diff --git a/frontend/src/App.vue b/frontend/src/App.vue
index f56c012e..cbe00f2c 100644
--- a/frontend/src/App.vue
+++ b/frontend/src/App.vue
@@ -1,5 +1,19 @@
 <script setup lang="ts">
+import { onMounted } from 'vue'
 import AppLayout from './layout/AppLayout.vue'
+import { useSettingsStore } from '@/stores/settings'
+import { useAppearance } from '@/composables/useAppearance'
+import { setLocale } from '@/i18n'
+
+// 启动后从后端 /api/settings hydrate(权威源,覆盖 main.ts 的 localStorage 初值,跨设备一致)。
+// load(false) 应用主题不回写、setLocale 仅本地不 PUT → 无 echo 回环。
+const settings = useSettingsStore()
+onMounted(async () => {
+  const s = await settings.load().catch(() => null)
+  if (!s) return
+  if (typeof s.theme === 'string') useAppearance().load(s.theme)
+  if (s.language === 'zh' || s.language === 'en') setLocale(s.language as 'zh' | 'en')
+})
 </script>
 
 <template>
diff --git a/frontend/src/api/settings.ts b/frontend/src/api/settings.ts
new file mode 100644
index 00000000..c4ee6a17
--- /dev/null
+++ b/frontend/src/api/settings.ts
@@ -0,0 +1,18 @@
+import { api } from './http'
+
+// /api/settings 是一个自由 key-value 对象(theme/language/各开关/端口/webFetchBackend/updateUrl…)。
+// GET 返裸 settings 对象;PUT 浅合并传入的 partial,返 {success, settings(合并后), webFetchSyncWarning?}。
+export type Settings = Record<string, unknown>
+
+export const getSettings = () => api<Settings>('GET', '/api/settings')
+
+export async function saveSettings(
+  partial: Settings,
+): Promise<{ settings: Settings; webFetchSyncWarning?: string }> {
+  const data = await api<{ settings?: Settings; webFetchSyncWarning?: string }>(
+    'PUT',
+    '/api/settings',
+    partial,
+  )
+  return { settings: data.settings || {}, webFetchSyncWarning: data.webFetchSyncWarning }
+}
diff --git a/frontend/src/pages/SettingsPage.vue b/frontend/src/pages/SettingsPage.vue
index b63b4395..0e2db3e7 100644
--- a/frontend/src/pages/SettingsPage.vue
+++ b/frontend/src/pages/SettingsPage.vue
@@ -1,14 +1,65 @@
 <script setup lang="ts">
-import { ref } from 'vue'
+import { computed, onMounted } from 'vue'
 import { i18nState, setLocale, t } from '@/i18n'
 import { useAppearance, type Appearance } from '@/composables/useAppearance'
+import { useSettingsStore } from '@/stores/settings'
+import type { Settings } from '@/api/settings'
+import { useToast } from '@/composables/useToast'
 import SettingsGroup from '@/components/ui/SettingsGroup.vue'
 import SettingsRow from '@/components/ui/SettingsRow.vue'
 import SegmentedControl from '@/components/ui/SegmentedControl.vue'
 import AppSwitch from '@/components/ui/AppSwitch.vue'
 
-const { current, set } = useAppearance()
+const store = useSettingsStore()
+const { current: appearance, set: setAppearance } = useAppearance()
+const { show: toast } = useToast()
 
+onMounted(() => {
+  if (!store.loaded) store.load().catch(() => {})
+})
+
+// 保存 partial → 后端浅合并;store.save 已做乐观更新 + 失败回滚,这里只 toast。
+async function persist(partial: Settings) {
+  try {
+    const warn = await store.save(partial)
+    if (warn) toast(warn, 'error')
+  } catch (e) {
+    toast((e as Error).message || '保存失败', 'error')
+  }
+}
+
+// boolean 开关 writable computed(默认值复刻旧 renderSettings 的 !==false / ===true 语义)
+function toggle(key: string, def: boolean) {
+  return computed<boolean>({
+    get: () => store.bool(key, def),
+    set: (v) => void persist({ [key]: v }),
+  })
+}
+const autoApplyOnStart = toggle('autoApplyOnStart', true)
+const restoreCodexOnExit = toggle('restoreCodexOnExit', true)
+const autoUnlockCodexPlugins = toggle('autoUnlockCodexPlugins', false)
+const autoWakeCodexPet = toggle('autoWakeCodexPet', true)
+const codexQuotaEnabled = toggle('codexQuotaEnabled', false)
+const codexNetworkAccess = toggle('codexNetworkAccess', false)
+const exposeAllProviderModels = toggle('exposeAllProviderModels', false)
+const showGrayProviders = toggle('showGrayProviders', false)
+const mcpCredentialsPortableStore = toggle('mcpCredentialsPortableStore', true)
+
+// theme / language 双向(同步本地状态 + 持久化服务端)
+const theme = computed<Appearance>({
+  get: () => appearance.value,
+  set: (v) => {
+    setAppearance(v)
+    void persist({ theme: v })
+  },
+})
+const language = computed<'zh' | 'en'>({
+  get: () => i18nState.locale,
+  set: (v) => {
+    setLocale(v)
+    void persist({ language: v })
+  },
+})
 const themeOptions: { value: Appearance; label: string }[] = [
   { value: 'light', label: '白' },
   { value: 'dark', label: '黑' },
@@ -19,37 +70,144 @@ const langOptions: { value: 'zh' | 'en'; label: string }[] = [
   { value: 'en', label: 'EN' },
 ]
 
