feat(web): 桌面登录页记住密码/自动登录与版本更新，首页版本更新入口与背景修复

- 登录页(仅桌面端)新增"记住密码/自动登录"勾选与"更新版本"按钮：登录成功持久化凭据
  (base64 存桌面 localStorage)，打开登录页恢复勾选并静默登录；显式登出/切号后关闭自动登录
- 新增 shared/composables/useVersionUpdate 统一版本检测：/api/version/latest 与本机版本比较，
  通过 pywebview 桥 get_app_version 读本地 exe 版本，缺桥时降级为可手动更新
- 首页保留 ↻ 图标并加显式"更新版本"按钮，接入新检测逻辑
- 首页背景改画到 .home-root，避免被 SPA 全局样式时序覆盖导致图不显示

frontend-vue/src/pages/home/DesktopHomePage.vue

@@ -10,18 +10,24 @@
           title="检测更新"
           @click="toggleUpdatePanel"
         >↻</button>
+        <button
+          v-if="isDesktopRuntime"
+          type="button"
+          class="header-update-text"
+          @click="toggleUpdatePanel"
+        >更新版本</button>
         <div class="header-update-panel" v-show="updatePanel">
           <div class="header-update-title"><span>↻</span> 软件更新</div>
           <div class="update-block">
-            <span class="update-version-text">当前版本: {{ versionText }}</span>
-            <button type="button" class="btn-check-update" @click="checkUpdate">
-              <span>↻</span> 检测
+            <span class="update-version-text">当前版本: {{ currentVersion || '未知' }}</span>
+            <button type="button" class="btn-check-update" :disabled="checking" @click="runCheck">
+              <span>↻</span> {{ checking ? '检测中...' : '检测' }}
             </button>
           </div>
-          <div class="update-hint">{{ updateHint }}</div>
-          <div style="margin-top: 4px;">
-            <button type="button" class="btn-download-update" v-if="updateReady" @click="doUpdate">
-              立即更新
+          <div class="update-hint">{{ hint }}</div>
+          <div v-if="hasUpdate || canDownload" style="margin-top: 4px;">
+            <button type="button" class="btn-download-update" :disabled="updating" @click="doUpdate">
+              {{ updating ? '更新中...' : '立即更新' }}
             </button>
           </div>
         </div>
@@ -64,16 +70,15 @@
 import { computed, onMounted, ref, watch } from 'vue'
 import { restoreLoginUser } from '@/shared/auth/ensure-auth'
 import { getCurrentUserAppColumnRaw, type PermissionMenuItem } from '@/shared/api/permission'
-import { getPywebviewApi, isDesktopRuntime } from '@/shared/bridges/pywebview'
+import { isDesktopRuntime } from '@/shared/bridges/pywebview'
+import { useVersionUpdate } from '@/shared/composables/useVersionUpdate'
 import { resolvePageHref } from '@/shared/page-prefix'
 
 const username = ref('')
-const versionText = ref('—')
 const updatePanel = ref(false)
-const updateHint = ref('')
-const updateReady = ref(false)
-const updateFileUrl = ref('')
 const toastText = ref('')
+const { checking, updating, currentVersion, hasUpdate, canDownload, hint, checked, runCheck, doUpdate } =
+  useVersionUpdate()
 
 // 桌面端原 Flask /logout 已随瘦身下线：统一跳登录页并清本地 token（/login?logout=1）
 const logoutHref = computed(() => `${resolvePageHref('/new_web_source/login.html')}?logout=1`)
@@ -162,69 +167,21 @@ async function loadCurrentUser() {
 
