feat: Web后台登录认证

- 新增登录页面 (templates/login.html)
- HMAC-SHA256 cookie 认证中间件
- 所有页面和API需登录访问
- /health 保持公开
- 首页右上角退出按钮
- 默认账号 admin/admin123
- Cookie 有效期7天
- 版本升级至 v1.1.0

Makefile

@@ -1,5 +1,5 @@
 APP_NAME := xiaji-go
-VERSION := 1.0.0
+VERSION := 1.1.0
 GIT_COMMIT := $(shell git rev-parse --short HEAD 2>/dev/null || echo "unknown")
 BUILD_TIME := $(shell date -u '+%Y-%m-%dT%H:%M:%SZ')
 LDFLAGS := -X xiaji-go/version.Version=$(VERSION) \

internal/web/server.go

@@ -1,9 +1,13 @@
 package web
 
 import (
+	"crypto/hmac"
+	"crypto/sha256"
+	"encoding/hex"
 	"fmt"
 	"net/http"
 	"strconv"
+	"time"
 
 	"xiaji-go/models"
 
@@ -16,10 +20,51 @@ type WebServer struct {
 	port      int
 	username  string
 	password  string
+	secretKey string
 }
 
 func NewWebServer(db *gorm.DB, port int, username, password string) *WebServer {
-	return &WebServer{db: db, port: port, username: username, password: password}
+	return &WebServer{
+		db:        db,
+		port:      port,
+		username:  username,
+		password:  password,
+		secretKey: "xiaji-go-session-" + password, // 简单派生
+	}
+}
+
+// generateToken 生成登录 token
+func (s *WebServer) generateToken(username string) string {
+	mac := hmac.New(sha256.New, []byte(s.secretKey))
+	mac.Write([]byte(username))
+	return hex.EncodeToString(mac.Sum(nil))
+}
+
+// validateToken 验证 token
+func (s *WebServer) validateToken(username, token string) bool {
+	expected := s.generateToken(username)
+	return hmac.Equal([]byte(expected), []byte(token))
+}
+
+// authRequired 登录认证中间件
+func (s *WebServer) authRequired() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		username, _ := c.Cookie("xiaji_user")
+		token, _ := c.Cookie("xiaji_token")
+
+		if username == "" || token == "" || !s.validateToken(username, token) {
+			// 判断是 API 请求还是页面请求
+			path := c.Request.URL.Path
+			if len(path) >= 4 && path[:4] == "/api" || c.Request.Method == "POST" {
+				c.JSON(http.StatusUnauthorized, gin.H{"error": "未登录"})
+			} else {
+				c.Redirect(http.StatusFound, "/login")
+			}
+			c.Abort()
+			return
+		}
+		c.Next()
+	}
 }
 
 func (s *WebServer) Start() {
@@ -27,17 +72,26 @@ func (s *WebServer) Start() {
 	r := gin.Default()
 	r.LoadHTMLGlob("templates/*")
 
-	// 页面
+	// 公开路由（无需登录）
-	r.GET("/", s.handleIndex)
+	r.GET("/login", s.handleLoginPage)
-	r.GET("/api/records", s.handleRecords)
+	r.POST("/login", s.handleLogin)
-	r.POST("/delete/:id", s.handleDelete)
+	r.GET("/logout", s.handleLogout)
-	r.GET("/export", s.handleExport)
 
-	// 健康检查
+	// 健康检查（公开）
 	r.GET("/health", func(c *gin.Context) {
 		c.JSON(http.StatusOK, gin.H{"status": "ok"})
 	})
 
+	// 需要登录的路由
+	auth := r.Group("/")
+	auth.Use(s.authRequired())
+	{
+		auth.GET("/", s.handleIndex)
+		auth.GET("/api/records", s.handleRecords)
+		auth.POST("/delete/:id", s.handleDelete)
+		auth.GET("/export", s.handleExport)
+	}
+
 	logAddr := fmt.Sprintf(":%d", s.port)
 	fmt.Printf("🌐 Web后台运行在 http://127.0.0.1%s\n", logAddr)
 	if err := r.Run(logAddr); err != nil {
@@ -45,8 +99,43 @@ func (s *WebServer) Start() {
 	}
 }
 
+func (s *WebServer) handleLoginPage(c *gin.Context) {
+	// 已登录则跳转首页
+	username, _ := c.Cookie("xiaji_user")
+	token, _ := c.Cookie("xiaji_token")
+	if username != "" && token != "" && s.validateToken(username, token) {
+		c.Redirect(http.StatusFound, "/")
+		return
+	}
+	c.HTML(http.StatusOK, "login.html", gin.H{"error": ""})
+}
+
+func (s *WebServer) handleLogin(c *gin.Context) {
+	username := c.PostForm("username")
+	password := c.PostForm("password")
+
+	if username == s.username && password == s.password {
+		token := s.generateToken(username)
+		maxAge := 7 * 24 * 3600 // 7天
+
+		c.SetCookie("xiaji_user", username, maxAge, "/", "", false, true)
+		c.SetCookie("xiaji_token", token, maxAge, "/", "", false, true)
+		c.Redirect(http.StatusFound, "/")
+		return
+	}
+
+	c.HTML(http.StatusOK, "login.html", gin.H{"error": "用户名或密码错误"})
+}
+
+func (s *WebServer) handleLogout(c *gin.Context) {
+	c.SetCookie("xiaji_user", "", -1, "/", "", false, true)
+	c.SetCookie("xiaji_token", "", -1, "/", "", false, true)
+	c.Redirect(http.StatusFound, "/login")
+}
+
 func (s *WebServer) handleIndex(c *gin.Context) {
-	c.HTML(http.StatusOK, "index.html", nil)
+	username, _ := c.Cookie("xiaji_user")
+	c.HTML(http.StatusOK, "index.html", gin.H{"username": username})
 }
 
 func (s *WebServer) handleRecords(c *gin.Context) {
@@ -102,8 +191,11 @@ func (s *WebServer) handleExport(c *gin.Context) {
 	var items []models.Transaction
 	s.db.Where("is_deleted = ?", false).Order("date asc, id asc").Find(&items)
 
