chore: 上线前优化 — 清理调试日志/启用组件按需注入/补全组件声明

- 移除全项目 34 处调试 console.* 输出
- project.config.json: minified true、uploadWithSourceMap false、启用 lazyCodeLoading(requiredComponents 组件按需注入)
- pages/records/records.json 补全 ui-skeleton 组件声明(此前漏声明,WXML 已使用)
- 删除根目录残留 preview-buttons.html

pages/settings/settings.js

@@ -187,11 +187,9 @@ Page({
     try {
       permanentUrl = await this._uploadAvatar(avatarUrl)
     } catch (err) {
-      console.warn('[avatar] cloud upload failed, trying base64:', err)
       try {
         permanentUrl = await util.fileToDataURI(avatarUrl)
       } catch (err2) {
-        console.warn('[avatar] base64 convert failed, saving temp URL:', err2)
         permanentUrl = avatarUrl
       }
     }
@@ -377,7 +375,6 @@ Page({
       await cloud.clearAll()
     } catch (e) {
       cloudClearFailed = true
-      console.warn('[settings] cloud clear failed:', e)
     }
 
     // 4. Reinstate default settings and streak