add tags and category pages, then update backend apis

package-lock.json

@@ -1,11 +1,11 @@
 {
-  "name": "tidal-trappist",
+  "name": "novablog",
   "version": "0.0.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
-      "name": "tidal-trappist",
+      "name": "novablog",
       "version": "0.0.1",
       "dependencies": {
         "@astrojs/mdx": "^4.3.13",
@@ -13,7 +13,8 @@
         "@astrojs/vue": "^5.1.4",
         "@tailwindcss/typography": "^0.5.19",
         "astro": "^5.17.1",
-        "tailwindcss": "^3.4.19",
+        "marked": "^17.0.3",
+        "tailwindcss": "^3.4.0",
         "vue": "^3.5.29"
       }
     },
@@ -4633,6 +4634,18 @@
         "url": "https://github.com/sponsors/wooorm"
       }
     },
+    "node_modules/marked": {
+      "version": "17.0.3",
+      "resolved": "https://registry.npmjs.org/marked/-/marked-17.0.3.tgz",
+      "integrity": "sha512-jt1v2ObpyOKR8p4XaUJVk3YWRJ5n+i4+rjQopxvV32rSndTJXvIzuUdWWIy/1pFQMkQmvTXawzDNqOH/CUmx6A==",
+      "license": "MIT",
+      "bin": {
+        "marked": "bin/marked.js"
+      },
+      "engines": {
+        "node": ">= 20"
+      }
+    },
     "node_modules/mdast-util-definitions": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/mdast-util-definitions/-/mdast-util-definitions-6.0.0.tgz",

package.json

@@ -14,7 +14,8 @@
     "@astrojs/vue": "^5.1.4",
     "@tailwindcss/typography": "^0.5.19",
     "astro": "^5.17.1",
+    "marked": "^17.0.3",
     "tailwindcss": "^3.4.0",
     "vue": "^3.5.29"
   }
-}
+}

public/images/hello-world.svg

@@ -0,0 +1,11 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="1200" height="630" viewBox="0 0 1200 630">
+  <defs>
+    <linearGradient id="grad" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" style="stop-color:#667eea;stop-opacity:1" />
+      <stop offset="100%" style="stop-color:#764ba2;stop-opacity:1" />
+    </linearGradient>
+  </defs>
+  <rect width="1200" height="630" fill="url(#grad)"/>
+  <text x="600" y="280" font-family="Arial, sans-serif" font-size="72" font-weight="bold" fill="white" text-anchor="middle">NovaBlog</text>
+  <text x="600" y="380" font-family="Arial, sans-serif" font-size="32" fill="white" text-anchor="middle" opacity="0.9">极简程序员博客系统</text>
+</svg>

server/cmd/server/main.go

@@ -65,8 +65,8 @@ func main() {
 		// 公开接口
 		api.POST("/auth/register", authHandler.Register)
 		api.POST("/auth/login", authHandler.Login)
+		api.GET("/auth/me", authHandler.GetCurrentUser) // 获取当前用户信息（需要 token 但通过 header 传递）
 		api.GET("/comments", commentHandler.GetComments)
-		api.POST("/comments", commentHandler.CreateComment) // 允许访客评论
 		api.GET("/likes", likeHandler.GetLikeStatus)
 		api.POST("/likes", likeHandler.ToggleLike) // 允许访客点赞（基于 IP Hash）
 
@@ -78,7 +78,8 @@ func main() {
 			authGroup.GET("/auth/profile", authHandler.GetProfile)
 			authGroup.PUT("/auth/profile", authHandler.UpdateProfile)
 
-			// 评论相关（用户删除自己的评论）
+			// 评论相关（需要登录才能评论）
+			authGroup.POST("/comments", commentHandler.CreateComment)
 			authGroup.DELETE("/comments/:id", commentHandler.DeleteComment)
 		}
 

server/internal/database/database.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/novablog/server/internal/config"
 	"github.com/novablog/server/internal/models"
+	"github.com/novablog/server/internal/utils"
 	"gorm.io/driver/sqlite"
 	"gorm.io/gorm"
 	"gorm.io/gorm/logger"
@@ -37,6 +38,11 @@ func Initialize(cfg *config.Config) error {
 		return fmt.Errorf("failed to migrate database: %w", err)
 	}
 
