feat: 门户网站初始提交

- Go + Gin + html/template 服务端渲染
- 主页:Google 风格搜索框 + 导航卡片
- 后台:卡片 CRUD、搜索引擎配置、主页背景/标题配置
- 图片上传:支持 jpg/jpeg/png/gif,自动压缩,缩略图参数 ?thumb=1
- 安全:登录日志、修改密码、IP 自动封禁、IP 白名单
- 访问统计:主页访问/卡片点击/搜索追踪、实时流量、IP 统计
- SQLite 存储(modernc.org/sqlite,纯 Go)
- 内存 Session + bcrypt 密码哈希
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2026-05-28 13:54:07 +08:00
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sequenceDiagram
participant U as 用户浏览器
participant G as Gin Router
participant H as HandlerAdmin
participant AM as AdminModel
participant SS as SessionStore
U->>G: GET /admin/login
G->>H: LoginGet(c)
H-->>U: 登录页 HTML
U->>G: POST /admin/login {username, password}
G->>H: LoginPost(c)
H->>AM: VerifyPassword(username, password)
AM->>AM: bcrypt.CompareHashAndPassword()
AM-->>H: true/false
alt 验证成功
H->>SS: Create(adminID, username)
SS-->>H: sessionID
H->>H: c.SetCookie("session_id", sessionID, 86400, "/", "", false, true)
H-->>U: 302 Redirect → /admin
else 验证失败
H-->>U: 200 + 登录页(错误提示)
end