init: AI Grading Assistant MVP

src/types/index.ts

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+export interface GradeResult {
+  score: number
+  confidence: number
+  deductions: string[]
+  comment: string
+  commit?: string
+}
+
+export interface ApiConfig {
+  apiKey: string
+  baseUrl: string
+  model: string
+}
+
+export interface AppSettings {
+  apiKey: string
+  baseUrl: string
+  model: string
+  shortcut: string
+  theme: string
+  fontSize: number
+  proxy: string
+  timeout: number
+  screenshotSavePath: string
+}
+
+export interface HistoryRecord {
+  id: number
+  question_id: number
+  image_path: string
+  student_answer: string
+  ai_score: number
+  teacher_score: number
+  confidence: number
+  created_at: string
+}
+
+export interface ElectronAPI {
+  window: {
+    dragMove: (deltaX: number, deltaY: number) => Promise<void>
+    dragEnd: (x: number, y: number) => Promise<void>
+  }
+  screenshot: {
+    start: () => Promise<void>
+    capture: (region: { x: number; y: number; width: number; height: number }) => Promise<string | null>
+    cancel: () => Promise<void>
+    getLastImage: () => Promise<string | null>
+    onCompleted: (callback: (base64: string) => void) => () => void
+  }
+  ai: {
+    grade: (data: { imageBase64: string; rubric: string; apiConfig: ApiConfig; maxScore?: number; referenceAnswer?: string; questionTitle?: string }) => Promise<GradeResult>
+  }
+  settings: {
+    get: () => Promise<AppSettings>
+    set: (settings: Record<string, unknown>) => Promise<boolean>
+    selectDirectory: () => Promise<string | null>
+  }
+  history: {
+    list: () => Promise<HistoryRecord[]>
+    delete: (id: number) => Promise<boolean>
+  }
+  grading: {
+    submit: (data: {
+      questionId: number
+      imagePath: string
+      aiScore: number
+      teacherScore: number
+      confidence: number
+      studentAnswer?: string
+    }) => Promise<boolean>,
+    storeData: (data: any) => Promise<void>,
+    getData: () => Promise<any>
+  }
+  rubric: {
+    storeData: (data: any) => Promise<void>
+    getData: () => Promise<any>
+  }
+  template: {
+    list: () => Promise<unknown[]>
+    save: (data: { name: string; course: string }) => Promise<number | null>
+  }
+  dialog: {
+    open: (type: string, data?: any) => Promise<void>
+    close: () => void
+    getPayload: (type: string) => Promise<any>
+    openImage: () => Promise<{ base64: string; mime: string; filePath: string } | null>
+  }
+}
+
+declare global {
+  interface Window {
+    electronAPI: ElectronAPI
+  }
+}