From 330bb7f5050dbe963313e9c79a7927799869b7c1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=BB=9D=E5=B0=98?= <237809796@qq.com>
Date: Sun, 21 Jun 2026 20:50:44 +0800
Subject: [PATCH] =?UTF-8?q?=E6=96=B0=E5=A2=9E:=20=E8=AE=BE=E7=BD=AE?=
 =?UTF-8?q?=E9=A1=B5=20UX=20=E9=87=8D=E6=9E=84(master-detail=20=E5=B7=A6?=
 =?UTF-8?q?=E5=AF=BC=E8=88=AA=20+=20=E6=90=9C=E7=B4=A2=20+=20=E5=8D=B3?=
 =?UTF-8?q?=E6=97=B6=E5=8F=8D=E9=A6=88=20+=20=E5=AF=BC=E5=85=A5=E5=AF=BC?=
 =?UTF-8?q?=E5=87=BA)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- SettingsNav 左导航 7 类 + 顶部搜索(索引匹配 label/desc 高亮定位)
- GeneralPanel 拆分 Appearance/Performance/Advanced Section
- SettingRow 统一行 + 即时反馈(已保存)+ 下轮生效 badge
- 统一组件库 settings.css(scoped 重复 class 抽全局)
- 导入导出(默认排除 keyring 密钥)
- activeCategory 持久化 + 窄屏折叠 tab
---
 src/components/settings/AdvancedSection.vue   |  54 +++
 src/components/settings/AllowedDirsPanel.vue  |  37 +-
 src/components/settings/AppearanceSection.vue | 122 +++++++
 src/components/settings/ConnectionPanel.vue   |  59 ++--
 src/components/settings/GeneralPanel.vue      | 329 +-----------------
 src/components/settings/KnowledgePanel.vue    | 202 ++++-------
 .../settings/PerformanceSection.vue           | 231 ++++++++++++
 src/components/settings/ProviderPanel.vue     |  49 +--
 src/components/settings/SettingRow.vue        |  84 +++++
 .../settings/SettingsImportExport.vue         | 233 +++++++++++++
 src/components/settings/SettingsNav.vue       | 276 +++++++++++++++
 src/components/settings/searchIndex.ts        |  88 +++++
 src/components/settings/settings.css          |  69 ++++
 src/i18n/en/settings.ts                       |  44 ++-
 src/i18n/zh-CN/settings.ts                    |  44 ++-
 src/main.ts                                   |   1 +
 src/views/Settings.vue                        | 223 +++++++++---
 17 files changed, 1539 insertions(+), 606 deletions(-)
 create mode 100644 src/components/settings/AdvancedSection.vue
 create mode 100644 src/components/settings/AppearanceSection.vue
 create mode 100644 src/components/settings/PerformanceSection.vue
 create mode 100644 src/components/settings/SettingRow.vue
 create mode 100644 src/components/settings/SettingsImportExport.vue
 create mode 100644 src/components/settings/SettingsNav.vue
 create mode 100644 src/components/settings/searchIndex.ts
 create mode 100644 src/components/settings/settings.css

diff --git a/src/components/settings/AdvancedSection.vue b/src/components/settings/AdvancedSection.vue
new file mode 100644
index 0000000..70842ba
--- /dev/null
+++ b/src/components/settings/AdvancedSection.vue
@@ -0,0 +1,54 @@
+<template>
+  <!-- ═══ 高级设置(AI 自动执行 / 日志级别)═══ -->
+  <section class="panel">
+    <div class="panel-header">
+      <h2>{{ $t('settings.sectionAdvanced') }}</h2>
+    </div>
+    <div class="general-settings">
+      <SettingRow ref="rowAutoExecute" :label="$t('settings.labelAutoExecute')" :desc="$t('settings.descAutoExecute')">
+        <label class="toggle">
+          <input type="checkbox" v-model="settings.autoExecute" @change="markSaved('autoExecute')" />
+          <span class="toggle-slider"></span>
+        </label>
+      </SettingRow>
+      <SettingRow ref="rowLogLevel" :label="$t('settings.labelLogLevel')" :desc="$t('settings.descLogLevel')">
+        <select v-model="settings.logLevel" class="setting-select" @change="markSaved('logLevel')">
+          <option value="error">Error</option>
+          <option value="warn">Warning</option>
+          <option value="info">Info</option>
+          <option value="debug">Debug</option>
+        </select>
+      </SettingRow>
+    </div>
+  </section>
+</template>
+
+<script setup lang="ts">
+import { reactive, useTemplateRef } from 'vue'
