-lesson-plan-persistence";
 import { StructureTree } from "./structure-tree/structure-tree";
 import { PaperEditor } from "./paper-editor/paper-editor";
 import { DetailPanel } from "./detail-panel/detail-panel";
 import { AnchorMigrationBanner } from "./anchor-migration-banner";
-import { VersionHistoryDrawer } from "./version-history-drawer";
-import { LessonPlanErrorBoundary } from "./lesson-plan-error-boundary";
+import { LessonPlanToolbar } from "./lesson-plan-toolbar";
+import { LessonPlanDialogs } from "./lesson-plan-dialogs";
+import { SectionErrorBoundary } from "@/shared/components/section-error-boundary";
 import {
   useLessonPlanContextSafe,
   useLessonPlanTrackerSafe,
 } from "../providers/lesson-plan-provider";
-import type { LessonPlanStatus } from "../types";
-import { Button } from "@/shared/components/ui/button";
-import {
-  AlertDialog,
-  AlertDialogAction,
-  AlertDialogCancel,
-  AlertDialogContent,
-  AlertDialogDescription,
-  AlertDialogFooter,
-  AlertDialogHeader,
-  AlertDialogTitle,
-  AlertDialogTrigger,
-} from "@/shared/components/ui/alert-dialog";
-import { Save, History, Book, FileText, Send, Undo2, RotateCw, WifiOff, Printer, Undo, Redo, CalendarClock, ClipboardCheck, Sparkles, Layers } from "lucide-react";
-import { toast } from "sonner";
-import { PrintView } from "./print-view";
-import { ScheduleDialog } from "./schedule-dialog";
-import { ConsistencyCheckDialog } from "./consistency-check-dialog";
-import { AiFeedbackDialog } from "./ai-feedback-dialog";
-import { AiDifferentiationDialog } from "./ai-differentiation-dialog";
-import type { LessonPlan } from "../types";
+import type { LessonPlan, LessonPlanDocument, LessonPlanStatus } from "../types";
 
 interface Props {
   planId: string;
   initialTitle: string;
-  initialDoc: import("../types").LessonPlanDocument;
+  initialDoc: LessonPlanDocument;
   initialStatus?: LessonPlanStatus;
   textbookId?: string;
   chapterId?: string;
@@ -57,9 +41,9 @@ export function LessonPlanEditor({
   textbookTitle,
   chapterTitle,
   classes,
-}: Props) {
+}: Props): JSX.Element {
   const t = useTranslations("lessonPreparation");
-  // Phase 4.2: 拆分为细粒度 selector，避免任一字段变化都触发整体 re-render
+  // Phase 4.2：拆分为细粒度 selector，避免任一字段变化都触发整体 re-render
   const isDirty = useLessonPlanEditor((s) => s.isDirty);
   const isOnline = useLessonPlanEditor((s) => s.isOnline);
   const doc = useLessonPlanEditor((s) => s.doc);
@@ -68,26 +52,28 @@ export function LessonPlanEditor({
   const saveError = useLessonPlanEditor((s) => s.saveError);
   const lastSavedAt = useLessonPlanEditor((s) => s.lastSavedAt);
   const setTitle = useLessonPlanEditor((s) => s.setTitle);
-  // 订阅派生 boolean，仅在结果变化时触发 re-render（rerender-derived-state）
+  // 订阅派生 boolean，仅在结果变化时触发 re-render
   const canUndo = useLessonPlanEditor((s) => s.canUndo());
   const canRedo = useLessonPlanEditor((s) => s.canRedo());
   const tracker = useLessonPlanTrackerSafe();
   const ctx = useLessonPlanContextSafe();
   const service = ctx?.service ?? null;
   const [showVersions, setShowVersions] = useState(false);
-  const [showPrint, setShowPrint] = useState(false); // V5-4：打印视图
-  const [showSchedule, setShowSchedule] = useState(false); // V5-7：安排课时对话框
-  const [showConsistency, setShowConsistency] = useState(false); // V5-19：一致性校验对话框
-  const [showAiFeedback, setShowAiFeedback] = useState(false); // V5-17：AI 反馈对话框
-  const [showAiDifferentiation, setShowAiDifferentiation] = useState(false); // V5-21：AI 差异化对话框
+  const [showPrint, setShowPrint] = useState(false);
+  const [showSchedule, setShowSchedule] = useState(false);
+  const [showConsistency, setShowConsistency] = useState(false);
+  const [showAiFeedback, setShowAiFeedback] = useState(false);
+  const [showAiDifferentiation, setShowAiDifferentiation] = useState(false);
   const [planStatus, setPlanStatus] = useState<LessonPlanStatus>(initialStatus);
   const [publishing, setPublishing] = useState(false);
-  const autoSaveTimer = useRef<ReturnType<typeof setTimeout> | null>(null);
-  const versionTimer = useRef<ReturnType<typeof setInterval> | null>(null);
+
+  const { handleRetrySave, handleManualSave, handleReverted } = useLessonPlanPersistence({
+    planId,
+    service,
+    tracker,
+  });
 
   // 初始化：仅在 planId 变化时 hydrate（修复 P1-3）
-  // hydrate 是 zustand store action，引用稳定
-  // initialTitle/initialDoc 通过 ref 保存，避免作为 effect 依赖导致重复 hydrate
   const hydrate = useLessonPlanEditor((s) => s.hydrate);
   const initialRef = useRef({ initialTitle, initialDoc });
   useEffect(() => {
@@ -95,44 +81,6 @@ export function LessonPlanEditor({
     hydrate(planId, t0, d0);
   }, [planId, hydrate]);
 
-  // 自动保存（debounce 3s）- 用 getState() 获取最新值（修复 P1-4）
-  // V3 修复：完全通过 service 调用，不直接 import actions
-  // V5-1 修复：保存失败显示 toast + 设置 saveError；断网时不触发保存
-  useEffect(() => {
-    if (!isDirty) return;
-    if (!service) return;
-    if (!isOnline) return; // V5-1：断网期间不触发保存请求
-    if (autoSaveTimer.current) clearTimeout(autoSaveTimer.current);
-    autoSaveTimer.current = setTimeout(async () => {
-      const state = useLessonPlanEditor.getState();
-      state.setSaving(true);
-      try {
-        const res = await service.updateLessonPlan({
-          planId: state.planId,
-          title: state.title,
-          content: state.doc,
-        });
-        if (res.success) {
-          // V5-1：从失败恢复到成功时提示
-          if (state.saveError) toast.success(t("status.recovered"));
-          state.markSaved();
-        } else {
-          state.setSaveError(true);
-          toast.error(t("status.saveFailed"), { description: t("status.saveFailedHint") });
-        }
-      } catch (e) {
-        console.error("[LessonPlanEditor] auto-save failed", e);
-        state.setSaveError(true);
-        toast.error(t("status.saveFailed"), { description: t("status.saveFailedHint") });
-      } finally {
-        state.setSaving(false);
-      }
-    }, 3000);
-    return () => {
-      if (autoSaveTimer.current) clearTimeout(autoSaveTimer.current);
-    };
-  }, [isDirty, doc, planId, service, isOnline, t]);
-
   // V5-1：监听网络在线/离线状态
   useEffect(() => {
     function handleOnline() {
@@ -151,31 +99,6 @@ export function LessonPlanEditor({
     };
   }, [t]);
 