-// 占位开关(Stage 3 接 settings store + /api/settings)
-const autoApply = ref(true)
-const autoUnlock = ref(false)
+// webFetchBackend(off/auto/curl/wreq/headless;仅 off/auto 有 i18n,余技术名)
+// 默认 auto(对齐后端 schema DEFAULT_WEB_FETCH_BACKEND + 旧前端;key 缺失时运行时实为 auto)
+const webFetchBackend = computed<string>({
+  get: () => store.str('webFetchBackend', 'auto'),
+  set: (v) => void persist({ webFetchBackend: v }),
+})
+const webFetchOptions: { value: string; label: string }[] = [
+  { value: 'off', label: t('settings.webFetchBackend.off') },
+  { value: 'auto', label: t('settings.webFetchBackend.auto') },
+  { value: 'curl', label: 'curl' },
+  { value: 'wreq', label: 'wreq' },
+  { value: 'headless', label: 'headless' },
+]
+
+function onPort(key: 'proxyPort' | 'adminPort', e: Event) {
+  const v = Number((e.target as HTMLInputElement).value)
+  if (Number.isFinite(v) && v > 0) void persist({ [key]: v })
+}
+function onUpdateUrl(e: Event) {
+  void persist({ updateUrl: (e.target as HTMLInputElement).value.trim() })
+}
 </script>
 
 <template>
   <div>
-    <SettingsGroup :title="t('nav.settings')">
-      <SettingsRow title="外观" description="应用主题：白 / 黑 / 国风">
-        <SegmentedControl
-          :model-value="current"
-          :options="themeOptions"
-          @update:model-value="(v) => set(v as Appearance)"
-        />
+    <h1 class="page-title">{{ t('settings.title') }}</h1>
+
+    <SettingsGroup title="外观与语言">
+      <SettingsRow :title="t('settings.theme')" description="应用主题:白 / 黑 / 国风">
+        <SegmentedControl v-model="theme" :options="themeOptions" />
       </SettingsRow>
-      <SettingsRow title="语言 / Language" description="界面显示语言">
-        <SegmentedControl
-          :model-value="i18nState.locale"
-          :options="langOptions"
-          @update:model-value="(v) => setLocale(v as 'zh' | 'en')"
-        />
+      <SettingsRow :title="t('settings.language')" description="界面显示语言">
+        <SegmentedControl v-model="language" :options="langOptions" />
       </SettingsRow>
     </SettingsGroup>
 