+	// 创建默认管理员用户
+	if err := createDefaultAdmin(); err != nil {
+		return fmt.Errorf("failed to create default admin: %w", err)
+	}
+
 	return nil
 }
 
@@ -58,4 +64,35 @@ func Close() error {
 		return err
 	}
 	return sqlDB.Close()
-}
+}
+
+// createDefaultAdmin 创建默认管理员用户
+func createDefaultAdmin() error {
+	// 检查是否已存在 admin 用户
+	var count int64
+	DB.Model(&models.User{}).Where("username = ?", "admin").Count(&count)
+	if count > 0 {
+		return nil // 已存在，跳过
+	}
+
+	// 创建 admin 用户
+	hashedPassword, err := utils.HashPassword("admin")
+	if err != nil {
+		return fmt.Errorf("failed to hash password: %w", err)
+	}
+
+	admin := models.User{
+		Username: "admin",
+		Email:    "admin@novablog.local",
+		Password: hashedPassword,
+		Role:     "admin",
+		Nickname: "Administrator",
+	}
+
+	if err := DB.Create(&admin).Error; err != nil {
+		return fmt.Errorf("failed to create admin user: %w", err)
+	}
+
+	fmt.Println("✅ Default admin user created: admin / admin")
+	return nil
+}

server/internal/handlers/auth.go

@@ -136,6 +136,45 @@ func (h *AuthHandler) Login(c *gin.Context) {
 	})
 }
 
+// GetCurrentUser 获取当前用户信息（通过 Authorization header）
+func (h *AuthHandler) GetCurrentUser(c *gin.Context) {
+	// 从 header 获取 token
+	authHeader := c.GetHeader("Authorization")
+	if authHeader == "" {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "no token provided"})
+		return
+	}
+
+	// 解析 Bearer token
+	tokenString := ""
+	if len(authHeader) > 7 && authHeader[:7] == "Bearer " {
+		tokenString = authHeader[7:]
+	} else {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "invalid token format"})
+		return
+	}
+
+	// 验证 token
+	claims, err := h.jwtManager.ParseToken(tokenString)
+	if err != nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "invalid token"})
+		return
+	}
+
+	// 获取用户信息
+	var user models.User
+	if err := database.DB.First(&user, claims.UserID).Error; err != nil {
+		if err == gorm.ErrRecordNotFound {
+			c.JSON(http.StatusNotFound, gin.H{"error": "user not found"})
+			return
+		}
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "database error"})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{"user": user})
+}
+
 // GetProfile 获取当前用户信息
 func (h *AuthHandler) GetProfile(c *gin.Context) {
 	userID, _ := middleware.GetUserID(c)

server/internal/handlers/comment.go

@@ -28,14 +28,21 @@ type CreateCommentRequest struct {
 
 // CreateComment 创建评论
 func (h *CommentHandler) CreateComment(c *gin.Context) {
-	userID, _ := middleware.GetUserID(c)
-
 	var req CreateCommentRequest
 	if err := c.ShouldBindJSON(&req); err != nil {
 		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 		return
 	}
 
+	// 尝试从上下文获取用户 ID（如果有认证中间件）
+	userID, isLoggedIn := middleware.GetUserID(c)
+	
+	// 如果没有登录，返回错误（评论需要登录）
+	if !isLoggedIn || userID == 0 {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "请登录后再评论"})
+		return
+	}
+
 	comment := models.Comment{
 		PostID:   req.PostID,
 		UserID:   userID,
@@ -82,9 +89,11 @@ func (h *CommentHandler) GetComments(c *gin.Context) {
 
 	query.Count(&total)
 
-	if err := query.Preload("User").
+	// 使用 Joins 显式加载用户信息，确保数据完整
+	if err := query.
+		Joins("LEFT JOIN users ON users.id = comments.user_id").
 		Preload("Replies.User").
-		Order("created_at DESC").
+		Order("comments.created_at DESC").
 		Offset((page - 1) * pageSize).
 		Limit(pageSize).
 		Find(&comments).Error; err != nil {
@@ -92,6 +101,25 @@ func (h *CommentHandler) GetComments(c *gin.Context) {
 		return
 	}
 