-  // V5-1：手动重试保存（saveError 时显示按钮）
-  const handleRetrySave = useCallback(async () => {
-    if (!service) return;
-    const state = useLessonPlanEditor.getState();
-    state.setSaving(true);
-    try {
-      const res = await service.updateLessonPlan({
-        planId: state.planId,
-        title: state.title,
-        content: state.doc,
-      });
-      if (res.success) {
-        toast.success(t("status.recovered"));
-        state.markSaved();
-      } else {
-        toast.error(t("status.saveFailed"));
-      }
-    } catch (e) {
-      console.error("[LessonPlanEditor] retry save failed", e);
-      toast.error(t("status.saveFailed"));
-    } finally {
-      state.setSaving(false);
-    }
-  }, [service, t]);
-
   // V5-2：撤销/重做快捷键（Cmd/Ctrl+Z, Cmd/Ctrl+Shift+Z 或 Cmd/Ctrl+Y）
   useEffect(() => {
     function handleKeyDown(e: KeyboardEvent) {
@@ -196,11 +119,10 @@ export function LessonPlanEditor({
     return () => window.removeEventListener("keydown", handleKeyDown);
   }, []);
 
-  // V5-2：撤销/重做按钮处理（canUndo/canRedo 已通过 selector 订阅）
   const handleUndo = useCallback(() => useLessonPlanEditor.getState().undo(), []);
   const handleRedo = useCallback(() => useLessonPlanEditor.getState().redo(), []);
 
-  // V5-4：构造打印用的 LessonPlan 对象（编辑器仅持有 planId/title/doc，其余字段填默认值）
+  // V5-4：构造打印用的 LessonPlan 对象
   const printablePlan: LessonPlan = useMemo(() => {
     return {
       id: planId,
@@ -221,27 +143,6 @@ export function LessonPlanEditor({
     };
   }, [planId, title, doc, lastSavedAt, textbookId, chapterId, planStatus]);
 
-  // 定时自动版本（30min）
-  useEffect(() => {
-    if (!service) return;
-    versionTimer.current = setInterval(async () => {
-      const state = useLessonPlanEditor.getState();
-      if (!state.isDirty) return;
-      try {
-        await service.saveLessonPlanVersion({
-          planId: state.planId,
-          content: state.doc,
-          label: t("version.autoLabel"),
-        });
-      } catch (e) {
-        console.error("[LessonPlanEditor] auto-version failed", e);
-      }
-    }, 30 * 60 * 1000);
-    return () => {
-      if (versionTimer.current) clearInterval(versionTimer.current);
-    };
-  }, [planId, t, service]);
-
   // 离开未保存提示（P3-1）
   useEffect(() => {
     function handleBeforeUnload(e: BeforeUnloadEvent) {
@@ -254,40 +155,6 @@ export function LessonPlanEditor({
     return () => window.removeEventListener("beforeunload", handleBeforeUnload);
   }, []);
 
-  const handleManualSave = useCallback(async () => {
-    if (!service) return;
-    const state = useLessonPlanEditor.getState();
-    state.setSaving(true);
-    try {
-      const res = await service.saveLessonPlanVersion({
-        planId: state.planId,
-        content: state.doc,
-      });
-      if (res.success) {
-        state.markSaved();
-        tracker.track("lesson_plan.save", { planId: state.planId, source: "manual" });
-      }
-    } catch (e) {
-      console.error("[LessonPlanEditor] manual save failed", e);
-    } finally {
-      state.setSaving(false);
-    }
-  }, [tracker, service]);
-
-  // 版本回退后刷新内容（修复 P1-1）
-  const handleReverted = useCallback(async () => {
-    if (!service) return;
-    const state = useLessonPlanEditor.getState();
-    try {
-      const res = await service.getLessonPlanById(state.planId);
-      if (res.success && res.data?.plan) {
-        state.hydrate(state.planId, res.data.plan.title, res.data.plan.content);
-      }
-    } catch (e) {
-      console.error("[LessonPlanEditor] reload after revert failed", e);
-    }
-  }, [service]);
-
   // 发布课案（P0-1 修复）
   const handlePublish = useCallback(async () => {
     if (!service) return;
@@ -332,186 +199,39 @@ export function LessonPlanEditor({
 
