docs(website): 添加简记memo产品原型和UI设计规范文档

- 新增「简记memo」一体化小程序产品原型设计文档
- 新增简记memo完整版UI视觉设计规范和界面细节
- 添加IDEA项目配置文件.gitignore
- 创建404页面HTML文件，包含响应式布局和错误提示
- 添加关于页面HTML文件，展示品牌介绍和团队信息
- 实现AES加解密工具函数，支持请求体加密
- 添加用户协议页面基础框架

models/daily_progress.go

@@ -0,0 +1,19 @@
+// 每日进度表：sm_daily_progress
+package models
+
+import "gorm.io/gorm"
+
+type DailyProgress struct {
+	gorm.Model
+	UserID         uint   `gorm:"column:user_id;type:bigint unsigned;not null;uniqueIndex:idx_user_date;comment:用户ID" json:"user_id" db:"user_id"`
+	RecordDate     string `gorm:"column:record_date;type:varchar(10);not null;uniqueIndex:idx_user_date;comment:日期 yyyy-MM-dd" json:"record_date" db:"record_date"`
+	TaskCount      int    `gorm:"column:task_count;type:int;default:0;comment:完成任务数" json:"task_count" db:"task_count"`
+	TotalTasks     int    `gorm:"column:total_tasks;type:int;default:0;comment:当日待办总数" json:"total_tasks" db:"total_tasks"`
+	BillCount      int    `gorm:"column:bill_count;type:int;default:0;comment:记账笔数" json:"bill_count" db:"bill_count"`
+	MoodRecorded   bool   `gorm:"column:mood_recorded;type:tinyint(1);default:0;comment:是否记录心情" json:"mood_recorded" db:"mood_recorded"`
+	MoodType       string `gorm:"column:mood_type;type:varchar(20);default:'';comment:心情类型 happy/normal/sad" json:"mood_type" db:"mood_type"`
+	ReviewRecorded bool   `gorm:"column:review_recorded;type:tinyint(1);default:0;comment:是否复盘" json:"review_recorded" db:"review_recorded"`
+	PerfectDay     bool   `gorm:"column:perfect_day;type:tinyint(1);default:0;comment:是否完美一天(100%完成待办)" json:"perfect_day" db:"perfect_day"`
+	DailyExp       int    `gorm:"column:daily_exp;type:int;default:0;comment:今日获得经验" json:"daily_exp" db:"daily_exp"`
+	ExpBreakdown   string `gorm:"column:exp_breakdown;type:varchar(200);default:'';comment:经验构成JSON" json:"exp_breakdown" db:"exp_breakdown"`
+}