+	// 手动加载每个评论的用户信息（确保 Preload 正确工作）
+	for i := range comments {
+		if comments[i].UserID > 0 {
+			var user models.User
+			if err := database.DB.First(&user, comments[i].UserID).Error; err == nil {
+				comments[i].User = user
+			}
+		}
+		// 加载回复的用户信息
+		for j := range comments[i].Replies {
+			if comments[i].Replies[j].UserID > 0 {
+				var replyUser models.User
+				if err := database.DB.First(&replyUser, comments[i].Replies[j].UserID).Error; err == nil {
+					comments[i].Replies[j].User = replyUser
+				}
+			}
+		}
+	}
+
 	c.JSON(http.StatusOK, gin.H{
 		"data": comments,
 		"pagination": gin.H{

src/components/CommentSection.vue

@@ -45,7 +45,7 @@
           <div class="flex-shrink-0">
             <div class="w-10 h-10 rounded-full bg-primary-100 dark:bg-primary-900 flex items-center justify-center">
               <span class="text-primary-600 dark:text-primary-400 font-medium">
-                {{ (comment.user.nickname || comment.user.username)[0].toUpperCase() }}
+                {{ getInitial(comment.user) }}
               </span>
             </div>
           </div>
@@ -53,10 +53,10 @@
           <!-- 内容 -->
           <div class="flex-1 min-w-0">
             <div class="flex items-center gap-2 mb-1">
-              <span class="font-medium">{{ comment.user.nickname || comment.user.username }}</span>
+              <span class="font-medium">{{ getDisplayName(comment.user) }}</span>
               <span class="text-xs text-foreground/40">{{ formatDate(comment.created_at) }}</span>
             </div>
-            <p class="text-foreground/80 whitespace-pre-wrap">{{ comment.content }}</p>
+            <div class="comment-content prose prose-sm dark:prose-invert max-w-none" v-html="renderMarkdown(comment.content)"></div>
             
             <!-- 回复按钮 -->
             <button
@@ -94,16 +94,16 @@
             <div class="flex-shrink-0">
               <div class="w-8 h-8 rounded-full bg-primary-100 dark:bg-primary-900 flex items-center justify-center">
                 <span class="text-primary-600 dark:text-primary-400 text-sm font-medium">
-                  {{ (reply.user.nickname || reply.user.username)[0].toUpperCase() }}
+                  {{ getInitial(reply.user) }}
                 </span>
               </div>
             </div>
             <div class="flex-1">
               <div class="flex items-center gap-2 mb-1">
-                <span class="font-medium text-sm">{{ reply.user.nickname || reply.user.username }}</span>
+                <span class="font-medium text-sm">{{ getDisplayName(reply.user) }}</span>
                 <span class="text-xs text-foreground/40">{{ formatDate(reply.created_at) }}</span>
               </div>
-              <p class="text-foreground/80 text-sm">{{ reply.content }}</p>
+              <div class="comment-content prose prose-sm dark:prose-invert max-w-none text-sm" v-html="renderMarkdown(reply.content)"></div>
             </div>
           </div>
         </div>
@@ -135,6 +135,13 @@
 
 <script setup lang="ts">
 import { ref, onMounted, computed } from 'vue';
+import { marked } from 'marked';
+
+// 配置 marked 选项 - 安全模式，禁止 HTML 标签
+marked.setOptions({
+  breaks: true, // 支持 GFM 换行
+  gfm: true, // GitHub Flavored Markdown
+});
 
 const props = defineProps<{
   postId: string;
@@ -179,11 +186,12 @@ async function loadComments() {
     );
     const data = await response.json();
     if (response.ok) {
-      comments.value = data.data;
+      comments.value = Array.isArray(data.data) ? data.data : [];
-      pagination.value = data.pagination;
+      pagination.value = data.pagination || { page: 1, pageSize: 20, total: 0, totalPage: 0 };
     }
   } catch (error) {
     console.error('Failed to load comments:', error);
+    comments.value = [];
   } finally {
     loading.value = false;
   }
@@ -263,6 +271,19 @@ function loadPage(page: number) {
   loadComments();
 }
 