   return (
     <div className="flex flex-col h-full">
-      {/* 顶部工具栏 */}
-      <div className="flex items-center gap-2 px-4 py-2 border-b border-outline-variant bg-surface">
-        <input
-          value={title}
-          onChange={(e) => setTitle(e.target.value)}
-          className="flex-1 bg-transparent font-headline-md text-headline-md focus:outline-none"
+      <LessonPlanToolbar
+        title={title}
+        onTitleChange={setTitle}
+        textbookTitle={textbookTitle}
+        chapterTitle={chapterTitle}
+        isSaving={isSaving}
+        isDirty={isDirty}
+        saveError={saveError}
+        isOnline={isOnline}
+        canUndo={canUndo}
+        canRedo={canRedo}
+        onRetrySave={handleRetrySave}
+        onUndo={handleUndo}
+        onRedo={handleRedo}
+        onManualSave={handleManualSave}
+        onShowVersions={() => setShowVersions(true)}
+        onShowPrint={() => setShowPrint(true)}
+        onShowSchedule={() => setShowSchedule(true)}
+        onShowConsistency={() => setShowConsistency(true)}
+        onShowAiFeedback={() => setShowAiFeedback(true)}
+        onShowAiDifferentiation={() => setShowAiDifferentiation(true)}
+        planStatus={planStatus}
+        publishing={publishing}
+        onPublish={handlePublish}
+        onUnpublish={handleUnpublish}
+        showScheduleButton={!!classes && classes.length > 0}
       />
-        {/* 教材/章节指示器 */}
-        {textbookTitle && (
-          <div className="flex items-center gap-1 text-xs text-on-surface-variant px-2 py-1 rounded bg-surface-container-high">
-            <Book className="w-3 h-3" />
-            {/* arbitrary-value: layout fixed size */}
-            <span className="max-w-[120px] truncate">{textbookTitle}</span>
-            {chapterTitle && (
-              <>
-                <span className="text-on-surface-variant/50">/</span>
-                <FileText className="w-3 h-3" />
-                {/* arbitrary-value: layout fixed size */}
-                <span className="max-w-[120px] truncate">{chapterTitle}</span>
-              </>
-            )}
-          </div>
-        )}
-        <span className="text-on-surface-variant text-sm">
-          {isSaving
-            ? t("status.saving")
-            : isDirty
-              ? t("status.unsaved")
-              : t("status.saved")}
-        </span>
-        {/* V5-1：保存失败/离线提示与重试按钮 */}
-        {saveError && (
-          <Button
-            variant="outline"
-            size="sm"
-            onClick={handleRetrySave}
-            disabled={isSaving}
-            className="text-error border-error"
-          >
-            <RotateCw className="w-3 h-3 mr-1" />
-            {t("status.retrySave")}
-          </Button>
-        )}
-        {!isOnline && (
-          <span className="text-xs text-error inline-flex items-center gap-1">
-            <WifiOff className="w-3 h-3" />
-            {t("status.offlineBadge")}
-          </span>
-        )}
-        <Button
-          variant="outline"
-          size="sm"
-          onClick={() => setShowVersions(true)}
-        >
-          <History className="w-4 h-4 mr-1" /> {t("action.versions")}
-        </Button>
-        {/* V5-2：撤销/重做按钮 */}
-        <Button
-          variant="outline"
-          size="sm"
-          onClick={handleUndo}
-          disabled={!canUndo}
-          aria-label={t("action.undo")}
-          title={t("action.undoShortcut")}
-        >
-          <Undo className="w-4 h-4" />
-        </Button>
-        <Button
-          variant="outline"
-          size="sm"
-          onClick={handleRedo}
-          disabled={!canRedo}
-          aria-label={t("action.redo")}
-          title={t("action.redoShortcut")}
-        >
-          <Redo className="w-4 h-4" />
-        </Button>
-        <Button size="sm" onClick={handleManualSave} disabled={isSaving}>
-          <Save className="w-4 h-4 mr-1" /> {t("action.saveVersion")}
-        </Button>
-        {/* V5-4：导出/打印按钮 */}
-        <Button
-          variant="outline"
-          size="sm"
-          onClick={() => setShowPrint(true)}
-          aria-label={t("export.title")}
-        >
-          <Printer className="w-4 h-4 mr-1" /> {t("export.button")}
-        </Button>
-        {/* V5-7：安排课时按钮 */}
-        {classes && classes.length > 0 && (
-          <Button
-            variant="outline"
-            size="sm"
-            onClick={() => setShowSchedule(true)}
-            aria-label={t("action.scheduleLesson")}
-          >
-            <CalendarClock className="w-4 h-4 mr-1" /> {t("action.scheduleLesson")}
-          </Button>
-        )}
-        {/* V5-19 T3：一致性校验按钮 */}
-        <Button
-          variant="outline"
-          size="sm"
-          onClick={() => setShowConsistency(true)}
-          aria-label={t("editor.consistencyOpen")}
-        >
-          <ClipboardCheck className="w-4 h-4 mr-1" /> {t("editor.consistencyOpen")}
-        </Button>
-        {/* V5-17 A1/A2：AI 反馈按钮 */}
-        <Button
-          variant="outline"
-          size="sm"
-          onClick={() => setShowAiFeedback(true)}
-          aria-label={t("feedback.open")}
-        >
-          <Sparkles className="w-4 h-4 mr-1" /> {t("feedback.open")}
-        </Button>
-        {/* V5-21 A3/A4/A5：AI 差异化与课标核对按钮 */}
-        <Button
-          variant="outline"
-          size="sm"
-          onClick={() => setShowAiDifferentiation(true)}
-          aria-label={t("aiDifferentiation.open")}
-        >
-          <Layers className="w-4 h-4 mr-1" /> {t("aiDifferentiation.open")}
-        </Button>
-        {/* 发布/撤回发布按钮（P0-1 修复）*/}
-        {planStatus === "published" ? (
-          <AlertDialog>
-            <AlertDialogTrigger asChild>
-              <Button variant="outline" size="sm" disabled={publishing}>
-                <Undo2 className="w-4 h-4 mr-1" /> {t("action.unpublishPlan")}
-              </Button>
-            </AlertDialogTrigger>
-            <AlertDialogContent>
-              <AlertDialogHeader>
-                <AlertDialogTitle>{t("action.unpublishPlan")}</AlertDialogTitle>
-                <AlertDialogDescription>
-                  {t("action.unpublishPlanConfirm")}
-                </AlertDialogDescription>
-              </AlertDialogHeader>
-              <AlertDialogFooter>
-                <AlertDialogCancel>{t("action.cancel")}</AlertDialogCancel>
-                <AlertDialogAction onClick={handleUnpublish}>
-                  {t("action.confirm")}
-                </AlertDialogAction>
-              </AlertDialogFooter>
-            </AlertDialogContent>
-          </AlertDialog>
-        ) : (
-          <AlertDialog>
-            <AlertDialogTrigger asChild>
-              <Button size="sm" disabled={publishing}>
-                <Send className="w-4 h-4 mr-1" /> {t("action.publishPlan")}
-              </Button>
-            </AlertDialogTrigger>
-            <AlertDialogContent>
-              <AlertDialogHeader>
-                <AlertDialogTitle>{t("action.publishPlan")}</AlertDialogTitle>
-                <AlertDialogDescription>
-                  {t("action.publishPlanConfirm")}
-                </AlertDialogDescription>
-              </AlertDialogHeader>
-              <AlertDialogFooter>
-                <AlertDialogCancel>{t("action.cancel")}</AlertDialogCancel>
-                <AlertDialogAction onClick={handlePublish}>
-                  {t("action.confirm")}
-                </AlertDialogAction>
-              </AlertDialogFooter>
-            </AlertDialogContent>
-          </AlertDialog>
-        )}
-      </div>
 
       {/* V4：v3 锚点失效提示 banner */}
       <AnchorMigrationBanner />
 
       {/* V4：三栏布局（结构树 + 纸区 + 详情面板） */}
-      <LessonPlanErrorBoundary>
+      <SectionErrorBoundary namespace="lessonPreparation">
         <main
           style={{
             display: "grid",
@@ -524,71 +244,30 @@ export function LessonPlanEditor({
           <PaperEditor />
           <DetailPanel />
         </main>
-      </LessonPlanErrorBoundary>
+      </SectionErrorBoundary>
 