+import SettingRow from './SettingRow.vue'
+
+// ============================================================
+// 高级域 — AI 自动执行开关 / 日志级别
+// 拆自 GeneralPanel,忠实迁移原逻辑:原 GeneralPanel 这两项为 session 内 reactive
+// (无 appSettings 持久化/watch),此处保持一致(无 watch/IPC),避免阶段2 引入行为变更。
+// 阶段5:SettingRow 封装行布局,控件变更后调 markSaved 显"已保存"
+// 后续若需持久化,单独建改进项。
+// ============================================================
+const settings = reactive({
+  autoExecute: false,
+  logLevel: 'info',
+})
+
+const rowAutoExecute = useTemplateRef<InstanceType<typeof SettingRow>>('rowAutoExecute')
+const rowLogLevel = useTemplateRef<InstanceType<typeof SettingRow>>('rowLogLevel')
+function markSaved(key: 'autoExecute' | 'logLevel') {
+  const map = { autoExecute: rowAutoExecute.value, logLevel: rowLogLevel.value }
+  map[key]?.markSaved()
+}
+</script>
+
+<style scoped>
+/* 阶段5 UX 重构:复用 settings.css 全局 .panel/.panel-header/.general-settings/
+   .setting-select/.toggle/.toggle-slider + SettingRow(封装 .setting-row/.setting-info/
+   .setting-label/.setting-desc/.setting-control)。本 Section 无特有 scoped 样式。 */
+</style>
diff --git a/src/components/settings/AllowedDirsPanel.vue b/src/components/settings/AllowedDirsPanel.vue
index 3d93198..e82bc51 100644
--- a/src/components/settings/AllowedDirsPanel.vue
+++ b/src/components/settings/AllowedDirsPanel.vue
@@ -142,20 +142,10 @@ onMounted(load)
 </script>
 
 <style scoped>
-.panel {
-  background: var(--df-bg-card);
-  border: 0.5px solid var(--df-border);
-  border-radius: var(--df-radius-lg);
-  padding: var(--df-pad-panel);
-}
-.panel-header {
-  display: flex;
-  justify-content: space-between;
-  align-items: center;
-  margin-bottom: var(--df-gap-head);
-}
-.panel-header h2 { font-size: 15px; font-weight: 500; }
-
+/* 阶段1/3 UX 重构:panel/panel-header/empty-hint/btn 系列/setting-select/
+   已迁移到 settings.css 全局。
+   本 scoped 仅保留 AllowedDirsPanel 特有样式:allowed-dirs/dir-row/dir-path/
+   add-row/dir-input/actions。 */
 .allowed-dirs { display: flex; flex-direction: column; gap: 8px; }
 .allowed-dirs-desc {
   font-size: 12px; color: var(--df-text-dim); margin: 0 0 4px; line-height: 1.5;
@@ -172,26 +162,7 @@ onMounted(load)
   overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
   flex: 1; margin-right: 12px;
 }
-.empty-hint { font-size: 12px; color: var(--df-text-dim); padding: 8px 0; }
 .add-row { display: flex; gap: 8px; margin-top: 4px; }
 .dir-input { flex: 1; min-width: 0; }
 .actions { display: flex; gap: 8px; margin-top: 8px; }
-
-.btn {
-  padding: 8px 16px; border: none; border-radius: var(--df-radius-sm);
-  font-size: 13px; cursor: pointer; transition: all 0.15s;
-}
-.btn-primary { background: var(--df-accent); color: #fff; }
-.btn-primary:hover { background: var(--df-accent-hover); }
-.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
-.btn-ghost { background: transparent; color: var(--df-text-secondary); border: 0.5px solid var(--df-border); }
-.btn-ghost:hover { background: var(--df-bg-card); color: var(--df-text); }
-.btn-ghost:disabled { opacity: 0.5; cursor: not-allowed; }
-.btn-sm { padding: 4px 12px; font-size: 12px; }
-
-.setting-select {
-  padding: 6px 12px; background: var(--df-bg); border: 0.5px solid var(--df-border);
-  border-radius: var(--df-radius-sm); color: var(--df-text); font-size: 13px; outline: none;
-}
-.setting-select:focus { border-color: var(--df-accent); }
 </style>
diff --git a/src/components/settings/AppearanceSection.vue b/src/components/settings/AppearanceSection.vue
new file mode 100644
index 0000000..235a796
--- /dev/null
+++ b/src/components/settings/AppearanceSection.vue
@@ -0,0 +1,122 @@
+<template>
+  <!-- ═══ 外观设置(主题 / 语言 / AI 语言 / Token 用量)═══ -->
+  <section class="panel">
