feat(settings): 新增独立设置页并统一桌面偏好读取

新增 /settings 页面，集中管理桌面行为与启动偏好开关

抽离 desktop-settings 工具，统一本地布尔配置读写

首页默认跳转逻辑改为复用设置工具，减少重复实现

frontend/pages/settings.vue

@@ -0,0 +1,214 @@
+<template>
+  <div class="h-screen flex overflow-hidden" style="background-color: #EDEDED">
+    <div class="flex-1 flex flex-col min-h-0" style="background-color: #EDEDED">
+      <div class="flex-1 min-h-0 overflow-auto p-6">
+        <div class="max-w-3xl mx-auto">
+          <div class="bg-white border border-gray-200 rounded-lg overflow-hidden">
+            <div class="px-5 py-4 border-b border-gray-200 bg-[#F7F7F7]">
+              <div class="text-lg font-semibold text-gray-900">设置</div>
+              <div class="text-sm text-gray-500 mt-1">桌面端相关行为与启动偏好</div>
+            </div>
+
+            <div class="p-5 space-y-5">
+              <div v-if="!isDesktopEnv" class="rounded-md border border-amber-200 bg-amber-50 text-amber-900 px-3 py-2 text-xs leading-5">
+                当前为浏览器环境：“桌面行为”分组仅桌面端可用；“启动偏好”分组可正常使用。
+              </div>
+
+              <div class="rounded-lg border border-gray-200">
+                <div class="px-4 py-3 border-b border-gray-200 bg-gray-50">
+                  <div class="text-sm font-medium text-gray-900">桌面行为</div>
+                </div>
+                <div class="px-4 py-3 space-y-4">
+                  <div class="flex items-center justify-between gap-4">
+                    <div class="min-w-0">
+                      <div class="text-sm font-medium text-gray-900">开机自启动</div>
+                      <div class="text-xs text-gray-500">系统登录后自动启动桌面端</div>
+                    </div>
+                    <input
+                      type="checkbox"
+                      class="h-4 w-4"
+                      :checked="desktopAutoLaunch"
+                      :disabled="!isDesktopEnv || desktopAutoLaunchLoading"
+                      @change="onDesktopAutoLaunchToggle"
+                    />
+                  </div>
+                  <div v-if="desktopAutoLaunchError" class="text-xs text-red-600 whitespace-pre-wrap">
+                    {{ desktopAutoLaunchError }}
+                  </div>
+
+                  <div class="flex items-center justify-between gap-4">
+                    <div class="min-w-0">
+                      <div class="text-sm font-medium text-gray-900">关闭窗口行为</div>
+                      <div class="text-xs text-gray-500">点击关闭按钮时：默认最小化到托盘</div>
+                    </div>
+                    <select
+                      class="text-sm px-2 py-1 rounded-md border border-gray-200 bg-white"
+                      :disabled="!isDesktopEnv || desktopCloseBehaviorLoading"
+                      :value="desktopCloseBehavior"
+                      @change="onDesktopCloseBehaviorChange"
+                    >
+                      <option value="tray">最小化到托盘</option>
+                      <option value="exit">直接退出</option>
+                    </select>
+                  </div>
+                  <div v-if="desktopCloseBehaviorError" class="text-xs text-red-600 whitespace-pre-wrap">
+                    {{ desktopCloseBehaviorError }}
+                  </div>
+                </div>
+              </div>
+
+              <div class="rounded-lg border border-gray-200">
+                <div class="px-4 py-3 border-b border-gray-200 bg-gray-50">
+                  <div class="text-sm font-medium text-gray-900">启动偏好</div>
+                </div>
+                <div class="px-4 py-3 space-y-4">
+                  <div class="flex items-center justify-between gap-4">
+                    <div class="min-w-0">
+                      <div class="text-sm font-medium text-gray-900">启动后自动开启实时获取</div>
+                      <div class="text-xs text-gray-500">进入聊天页后自动打开“实时开关”（默认关闭）</div>
+                    </div>
+                    <input
+                      type="checkbox"
+                      class="h-4 w-4"
+                      :checked="desktopAutoRealtime"
+                      @change="onDesktopAutoRealtimeToggle"
+                    />
+                  </div>
+
+                  <div class="flex items-center justify-between gap-4">
+                    <div class="min-w-0">
+                      <div class="text-sm font-medium text-gray-900">有数据时默认进入聊天页</div>
+                      <div class="text-xs text-gray-500">有已解密账号时，打开应用默认跳转到 /chat（默认关闭）</div>
+                    </div>
+                    <input