+// 获取用户首字母
+function getInitial(user: any): string {
+  if (!user) return '?';
+  const name = user.nickname || user.username || '匿名';
+  return name[0].toUpperCase();
+}
+
+// 获取用户显示名称
+function getDisplayName(user: any): string {
+  if (!user) return '匿名用户';
+  return user.nickname || user.username || '匿名用户';
+}
+
 // 格式化日期
 function formatDate(dateString: string) {
   const date = new Date(dateString);
@@ -285,6 +306,18 @@ function formatDate(dateString: string) {
   });
 }
 
+// 渲染 Markdown 内容（安全模式）
+function renderMarkdown(content: string): string {
+  if (!content) return '';
+  try {
+    // 使用 marked 解析 Markdown，返回 HTML 字符串
+    return marked.parse(content) as string;
+  } catch (error) {
+    console.error('Failed to parse markdown:', error);
+    return content;
+  }
+}
+
 onMounted(() => {
   loadComments();
 });
@@ -294,4 +327,102 @@ onMounted(() => {
 .comment-section {
   @apply mt-12 pt-8 border-t border-border;
 }
-</style>
+
+/* 评论内容 Markdown 样式 */
+.comment-content :deep(p) {
+  @apply my-2 leading-relaxed text-gray-700 dark:text-gray-300;
+}
+
+.comment-content :deep(p:first-child) {
+  @apply mt-0;
+}
+
+.comment-content :deep(p:last-child) {
+  @apply mb-0;
+}
+
+.comment-content :deep(a) {
+  @apply text-primary-500 hover:underline;
+}
+
+.comment-content :deep(strong) {
+  @apply font-bold text-gray-900 dark:text-gray-100;
+}
+
+.comment-content :deep(em) {
+  @apply italic;
+}
+
+.comment-content :deep(code) {
+  @apply bg-gray-100 dark:bg-gray-800 px-1.5 py-0.5 rounded text-sm font-mono text-primary-600 dark:text-primary-400;
+}
+
+.comment-content :deep(pre) {
+  @apply bg-gray-100 dark:bg-gray-800 p-4 rounded-lg overflow-x-auto my-3;
+}
+
+.comment-content :deep(pre code) {
+  @apply bg-transparent p-0 text-sm;
+}
+
+.comment-content :deep(blockquote) {
+  @apply border-l-4 border-primary-500 pl-4 my-3 italic text-gray-500 dark:text-gray-400;
+}
+
+.comment-content :deep(ul),
+.comment-content :deep(ol) {
+  @apply my-2 pl-6;
+}
+
+.comment-content :deep(ul) {
+  @apply list-disc;
+}
+
+.comment-content :deep(ol) {
+  @apply list-decimal;
+}
+
+.comment-content :deep(li) {
+  @apply my-1 text-gray-700 dark:text-gray-300;
+}
+
+.comment-content :deep(h1),
+.comment-content :deep(h2),
+.comment-content :deep(h3),
+.comment-content :deep(h4) {
+  @apply font-bold text-gray-900 dark:text-gray-100 mt-4 mb-2;
+}
+
+.comment-content :deep(h1) {
+  @apply text-xl;
+}
+
+.comment-content :deep(h2) {
+  @apply text-lg;
+}
+
+.comment-content :deep(h3) {
+  @apply text-base;
+}
+
+.comment-content :deep(hr) {
+  @apply border-gray-200 dark:border-gray-700 my-4;
+}
+
+.comment-content :deep(img) {
+  @apply max-w-full rounded-lg my-2;
+}
+
+.comment-content :deep(table) {
+  @apply w-full border-collapse my-4;
+}
+
+.comment-content :deep(th),
+.comment-content :deep(td) {
+  @apply border border-gray-200 dark:border-gray-700 px-3 py-2 text-left;
+}
+
+.comment-content :deep(th) {
+  @apply bg-gray-100 dark:bg-gray-800 font-bold;
+}
+</style>