 function toggleUpdatePanel() {
   updatePanel.value = !updatePanel.value
-}
-
-async function fetchVersion() {
-  try {
-    const resp = await window.fetch('/api/version', { credentials: 'same-origin' })
-    const data = await resp.json().catch(() => ({}))
-    const current = String((data && data.version) || '').replace(/^v/i, '')
-    if (current) versionText.value = current || '—'
-    return data || {}
-  } catch {
-    return {}
-  }
-}
-
-async function checkUpdate() {
-  updateHint.value = '正在检测更新...'
-  updateReady.value = false
-  try {
-    const data = await fetchVersion()
-    if (data.has_update && data.latest_version) {
-      updateHint.value =
-        `发现新版本 v${String(data.latest_version).replace(/^v/i, '')}` +
-        (data.desc ? `：${data.desc}` : '')
-      if (data.file_url) {
-        updateReady.value = true
-        updateFileUrl.value = data.file_url
-      } else {
-        updateHint.value = '暂无下载地址，请关注官方渠道。'
-      }
-    } else {
-      updateHint.value = '已是最新版本'
-    }
-  } catch {
-    updateHint.value = '检测更新失败'
-  }
-}
-
-async function doUpdate() {
-  if (!updateFileUrl.value) return
-  if (!window.confirm('有更新，是否现在更新？\n更新将下载安装包并重启程序。')) return
-  updateHint.value = '正在下载并准备更新，程序将自动退出...'
-  updateReady.value = false
-  try {
-    // 版本更新是桌面客户端专属动作：经浏览器桥调用本地 update 下载/启动（服务端化后无 /api/update/do）
-    const bridge = getPywebviewApi()
-    const result = bridge?.do_update_app ? await bridge.do_update_app(updateFileUrl.value) : undefined
-    updateHint.value = result?.success
-      ? '更新已启动，程序即将退出...'
-      : (result?.error || '当前环境不支持自动更新')
-  } catch {
-    updateHint.value = '请求更新失败，请重试'
+  // 首次展开面板即触发一次检测（版本逻辑在 shared/composables/useVersionUpdate）
+  if (updatePanel.value && !checked.value && !checking.value) {
+    void runCheck()
   }
 }
 
 onMounted(() => {
   void loadCurrentUser()
   void loadPermissions()
-  // 版本检测/更新仅桌面客户端（本地 Flask image 蓝图）提供；桌面桥注入后立即拉取
+  // 版本检测/更新仅桌面客户端：桌面桥注入后立即检测一次（逻辑见 useVersionUpdate）
   watch(
     isDesktopRuntime,
     (runtime) => {
       if (runtime) {
-        void fetchVersion().catch(() => undefined)
+        void runCheck()
       }
     },
     { immediate: true },
@@ -247,7 +204,10 @@ body {
 }
 
 .home-root {
+  /* 背景直接落到根容器，避免依赖 body 被 SPA 全局样式覆盖导致图不显示 */
   min-height: 100vh;
+  background: linear-gradient(rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0.5)),
+    url("/bg.jpg") center/cover no-repeat;
   display: flex;
   flex-direction: column;
   align-items: center;
@@ -316,6 +276,21 @@ body {
   background: rgba(102, 126, 234, 0.2);
 }
 
+.header-update-text {
+  padding: 5px 12px;
+  font-size: 13px;
+  color: #4c5bd4;
+  background: rgba(102, 126, 234, 0.12);
+  border: 1px solid rgba(102, 126, 234, 0.35);
+  border-radius: 14px;
+  cursor: pointer;
+  white-space: nowrap;
+}
+
+.header-update-text:hover {
+  background: rgba(102, 126, 234, 0.2);
+}
+
 .header-update-panel {
   position: absolute;
   top: 44px;