-      <LessonPlanErrorBoundary>
-        <VersionHistoryDrawer
-          open={showVersions}
-          onClose={() => setShowVersions(false)}
+      <LessonPlanDialogs
         planId={planId}
-          onReverted={handleReverted}
-          currentDoc={doc}
-        />
-      </LessonPlanErrorBoundary>
-
-      {/* V5-4：导出/打印视图 */}
-      {showPrint && (
-        <LessonPlanErrorBoundary>
-          <PrintView
-            plan={printablePlan}
+        doc={doc}
+        printablePlan={printablePlan}
+        textbookId={textbookId}
         textbookTitle={textbookTitle}
         chapterTitle={chapterTitle}
-            onClose={() => setShowPrint(false)}
-          />
-        </LessonPlanErrorBoundary>
-      )}
-
-      {/* V5-7：安排课时对话框 */}
-      {showSchedule && classes && classes.length > 0 && (
-        <LessonPlanErrorBoundary>
-          <ScheduleDialog
-            planId={planId}
         classes={classes}
-            onClose={() => setShowSchedule(false)}
+        showVersions={showVersions}
+        onCloseVersions={() => setShowVersions(false)}
+        onReverted={handleReverted}
+        showPrint={showPrint}
+        onClosePrint={() => setShowPrint(false)}
+        showSchedule={showSchedule}
+        onCloseSchedule={() => setShowSchedule(false)}
+        showConsistency={showConsistency}
+        onCloseConsistency={() => setShowConsistency(false)}
+        showAiFeedback={showAiFeedback}
+        onCloseAiFeedback={() => setShowAiFeedback(false)}
+        showAiDifferentiation={showAiDifferentiation}
+        onCloseAiDifferentiation={() => setShowAiDifferentiation(false)}
       />
-        </LessonPlanErrorBoundary>
-      )}
-
-      {/* V5-19 T3：一致性校验对话框 */}
-      {showConsistency && (
-        <LessonPlanErrorBoundary>
-          <ConsistencyCheckDialog
-            doc={doc}
-            onClose={() => setShowConsistency(false)}
-          />
-        </LessonPlanErrorBoundary>
-      )}
-
-      {/* V5-17 A1/A2：AI 反馈对话框 */}
-      {showAiFeedback && (
-        <LessonPlanErrorBoundary>
-          <AiFeedbackDialog
-            doc={doc}
-            onClose={() => setShowAiFeedback(false)}
-          />
-        </LessonPlanErrorBoundary>
-      )}
-
-      {/* V5-21 A3/A4/A5：AI 差异化与课标核对对话框 */}
-      {showAiDifferentiation && (
-        <LessonPlanErrorBoundary>
-          <AiDifferentiationDialog
-            doc={doc}
-            textbookId={textbookId}
-            onClose={() => setShowAiDifferentiation(false)}
-          />
-        </LessonPlanErrorBoundary>
-      )}
     </div>
   );
 }

src/modules/lesson-preparation/components/lesson-plan-error-boundary.tsx

@@ -1,81 +0,0 @@
-"use client";
-
-import { Component, type ReactNode, type ErrorInfo } from "react";
-import { useTranslations } from "next-intl";
-import { Button } from "@/shared/components/ui/button";
-
-interface Props {
-  children: ReactNode;
-  fallback?: ReactNode;
-  /** 错误时的回调，用于上报埋点 */
-  onError?: (error: Error, info: ErrorInfo) => void;
-  /** 错误提示文案（V3 i18n：由包装组件注入）*/
-  errorText?: string;
-  /** 重试按钮文案（V3 i18n：由包装组件注入）*/
-  retryText?: string;
-}
-
-interface State {
-  hasError: boolean;
-  error: Error | null;
-}
-
-/**
- * 备课模块错误边界（内部类组件）。
- * 包裹独立数据区块（版本抽屉/题库选择器/知识点选择器/发布对话框），
- * 单个区块异常不影响整页。
- *
- * V3 修复：i18n 文案由外层 LessonPlanErrorBoundary 包装组件通过 useTranslations 注入。
- */
-class LessonPlanErrorBoundaryBase extends Component<Props, State> {
-  constructor(props: Props) {
-    super(props);
-    this.state = { hasError: false, error: null };
-  }
-
-  static getDerivedStateFromError(error: Error): State {
-    return { hasError: true, error };
-  }
-
-  componentDidCatch(error: Error, info: ErrorInfo): void {
-    if (this.props.onError) {
-      this.props.onError(error, info);
-    }
-  }
-
-  handleRetry = (): void => {
-    this.setState({ hasError: false, error: null });
-  };
-
-  render(): ReactNode {
-    if (this.state.hasError) {
-      if (this.props.fallback) return this.props.fallback;
-      return (
-        <div className="flex flex-col items-center justify-center p-8 gap-3 text-center">
-          <p className="text-sm text-on-surface-variant">
-            {this.state.error?.message ?? this.props.errorText}
-          </p>
-          <Button variant="outline" size="sm" onClick={this.handleRetry}>
-            {this.props.retryText}
-          </Button>
-        </div>
-      );
-    }
-    return this.props.children;
-  }
-}
-
-/**
- * 备课模块错误边界（V3 i18n 包装组件）。
- * 使用 useTranslations 注入错误文案，对外保持原有 API 不变。
- */
-export function LessonPlanErrorBoundary(props: Props): ReactNode {
-  const t = useTranslations("lessonPreparation");
-  return (
-    <LessonPlanErrorBoundaryBase
-      errorText={t("error.loadFailed")}
-      retryText={t("error.retry")}
-      {...props}
-    />
-  );
-}

src/modules/lesson-preparation/components/lesson-plan-filters.tsx

@@ -1,89 +0,0 @@
-"use client";
-
-import { useEffect, useRef, useState } from "react";
-import { useTranslations } from "next-intl";
-import { useDebounce } from "@/shared/hooks/use-debounce";
-
-interface Props {
-  onFilter: (params: {
-    query?: string;
-    subjectId?: string;
-    status?: string;
-  }) => void;
-  subjects: { id: string; name: string }[];
-  // P2 修复：加载状态，禁用输入避免重复请求
-  isLoading?: boolean;
-}
-
-export function LessonPlanFilters({ onFilter, subjects, isLoading = false }: Props) {
-  const t = useTranslations("lessonPreparation");
-  const [query, setQuery] = useState("");
-  const [subjectId, setSubjectId] = useState<string>("");
-  const [status, setStatus] = useState<string>("");
-  // 修复 P1-6：搜索 debounce 300ms
-  const debouncedQuery = useDebounce(query, 300);
-
-  // 使用 ref 存储 onFilter，避免其引用变化触发 useEffect 无限循环
-  const onFilterRef = useRef(onFilter);
-  useEffect(() => {
-    onFilterRef.current = onFilter;
-  }, [onFilter]);
-
-  useEffect(() => {
-    onFilterRef.current({
-      query: debouncedQuery || undefined,
-      subjectId: subjectId || undefined,
-      status: status || undefined,
-    });
-  }, [debouncedQuery, subjectId, status]);
-
-  return (
-    <div className="flex gap-2 flex-wrap items-center">
-      <label htmlFor="lesson-plan-search" className="sr-only">
-        {t("filters.searchPlaceholder")}
-      </label>
-      <input
-        id="lesson-plan-search"
-        placeholder={t("filters.searchPlaceholder")}
-        value={query}
-        onChange={(e) => setQuery(e.target.value)}
-        disabled={isLoading}
-        aria-busy={isLoading}
-        className="border border-outline-variant rounded-lg px-3 py-1.5 text-sm disabled:opacity-50"
-      />
-      <label htmlFor="lesson-plan-subject" className="sr-only">
-        {t("filters.allSubjects")}
-      </label>
-      <select
-        id="lesson-plan-subject"
-        value={subjectId}
-        onChange={(e) => setSubjectId(e.target.value)}
-        disabled={isLoading}
-        aria-busy={isLoading}
-        className="border border-outline-variant rounded-lg px-3 py-1.5 text-sm disabled:opacity-50"
-      >
-        <option value="">{t("filters.allSubjects")}</option>
-        {subjects.map((s) => (
-          <option key={s.id} value={s.id}>
-            {s.name}
-          </option>
-        ))}
-      </select>
-      <label htmlFor="lesson-plan-status" className="sr-only">
-        {t("filters.allStatus")}
-      </label>
-      <select
-        id="lesson-plan-status"
-        value={status}
-        onChange={(e) => setStatus(e.target.value)}
-        disabled={isLoading}
-        aria-busy={isLoading}
-        className="border border-outline-variant rounded-lg px-3 py-1.5 text-sm disabled:opacity-50"
-      >
-        <option value="">{t("filters.allStatus")}</option>
-        <option value="draft">{t("status.draft")}</option>
-        <option value="published">{t("status.published")}</option>
-      </select>
-    </div>
-  );
-}

