feat: 历史记录增强+IPC响应式Proxy修复+水印异常处理

electron/main/ipc.ts

@@ -43,8 +43,31 @@ function getDb() {
       ai_score REAL,
       teacher_score REAL,
       confidence REAL,
-      created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+      created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+      question_title TEXT DEFAULT '',
+      max_score REAL DEFAULT 100,
+      reference_answer TEXT DEFAULT '',
+      rubric TEXT DEFAULT '',
+      deductions TEXT DEFAULT '',
+      comment TEXT DEFAULT '',
+      result_json TEXT DEFAULT '',
+      image_data TEXT DEFAULT ''
     )`).run()
+    // migrate: add columns for existing DBs
+    const migrateCols: { name: string; type: string }[] = [
+      { name: 'question_title', type: 'TEXT DEFAULT \'\'' },
+      { name: 'max_score', type: 'REAL DEFAULT 100' },
+      { name: 'reference_answer', type: 'TEXT DEFAULT \'\'' },
+      { name: 'rubric', type: 'TEXT DEFAULT \'\'' },
+      { name: 'deductions', type: 'TEXT DEFAULT \'\'' },
+      { name: 'comment', type: 'TEXT DEFAULT \'\'' },
+      { name: 'result_json', type: 'TEXT DEFAULT \'\'' },
+      { name: 'image_data', type: 'TEXT DEFAULT \'\'' },
+      { name: 'reference_answer_image', type: 'TEXT DEFAULT \'\'' }
+    ]
+    for (const col of migrateCols) {
+      try { db.prepare(`ALTER TABLE history ADD COLUMN ${col.name} ${col.type}`).run() } catch (_) {}
+    }
     db.prepare(`CREATE TABLE IF NOT EXISTS exam (
       id INTEGER PRIMARY KEY AUTOINCREMENT,
       name TEXT,
@@ -180,6 +203,15 @@ export function setupIpc(win: BrowserWindow): void {
     }
   })
 
+  ipcMain.handle('history:getById', (_event, id: number) => {
+    try {
+      const record = getDb().prepare('SELECT * FROM history WHERE id = ?').get(id) as any
+      return record || null
+    } catch {
+      return null
+    }
+  })
+
   ipcMain.handle('grading:submit', (_event, data: {
     questionId: number
     imagePath: string
@@ -187,22 +219,40 @@ export function setupIpc(win: BrowserWindow): void {
     teacherScore: number
     confidence: number
     studentAnswer?: string
+    questionTitle?: string
+    maxScore?: number
+    referenceAnswer?: string
+    rubric?: string
+    deductions?: string[]
+    comment?: string
+    resultJson?: string
+    imageData?: string
+    referenceAnswerImage?: string
   }) => {
-    try {
-      getDb().prepare(`INSERT INTO history (question_id, image_path, student_answer, ai_score, teacher_score, confidence)
-        VALUES (?, ?, ?, ?, ?, ?)`).run(
-        data.questionId || 0,
-        data.imagePath || '',
-        data.studentAnswer || '',
-        data.aiScore,
-        data.teacherScore,
-        data.confidence
-      )
-      return true
-    } catch (err) {
-      log.error('grading:submit error:', err)
-      return false
-    }
+    log.info('grading:submit called', JSON.stringify({ ...data, imageData: data.imageData ? `len=${data.imageData.length}` : 'empty', referenceAnswerImage: data.referenceAnswerImage ? `len=${data.referenceAnswerImage.length}` : 'empty' }))
+    const deductionsStr = JSON.stringify(data.deductions || [])
+    getDb().prepare(`INSERT INTO history
+      (question_id, image_path, student_answer, ai_score, teacher_score, confidence,
+       question_title, max_score, reference_answer, rubric, deductions, comment, result_json, image_data,
+       reference_answer_image)
+      VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`).run(
+      data.questionId || 0,
+      data.imagePath || '',
+      data.studentAnswer || '',
+      data.aiScore,
+      data.teacherScore,
+      data.confidence,
+      data.questionTitle || '',
+      data.maxScore ?? 100,
+      data.referenceAnswer || '',
+      data.rubric || '',
+      deductionsStr,
+      data.comment || '',
+      data.resultJson || '',
+      data.imageData || '',
+      data.referenceAnswerImage || ''
+    )
+    return true
   })
 
   ipcMain.handle('template:list', () => {

electron/preload/preload.ts

@@ -33,7 +33,8 @@ contextBridge.exposeInMainWorld('electronAPI', {
 
   history: {
     list: () => ipcRenderer.invoke('history:list'),
-    delete: (id: number) => ipcRenderer.invoke('history:delete', id)
+    delete: (id: number) => ipcRenderer.invoke('history:delete', id),
+    getById: (id: number) => ipcRenderer.invoke('history:getById', id)
   },
 
   grading: {