frontend-vue/src/pages/login/DesktopLoginPage.vue

@@ -43,29 +43,140 @@
             </button>
           </div>
         </div>
+        <!-- 记住密码 / 自动登录：仅桌面客户端提供（网页浏览器访问不存密码，见需求） -->
+        <div v-if="isDesktopRuntime" class="login-options">
+          <label class="check-label">
+            <input type="checkbox" class="check-input" v-model="rememberPassword" />
+            <span>记住密码</span>
+          </label>
+          <label class="check-label">
+            <input type="checkbox" class="check-input" v-model="autoLogin" />
+            <span>自动登录</span>
+          </label>
+        </div>
         <button type="submit" class="btn-login" id="btnLogin" :disabled="loggingIn">
           {{ loggingIn ? '登录中...' : '登录' }}
         </button>
       </form>
+
+      <!-- 版本更新（桌面端检测线上版本并下载更新包，对齐旧版客户端入口） -->
+      <div v-if="isDesktopRuntime" class="login-update">
+        <button type="button" class="link-update" @click="toggleUpdate">
+          <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
+            <path d="M21 12a9 9 0 1 1-2.64-6.36"></path>
+            <path d="M21 3v6h-6"></path>
+          </svg>
+          更新版本
+        </button>
+        <div v-if="updateOpen" class="update-panel">
+          <div class="update-panel-title">软件更新</div>
+          <div class="update-row"><span>当前版本</span><b>{{ currentVersion || '—' }}</b></div>
+          <div class="update-row"><span>最新版本</span><b>{{ latestVersion || '—' }}</b></div>
+          <div class="update-actions">
+            <button type="button" class="btn-mini" :disabled="checking" @click="runCheck">
+              {{ checking ? '检测中...' : '检测' }}
+            </button>
+            <button
+              v-if="hasUpdate || canDownload"
+              type="button"
+              class="btn-mini btn-mini-green"
+              :disabled="updating"
+              @click="doUpdate"
+            >
+              {{ updating ? '更新中...' : '立即更新' }}
+            </button>
+          </div>
+          <div class="update-hint">{{ hint }}</div>
+        </div>
+      </div>
     </div>
   </div>
 </template>
 
 <script setup lang="ts">
-import { onMounted, ref } from 'vue'
+import { onMounted, ref, watch } from 'vue'
 import { useRouter } from 'vue-router'
 import { loginWithDevice } from '@/shared/api/user'
+import { isDesktopRuntime } from '@/shared/bridges/pywebview'
+import { useVersionUpdate } from '@/shared/composables/useVersionUpdate'
 
 const router = useRouter()
 
 const AUTH_TOKEN_KEY = 'aiimage_auth_token'
 const DEVICE_ID_KEY = 'aiimage_device_id'
 
+const REMEMBER_USER_KEY = 'aiimage_remember_user'
+const REMEMBER_PWD_KEY = 'aiimage_remember_pwd'
+const AUTO_LOGIN_KEY = 'aiimage_auto_login'
+
 const username = ref('')
 const password = ref('')
 const passwordVisible = ref(false)
 const loggingIn = ref(false)
 const errorMessage = ref('')
+const rememberPassword = ref(false)
+const autoLogin = ref(false)
+const updateOpen = ref(false)
+
+// 版本检测 / 更新：登录页与首页共用逻辑
+const {
+  checking,
+  updating,
+  currentVersion,
+  latestVersion,
+  hasUpdate,
+  canDownload,
+  hint,
+  checked,
+  runCheck,
+  doUpdate,
+} = useVersionUpdate()
+
+function b64Encode(value: string): string {
+  try {
+    return btoa(unescape(encodeURIComponent(value)))
+  } catch {
+    return ''
+  }
+}
+
+function b64Decode(value: string): string {
+  if (!value) return ''
+  try {
+    return decodeURIComponent(escape(atob(value)))
+  } catch {
+    return ''
+  }
+}
+
+function lsGet(key: string): string {
+  try {
+    return window.localStorage.getItem(key) || ''
+  } catch {
+    return ''
+  }
+}
+
+function lsSet(key: string, value: string) {
+  try {
+    window.localStorage.setItem(key, value)
+  } catch {
+    /* 忽略 localStorage 异常 */
+  }
+}
+
+function lsRemove(key: string) {
+  try {
+    window.localStorage.removeItem(key)
+  } catch {
+    /* 忽略 */
+  }
+}
+
+function hasLogoutParam(): boolean {
+  const params = new URLSearchParams(window.location.search || '')
+  return params.get('logout') === '1' || params.get('switch') === '1'
+}
 
 function togglePassword() {
   passwordVisible.value = !passwordVisible.value
@@ -121,6 +232,45 @@ async function fetchDeviceId(): Promise<string> {
   return makeBrowserDeviceId()
 }
 