src/modules/lesson-preparation/components/lesson-plan-list.tsx

@@ -1,9 +1,11 @@
 "use client";
 
-import { useCallback, useState } from "react";
+import { useCallback, useEffect, useRef, useState } from "react";
+import type { JSX } from "react";
 import { useTranslations } from "next-intl";
 import { LessonPlanCard } from "./lesson-plan-card";
-import { LessonPlanFilters } from "./lesson-plan-filters";
+import { FilterBar, FilterSearchInput } from "@/shared/components/ui/filter-bar";
+import { useDebounce } from "@/shared/hooks/use-debounce";
 import { useLessonPlanContextSafe } from "../providers/lesson-plan-provider";
 import type { LessonPlanListItem } from "../types";
 
@@ -20,17 +22,22 @@ interface Props {
   viewMode?: "teacher" | "student" | "parent" | "admin" | "gradeHead";
 }
 
-export function LessonPlanList({ initialItems, subjects, viewMode = "teacher" }: Props) {
+export function LessonPlanList({ initialItems, subjects, viewMode = "teacher" }: Props): JSX.Element {
   const t = useTranslations("lessonPreparation");
   const [items, setItems] = useState(initialItems);
   const [error, setError] = useState<string | null>(null);
   // P2 修复：增加筛选加载状态，避免用户重复点击
   const [isLoading, setIsLoading] = useState(false);
+  // 筛选状态
+  const [query, setQuery] = useState("");
+  const [subjectId, setSubjectId] = useState("");
+  const [status, setStatus] = useState("");
+  // 修复 P1-6：搜索 debounce 300ms
+  const debouncedQuery = useDebounce(query, 300);
   const ctx = useLessonPlanContextSafe();
   const service = ctx?.service ?? null;
 
   // V3 修复：完全通过 service 调用，不直接 import actions
-  // 若未在 Provider 内使用，则不执行任何服务端调用（强制要求 Provider 包裹）
   const handleFilter = useCallback(
     async (params: {
       query?: string;
@@ -57,9 +64,72 @@ export function LessonPlanList({ initialItems, subjects, viewMode = "teacher" }:
     [service, t],
   );
 
+  // 使用 ref 存储 handleFilter，避免其引用变化触发 useEffect 无限循环
+  const handleFilterRef = useRef(handleFilter);
+  useEffect(() => {
+    handleFilterRef.current = handleFilter;
+  }, [handleFilter]);
+
+  useEffect(() => {
+    handleFilterRef.current({
+      query: debouncedQuery || undefined,
+      subjectId: subjectId || undefined,
+      status: status || undefined,
+    });
+  }, [debouncedQuery, subjectId, status]);
+
+  const hasFilters = !!(query || subjectId || status);
+  function handleReset(): void {
+    setQuery("");
+    setSubjectId("");
+    setStatus("");
+  }
+
   return (
     <div className="space-y-4">
-      <LessonPlanFilters onFilter={handleFilter} subjects={subjects} isLoading={isLoading} />
+      <FilterBar hasFilters={hasFilters} onReset={handleReset} layout="wrap">
+        <label htmlFor="lesson-plan-search" className="sr-only">
+          {t("filters.searchPlaceholder")}
+        </label>
+        <FilterSearchInput
+          value={query}
+          onChange={setQuery}
+          placeholder={t("filters.searchPlaceholder")}
+        />
+        <label htmlFor="lesson-plan-subject" className="sr-only">
+          {t("filters.allSubjects")}
+        </label>
+        <select
+          id="lesson-plan-subject"
+          value={subjectId}
+          onChange={(e) => setSubjectId(e.target.value)}
+          disabled={isLoading}
+          aria-busy={isLoading}
+          className="border border-outline-variant rounded-lg px-3 py-1.5 text-sm disabled:opacity-50 h-9"
+        >
+          <option value="">{t("filters.allSubjects")}</option>
+          {subjects.map((s) => (
+            <option key={s.id} value={s.id}>
+              {s.name}
+            </option>
+          ))}
+        </select>
+        <label htmlFor="lesson-plan-status" className="sr-only">
+          {t("filters.allStatus")}
+        </label>
+        <select
+          id="lesson-plan-status"
+          value={status}
+          onChange={(e) => setStatus(e.target.value)}
+          disabled={isLoading}
+          aria-busy={isLoading}
+          className="border border-outline-variant rounded-lg px-3 py-1.5 text-sm disabled:opacity-50 h-9"
+        >
+          <option value="">{t("filters.allStatus")}</option>
+          <option value="draft">{t("status.draft")}</option>
+          <option value="published">{t("status.published")}</option>
+        </select>
+      </FilterBar>
       {error && (
         <p className="text-error text-sm bg-error-container/10 px-3 py-2 rounded">
           {error}