src/components/UserStatus.vue

@@ -0,0 +1,83 @@
+<template>
+  <div class="flex items-center gap-3">
+    <template v-if="isLoggedIn && user">
+      <span class="text-sm text-foreground/70">你好, {{ user.nickname || user.username }}</span>
+      <button 
+        @click="handleLogout" 
+        class="btn-ghost px-3 py-1.5 rounded-lg text-sm font-medium text-red-500 hover:text-red-600"
+      >
+        退出
+      </button>
+    </template>
+    <template v-else>
+      <a href="/login" class="btn-ghost px-3 py-1.5 rounded-lg text-sm font-medium">
+        登录
+      </a>
+    </template>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref, onMounted } from 'vue'
+
+interface User {
+  id: number
+  username: string
+  nickname: string
+  email: string
+  role: string
+}
+
+const isLoggedIn = ref(false)
+const user = ref<User | null>(null)
+
+const API_BASE = import.meta.env.PUBLIC_API_BASE || 'http://localhost:8080'
+
+// 检查登录状态
+const checkAuth = async () => {
+  const token = localStorage.getItem('token')
+  if (!token) {
+    isLoggedIn.value = false
+    user.value = null
+    return
+  }
+
+  try {
+    const response = await fetch(`${API_BASE}/api/auth/me`, {
+      headers: {
+        'Authorization': `Bearer ${token}`
+      }
+    })
+
+    if (response.ok) {
+      const data = await response.json()
+      user.value = data.user
+      isLoggedIn.value = true
+    } else {
+      // Token 无效，清除
+      localStorage.removeItem('token')
+      localStorage.removeItem('user')
+      isLoggedIn.value = false
+      user.value = null
+    }
+  } catch (error) {
+    console.error('Failed to check auth:', error)
+    isLoggedIn.value = false
+    user.value = null
+  }
+}
+
+// 退出登录
+const handleLogout = () => {
+  localStorage.removeItem('token')
+  localStorage.removeItem('user')
+  isLoggedIn.value = false
+  user.value = null
+  // 刷新页面
+  window.location.href = '/'
+}
+
+onMounted(() => {
+  checkAuth()
+})
+</script>

src/layouts/BaseLayout.astro

@@ -1,5 +1,6 @@
 ---
 import '../styles/global.css';
+import UserStatus from '../components/UserStatus.vue';
 
 interface Props {
   title: string;
@@ -104,16 +105,15 @@ const socialImageURL = image.startsWith('http') ? image : new URL(image, site).h
         <div class="hidden md:flex items-center gap-6">
           <a href="/" class="text-foreground/70 hover:text-foreground transition-colors">首页</a>
           <a href="/blog" class="text-foreground/70 hover:text-foreground transition-colors">博客</a>
+          <a href="/categories" class="text-foreground/70 hover:text-foreground transition-colors">分类</a>
           <a href="/tags" class="text-foreground/70 hover:text-foreground transition-colors">标签</a>
           <a href="/about" class="text-foreground/70 hover:text-foreground transition-colors">关于</a>
         </div>
 
         <!-- Actions -->
         <div class="flex items-center gap-3">
-          <!-- Login Link -->
+          <!-- User Status (登录状态) -->
-          <a href="/login" class="btn-ghost px-3 py-1.5 rounded-lg text-sm font-medium">
+          <UserStatus client:load />
-            登录
-          </a>
 
           <!-- Theme Toggle -->
           <button
@@ -151,6 +151,7 @@ const socialImageURL = image.startsWith('http') ? image : new URL(image, site).h
         <div class="content-width py-4 flex flex-col gap-3">
           <a href="/" class="text-foreground/70 hover:text-foreground transition-colors py-2">首页</a>
           <a href="/blog" class="text-foreground/70 hover:text-foreground transition-colors py-2">博客</a>
+          <a href="/categories" class="text-foreground/70 hover:text-foreground transition-colors py-2">分类</a>
           <a href="/tags" class="text-foreground/70 hover:text-foreground transition-colors py-2">标签</a>
           <a href="/about" class="text-foreground/70 hover:text-foreground transition-colors py-2">关于</a>
         </div>

