feat: 评分标准保存为模板功能

electron/main/ipc.ts

@@ -72,8 +72,10 @@ function getDb() {
       id INTEGER PRIMARY KEY AUTOINCREMENT,
       name TEXT,
       course TEXT,
+      questions_json TEXT DEFAULT '',
       created_at DATETIME DEFAULT CURRENT_TIMESTAMP
     )`).run()
+    try { db.prepare(`ALTER TABLE exam ADD COLUMN questions_json TEXT DEFAULT ''`).run() } catch (_) {}
     db.prepare(`CREATE TABLE IF NOT EXISTS question (
       id INTEGER PRIMARY KEY AUTOINCREMENT,
       exam_id INTEGER,
@@ -161,7 +163,12 @@ export function setupIpc(win: BrowserWindow): void {
       return result
     } catch (err: any) {
       log.error('AI grade failed:', err)
-      throw new Error(err.message || 'AI grading failed')
+      const apiMsg = err?.response?.data?.error?.message || ''
+      const allMsg = (apiMsg + ' ' + (err.message || '')).toLowerCase()
+      if (allMsg.includes('does not support image') || allMsg.includes('image input') || allMsg.includes('not support image')) {
+        throw new Error('当前模型不支持图片输入，请在设置中更换为支持多模态的模型（如 gpt-4o、qwen-vl 等）')
+      }
+      throw new Error(apiMsg || err.message || 'AI grading failed')
     }
   })
 
@@ -258,17 +265,24 @@ export function setupIpc(win: BrowserWindow): void {
   ipcMain.handle('template:list', () => {
     try {
       const db = getDb()
-      const exams = db.prepare('SELECT * FROM exam ORDER BY created_at DESC').all()
-      return exams
+      const exams = db.prepare('SELECT * FROM exam ORDER BY created_at DESC').all() as any[]
+      const result = exams.map((e: any) => {
+        const questions = e.questions_json ? JSON.parse(e.questions_json) : []
+        log.info('template:list item', { id: e.id, name: e.name, jsonLen: (e.questions_json || '').length, questionCount: questions.length })
+        return { ...e, questions }
+      })
+      return result
     } catch {
       return []
     }
   })
 
-  ipcMain.handle('template:save', (_event, data: { name: string; course: string }) => {
+  ipcMain.handle('template:save', (_event, data: { name: string; course: string; questions?: any[] }) => {
     try {
       const db = getDb()
-      const result = db.prepare('INSERT INTO exam (name, course) VALUES (?, ?)').run(data.name, data.course)
+      const questionsJson = JSON.stringify(data.questions || [])
+      log.info('template:save', { name: data.name, course: data.course, questionCount: data.questions?.length ?? 0, jsonLen: questionsJson.length })
+      const result = db.prepare('INSERT INTO exam (name, course, questions_json) VALUES (?, ?, ?)').run(data.name, data.course, questionsJson)
       return result.lastInsertRowid
     } catch (err) {
       log.error('template:save error:', err)
@@ -276,6 +290,38 @@ export function setupIpc(win: BrowserWindow): void {
     }
   })
 
+  ipcMain.handle('template:delete', (_event, id: number) => {
+    try {
+      getDb().prepare('DELETE FROM exam WHERE id = ?').run(id)
+      return true
+    } catch {
+      return false
+    }
+  })
+
+  ipcMain.handle('template:apply', (_event, id: number) => {
+    try {
+      const db = getDb()
+      const row = db.prepare('SELECT * FROM exam WHERE id = ?').get(id) as any
+      if (!row) throw new Error('模板不存在')
+      const questions = row.questions_json ? JSON.parse(row.questions_json) : []
+      if (!questions.length) throw new Error('模板中没有题目')
+      db.prepare('DELETE FROM rubric').run()
+      const insert = db.prepare(
+        'INSERT INTO rubric (question_title, max_score, reference_answer, rubric, sort_order, reference_answer_image) VALUES (?, ?, ?, ?, ?, ?)'
+      )
+      for (let i = 0; i < questions.length; i++) {
+        const q = questions[i]
+        insert.run(q.questionTitle || '', q.maxScore ?? 100, q.referenceAnswer || '', q.rubric || '', i, q.referenceAnswerImage || '')
+      }
+      rubricNextIndex = 0
+      return true
+    } catch (err) {
+      log.error('template:apply error:', err)
+      return false
+    }
+  })
+
   // --- Dialog child windows ---
   ipcMain.handle('dialog:open', (_event, { type, data }: { type: string; data?: any }) => {
     log.info('IPC: dialog:open', type)

electron/preload/preload.ts

@@ -62,7 +62,9 @@ contextBridge.exposeInMainWorld('electronAPI', {
 
   template: {
     list: () => ipcRenderer.invoke('template:list'),
-    save: (data: { name: string; course: string }) => ipcRenderer.invoke('template:save', data)
+    save: (data: { name: string; course: string; questions?: any[] }) => ipcRenderer.invoke('template:save', data),
+    delete: (id: number) => ipcRenderer.invoke('template:delete', id),
+    apply: (id: number) => ipcRenderer.invoke('template:apply', id)
   },
 
   dialog: {