src/modules/lesson-preparation/components/lesson-plan-publish-button.tsx

@@ -0,0 +1,82 @@
+"use client";
+
+import type { JSX } from "react";
+import { useTranslations } from "next-intl";
+import { Send, Undo2 } from "lucide-react";
+import type { LessonPlanStatus } from "../types";
+import { Button } from "@/shared/components/ui/button";
+import {
+  AlertDialog,
+  AlertDialogAction,
+  AlertDialogCancel,
+  AlertDialogContent,
+  AlertDialogDescription,
+  AlertDialogFooter,
+  AlertDialogHeader,
+  AlertDialogTitle,
+  AlertDialogTrigger,
+} from "@/shared/components/ui/alert-dialog";
+
+interface Props {
+  planStatus: LessonPlanStatus;
+  publishing: boolean;
+  onPublish: () => void;
+  onUnpublish: () => void;
+}
+
+export function LessonPlanPublishButton({
+  planStatus,
+  publishing,
+  onPublish,
+  onUnpublish,
+}: Props): JSX.Element {
+  const t = useTranslations("lessonPreparation");
+  if (planStatus === "published") {
+    return (
+      <AlertDialog>
+        <AlertDialogTrigger asChild>
+          <Button variant="outline" size="sm" disabled={publishing}>
+            <Undo2 className="w-4 h-4 mr-1" /> {t("action.unpublishPlan")}
+          </Button>
+        </AlertDialogTrigger>
+        <AlertDialogContent>
+          <AlertDialogHeader>
+            <AlertDialogTitle>{t("action.unpublishPlan")}</AlertDialogTitle>
+            <AlertDialogDescription>
+              {t("action.unpublishPlanConfirm")}
+            </AlertDialogDescription>
+          </AlertDialogHeader>
+          <AlertDialogFooter>
+            <AlertDialogCancel>{t("action.cancel")}</AlertDialogCancel>
+            <AlertDialogAction onClick={onUnpublish}>
+              {t("action.confirm")}
+            </AlertDialogAction>
+          </AlertDialogFooter>
+        </AlertDialogContent>
+      </AlertDialog>
+    );
+  }
+  return (
+    <AlertDialog>
+      <AlertDialogTrigger asChild>
+        <Button size="sm" disabled={publishing}>
+          <Send className="w-4 h-4 mr-1" /> {t("action.publishPlan")}
+        </Button>
+      </AlertDialogTrigger>
+      <AlertDialogContent>
+        <AlertDialogHeader>
+          <AlertDialogTitle>{t("action.publishPlan")}</AlertDialogTitle>
+          <AlertDialogDescription>
+            {t("action.publishPlanConfirm")}
+          </AlertDialogDescription>
+        </AlertDialogHeader>
+        <AlertDialogFooter>
+          <AlertDialogCancel>{t("action.cancel")}</AlertDialogCancel>
+          <AlertDialogAction onClick={onPublish}>
+            {t("action.confirm")}
+          </AlertDialogAction>
+        </AlertDialogFooter>
+      </AlertDialogContent>
+    </AlertDialog>
+  );
+}

src/modules/lesson-preparation/components/lesson-plan-skeleton.tsx

@@ -1,79 +0,0 @@
-import type { JSX } from "react";
-import { Skeleton } from "@/shared/components/ui/skeleton";
-
-/** 版本列表骨架屏 */
-export function VersionListSkeleton(): JSX.Element {
-  return (
-    <div className="flex flex-col gap-2">
-      {Array.from({ length: 5 }).map((_, i) => (
-        <div
-          key={i}
-          className="border border-outline-variant rounded-lg p-3 space-y-2"
-        >
-          <div className="flex justify-between items-center">
-            <Skeleton className="h-4 w-12" />
-            <Skeleton className="h-3 w-8" />
-          </div>
-          <Skeleton className="h-3 w-32" />
-          <Skeleton className="h-3 w-24" />
-          <Skeleton className="h-6 w-28" />
-        </div>
-      ))}
-    </div>
-  );
-}
-
-/** 题库列表骨架屏 */
-export function QuestionBankSkeleton(): JSX.Element {
-  return (
-    <div className="space-y-2">
-      {Array.from({ length: 6 }).map((_, i) => (
-        <div
-          key={i}
-          className="border rounded p-2 flex justify-between items-center"
-        >
-          <Skeleton className="h-4 flex-1 mr-2" />
-          <Skeleton className="h-3 w-16 mr-2" />
-          <Skeleton className="h-6 w-12" />
-        </div>
-      ))}
-    </div>
-  );
-}
-
-/** 知识点列表骨架屏 */
-export function KnowledgePointSkeleton(): JSX.Element {
-  return (
-    <div className="space-y-1">
-      {Array.from({ length: 8 }).map((_, i) => (
-        <div key={i} className="flex items-center gap-2 p-2">
-          <Skeleton className="h-4 w-4" />
-          <Skeleton className="h-4 flex-1" />
-        </div>
-      ))}
-    </div>
-  );
-}
-
-/** 课案列表骨架屏 */
-export function LessonPlanListSkeleton(): JSX.Element {
-  return (
-    <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
-      {Array.from({ length: 6 }).map((_, i) => (
-        <div
-          key={i}
-          className="border border-outline-variant rounded-lg p-4 space-y-3"
-        >
-          <Skeleton className="h-5 w-3/4" />
-          <Skeleton className="h-3 w-1/2" />
-          <Skeleton className="h-3 w-2/3" />
-          <Skeleton className="h-3 w-1/3" />
-          <div className="flex gap-2 mt-3">
-            <Skeleton className="h-7 w-16" />
-            <Skeleton className="h-7 w-16" />
-          </div>
-        </div>
-      ))}
-    </div>
-  );
-}