+/** 登录成功后按勾选状态持久化账号凭据（仅桌面端登录页可勾选，密码 base64 简单编码） */
+function saveCredentials(account: string) {
+  if (!rememberPassword.value) {
+    lsRemove(REMEMBER_USER_KEY)
+    lsRemove(REMEMBER_PWD_KEY)
+    lsRemove(AUTO_LOGIN_KEY)
+    return
+  }
+  lsSet(REMEMBER_USER_KEY, account)
+  lsSet(REMEMBER_PWD_KEY, b64Encode(password.value))
+  lsSet(AUTO_LOGIN_KEY, autoLogin.value ? '1' : '0')
+}
+
+/** 打开登录页时恢复记住的账号/勾选状态 */
+function loadCredentials() {
+  const account = lsGet(REMEMBER_USER_KEY)
+  const pwd = b64Decode(lsGet(REMEMBER_PWD_KEY))
+  if (account) username.value = account
+  if (pwd) password.value = pwd
+  const auto = lsGet(AUTO_LOGIN_KEY) === '1'
+  autoLogin.value = auto
+  rememberPassword.value = auto || Boolean(pwd)
+}
+
+/** 打开登录页即用记住的凭据静默登录（登出/切号导航除外） */
+function tryAutoLogin() {
+  if (hasLogoutParam()) return
+  if (!autoLogin.value) return
+  if (!username.value || !lsGet(REMEMBER_PWD_KEY)) return
+  void submitLogin()
+}
+
+function toggleUpdate() {
+  updateOpen.value = !updateOpen.value
+  if (updateOpen.value && !checked.value && !checking.value) {
+    void runCheck()
+  }
+}
+
 async function submitLogin() {
   if (loggingIn.value) return
   const account = username.value.trim()
@@ -164,6 +314,10 @@ async function submitLogin() {
         /* 忽略 */
       }
     }
+    // 登录成功即持久化记住/自动登录凭据（桌面端专属勾选）
+    if (isDesktopRuntime.value) {
+      saveCredentials(account)
+    }
     // 桌面端 Flask cookie 同步已随瘦身下线：登录态只存 localStorage（JWT 走 Bearer），无 cookie 依赖
     clearAppPermissionCaches()
     // SPA：登录成功后经路由回首页（URL 无 .html 后缀，见 src/router）
@@ -186,7 +340,29 @@ onMounted(() => {
     } catch {
       /* 忽略 */
     }
+    // 显式登出/切号后不再自动登录（保留记住的账号，仅关闭自动登录）
+    autoLogin.value = false
+    lsSet(AUTO_LOGIN_KEY, '0')
   }
+
+  // 桌面桥注入完成后再恢复凭据/自动登录（isDesktopRuntime 在 pywebviewready 后置 true）
+  watch(
+    isDesktopRuntime,
+    (runtime) => {
+      if (!runtime) return
+      loadCredentials()
+      tryAutoLogin()
+    },
+    { immediate: true },
+  )
+})
+
+// 勾选自动登录时隐含记住密码（自动登录依赖已存密码）；反之取消记住密码则取消自动登录
+watch(autoLogin, (checkedValue) => {
+  if (checkedValue) rememberPassword.value = true
+})
+watch(rememberPassword, (checkedValue) => {
+  if (!checkedValue) autoLogin.value = false
 })
 </script>
 
@@ -233,6 +409,7 @@ body {
 }
 
 .login-box {
+  position: relative;
   background: #fff;
   border: 1px solid #b8d4e3;
   border-radius: 12px;
@@ -332,6 +509,32 @@ body {
   text-align: center;
 }
 