-    <SettingsGroup title="启动">
-      <SettingsRow title="启动时自动应用" description="启动 transfer 时自动把当前提供商写入 Codex 配置">
-        <AppSwitch v-model="autoApply" />
+    <SettingsGroup title="启动与配置">
+      <SettingsRow :title="t('settings.autoApplyOnStart')" :description="t('settings.autoApplyOnStartHint')">
+        <AppSwitch v-model="autoApplyOnStart" />
       </SettingsRow>
-      <SettingsRow title="自动解锁 Codex 插件" description="无真实账号时通过 CDP 注入解锁(高延迟, 默认关)">
-        <AppSwitch v-model="autoUnlock" />
+      <SettingsRow :title="t('settings.restoreCodexOnExit')" :description="t('settings.restoreCodexOnExitHint')">
+        <AppSwitch v-model="restoreCodexOnExit" />
+      </SettingsRow>
+    </SettingsGroup>
+
+    <SettingsGroup title="Codex 集成">
+      <SettingsRow :title="t('settings.autoUnlockCodexPlugins')" :description="t('settings.autoUnlockCodexPluginsHint')">
+        <AppSwitch v-model="autoUnlockCodexPlugins" />
+      </SettingsRow>
+      <SettingsRow :title="t('settings.autoWakeCodexPet')" :description="t('settings.autoWakeCodexPetHint')">
+        <AppSwitch v-model="autoWakeCodexPet" />
+      </SettingsRow>
+      <SettingsRow :title="t('settings.codexQuotaEnabled')" :description="t('settings.codexQuotaEnabledHint')">
+        <AppSwitch v-model="codexQuotaEnabled" />
+      </SettingsRow>
+      <SettingsRow :title="t('settings.codexNetworkAccess')" :description="t('settings.codexNetworkAccessHint')">
+        <AppSwitch v-model="codexNetworkAccess" />
+      </SettingsRow>
+    </SettingsGroup>
+
+    <SettingsGroup title="提供商">
+      <SettingsRow :title="t('settings.exposeAllModels')" description="OpenAI 模型菜单展示全部模型">
+        <AppSwitch v-model="exposeAllProviderModels" />
+      </SettingsRow>
+      <SettingsRow :title="t('settings.showGrayProviders')" :description="t('settings.showGrayProvidersHint')">
+        <AppSwitch v-model="showGrayProviders" />
+      </SettingsRow>
+    </SettingsGroup>
+
+    <SettingsGroup title="高级">
+      <SettingsRow :title="t('settings.mcpCredentialsPortableStore')" :description="t('settings.mcpCredentialsPortableStoreHint')">
+        <AppSwitch v-model="mcpCredentialsPortableStore" />
+      </SettingsRow>
+      <SettingsRow :title="t('settings.webFetchBackend')" :description="t('settings.webFetchBackendHint')">
+        <SegmentedControl v-model="webFetchBackend" :options="webFetchOptions" />
+      </SettingsRow>
+      <SettingsRow :title="t('settings.proxyPort')" description="本地转发代理监听端口(改后需重启生效)">
+        <input
+          type="number"
+          class="settings-num"
+          :value="store.num('proxyPort', 0) || ''"
+          min="1"
+          max="65535"
+          @change="onPort('proxyPort', $event)"
+        />
+      </SettingsRow>
+      <SettingsRow :title="t('settings.adminPort')" description="管理 API 端口(改后需重启生效)">
+        <input
+          type="number"
+          class="settings-num"
+          :value="store.num('adminPort', 0) || ''"
+          min="1"
+          max="65535"
+          @change="onPort('adminPort', $event)"
+        />
+      </SettingsRow>
+      <SettingsRow :title="t('settings.updateUrl')" description="自定义更新检查地址(留空用默认)">
+        <input
+          type="text"
+          class="settings-input"
+          :value="store.str('updateUrl')"
+          placeholder="https://..."
+          spellcheck="false"
+          @change="onUpdateUrl"
+        />
       </SettingsRow>
     </SettingsGroup>
   </div>
 </template>
+
+<style scoped>
+.page-title {
+  font-size: var(--fs-xl);
+  font-weight: 600;
+  margin: 0 0 var(--space-5);
+}
+.settings-num {
+  width: 110px;
+}
+.settings-input {
+  width: 240px;
+  max-width: 100%;
+}
+.settings-num,
+.settings-input {
+  height: 30px;
+  padding: 0 var(--space-3);
+  border: 1px solid var(--border-strong);
+  border-radius: var(--radius);
+  background: var(--surface);
+  color: var(--text);
+  font-size: var(--fs-base);
+  font-family: inherit;
+}
+.settings-num:focus,
+.settings-input:focus {
+  outline: none;
+  border-color: var(--accent);
+  box-shadow: 0 0 0 3px var(--accent-soft);
+}
+</style>
diff --git a/frontend/src/stores/settings.ts b/frontend/src/stores/settings.ts
new file mode 100644
index 00000000..4fd4d426
--- /dev/null
+++ b/frontend/src/stores/settings.ts
@@ -0,0 +1,46 @@
+import { defineStore } from 'pinia'
+import { ref } from 'vue'
+import * as settingsApi from '@/api/settings'
+import type { Settings } from '@/api/settings'
+
+export const useSettingsStore = defineStore('settings', () => {
+  const settings = ref<Settings>({})
+  const loaded = ref(false)
+
+  async function load() {
+    settings.value = await settingsApi.getSettings()
+    loaded.value = true
+    return settings.value
+  }
+
+  // PUT partial(浅合并)→ 后端返合并后 settings;返回可选 webFetchSyncWarning 供 UI toast。
+  // 乐观更新(开关即时响应)+ 失败回滚(防 UI 与服务端不一致)。
+  async function save(partial: Settings): Promise<string | undefined> {
+    const prev = { ...settings.value }
+    settings.value = { ...settings.value, ...partial }
+    try {
+      const { settings: merged, webFetchSyncWarning } = await settingsApi.saveSettings(partial)
+      settings.value = merged
+      return webFetchSyncWarning
+    } catch (e) {
+      settings.value = prev
+      throw e
+    }
+  }
+
+  // 带默认值的 typed getter(旧 app.js renderSettings 的 `!== false` / `=== true` 默认语义)
+  function bool(key: string, def: boolean): boolean {
+    const v = settings.value[key]
+    return typeof v === 'boolean' ? v : def
+  }
+  function str(key: string, def = ''): string {
+    const v = settings.value[key]
+    return typeof v === 'string' ? v : def
+  }
+  function num(key: string, def = 0): number {
+    const v = settings.value[key]
+    return typeof v === 'number' ? v : def
+  }
+
+  return { settings, loaded, load, save, bool, str, num }
+})