src/modules/lesson-preparation/components/lesson-plan-toolbar.tsx

@@ -0,0 +1,212 @@
+"use client";
+
+import type { JSX } from "react";
+import { useTranslations } from "next-intl";
+import {
+  Save,
+  History,
+  Book,
+  FileText,
+  RotateCw,
+  WifiOff,
+  Printer,
+  Undo,
+  Redo,
+  CalendarClock,
+  ClipboardCheck,
+  Sparkles,
+  Layers,
+} from "lucide-react";
+import type { LessonPlanStatus } from "../types";
+import { Button } from "@/shared/components/ui/button";
+import { LessonPlanPublishButton } from "./lesson-plan-publish-button";
+
+interface Props {
+  title: string;
+  onTitleChange: (value: string) => void;
+  textbookTitle?: string;
+  chapterTitle?: string;
+  isSaving: boolean;
+  isDirty: boolean;
+  saveError: boolean;
+  isOnline: boolean;
+  canUndo: boolean;
+  canRedo: boolean;
+  onRetrySave: () => void;
+  onUndo: () => void;
+  onRedo: () => void;
+  onManualSave: () => void;
+  onShowVersions: () => void;
+  onShowPrint: () => void;
+  onShowSchedule: () => void;
+  onShowConsistency: () => void;
+  onShowAiFeedback: () => void;
+  onShowAiDifferentiation: () => void;
+  planStatus: LessonPlanStatus;
+  publishing: boolean;
+  onPublish: () => void;
+  onUnpublish: () => void;
+  showScheduleButton: boolean;
+}
+
+export function LessonPlanToolbar({
+  title,
+  onTitleChange,
+  textbookTitle,
+  chapterTitle,
+  isSaving,
+  isDirty,
+  saveError,
+  isOnline,
+  canUndo,
+  canRedo,
+  onRetrySave,
+  onUndo,
+  onRedo,
+  onManualSave,
+  onShowVersions,
+  onShowPrint,
+  onShowSchedule,
+  onShowConsistency,
+  onShowAiFeedback,
+  onShowAiDifferentiation,
+  planStatus,
+  publishing,
+  onPublish,
+  onUnpublish,
+  showScheduleButton,
+}: Props): JSX.Element {
+  const t = useTranslations("lessonPreparation");
+  return (
+    <div className="flex items-center gap-2 px-4 py-2 border-b border-outline-variant bg-surface">
+      <input
+        value={title}
+        onChange={(e) => onTitleChange(e.target.value)}
+        className="flex-1 bg-transparent font-headline-md text-headline-md focus:outline-none"
+      />
+      {/* 教材/章节指示器 */}
+      {textbookTitle && (
+        <div className="flex items-center gap-1 text-xs text-on-surface-variant px-2 py-1 rounded bg-surface-container-high">
+          <Book className="w-3 h-3" />
+          {/* arbitrary-value: layout fixed size */}
+          <span className="max-w-[120px] truncate">{textbookTitle}</span>
+          {chapterTitle && (
+            <>
+              <span className="text-on-surface-variant/50">/</span>
+              <FileText className="w-3 h-3" />
+              {/* arbitrary-value: layout fixed size */}
+              <span className="max-w-[120px] truncate">{chapterTitle}</span>
+            </>
+          )}
+        </div>
+      )}
+      <span className="text-on-surface-variant text-sm">
+        {isSaving
+          ? t("status.saving")
+          : isDirty
+            ? t("status.unsaved")
+            : t("status.saved")}
+      </span>
+      {/* V5-1：保存失败/离线提示与重试按钮 */}
+      {saveError && (
+        <Button
+          variant="outline"
+          size="sm"
+          onClick={onRetrySave}
+          disabled={isSaving}
+          className="text-error border-error"
+        >
+          <RotateCw className="w-3 h-3 mr-1" />
+          {t("status.retrySave")}
+        </Button>
+      )}
+      {!isOnline && (
+        <span className="text-xs text-error inline-flex items-center gap-1">
+          <WifiOff className="w-3 h-3" />
+          {t("status.offlineBadge")}
+        </span>
+      )}
+      <Button variant="outline" size="sm" onClick={onShowVersions}>
+        <History className="w-4 h-4 mr-1" /> {t("action.versions")}
+      </Button>
+      {/* V5-2：撤销/重做按钮 */}
+      <Button
+        variant="outline"
+        size="sm"
+        onClick={onUndo}
+        disabled={!canUndo}
+        aria-label={t("action.undo")}
+        title={t("action.undoShortcut")}
+      >
+        <Undo className="w-4 h-4" />
+      </Button>
+      <Button
+        variant="outline"
+        size="sm"
+        onClick={onRedo}
+        disabled={!canRedo}
+        aria-label={t("action.redo")}
+        title={t("action.redoShortcut")}
+      >
+        <Redo className="w-4 h-4" />
+      </Button>
+      <Button size="sm" onClick={onManualSave} disabled={isSaving}>
+        <Save className="w-4 h-4 mr-1" /> {t("action.saveVersion")}
+      </Button>
+      {/* V5-4：导出/打印按钮 */}
+      <Button
+        variant="outline"
+        size="sm"
+        onClick={onShowPrint}
+        aria-label={t("export.title")}
+      >
+        <Printer className="w-4 h-4 mr-1" /> {t("export.button")}
+      </Button>
+      {/* V5-7：安排课时按钮 */}
+      {showScheduleButton && (
+        <Button
+          variant="outline"
+          size="sm"
+          onClick={onShowSchedule}
+          aria-label={t("action.scheduleLesson")}
+        >
+          <CalendarClock className="w-4 h-4 mr-1" /> {t("action.scheduleLesson")}
+        </Button>
+      )}
+      {/* V5-19 T3：一致性校验按钮 */}
+      <Button
+        variant="outline"
+        size="sm"
+        onClick={onShowConsistency}
+        aria-label={t("editor.consistencyOpen")}
+      >
+        <ClipboardCheck className="w-4 h-4 mr-1" /> {t("editor.consistencyOpen")}
+      </Button>
+      {/* V5-17 A1/A2：AI 反馈按钮 */}
+      <Button
+        variant="outline"
+        size="sm"
+        onClick={onShowAiFeedback}
+        aria-label={t("feedback.open")}
+      >
+        <Sparkles className="w-4 h-4 mr-1" /> {t("feedback.open")}
+      </Button>
+      {/* V5-21 A3/A4/A5：AI 差异化与课标核对按钮 */}
+      <Button
+        variant="outline"
+        size="sm"
+        onClick={onShowAiDifferentiation}
+        aria-label={t("aiDifferentiation.open")}
+      >
+        <Layers className="w-4 h-4 mr-1" /> {t("aiDifferentiation.open")}
+      </Button>
+      {/* 发布/撤回发布按钮（P0-1 修复）*/}
+      <LessonPlanPublishButton
+        planStatus={planStatus}
+        publishing={publishing}
+        onPublish={onPublish}
+        onUnpublish={onUnpublish}
+      />
+    </div>
+  );
+}

src/modules/lesson-preparation/components/question-bank-picker.tsx

@@ -6,7 +6,7 @@ import { useQuestionService } from "../providers/lesson-plan-provider"
 import type { QuestionPickerItem, QuestionPickerParams } from "../providers/lesson-plan-provider"
 import { Button } from "@/shared/components/ui/button"
 import { FocusTrap } from "@/shared/components/a11y/focus-trap"
-import { QuestionBankSkeleton } from "./lesson-plan-skeleton"
+import { SkeletonCard } from "@/shared/components/ui/skeleton"
 import { useDebounce } from "@/shared/hooks/use-debounce"
 import { X, ChevronDown, ChevronRight } from "lucide-react"
 import { QuestionBankFilters } from "@/shared/components/question/question-bank-filters"
@@ -196,7 +196,7 @@ export function QuestionBankPicker({ onPick, onClose, existingIds }: Props) {
         </div>
         <div className="flex-1 overflow-y-auto p-4">
           {loading ? (
-            <QuestionBankSkeleton />
+            <SkeletonCard variant="list" rows={6} />
           ) : error ? (
             <p className="text-error text-sm text-center py-8">{error}</p>
           ) : questions.length === 0 ? (

src/modules/lesson-preparation/components/version-history-drawer.tsx

@@ -6,7 +6,7 @@ import { toast } from "sonner";
 import { useLessonPlanContextSafe, useLessonPlanTrackerSafe } from "../providers/lesson-plan-provider";
 import { Button } from "@/shared/components/ui/button";
 import { FocusTrap } from "@/shared/components/a11y/focus-trap";
-import { VersionListSkeleton } from "./lesson-plan-skeleton";
+import { SkeletonCard } from "@/shared/components/ui/skeleton";
 import {
   AlertDialog,
   AlertDialogAction,
@@ -128,7 +128,7 @@ export function VersionHistoryDrawer({
           <>
             <h3 className="font-headline-md text-headline-md mb-4">{t("version.title")}</h3>
             {loading ? (
-              <VersionListSkeleton />
+              <SkeletonCard variant="list" rows={5} />
             ) : versions.length === 0 ? (
               <p className="text-on-surface-variant">{t("version.empty")}</p>
             ) : (