+    <div class="panel-header">
+      <h2>{{ $t('settings.sectionAppearance') }}</h2>
+    </div>
+    <div class="general-settings">
+      <SettingRow ref="rowTheme" :label="$t('settings.labelTheme')" :desc="$t('settings.descTheme')">
+        <select v-model="settings.theme" class="setting-select" @change="markSaved('theme')">
+          <option value="dark">{{ $t('settings.themeDark') }}</option>
+          <option value="light">{{ $t('settings.themeLight') }}</option>
+          <option value="system">{{ $t('settings.themeSystem') }}</option>
+        </select>
+      </SettingRow>
+      <SettingRow ref="rowLanguage" :label="$t('settings.labelLanguage')" :desc="$t('settings.descLanguage')">
+        <select v-model="settings.language" class="setting-select" @change="markSaved('language')">
+          <option value="zh-CN">{{ $t('settings.aiLanguageZh') }}</option>
+          <option value="en">{{ $t('settings.aiLanguageEn') }}</option>
+        </select>
+      </SettingRow>
+      <SettingRow ref="rowAiLanguage" :label="$t('settings.labelAiLanguage')" :desc="$t('settings.descAiLanguage')">
+        <select v-model="settings.aiLanguage" class="setting-select" @change="markSaved('aiLanguage')">
+          <option value="auto">{{ $t('settings.aiLanguageAuto') }}</option>
+          <option value="zh-CN">{{ $t('settings.aiLanguageZh') }}</option>
+          <option value="en">{{ $t('settings.aiLanguageEn') }}</option>
+        </select>
+      </SettingRow>
+      <SettingRow ref="rowToken" :label="$t('settings.labelShowTokenUsage')" :desc="$t('settings.descShowTokenUsage')">
+        <label class="toggle">
+          <input type="checkbox" v-model="settings.showTokenUsage" @change="markSaved('token')" />
+          <span class="toggle-slider"></span>
+        </label>
+      </SettingRow>
+      <SettingRow ref="rowStreamingMd" :label="$t('settings.labelStreamingMd')" :desc="$t('settings.descStreamingMd')">
+        <label class="toggle">
+          <input type="checkbox" v-model="settings.streamingMd" @change="markSaved('streamingMd')" />
+          <span class="toggle-slider"></span>
+        </label>
+      </SettingRow>
+    </div>
+  </section>
+</template>
+
+<script setup lang="ts">
+import { reactive, watch, onMounted, useTemplateRef } from 'vue'
+import { useAppSettingsStore } from '@/stores/appSettings'
+import i18n from '@/i18n'
+import SettingRow from './SettingRow.vue'
+
+// ============================================================
+// 外观域 — 本地设置(localStorage):主题 / 界面语言 / AI 语言 / Token 用量显隐
+// 拆自 GeneralPanel,本 Section 仅持有外观相关 key
+// 阶段5:SettingRow 封装行布局,控件变更后调 markSaved 显"已保存"
+// ============================================================
+const appSettings = useAppSettingsStore()
+
+const settings = reactive({
+  theme: appSettings.get<string>('df-theme', 'dark'),
+  language: appSettings.get<string>('df-language', 'zh-CN'),
+  aiLanguage: appSettings.get<string>('df-ai-language', 'auto'),
+  showTokenUsage: appSettings.get<boolean>('df-show-token-usage', false),
+  // AR-1 流式 Markdown 渲染开关:默认 true(流式过程渲染代码块/列表/标题格式);
+  // 关 → 回退纯文本(防掉帧/性能敏感场景降级)
+  streamingMd: appSettings.get<boolean>('df-ai-streaming-md', true),
+})
+
+function applyTheme(theme: string) {
+  if (theme === 'system') {
+    const prefersDark = window.matchMedia('(prefers-color-scheme: dark)').matches
+    document.documentElement.removeAttribute('data-theme')
+    if (!prefersDark) document.documentElement.setAttribute('data-theme', 'light')
+  } else if (theme === 'light') {
+    document.documentElement.setAttribute('data-theme', 'light')
+  } else {
+    document.documentElement.removeAttribute('data-theme')
+  }
+}
+
+// 即时生效反馈:SettingRow refs,key 映射对应 row