src/pages/categories/index.astro

@@ -0,0 +1,265 @@
+---
+import BaseLayout from '../../layouts/BaseLayout.astro';
+import { getCollection } from 'astro:content';
+
+// 获取所有文章
+const allPosts = await getCollection('blog', ({ data }) => {
+  return !data.draft;
+});
+
+// 构建分类树结构
+interface CategoryNode {
+  name: string;
+  fullName: string;
+  count: number;
+  children: Map<string, CategoryNode>;
+  posts: typeof allPosts;
+}
+
+function buildCategoryTree(posts: typeof allPosts): CategoryNode {
+  const root: CategoryNode = {
+    name: 'root',
+    fullName: '',
+    count: 0,
+    children: new Map(),
+    posts: [],
+  };
+
+  posts.forEach((post) => {
+    const category = post.data.category;
+    if (!category) {
+      root.posts.push(post);
+      root.count++;
+      return;
+    }
+
+    // 支持多级分类，用 / 分隔，如 "技术/前端/React"
+    const parts = category.split('/').map((p) => p.trim());
+    let current = root;
+
+    parts.forEach((part, index) => {
+      const fullName = parts.slice(0, index + 1).join('/');
+      if (!current.children.has(part)) {
+        current.children.set(part, {
+          name: part,
+          fullName: fullName,
+          count: 0,
+          children: new Map(),
+          posts: [],
+        });
+      }
+      const node = current.children.get(part)!;
+      node.count++;
+      
+      // 如果是最后一级，添加文章
+      if (index === parts.length - 1) {
+        node.posts.push(post);
+      }
+      
+      current = node;
+    });
+  });
+
+  return root;
+}
+
+const categoryTree = buildCategoryTree(allPosts);
+
+// 统计总数
+const totalCategories = (() => {
+  let count = 0;
+  function countNodes(node: CategoryNode) {
+    count += node.children.size;
+    node.children.forEach((child) => countNodes(child));
+  }
+  countNodes(categoryTree);
+  return count;
+})();
+
+// 格式化日期
+function formatDate(date: Date): string {
+  return date.toLocaleDateString('zh-CN', {
+    year: 'numeric',
+    month: 'short',
+    day: 'numeric',
+  });
+}
+
+// 递归渲染分类节点
+function renderCategoryNode(node: CategoryNode, level: number): string {
+  const sortedChildren = [...node.children.values()].sort((a, b) => a.name.localeCompare(b.name, 'zh-CN'));
+  const hasChildren = sortedChildren.length > 0;
+  const hasPosts = node.posts.length > 0;
+  
+  let html = '';
+  
+  if (node.name !== 'root') {
+    html += `
+      <div class="category-group level-${level}">
+        <div class="category-header flex items-center justify-between p-4 rounded-lg cursor-pointer hover:bg-muted/50 transition-colors" data-category="${node.fullName}">
+          <div class="flex items-center gap-3">
+            ${hasChildren || hasPosts ? `
+              <button class="category-toggle p-1 hover:bg-muted rounded transition-colors">
+                <svg class="w-4 h-4 chevron text-foreground/40 transition-transform" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                  <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7" />
+                </svg>
+              </button>
+            ` : '<div class="w-6"></div>'}
+            <svg class="w-5 h-5 text-primary-500" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M3 7v10a2 2 0 002 2h14a2 2 0 002-2V9a2 2 0 00-2-2h-6l-2-2H5a2 2 0 00-2 2z" />
+            </svg>
+            <span class="font-medium">${node.name}</span>
+          </div>
+          <span class="text-sm text-foreground/40 bg-muted px-2.5 py-1 rounded-full">
+            ${node.count} 篇
+          </span>
+        </div>
+    `;
+  }
+  
+  // 子内容
+  if (hasChildren || hasPosts) {
+    const paddingClass = node.name === 'root' ? '' : 'category-content hidden';
+    html += `<div class="${paddingClass}">`;
+    
+    // 文章列表
+    if (hasPosts) {
+      html += `<div class="post-list py-2">`;
+      node.posts.sort((a, b) => b.data.pubDate.valueOf() - a.data.pubDate.valueOf()).forEach((post) => {
+        const slug = post.slug || post.id;
+        html += `