+/* 记住密码 / 自动登录 */
+.login-options {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 16px;
+  margin: -4px 0 16px;
+}
+
+.check-label {
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  font-size: 13px;
+  color: #555;
+  cursor: pointer;
+  user-select: none;
+}
+
+.check-input {
+  width: 15px;
+  height: 15px;
+  accent-color: #3498db;
+  cursor: pointer;
+}
+
 .btn-login {
   width: 100%;
   padding: 14px;
@@ -353,4 +556,104 @@ body {
   opacity: 0.6;
   cursor: not-allowed;
 }
+
+/* 版本更新入口与面板 */
+.login-update {
+  margin-top: 14px;
+  text-align: center;
+}
+
+.link-update {
+  display: inline-flex;
+  align-items: center;
+  gap: 5px;
+  padding: 4px 8px;
+  font-size: 13px;
+  color: #71808d;
+  background: transparent;
+  border: 1px solid transparent;
+  border-radius: 8px;
+  cursor: pointer;
+}
+
+.link-update svg {
+  width: 14px;
+  height: 14px;
+}
+
+.link-update:hover {
+  color: #3498db;
+  background: #f1f7fb;
+  border-color: #d5e6f2;
+}
+
+.update-panel {
+  margin-top: 10px;
+  padding: 12px 14px;
+  background: #f6fafd;
+  border: 1px solid #d5e6f2;
+  border-radius: 8px;
+  text-align: left;
+}
+
+.update-panel-title {
+  font-size: 13px;
+  font-weight: 600;
+  color: #333;
+  margin-bottom: 8px;
+}
+
+.update-row {
+  display: flex;
+  justify-content: space-between;
+  gap: 12px;
+  font-size: 13px;
+  color: #555;
+  line-height: 1.7;
+}
+
+.update-row b {
+  font-weight: 600;
+  color: #333;
+}
+
+.update-actions {
+  display: flex;
+  gap: 10px;
+  margin-top: 10px;
+}
+
+.btn-mini {
+  padding: 5px 12px;
+  font-size: 13px;
+  color: #fff;
+  background: #3498db;
+  border: none;
+  border-radius: 6px;
+  cursor: pointer;
+}
+
+.btn-mini:hover:not(:disabled) {
+  opacity: 0.9;
+}
+
+.btn-mini:disabled {
+  opacity: 0.6;
+  cursor: not-allowed;
+}
+
+.btn-mini-green {
+  background: #28a745;
+}
+
+.btn-mini-green:hover:not(:disabled) {
+  opacity: 0.9;
+}
+
+.update-hint {
+  font-size: 12px;
+  color: #666;
+  margin-top: 8px;
+  min-height: 16px;
+}
 </style>

frontend-vue/src/shared/bridges/pywebview.ts

@@ -135,6 +135,8 @@ export interface PywebviewApi {
   open_external_url?: (url: string) => Promise<{ success: boolean; error?: string }>;
   /** 版本更新（桌面专属）：下载更新包并启动 update.exe 后退出主程序（原 Flask /api/update/do 桥化） */
   do_update_app?: (fileUrl: string) => Promise<{ success: boolean; error?: string }>;
+  /** 桌面客户端本地版本号（与 /api/version/latest 比较检测更新；新版客户端提供） */
+  get_app_version?: () => Promise<{ success: boolean; version?: string; error?: string }>;
   launch_yaoayanui?: () => Promise<{
     success: boolean;
     path?: string;