+const rowTheme = useTemplateRef<InstanceType<typeof SettingRow>>('rowTheme')
+const rowLanguage = useTemplateRef<InstanceType<typeof SettingRow>>('rowLanguage')
+const rowAiLanguage = useTemplateRef<InstanceType<typeof SettingRow>>('rowAiLanguage')
+const rowToken = useTemplateRef<InstanceType<typeof SettingRow>>('rowToken')
+const rowStreamingMd = useTemplateRef<InstanceType<typeof SettingRow>>('rowStreamingMd')
+function markSaved(key: 'theme' | 'language' | 'aiLanguage' | 'token' | 'streamingMd') {
+  const map = { theme: rowTheme.value, language: rowLanguage.value, aiLanguage: rowAiLanguage.value, token: rowToken.value, streamingMd: rowStreamingMd.value }
+  map[key]?.markSaved()
+}
+
+watch(() => settings.theme, (val) => {
+  applyTheme(val)
+  void appSettings.set('df-theme', val)
+})
+
+watch(() => settings.aiLanguage, (val) => {
+  void appSettings.set('df-ai-language', val)
+})
+
+watch(() => settings.showTokenUsage, (val) => {
+  void appSettings.set('df-show-token-usage', val)
+})
+
+watch(() => settings.streamingMd, (val) => {
+  void appSettings.set('df-ai-streaming-md', val)
+})
+
+watch(() => settings.language, (val) => {
+  void appSettings.set('df-language', val)
+  // 同步 i18n 实例，让界面立即跟随语言切换
+  i18n.global.locale.value = val as 'zh-CN' | 'en'
+})
+
+onMounted(() => {
+  applyTheme(settings.theme)
+})
+</script>
+
+<style scoped>
+/* 阶段5 UX 重构:复用 settings.css 全局 .panel/.panel-header/.general-settings/
+   .setting-select/.toggle/.toggle-slider + SettingRow(封装 .setting-row/.setting-info/
+   .setting-label/.setting-desc/.setting-control)。本 Section 无特有 scoped 样式。 */
+</style>
diff --git a/src/components/settings/ConnectionPanel.vue b/src/components/settings/ConnectionPanel.vue
index 168740d..742831d 100644
--- a/src/components/settings/ConnectionPanel.vue
+++ b/src/components/settings/ConnectionPanel.vue
@@ -2,7 +2,10 @@
   <!-- ═══ 连接管理 ═══ -->
   <section class="panel">
     <div class="panel-header">
-      <h2>{{ $t('settings.panelConnection') }}</h2>
+      <div class="panel-title-group">
+        <h2>{{ $t('settings.panelConnection') }}</h2>
+        <span class="experimental-badge">{{ $t('settings.experimentalBadge') }}</span>
+      </div>
       <button class="btn btn-ghost btn-sm" @click="openConnForm()">{{ $t('settings.addConnection') }}</button>
     </div>
     <div class="connection-list" v-if="connections.length > 0">
@@ -67,7 +70,7 @@
 </template>
 
 <script setup lang="ts">
-import { reactive, ref } from 'vue'
+import { reactive, ref, onMounted } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { useAppSettingsStore } from '@/stores/appSettings'
 
@@ -185,39 +188,39 @@ async function removeConn(id: string) {
   emit('toast', t('settings.toastDeleted'), 'info')
 }
 
-/** 暴露给 shell onMounted 调用 */
+/** 暴露给 shell(loadConnections 仍保留供外部主动刷新) */
 defineExpose({ loadConnections })
+
+// 阶段3 UX 重构:本面板改为 advanced 类懒挂载,不再由 Settings.vue onMounted 调用,
+// 改为自身挂载时载入(localStorage 读,同步无网络)。
+onMounted(loadConnections)
 </script>
 
 <style scoped>
-/* ===== 面板容器(原 Settings.vue 抽出,各子组件自持 scoped 副本) ===== */
-.panel {
-  background: var(--df-bg-card);
-  border: 0.5px solid var(--df-border);
-  border-radius: var(--df-radius-lg);
-  padding: var(--df-pad-panel);
-}
-.panel-header {
-  display: flex;
-  justify-content: space-between;
-  align-items: center;
-  margin-bottom: var(--df-gap-head);
-}
-.panel-header h2 { font-size: 15px; font-weight: 500; }
-.empty-hint { font-size: 13px; color: var(--df-text-dim); padding: 12px 0; }
+/* 阶段1/3 UX 重构:panel/panel-header/empty-hint/btn 系列/setting-select/
+   已迁移到 settings.css 全局。
+   本 scoped 仅保留 ConnectionPanel 特有样式:connection-card/conn 系列/type 系列/form 系列/
+   setting-input/btn-link 等。 */
 
