feat: establish teaching feedback mini program

Connect student profiles, defaults, and feedback records to the Rust API. Configure the WeChat AppID, custom tab bar, and local development workflow for version 0.1.0.

utils/types.ts

@@ -0,0 +1,52 @@
+export type Term = '春' | '暑' | '秋' | '寒'
+
+export interface StudentProfile {
+  id: string
+  name: string
+  grade: string
+  subject: string
+  academicYear: number
+  term: Term
+  guardianTitle: string
+  startTime: string
+  endTime: string
+  createdAt: number
+  updatedAt: number
+}
+
+export interface StudentProfileDefaults {
+  grade: string
+  subject: string
+  lessonDurationMinutes: number
+}
+
+export interface StudentDraft {
+  name: string
+  grade: string
+  subject: string
+  academicYear: number
+  term: Term
+  guardianTitle: string
+  startTime: string
+  endTime: string
+}
+
+export interface FeedbackRecord {
+  id: string
+  profileId: string | null
+  feedbackDate: string
+  content: string
+  createdAt: number
+  updatedAt: number
+}
+
+export interface FeedbackDraft {
+  profileId: string | null
+  feedbackDate: string
+  content: string
+}
+
+export interface HealthStatus {
+  status: string
+  databaseConfigured: boolean
+}