feat: 添加版本号显示和自动构建/删除 Docker 镜像功能

- 添加前端版本号显示（桌面端和移动端）
- 实现 GitHub Actions 自动构建和推送 Docker 镜像
- 实现删除 release 时自动删除对应 Docker 镜像
- 支持版本号格式：v数字.数字.数字 或 v数字.数字.数字-后缀
- 添加版本号管理文档
- 更新 Dockerfile 和部署脚本支持版本号构建参数

frontend/src/components/Layout.tsx

@@ -23,7 +23,7 @@ import {
 } from '@ant-design/icons'
 import type { MenuProps } from 'antd'
 import type { ReactNode } from 'react'
-import { removeToken } from '../utils'
+import { removeToken, getVersionText, getGitHubTagUrl } from '../utils'
 import { wsManager } from '../services/websocket'
 import Logo from './Logo'
 
@@ -200,10 +200,33 @@ const Layout: React.FC<LayoutProps> = ({ children }) => {
           alignItems: 'center',
           justifyContent: 'space-between'
         }}>
-          <Logo 
-            size="normal" 
-            darkMode={true}
-          />
+          <div style={{ display: 'flex', alignItems: 'center', gap: '6px' }}>
+            <Logo 
+              size="normal" 
+              darkMode={true}
+            />
+            <a
+              href={getGitHubTagUrl()}
+              target="_blank"
+              rel="noopener noreferrer"
+              onClick={(e) => {
+                const version = getVersionText()
+                if (version === 'dev') {
+                  e.preventDefault()
+                }
+              }}
+              style={{
+                color: 'rgba(255, 255, 255, 0.7)',
+                fontSize: '12px',
+                fontWeight: 'normal',
+                textDecoration: 'none',
+                cursor: getVersionText() === 'dev' ? 'default' : 'pointer'
+              }}
+              title={getVersionText() === 'dev' ? '' : '查看版本发布'}
+            >
+              v{getVersionText()}
+            </a>
+          </div>
           <div style={{ display: 'flex', alignItems: 'center', gap: '8px' }}>
             <a
               href="https://github.com/WrBug/PolyHermes"
@@ -292,9 +315,36 @@ const Layout: React.FC<LayoutProps> = ({ children }) => {
             fontSize: '18px',
             fontWeight: 'bold',
             marginBottom: '12px',
-            textAlign: 'center'
+            textAlign: 'center',
+            display: 'flex',
+            alignItems: 'flex-end',
+            justifyContent: 'center',
+            gap: '6px'
           }}>
-            PolyHermes
+            <span>PolyHermes</span>
+            <a
+              href={getGitHubTagUrl()}
+              target="_blank"
+              rel="noopener noreferrer"
+              onClick={(e) => {
+                const version = getVersionText()
+                if (version === 'dev') {
+                  e.preventDefault()
+                }
+              }}
+              style={{
+                color: 'rgba(255, 255, 255, 0.7)',
+                fontSize: '12px',
+                fontWeight: 'normal',
+                textDecoration: 'none',
+                cursor: getVersionText() === 'dev' ? 'default' : 'pointer',
+                lineHeight: '1',
+                paddingBottom: '2px'
+              }}
+              title={getVersionText() === 'dev' ? '' : '查看版本发布'}
+            >
+              v{getVersionText()}
+            </a>
           </div>
           <div style={{ 
             display: 'flex', 

frontend/src/utils/index.ts

@@ -45,3 +45,10 @@ export {
   hasToken
 } from './auth'
 
+// 统一导出 version 相关工具函数
+export {
+  getVersionInfo,
+  getVersionText,
+  getGitHubTagUrl
+} from './version'
+

frontend/src/utils/version.ts

@@ -0,0 +1,52 @@
+/**
+ * 版本号配置
+ * 在构建时通过环境变量注入
+ */
+export interface VersionInfo {
+  version: string
+  gitTag: string
+  githubRepoUrl: string
+}
+
+/**
+ * 获取版本信息
+ * 从 window.__VERSION__ 或环境变量中读取
+ */
+export const getVersionInfo = (): VersionInfo => {
+  // 优先从 window.__VERSION__ 读取（构建时注入）
+  const windowVersion = window.__VERSION__
+  if (windowVersion) {
+    return {
+      version: windowVersion.version || 'dev',
+      gitTag: windowVersion.gitTag || '',
+      githubRepoUrl: windowVersion.githubRepoUrl || 'https://github.com/WrBug/PolyHermes'
+    }
+  }
+  
+  // 从环境变量读取（开发环境）
+  return {
+    version: import.meta.env.VITE_APP_VERSION || 'dev',
+    gitTag: import.meta.env.VITE_APP_GIT_TAG || '',
+    githubRepoUrl: import.meta.env.VITE_APP_GITHUB_REPO_URL || 'https://github.com/WrBug/PolyHermes'
+  }
+}
+
+/**
+ * 获取版本号显示文本
+ */
+export const getVersionText = (): string => {
+  const info = getVersionInfo()
+  return info.version
+}
+
+/**
+ * 获取 GitHub tag 页面 URL
+ */
+export const getGitHubTagUrl = (): string => {
+  const info = getVersionInfo()
+  if (info.gitTag) {
+    return `${info.githubRepoUrl}/releases/tag/${info.gitTag}`
+  }
+  return info.githubRepoUrl
+}
+

frontend/src/vite-env.d.ts

@@ -3,9 +3,21 @@
 interface ImportMetaEnv {
   readonly VITE_API_URL?: string
   readonly VITE_WS_URL?: string
+  readonly VITE_APP_VERSION?: string
+  readonly VITE_APP_GIT_TAG?: string
+  readonly VITE_APP_GITHUB_REPO_URL?: string
 }
 
 interface ImportMeta {
   readonly env: ImportMetaEnv
 }
 
+// 版本号全局变量类型定义
+interface Window {
+  __VERSION__?: {
+    version: string
+    gitTag: string
+    githubRepoUrl: string
+  }
+}
+