+                      type="checkbox"
+                      class="h-4 w-4"
+                      :checked="desktopDefaultToChatWhenData"
+                      @change="onDesktopDefaultToChatToggle"
+                    />
+                  </div>
+                </div>
+              </div>
+            </div>
+          </div>
+        </div>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup>
+import { DESKTOP_SETTING_AUTO_REALTIME_KEY, DESKTOP_SETTING_DEFAULT_TO_CHAT_KEY, readLocalBoolSetting, writeLocalBoolSetting } from '~/utils/desktop-settings'
+
+useHead({ title: '设置 - 微信数据分析助手' })
+
+const isDesktopEnv = ref(false)
+
+const desktopAutoRealtime = ref(false)
+const desktopDefaultToChatWhenData = ref(false)
+
+const desktopAutoLaunch = ref(false)
+const desktopAutoLaunchLoading = ref(false)
+const desktopAutoLaunchError = ref('')
+
+const desktopCloseBehavior = ref('tray')
+const desktopCloseBehaviorLoading = ref(false)
+const desktopCloseBehaviorError = ref('')
+
+const refreshDesktopAutoLaunch = async () => {
+  if (!process.client || typeof window === 'undefined') return
+  if (!window.wechatDesktop?.getAutoLaunch) return
+  desktopAutoLaunchLoading.value = true
+  desktopAutoLaunchError.value = ''
+  try {
+    desktopAutoLaunch.value = !!(await window.wechatDesktop.getAutoLaunch())
+  } catch (e) {
+    desktopAutoLaunchError.value = e?.message || '读取开机自启动状态失败'
+  } finally {
+    desktopAutoLaunchLoading.value = false
+  }
+}
+
+const setDesktopAutoLaunch = async (enabled) => {
+  if (!process.client || typeof window === 'undefined') return
+  if (!window.wechatDesktop?.setAutoLaunch) return
+  desktopAutoLaunchLoading.value = true
+  desktopAutoLaunchError.value = ''
+  try {
+    desktopAutoLaunch.value = !!(await window.wechatDesktop.setAutoLaunch(!!enabled))
+  } catch (e) {
+    desktopAutoLaunchError.value = e?.message || '设置开机自启动失败'
+    await refreshDesktopAutoLaunch()
+  } finally {
+    desktopAutoLaunchLoading.value = false
+  }
+}
+
+const refreshDesktopCloseBehavior = async () => {
+  if (!process.client || typeof window === 'undefined') return
+  if (!window.wechatDesktop?.getCloseBehavior) return
+  desktopCloseBehaviorLoading.value = true
+  desktopCloseBehaviorError.value = ''
+  try {
+    const v = await window.wechatDesktop.getCloseBehavior()
+    desktopCloseBehavior.value = String(v || '').toLowerCase() === 'exit' ? 'exit' : 'tray'
+  } catch (e) {
+    desktopCloseBehaviorError.value = e?.message || '读取关闭窗口行为失败'
+  } finally {
+    desktopCloseBehaviorLoading.value = false
+  }
+}
+
+const setDesktopCloseBehavior = async (behavior) => {
+  if (!process.client || typeof window === 'undefined') return
+  if (!window.wechatDesktop?.setCloseBehavior) return
+  const desired = String(behavior || '').toLowerCase() === 'exit' ? 'exit' : 'tray'
+  desktopCloseBehaviorLoading.value = true
+  desktopCloseBehaviorError.value = ''
+  try {
+    const v = await window.wechatDesktop.setCloseBehavior(desired)
+    desktopCloseBehavior.value = String(v || '').toLowerCase() === 'exit' ? 'exit' : 'tray'
+  } catch (e) {
+    desktopCloseBehaviorError.value = e?.message || '设置关闭窗口行为失败'
+    await refreshDesktopCloseBehavior()
+  } finally {
+    desktopCloseBehaviorLoading.value = false
+  }
+}
+
+const onDesktopAutoLaunchToggle = async (ev) => {
+  const checked = !!ev?.target?.checked
+  await setDesktopAutoLaunch(checked)
+}
+
+const onDesktopCloseBehaviorChange = async (ev) => {
+  const v = String(ev?.target?.value || '').trim()
+  await setDesktopCloseBehavior(v)
+}
+
+const onDesktopAutoRealtimeToggle = (ev) => {
+  const checked = !!ev?.target?.checked
+  desktopAutoRealtime.value = checked
+  writeLocalBoolSetting(DESKTOP_SETTING_AUTO_REALTIME_KEY, checked)
+}
+
+const onDesktopDefaultToChatToggle = (ev) => {
+  const checked = !!ev?.target?.checked
+  desktopDefaultToChatWhenData.value = checked
+  writeLocalBoolSetting(DESKTOP_SETTING_DEFAULT_TO_CHAT_KEY, checked)
+}
+
+onMounted(async () => {
+  if (process.client && typeof window !== 'undefined') {
+    isDesktopEnv.value = !!window.wechatDesktop
+  }
+
+  desktopAutoRealtime.value = readLocalBoolSetting(DESKTOP_SETTING_AUTO_REALTIME_KEY, false)
+  desktopDefaultToChatWhenData.value = readLocalBoolSetting(DESKTOP_SETTING_DEFAULT_TO_CHAT_KEY, false)
+
+  if (isDesktopEnv.value) {
+    await refreshDesktopAutoLaunch()
+    await refreshDesktopCloseBehavior()
+  }
+})
+</script>