-/* ===== 按钮 ===== */
-.btn { padding: 8px 16px; border: none; border-radius: var(--df-radius-sm); font-size: 13px; cursor: pointer; transition: all 0.15s; }
-.btn-primary { background: var(--df-accent); color: #fff; }
-.btn-primary:hover { background: var(--df-accent-hover); }
-.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
-.btn-ghost { background: transparent; color: var(--df-text-secondary); border: 0.5px solid var(--df-border); }
-.btn-ghost:hover { background: var(--df-bg-card); color: var(--df-text); }
-.btn-sm { padding: 4px 12px; font-size: 12px; }
+/* ===== 链接按钮(本面板特有,未进全局) ===== */
 .btn-link { background: none; border: none; color: var(--df-accent); font-size: 12px; cursor: pointer; padding: 2px 6px; }
 .btn-link:hover { text-decoration: underline; }
 .btn-link-danger { color: var(--df-danger); }
 
+/* ===== 标题组(panel-header 内 标题+badge 一组,与右侧按钮 space-between) ===== */
+.panel-title-group { display: flex; align-items: center; gap: 8px; }
+
+/* badge"实验功能·暂未接入 AI"(阶段7:warning 色,沿用 default-badge/pool-badge 模式) */
+.experimental-badge {
+  font-size: 10px;
+  padding: 1px 6px;
+  border-radius: var(--df-radius-xs);
+  background: var(--df-warning-bg);
+  color: var(--df-warning);
+  font-weight: 500;
+  white-space: nowrap;
+}
+
 /* ===== 连接卡片 ===== */
 .connection-list { display: flex; flex-direction: column; gap: 8px; }
 .connection-card {
@@ -257,7 +260,7 @@ defineExpose({ loadConnections })
 }
 .conn-actions { display: flex; gap: 4px; }
 
-/* 表单 */
+/* 表单(本面板特有输入控件样式;.setting-select 走全局) */
 .form-grid { display: flex; flex-direction: column; gap: 14px; }
 .form-field { display: flex; flex-direction: column; gap: 4px; }
 .form-label { font-size: 12px; font-weight: 500; color: var(--df-text-secondary); }
@@ -265,6 +268,4 @@ defineExpose({ loadConnections })
 
 .setting-input { padding: 6px 12px; background: var(--df-bg); border: 0.5px solid var(--df-border); border-radius: var(--df-radius-sm); color: var(--df-text); font-size: 13px; outline: none; min-width: 260px; }
 .setting-input:focus { border-color: var(--df-accent); }
-.setting-select { padding: 6px 12px; background: var(--df-bg); border: 0.5px solid var(--df-border); border-radius: var(--df-radius-sm); color: var(--df-text); font-size: 13px; outline: none; cursor: pointer; min-width: 160px; }
-.setting-select:focus { border-color: var(--df-accent); }
 </style>
diff --git a/src/components/settings/GeneralPanel.vue b/src/components/settings/GeneralPanel.vue
index dbe1421..98addfc 100644
--- a/src/components/settings/GeneralPanel.vue
+++ b/src/components/settings/GeneralPanel.vue
@@ -1,325 +1,20 @@
 <template>
-  <!-- ═══ 通用设置 ═══ -->
-  <section class="panel">
-    <div class="panel-header">
-      <h2>{{ $t('settings.panelGeneral') }}</h2>
-    </div>
-    <div class="general-settings">
-      <div class="setting-row">
-        <div class="setting-info">
-          <span class="setting-label">{{ $t('settings.labelTheme') }}</span>
-          <span class="setting-desc">{{ $t('settings.descTheme') }}</span>
-        </div>
-        <div class="setting-control">
-          <select v-model="settings.theme" class="setting-select">
-            <option value="dark">{{ $t('settings.themeDark') }}</option>
-            <option value="light">{{ $t('settings.themeLight') }}</option>
-            <option value="system">{{ $t('settings.themeSystem') }}</option>
-          </select>
-        </div>
-      </div>
-      <div class="setting-row">
-        <div class="setting-info">
-          <span class="setting-label">{{ $t('settings.labelLanguage') }}</span>
-          <span class="setting-desc">{{ $t('settings.descLanguage') }}</span>
-        </div>
-        <div class="setting-control">
