feat: 新增备课模块并修复全模块 P0/P1/P2 缺陷

主要变更:

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

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

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

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

- 新增 drizzle 迁移 0002_tiny_lionheart 及 snapshot

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

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

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

- 同步架构文档 004/005 反映新增模块、导出、依赖关系

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

src/modules/settings/components/ai-provider-settings-card.tsx

@@ -43,7 +43,7 @@ const AiProviderFormSchema = z.object({
 type AiProviderFormValues = z.infer<typeof AiProviderFormSchema>
 
 const providerLabels: Record<z.infer<typeof ProviderSchema>, string> = {
-  zhipu: "智谱",
+  zhipu: "Zhipu",
   openai: "OpenAI",
   gemini: "Gemini",
   custom: "Custom",
@@ -110,7 +110,12 @@ export function AiProviderSettingsCard({
     loadedRef.current = true
     startTransition(async () => {
       try {
-        const rows = await getAiProviderSummaries()
+        const result = await getAiProviderSummaries()
+        if (!result.success || !result.data) {
+          toast.error(result.message ?? "Failed to load AI providers")
+          return
+        }
+        const rows = result.data
         setProviders(rows)
         onProvidersChanged?.(rows)
         if (initialMode === "new") {
@@ -215,7 +220,12 @@ export function AiProviderSettingsCard({
         toast.success(result.message ?? "Saved")
         setTestStatus("idle")
         setLastTestedSignature("")
-        const rows = await getAiProviderSummaries()
+        const summariesResult = await getAiProviderSummaries()
+        if (!summariesResult.success || !summariesResult.data) {
+          toast.error(summariesResult.message ?? "Failed to load AI providers")
+          return
+        }
+        const rows = summariesResult.data
         setProviders(rows)
         onProvidersChanged?.(rows)
         const nextId = result.data ?? payload.id ?? ""
@@ -295,7 +305,7 @@ export function AiProviderSettingsCard({
                 name="provider"
                 render={({ field }) => (
                   <FormItem>
-                    <FormLabel>品牌方</FormLabel>
+                    <FormLabel>Provider</FormLabel>
                     <Select value={field.value} onValueChange={field.onChange}>
                       <FormControl>
                         <SelectTrigger>
@@ -303,7 +313,7 @@ export function AiProviderSettingsCard({
                         </SelectTrigger>
                       </FormControl>
                       <SelectContent>
-                        <SelectItem value="zhipu">智谱</SelectItem>
+                        <SelectItem value="zhipu">Zhipu</SelectItem>
                         <SelectItem value="openai">OpenAI</SelectItem>
                         <SelectItem value="gemini">Gemini</SelectItem>
                         <SelectItem value="custom">Custom</SelectItem>
@@ -322,7 +332,7 @@ export function AiProviderSettingsCard({
                     <FormControl>
                       <Input {...field} placeholder="https://open.bigmodel.cn/api/paas/v4" />
                     </FormControl>
-                    <FormDescription>填写基础地址，不要包含 /chat/completions。</FormDescription>
+                    <FormDescription>Enter base URL without /chat/completions suffix.</FormDescription>
                     <FormMessage />
                   </FormItem>
                 )}
@@ -349,7 +359,7 @@ export function AiProviderSettingsCard({
                     <FormControl>
                       <Input type="password" {...field} placeholder="Paste new key to replace" />
                     </FormControl>
-                    <FormDescription>不会回显历史 Key，留空表示不更新。</FormDescription>
+                    <FormDescription>Existing key won&apos;t be displayed. Leave blank to keep current.</FormDescription>
                     <FormMessage />
                   </FormItem>
                 )}
@@ -364,7 +374,7 @@ export function AiProviderSettingsCard({
                   <FormControl>
                     <Checkbox checked={!!field.value} onCheckedChange={(value) => field.onChange(value === true)} />
                   </FormControl>
-                  <FormLabel>设为默认</FormLabel>
+                  <FormLabel>Set as default</FormLabel>
                 </FormItem>
               )}
             />