feat(settings,questions,school,textbooks): add brand config, question components, school dialogs, textbooks hooks

settings:

- Add actions-brand, brand-config, data-access-brand for brand management

- Add admin-file-upload-card, admin-notification-config-card, admin-school-info-card, admin-security-policy-card

- Add ai-provider-delete-dialog, ai-provider-selector, brand-config-card

- Add security-recent-logins-section, security-two-factor-section

- Add config/profile-overview-config, data-access-profile-overview, lib/system-settings-utils

questions:

- Add batch-operations, import-export-buttons, knowledge-point-selector, options-editor

- Add question-bank-results-client, question-cascade-filter, question-content-renderer, utils

school:

- Add grade-delete-dialog, grade-form-dialog, grade-list-toolbar, grade-overview-cards

- Add use-grade-data hook

textbooks:

- Add textbook-form-fields component

- Add use-kp-create, use-kp-delete, use-kp-update hooks

src/modules/textbooks/components/knowledge-graph.tsx

@@ -37,6 +37,7 @@ import {
 import { Button } from "@/shared/components/ui/button"
 import type { GraphViewMode, GraphNodeData } from "../types"
 import { computeGraphLayout } from "../graph-layout"
+import type { GraphLayoutNodeData } from "../graph-layout"
 import { useGraphData } from "../hooks/use-graph-data"
 import {
   createPrerequisiteAction,
@@ -202,35 +203,44 @@ function KnowledgeGraphInner({ textbookId, initialViewMode = "structure" }: Know
   const handleAddPrerequisite = useCallback(async () => {
     if (!selectedKpId || !newPrereqId || !textbookId) return
     setIsSavingPrereq(true)
-    const formData = new FormData()
-    formData.set("knowledgePointId", selectedKpId)
-    formData.set("prerequisiteKpId", newPrereqId)
-    formData.set("textbookId", textbookId)
-    const result = await createPrerequisiteAction(formData)
-    setIsSavingPrereq(false)
-    if (result.success) {
-      toast.success(t("graph.detail.prerequisiteAdded"))
-      setAddPrereqOpen(false)
-      setNewPrereqId("")
-      reload()
-    } else {
-      toast.error(result.message)
+    try {
+      const formData = new FormData()
+      formData.set("knowledgePointId", selectedKpId)
+      formData.set("prerequisiteKpId", newPrereqId)
+      formData.set("textbookId", textbookId)
+      const result = await createPrerequisiteAction(formData)
+      if (result.success) {
+        toast.success(t("graph.detail.prerequisiteAdded"))
+        setAddPrereqOpen(false)
+        setNewPrereqId("")
+        reload()
+      } else {
+        toast.error(result.message)
+      }
+    } catch (e) {
+      toast.error(e instanceof Error ? e.message : t("graph.detail.prerequisiteAddFailed"))
+    } finally {
+      setIsSavingPrereq(false)
     }
   }, [selectedKpId, newPrereqId, textbookId, t, reload])
 
   // 删除前置依赖
   const handleRemovePrerequisite = useCallback(async (prereqId: string) => {
     if (!selectedKpId || !textbookId) return
-    const formData = new FormData()
-    formData.set("knowledgePointId", selectedKpId)
-    formData.set("prerequisiteKpId", prereqId)
-    formData.set("textbookId", textbookId)
-    const result = await deletePrerequisiteAction(formData)
-    if (result.success) {
-      toast.success(t("graph.detail.prerequisiteRemoved"))
-      reload()
-    } else {
-      toast.error(result.message)
+    try {
+      const formData = new FormData()
+      formData.set("knowledgePointId", selectedKpId)
+      formData.set("prerequisiteKpId", prereqId)
+      formData.set("textbookId", textbookId)
+      const result = await deletePrerequisiteAction(formData)
+      if (result.success) {
+        toast.success(t("graph.detail.prerequisiteRemoved"))
+        reload()
+      } else {
+        toast.error(result.message)
+      }
+    } catch (e) {
+      toast.error(e instanceof Error ? e.message : t("graph.detail.prerequisiteRemoveFailed"))
     }
   }, [selectedKpId, textbookId, t, reload])
 
@@ -306,9 +316,10 @@ function KnowledgeGraphInner({ textbookId, initialViewMode = "structure" }: Know
             <MiniMap
               className="!bg-background !border !rounded-lg"
               nodeColor={(node) => {
-                // node.data 是 Record<string, unknown>；从 unknown 安全转换读取 graphData
-                const graphData = (node.data as unknown as { graphData?: { chapterColor: string } })?.graphData
-                return graphData?.chapterColor ?? "#6b7280"
+                // 安全的类型收窄：node.data 是 Record<string, unknown>，
+                // GraphLayoutNodeData 有索引签名 [key: string]: unknown，是 Record 的子类型
+                const data = node.data as GraphLayoutNodeData
+                return data.graphData?.chapterColor ?? "#6b7280"
               }}
             />
           </ReactFlow>