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.

pages/profile/index.ts

@@ -0,0 +1,54 @@
+import {
+  DEVELOPMENT_USER_ID,
+  getApiBaseUrl,
+  getApiErrorMessage,
+  getHealth,
+  setApiBaseUrl
+} from '../../utils/api'
+
+type InputEvent = { detail: { value: string } }
+
+Page({
+  data: {
+    apiBaseUrl: getApiBaseUrl(),
+    developmentUserId: DEVELOPMENT_USER_ID,
+    connectionText: '尚未检测',
+    connectionTone: 'idle',
+    testing: false
+  },
+
+  onShow() {
+    this.getTabBar()?.setData({ selected: 3 })
+    this.setData({ apiBaseUrl: getApiBaseUrl() })
+    void this.checkConnection()
+  },
+
+  onUrlInput(event: InputEvent) {
+    this.setData({ apiBaseUrl: event.detail.value })
+  },
+
+  async saveAndCheck() {
+    try {
+      const apiBaseUrl = setApiBaseUrl(this.data.apiBaseUrl)
+      this.setData({ apiBaseUrl })
+      await this.checkConnection()
+    } catch (error) {
+      this.setData({ connectionText: getApiErrorMessage(error), connectionTone: 'error' })
+    }
+  },
+
+  async checkConnection() {
+    this.setData({ testing: true, connectionText: '正在检测服务...', connectionTone: 'idle' })
+    try {
+      const health = await getHealth()
+      this.setData({
+        connectionText: health.databaseConfigured ? '服务和数据库连接正常' : '服务正常，数据库尚未配置',
+        connectionTone: health.databaseConfigured ? 'success' : 'warning'
+      })
+    } catch (error) {
+      this.setData({ connectionText: getApiErrorMessage(error), connectionTone: 'error' })
+    } finally {
+      this.setData({ testing: false })
+    }
+  }
+})