+	now := time.Now().Format("20060102")
+	filename := fmt.Sprintf("xiaji_%s.csv", now)
+
 	c.Header("Content-Type", "text/csv; charset=utf-8")
-	c.Header("Content-Disposition", "attachment; filename=transactions.csv")
+	c.Header("Content-Disposition", fmt.Sprintf("attachment; filename=%s", filename))
 
 	// BOM for Excel
 	c.Writer.Write([]byte{0xEF, 0xBB, 0xBF})

templates/index.html

@@ -11,6 +11,9 @@ body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-
 .header { background: linear-gradient(135deg, #ff6b6b, #ee5a24); color: #fff; padding: 20px; text-align: center; position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 10px rgba(0,0,0,.15); }
 .header h1 { font-size: 24px; margin-bottom: 4px; }
 .header .subtitle { font-size: 13px; opacity: .85; }
+.header { position: relative; }
+.logout-btn { position: absolute; right: 16px; top: 50%; transform: translateY(-50%); background: rgba(255,255,255,.2); color: #fff; text-decoration: none; padding: 5px 14px; border-radius: 6px; font-size: 13px; transition: background .2s; }
+.logout-btn:hover { background: rgba(255,255,255,.35); }
 
 .stats { display: flex; gap: 10px; padding: 15px; overflow-x: auto; }
 .stat-card { flex: 1; min-width: 120px; background: #fff; border-radius: 12px; padding: 15px; text-align: center; box-shadow: 0 2px 8px rgba(0,0,0,.06); }
@@ -67,6 +70,7 @@ body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-
 <div class="header">
   <h1>🦞 虾记记账</h1>
   <div class="subtitle">Xiaji-Go 记账管理</div>
+  <a href="/logout" class="logout-btn" title="退出登录">退出</a>
 </div>
 
 <div class="stats">

templates/login.html

@@ -0,0 +1,126 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+<meta charset="UTF-8">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+<title>🦞 虾记 - 登录</title>
+<style>
+* { margin: 0; padding: 0; box-sizing: border-box; }
+body {
+  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
+  background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 50%, #f39c12 100%);
+  min-height: 100vh;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 20px;
+}
+
+.login-card {
+  background: #fff;
+  border-radius: 20px;
+  padding: 40px 32px;
+  width: 100%;
+  max-width: 380px;
+  box-shadow: 0 20px 60px rgba(0,0,0,.2);
+  animation: slideUp .4s ease;
+}
+
+@keyframes slideUp {
+  from { opacity: 0; transform: translateY(30px); }
+  to { opacity: 1; transform: translateY(0); }
+}
+
+.login-logo {
+  text-align: center;
+  margin-bottom: 28px;
+}
+.login-logo .icon { font-size: 52px; }
+.login-logo h1 {
+  font-size: 22px;
+  color: #333;
+  margin-top: 8px;
+}
+.login-logo .subtitle {
+  font-size: 13px;
+  color: #999;
+  margin-top: 4px;
+}
+
+.form-group {
+  margin-bottom: 18px;
+}
+.form-group label {
+  display: block;
+  font-size: 13px;
+  color: #666;
+  margin-bottom: 6px;
+  font-weight: 500;
+}
+.form-group input {
+  width: 100%;
+  padding: 12px 16px;
+  border: 2px solid #eee;
+  border-radius: 10px;
+  font-size: 15px;
+  transition: border-color .2s;
+  outline: none;
+}
+.form-group input:focus {
+  border-color: #ee5a24;
+}
+
+.btn-login {
+  width: 100%;
+  padding: 13px;
+  background: linear-gradient(135deg, #ff6b6b, #ee5a24);
+  color: #fff;
+  border: none;
+  border-radius: 10px;
+  font-size: 16px;
+  font-weight: 600;
+  cursor: pointer;
+  transition: opacity .2s, transform .1s;
+  margin-top: 6px;
+}
+.btn-login:hover { opacity: .9; }
+.btn-login:active { transform: scale(.98); }
+
+.error-msg {
+  background: #fff2f0;
+  color: #e74c3c;
+  padding: 10px 14px;
+  border-radius: 8px;
+  font-size: 13px;
+  margin-bottom: 16px;
+  text-align: center;
+  border: 1px solid #fde2e0;
+}
+</style>
+</head>
+<body>
+<div class="login-card">
+  <div class="login-logo">
+    <div class="icon">🦞</div>
+    <h1>虾记记账</h1>
+    <div class="subtitle">Xiaji-Go 管理后台</div>
+  </div>
+
+  {{if .error}}
+  <div class="error-msg">{{.error}}</div>
+  {{end}}
+
+  <form method="POST" action="/login">
+    <div class="form-group">
+      <label>用户名</label>
+      <input type="text" name="username" placeholder="请输入用户名" autocomplete="username" autofocus required>
+    </div>
+    <div class="form-group">
+      <label>密码</label>
+      <input type="password" name="password" placeholder="请输入密码" autocomplete="current-password" required>
+    </div>
+    <button type="submit" class="btn-login">登 录</button>
+  </form>
+</div>
+</body>
+</html>