-          <select v-model="settings.language" class="setting-select">
-            <option value="zh-CN">{{ $t('settings.aiLanguageZh') }}</option>
-            <option value="en">{{ $t('settings.aiLanguageEn') }}</option>
-          </select>
-        </div>
-      </div>
-      <div class="setting-row">
-        <div class="setting-info">
-          <span class="setting-label">{{ $t('settings.labelAiLanguage') }}</span>
-          <span class="setting-desc">{{ $t('settings.descAiLanguage') }}</span>
-        </div>
-        <div class="setting-control">
-          <select v-model="settings.aiLanguage" class="setting-select">
-            <option value="auto">{{ $t('settings.aiLanguageAuto') }}</option>
-            <option value="zh-CN">{{ $t('settings.aiLanguageZh') }}</option>
-            <option value="en">{{ $t('settings.aiLanguageEn') }}</option>
-          </select>
-        </div>
-      </div>
-      <div class="setting-row">
-        <div class="setting-info">
-          <span class="setting-label">{{ $t('settings.labelAutoExecute') }}</span>
-          <span class="setting-desc">{{ $t('settings.descAutoExecute') }}</span>
-        </div>
-        <div class="setting-control">
-          <label class="toggle">
-            <input type="checkbox" v-model="settings.autoExecute" />
-            <span class="toggle-slider"></span>
-          </label>
-        </div>
-      </div>
-      <div class="setting-row">
-        <div class="setting-info">
-          <span class="setting-label">{{ $t('settings.labelLogLevel') }}</span>
-          <span class="setting-desc">{{ $t('settings.descLogLevel') }}</span>
-        </div>
-        <div class="setting-control">
-          <select v-model="settings.logLevel" class="setting-select">
-            <option value="error">Error</option>
-            <option value="warn">Warning</option>
-            <option value="info">Info</option>
-            <option value="debug">Debug</option>
-          </select>
-        </div>
-      </div>
-      <div class="setting-row">
-        <div class="setting-info">
-          <span class="setting-label">{{ $t('settings.labelShowTokenUsage') }}</span>
-          <span class="setting-desc">{{ $t('settings.descShowTokenUsage') }}</span>
-        </div>
-        <div class="setting-control">
-          <label class="toggle">
-            <input type="checkbox" v-model="settings.showTokenUsage" />
-            <span class="toggle-slider"></span>
-          </label>
-        </div>
-      </div>
-      <div class="setting-row">
-        <div class="setting-info">
-          <span class="setting-label">{{ $t('settings.labelGlobalConcurrency') }}</span>
-          <span class="setting-desc">{{ $t('settings.descGlobalConcurrency') }}</span>
-        </div>
-        <div class="setting-control">
-          <input type="number" class="setting-select" min="1" style="width:80px"
-                 v-model.number="settings.llmGlobalConcurrency"
-                 @change="syncConcurrencyConfig" />
-        </div>
-      </div>
-      <div class="setting-row">
-        <div class="setting-info">
-          <span class="setting-label">{{ $t('settings.labelPerConvConcurrency') }}</span>
-          <span class="setting-desc">{{ $t('settings.descPerConvConcurrency') }}</span>
-        </div>
-        <div class="setting-control">
-          <input type="number" class="setting-select" min="1" style="width:80px"
-                 v-model.number="settings.llmPerConvConcurrency"
-                 @change="syncConcurrencyConfig" />
-        </div>
-      </div>
-      <div class="setting-row">
-        <div class="setting-info">
-          <span class="setting-label">{{ $t('settings.labelAgentMaxIterations') }}</span>