src/modules/lesson-preparation/hooks/use-lesson-plan-persistence.ts

@@ -0,0 +1,155 @@
+"use client";
+
+import { useCallback, useEffect, useRef } from "react";
+import { useTranslations } from "next-intl";
+import { toast } from "sonner";
+import { useLessonPlanEditor } from "./use-lesson-plan-editor";
+import type {
+  LessonPlanDataService,
+  LessonPlanTracker,
+} from "../providers/lesson-plan-provider";
+
+interface Params {
+  planId: string;
+  service: LessonPlanDataService | null;
+  tracker: LessonPlanTracker;
+}
+
+interface PersistenceActions {
+  handleRetrySave: () => Promise<void>;
+  handleManualSave: () => Promise<void>;
+  handleReverted: () => Promise<void>;
+}
+
+/**
+ * 课案持久化逻辑：自动保存（debounce 3s）、定时版本（30min）、手动保存/重试/回退刷新。
+ * 从 LessonPlanEditor 容器提取，避免容器超过 300 行。
+ */
+export function useLessonPlanPersistence({
+  planId,
+  service,
+  tracker,
+}: Params): PersistenceActions {
+  const t = useTranslations("lessonPreparation");
+  const isDirty = useLessonPlanEditor((s) => s.isDirty);
+  const isOnline = useLessonPlanEditor((s) => s.isOnline);
+  const doc = useLessonPlanEditor((s) => s.doc);
+  const autoSaveTimer = useRef<ReturnType<typeof setTimeout> | null>(null);
+  const versionTimer = useRef<ReturnType<typeof setInterval> | null>(null);
+
+  // 自动保存（debounce 3s）- 用 getState() 获取最新值（修复 P1-4）
+  // V5-1：保存失败显示 toast + 设置 saveError；断网时不触发保存
+  useEffect(() => {
+    if (!isDirty || !service || !isOnline) return;
+    if (autoSaveTimer.current) clearTimeout(autoSaveTimer.current);
+    autoSaveTimer.current = setTimeout(async () => {
+      const state = useLessonPlanEditor.getState();
+      state.setSaving(true);
+      try {
+        const res = await service.updateLessonPlan({
+          planId: state.planId,
+          title: state.title,
+          content: state.doc,
+        });
+        if (res.success) {
+          if (state.saveError) toast.success(t("status.recovered"));
+          state.markSaved();
+        } else {
+          state.setSaveError(true);
+          toast.error(t("status.saveFailed"), { description: t("status.saveFailedHint") });
+        }
+      } catch (e) {
+        console.error("[LessonPlanEditor] auto-save failed", e);
+        state.setSaveError(true);
+        toast.error(t("status.saveFailed"), { description: t("status.saveFailedHint") });
+      } finally {
+        state.setSaving(false);
+      }
+    }, 3000);
+    return () => {
+      if (autoSaveTimer.current) clearTimeout(autoSaveTimer.current);
+    };
+  }, [isDirty, doc, planId, service, isOnline, t]);
+
+  // 定时自动版本（30min）
+  useEffect(() => {
+    if (!service) return;
+    versionTimer.current = setInterval(async () => {
+      const state = useLessonPlanEditor.getState();
+      if (!state.isDirty) return;
+      try {
+        await service.saveLessonPlanVersion({
+          planId: state.planId,
+          content: state.doc,
+          label: t("version.autoLabel"),
+        });
+      } catch (e) {
+        console.error("[LessonPlanEditor] auto-version failed", e);
+      }
+    }, 30 * 60 * 1000);
+    return () => {
+      if (versionTimer.current) clearInterval(versionTimer.current);
+    };
+  }, [planId, t, service]);
+
+  // V5-1：手动重试保存（saveError 时显示按钮）
+  const handleRetrySave = useCallback(async () => {
+    if (!service) return;
+    const state = useLessonPlanEditor.getState();
+    state.setSaving(true);
+    try {
+      const res = await service.updateLessonPlan({
+        planId: state.planId,
+        title: state.title,
+        content: state.doc,
+      });
+      if (res.success) {
+        toast.success(t("status.recovered"));
+        state.markSaved();
+      } else {
+        toast.error(t("status.saveFailed"));
+      }
+    } catch (e) {
+      console.error("[LessonPlanEditor] retry save failed", e);
+      toast.error(t("status.saveFailed"));
+    } finally {
+      state.setSaving(false);
+    }
+  }, [service, t]);
+
+  const handleManualSave = useCallback(async () => {
+    if (!service) return;
+    const state = useLessonPlanEditor.getState();
+    state.setSaving(true);
+    try {
+      const res = await service.saveLessonPlanVersion({
+        planId: state.planId,
+        content: state.doc,
+      });
+      if (res.success) {
+        state.markSaved();
+        tracker.track("lesson_plan.save", { planId: state.planId, source: "manual" });
+      }
+    } catch (e) {
+      console.error("[LessonPlanEditor] manual save failed", e);
+    } finally {
+      state.setSaving(false);
+    }
+  }, [tracker, service]);
+
+  // 版本回退后刷新内容（修复 P1-1）
+  const handleReverted = useCallback(async () => {
+    if (!service) return;
+    const state = useLessonPlanEditor.getState();
+    try {
+      const res = await service.getLessonPlanById(state.planId);
+      if (res.success && res.data?.plan) {
+        state.hydrate(state.planId, res.data.plan.title, res.data.plan.content);
+      }
+    } catch (e) {
+      console.error("[LessonPlanEditor] reload after revert failed", e);
+    }
+  }, [service]);
+
+  return { handleRetrySave, handleManualSave, handleReverted };
+}

src/shared/components/ui/stats-grid.tsx

@@ -11,7 +11,7 @@ import { StatCard } from "@/shared/components/ui/stat-card"
  * - practice-stats-cards / practice-overview-stats-cards
  * - analytics-stats-cards
  */
-interface StatItem {
+export interface StatItem {
   /** 卡片标题 */
   label: string
   /** 统计数值 */

src/shared/i18n/messages/en/lesson-preparation.json

@@ -591,6 +591,8 @@
     "createFailed": "Creation failed",
     "loadFailed": "Page load failed",
     "loadFailedDesc": "Sorry, an unexpected error occurred. Please try again later.",
+    "boundaryTitle": "Lesson preparation section failed to load",
+    "boundaryDescription": "An error occurred while loading lesson preparation data. Please retry.",
     "retry": "Retry",
     "invalidQuestionType": "Invalid question type",
     "duplicateSuffix": " - Copy",

src/shared/i18n/messages/zh-CN/lesson-preparation.json

@@ -591,6 +591,8 @@
     "createFailed": "创建失败",
     "loadFailed": "页面加载失败",
     "loadFailedDesc": "抱歉，页面加载时发生了意外错误。请稍后重试。",
+    "boundaryTitle": "备课区块加载失败",
+    "boundaryDescription": "加载备课数据时发生错误，请重试。",
     "retry": "重试",
     "invalidQuestionType": "无效的题目类型",
     "duplicateSuffix": " - 副本",