+          <a href="/blog/${slug}" class="post-item flex items-center justify-between px-4 py-3 rounded-lg hover:bg-muted/30 transition-colors">
+            <span class="text-foreground/80 hover:text-primary-500 transition-colors">${post.data.title}</span>
+            <span class="text-xs text-foreground/40">${formatDate(post.data.pubDate)}</span>
+          </a>
+        `;
+      });
+      html += `</div>`;
+    }
+    
+    // 子分类
+    sortedChildren.forEach((child) => {
+      html += renderCategoryNode(child, level + 1);
+    });
+    
+    html += `</div>`;
+  }
+  
+  if (node.name !== 'root') {
+    html += `</div>`;
+  }
+  
+  return html;
+}
+---
+
+<BaseLayout title="分类 - NovaBlog">
+  <div class="py-12">
+    <div class="content-width">
+      <div class="text-center mb-12">
+        <h1 class="text-3xl md:text-4xl font-bold mb-4">文章分类</h1>
+        <p class="text-foreground/60">
+          共 {totalCategories} 个分类，{allPosts.length} 篇文章
+        </p>
+      </div>
+
+      {categoryTree.children.size > 0 || categoryTree.posts.length > 0 ? (
+        <div class="max-w-3xl mx-auto">
+          <!-- 未分类文章 -->
+          {categoryTree.posts.length > 0 && (
+            <div class="category-group mb-6">
+              <div class="category-header flex items-center justify-between p-4 bg-muted/30 rounded-lg">
+                <div class="flex items-center gap-3">
+                  <svg class="w-5 h-5 text-foreground/40" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
+                  </svg>
+                  <span class="font-medium">未分类</span>
+                </div>
+                <span class="text-sm text-foreground/40 bg-muted px-2 py-1 rounded-full">
+                  {categoryTree.posts.length} 篇
+                </span>
+              </div>
+            </div>
+          )}
+
+          <!-- 分类列表 -->
+          <div class="category-tree" set:html={renderCategoryNode(categoryTree, 0)} />
+        </div>
+      ) : (
+        <div class="text-center py-16 text-foreground/40">
+          <svg class="w-16 h-16 mx-auto mb-4 opacity-50" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5" d="M19 11H5m14 0a2 2 0 012 2v6a2 2 0 01-2 2H5a2 2 0 01-2-2v-6a2 2 0 012-2m14 0V9a2 2 0 00-2-2M5 11V9a2 2 0 012-2m0 0V5a2 2 0 012-2h6a2 2 0 012 2v2M7 7h10" />
+          </svg>
+          <p>暂无分类</p>
+        </div>
+      )}
+    </div>
+  </div>
+</BaseLayout>
+
+<script>
+  // 客户端交互：折叠/展开分类
+  document.addEventListener('DOMContentLoaded', () => {
+    document.querySelectorAll('.category-header').forEach((header) => {
+      header.addEventListener('click', (e) => {
+        const target = e.target as HTMLElement;
+        // 只有点击头部或按钮时才切换
+        if (target.closest('.post-item')) return;
+        
+        const group = header.closest('.category-group');
+        const content = group?.querySelector('.category-content') as HTMLElement;
+        const chevron = header.querySelector('.chevron');
+        
+        if (content) {
+          content.classList.toggle('hidden');
+          chevron?.classList.toggle('rotate-90');
+        }
+      });
+    });
+  });
+</script>
+
+<style>
+  .category-group {
+    margin-bottom: 0.5rem;
+  }
+
+  .category-header {
+    transition: all 0.2s;
+    user-select: none;
+  }
+
+  .category-header:hover {
+    background: var(--muted);
+  }
+
+  .category-content {
+    margin-left: 1.5rem;
+    border-left: 2px solid var(--border);
+    padding-left: 1rem;
+    margin-top: 0.5rem;
+  }
+
+  .chevron {
+    transition: transform 0.2s;
+  }
+
+  .post-item {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    text-decoration: none;
+  }
+
+  .level-0 > .category-header {
+    background: var(--muted);
+  }
+
+  .level-1 > .category-header {
+    background: color-mix(in srgb, var(--muted) 50%, transparent);
+  }
+
+  .level-2 > .category-header {
+    background: color-mix(in srgb, var(--muted) 30%, transparent);
+  }
+</style>