frontend-vue/src/shared/composables/useVersionUpdate.ts

@@ -0,0 +1,144 @@
+/**
+ * 版本检测 / 更新共享逻辑（登录页、首页共用）
+ *
+ * 服务端化后桌面页面直载线上 Web：检测"是否有新版"需把线上 /api/version/latest
+ * 与"本机 exe 版本"比较。本机版本经 pywebview 桥 get_app_version() 获取（新版客户端
+ * 提供）；旧客户端无此桥时降级：本机版本为空 → 只要线上有包就允许手动更新。
+ */
+
+import { ref } from 'vue'
+import { getPywebviewApi } from '@/shared/bridges/pywebview'
+
+function normVersion(value: unknown): string {
+  return String(value ?? '').trim().replace(/^[vV]/, '')
+}
+
+async function fetchJson(url: string): Promise<Record<string, unknown>> {
+  const resp = await window.fetch(url, { credentials: 'same-origin' })
+  if (!resp.ok) throw new Error(`HTTP ${resp.status}`)
+  const text = await resp.text()
+  if (!text) return {}
+  try {
+    return JSON.parse(text) as Record<string, unknown>
+  } catch {
+    return {}
+  }
+}
+
+/**
+ * 读取本机客户端版本号：优先桌面桥；无桥（旧版 exe / 浏览器环境）返回空串。
+ */
+export async function resolveLocalVersion(): Promise<string> {
+  const bridge = getPywebviewApi()
+  if (bridge?.get_app_version) {
+    try {
+      const res = await bridge.get_app_version()
+      if (res?.success && res.version) {
+        return normVersion(res.version)
+      }
+    } catch {
+      /* 忽略，走空版本降级 */
+    }
+  }
+  return ''
+}
+
+/** 拉取线上最新客户端版本（公开接口，无需登录；web_config 无记录时 version 为空）。 */
+export async function fetchLatestVersion(): Promise<{ version: string; fileUrl: string }> {
+  const data = await fetchJson('/api/version/latest')
+  return { version: normVersion(data.version), fileUrl: String(data.file_url ?? '') }
+}
+
+export function useVersionUpdate() {
+  const checking = ref(false)
+  const updating = ref(false)
+  const currentVersion = ref('')
+  const latestVersion = ref('')
+  const fileUrl = ref('')
+  const hasUpdate = ref(false)
+  /** 本地版本未知但线上有包时也允许"立即更新"，此标志标记可下载 */
+  const canDownload = ref(false)
+  const hint = ref('')
+  const checked = ref(false)
+
+  async function loadCurrentVersion() {
+    if (currentVersion.value) return
+    currentVersion.value = await resolveLocalVersion()
+  }
+
+  async function runCheck() {
+    if (checking.value) return
+    checking.value = true
+    hint.value = '正在检测更新...'
+    try {
+      const local = await resolveLocalVersion()
+      currentVersion.value = local
+      const latest = await fetchLatestVersion()
+      latestVersion.value = latest.version
+      fileUrl.value = latest.fileUrl
+      checked.value = true
+
+      if (!latest.version) {
+        hasUpdate.value = false
+        canDownload.value = false
+        hint.value = '暂无版本更新信息'
+        return
+      }
+      if (!local) {
+        // 旧客户端无本机版本桥：无法精确比较，线上有包即可手动更新
+        hasUpdate.value = false
+        canDownload.value = Boolean(latest.fileUrl)
+        hint.value = latest.fileUrl
+          ? `线上最新版本 v${latest.version}，可点击下方按钮手动更新`
+          : `线上最新版本 v${latest.version}，暂无下载地址`
+        return
+      }
+      hasUpdate.value = local !== latest.version
+      canDownload.value = hasUpdate.value && Boolean(latest.fileUrl)
+      hint.value = hasUpdate.value
+        ? `发现新版本 v${latest.version}${latest.fileUrl ? '' : '，暂无下载地址'}`
+        : `已是最新版本 v${local}`
+    } catch {
+      hasUpdate.value = false
+      canDownload.value = false
+      hint.value = '检测更新失败，请稍后重试'
+    } finally {
+      checking.value = false
+    }
+  }
+
+  async function doUpdate() {
+    if (updating.value || !fileUrl.value) return
+    if (!window.confirm('有更新，是否现在更新？\n更新将下载安装包并重启程序。')) return
+    updating.value = true
+    hint.value = '正在下载并准备更新，程序将自动退出...'
+    try {
+      const bridge = getPywebviewApi()
+      const result = bridge?.do_update_app
+        ? await bridge.do_update_app(fileUrl.value)
+        : undefined
+      hint.value = result?.success
+        ? '更新已启动，程序即将退出...'
+        : (result?.error || '当前环境不支持自动更新')
+    } catch {
+      hint.value = '请求更新失败，请重试'
+    } finally {
+      updating.value = false
+    }
+  }
+
+  return {
+    checking,
+    updating,
+    currentVersion,
+    latestVersion,
+    fileUrl,
+    hasUpdate,
+    canDownload,
+    hint,
+    checked,
+    loadCurrentVersion,
+    runCheck,
+    doUpdate,
+  }
+}