feat: 评分标准 JSON 导入/导出

electron/main/ipc.ts

@@ -283,6 +283,37 @@ export function setupIpc(win: BrowserWindow): void {
     return null
   })
 
+  ipcMain.handle('rubric:exportJson', async () => {
+    const d = getDb()
+    const rows: any[] = d.prepare('SELECT * FROM rubric ORDER BY sort_order').all()
+    if (!rows.length) throw new Error('暂无评分标准可导出')
+    const questions = rows.map(r => ({
+      questionTitle: r.question_title,
+      maxScore: r.max_score,
+      referenceAnswer: r.reference_answer,
+      rubric: r.rubric
+    }))
+    const result = await dialogBox.showSaveDialog({
+      defaultPath: '评分标准.json',
+      filters: [{ name: 'JSON', extensions: ['json'] }]
+    })
+    if (result.canceled || !result.filePath) return false
+    fs.writeFileSync(result.filePath, JSON.stringify(questions, null, 2), 'utf-8')
+    return true
+  })
+
+  ipcMain.handle('rubric:importJson', async () => {
+    const result = await dialogBox.showOpenDialog({
+      properties: ['openFile'],
+      filters: [{ name: 'JSON', extensions: ['json'] }]
+    })
+    if (result.canceled || result.filePaths.length === 0) return null
+    const content = fs.readFileSync(result.filePaths[0], 'utf-8')
+    const questions = JSON.parse(content)
+    if (!Array.isArray(questions)) throw new Error('JSON 格式错误：应为数组')
+    return { questions, currentIndex: 0 }
+  })
+
   // --- Grading data bridge (toolbar → result window) ---
   ipcMain.handle('grading:storeData', (_event, data: any) => {
     gradingPayload = data

electron/preload/preload.ts

@@ -50,7 +50,9 @@ contextBridge.exposeInMainWorld('electronAPI', {
 
   rubric: {
     storeData: (data: any) => ipcRenderer.invoke('rubric:storeData', data),
-    getData: () => ipcRenderer.invoke('rubric:getData')
+    getData: () => ipcRenderer.invoke('rubric:getData'),
+    exportJson: () => ipcRenderer.invoke('rubric:exportJson'),
+    importJson: () => ipcRenderer.invoke('rubric:importJson')
   },
 
   template: {