src/pages/tags/index.astro

@@ -17,26 +17,72 @@ allPosts.forEach((post) => {
 
 // 按文章数量排序
 const sortedTags = [...tagMap.entries()].sort((a, b) => b[1] - a[1]);
+
+// 计算字体大小（基于文章数量）
+const maxCount = Math.max(...tagMap.values(), 1);
+const minCount = Math.min(...tagMap.values(), 1);
+
+function getFontSize(count: number): string {
+  // 字体大小范围：0.875rem 到 2.5rem
+  const minSize = 0.875;
+  const maxSize = 2.5;
+  
+  if (maxCount === minCount) {
+    return `${(minSize + maxSize) / 2}rem`;
+  }
+  
+  const scale = (count - minCount) / (maxCount - minCount);
+  const size = minSize + scale * (maxSize - minSize);
+  return `${size}rem`;
+}
+
+function getOpacity(count: number): number {
+  // 透明度范围：0.6 到 1
+  if (maxCount === minCount) return 0.8;
+  const scale = (count - minCount) / (maxCount - minCount);
+  return 0.6 + scale * 0.4;
+}
+
+// 随机颜色类
+const colorClasses = [
+  'text-primary-500',
+  'text-blue-500',
+  'text-purple-500',
+  'text-pink-500',
+  'text-indigo-500',
+  'text-cyan-500',
+  'text-teal-500',
+  'text-emerald-500',
+];
+
+function getRandomColor(index: number): string {
+  return colorClasses[index % colorClasses.length];
+}
 ---
 
-<BaseLayout title="标签 - NovaBlog">
+<BaseLayout title="标签云 - NovaBlog">
   <div class="py-12">
     <div class="content-width">
       <div class="text-center mb-12">
-        <h1 class="text-3xl md:text-4xl font-bold mb-4">标签</h1>
+        <h1 class="text-3xl md:text-4xl font-bold mb-4">标签云</h1>
-        <p class="text-foreground/60">按标签浏览文章</p>
+        <p class="text-foreground/60">
+          共 {sortedTags.length} 个标签，{allPosts.length} 篇文章
+        </p>
       </div>
 
       {sortedTags.length > 0 ? (
-        <div class="max-w-2xl mx-auto">
+        <div class="tag-cloud">
-          <div class="flex flex-wrap justify-center gap-4">
+          <div class="flex flex-wrap justify-center items-center gap-x-4 gap-y-6 max-w-4xl mx-auto px-4">
-            {sortedTags.map(([tag, count]) => (
+            {sortedTags.map(([tag, count], index) => (
               <a
                 href={`/tags/${tag}`}
-                class="card px-6 py-4 flex items-center gap-3 hover:border-primary-500 transition-colors"
+                class="tag-item hover:scale-110 transition-transform duration-300"
+                style={`font-size: ${getFontSize(count)}; opacity: ${getOpacity(count)}`}
               >
-                <span class="text-lg font-medium">#{tag}</span>
+                <span class={`font-medium ${getRandomColor(index)}`}>
-                <span class="text-sm text-foreground/40">{count} 篇文章</span>
+                  #{tag}
+                </span>
+                <span class="text-xs text-foreground/40 ml-1">({count})</span>
               </a>
             ))}
           </div>
@@ -49,6 +95,37 @@ const sortedTags = [...tagMap.entries()].sort((a, b) => b[1] - a[1]);
           <p>暂无标签</p>
         </div>
       )}
+
+      <!-- 图例说明 -->
+      <div class="mt-16 text-center">
+        <div class="inline-flex items-center gap-6 text-sm text-foreground/40">
+          <span>字体大小 = 文章数量</span>
+          <span>|</span>
+          <span>点击标签查看相关文章</span>
+        </div>
+      </div>
     </div>
   </div>
-</BaseLayout>
+</BaseLayout>
+
+<style>
+  .tag-cloud {
+    min-height: 300px;
+    background: linear-gradient(135deg, transparent 0%, var(--muted) 100%);
+    border-radius: 16px;
+    padding: 3rem 1rem;
+  }
+
+  .tag-item {
+    display: inline-flex;
+    align-items: baseline;
+    text-decoration: none;
+    line-height: 1.2;
+    white-space: nowrap;
+  }
+
+  .tag-item:hover {
+    text-decoration: underline;
+    text-underline-offset: 4px;
+  }
+</style>