-          <span class="setting-desc">{{ $t('settings.descAgentMaxIterations') }}</span>
-        </div>
-        <div class="setting-control">
-          <input type="number" class="setting-select" min="1" max="50" style="width:80px"
-                 v-model.number="settings.agentMaxIterations"
-                 @change="syncAgentMaxIterations" />
-        </div>
-      </div>
-      <div class="setting-row">
-        <div class="setting-info">
-          <span class="setting-label">{{ $t('settings.labelAgentMaxRetries') }}</span>
-          <span class="setting-desc">{{ $t('settings.descAgentMaxRetries') }}</span>
-        </div>
-        <div class="setting-control">
-          <input type="number" class="setting-select" min="0" max="10" style="width:80px"
-                 v-model.number="settings.agentMaxRetries"
-                 @change="syncAgentMaxRetries" />
-        </div>
-      </div>
-    </div>
-  </section>
+  <!-- ═══ 通用设置(聚合壳:外观 + 性能 + 高级)═══
+       阶段2 UX 重构:原 GeneralPanel 内联内容拆为 3 Section。
+       本阶段(阶段2)Settings.vue 仍引 GeneralPanel,故此处作聚合壳组合 3 Section 保持不破;
+       下一阶段(阶段3 master-detail)Settings.vue 改为直接引各 Section 后,本聚合壳即可弃用。 -->
+  <AppearanceSection />
+  <PerformanceSection />
+  <AdvancedSection />
 </template>
 
 <script setup lang="ts">
-import { reactive, watch, onMounted, onUnmounted } from 'vue'
-import { aiApi } from '@/api'
-import { useAppSettingsStore } from '@/stores/appSettings'
-import i18n from '@/i18n'
-
-// ============================================================
-// 通用设置域 — 本地设置(localStorage):主题/语言/AI语言/并发/Agent 轮次等
-// ============================================================
-const appSettings = useAppSettingsStore()
-
-const settings = reactive({
-  theme: appSettings.get<string>('df-theme', 'dark'),
-  language: appSettings.get<string>('df-language', 'zh-CN'),
-  aiLanguage: appSettings.get<string>('df-ai-language', 'auto'),
-  autoExecute: false,
-  logLevel: 'info',
-  showTokenUsage: appSettings.get<boolean>('df-show-token-usage', false),
-  llmGlobalConcurrency: appSettings.get<number>('df-llm-global-concurrency', 3),
-  llmPerConvConcurrency: appSettings.get<number>('df-llm-per-conv-concurrency', 2),
-  // F-260616-01: Agentic 循环最大轮次，默认 10（与后端 DEFAULT_MAX_AGENT_ITERATIONS 对齐）
-  agentMaxIterations: appSettings.get<number>('df-ai-agent-max-iterations', 10),
-  // F-260616-07: 流式失败重试次数，默认 3（与后端 DEFAULT_MAX_AGENT_RETRIES 对齐）
-  agentMaxRetries: appSettings.get<number>('df-ai-agent-max-retries', 3),
-})
-
-function applyTheme(theme: string) {
-  if (theme === 'system') {
-    const prefersDark = window.matchMedia('(prefers-color-scheme: dark)').matches
-    document.documentElement.removeAttribute('data-theme')
-    if (!prefersDark) document.documentElement.setAttribute('data-theme', 'light')
-  } else if (theme === 'light') {
-    document.documentElement.setAttribute('data-theme', 'light')
-  } else {
-    document.documentElement.removeAttribute('data-theme')
-  }
-}
-
-watch(() => settings.theme, (val) => {
-  applyTheme(val)
-  void appSettings.set('df-theme', val)
-})
-
-watch(() => settings.aiLanguage, (val) => {
-  void appSettings.set('df-ai-language', val)
-})
-
-watch(() => settings.showTokenUsage, (val) => {
-  void appSettings.set('df-show-token-usage', val)
-})
-
-watch(() => settings.llmGlobalConcurrency, (v) => {
-  void appSettings.set('df-llm-global-concurrency', v)
-})
-
-watch(() => settings.llmPerConvConcurrency, (v) => {
-  void appSettings.set('df-llm-per-conv-concurrency', v)
-})
-
-watch(() => settings.agentMaxIterations, (v) => {
-  void appSettings.set('df-ai-agent-max-iterations', v)
-})
-
-watch(() => settings.agentMaxRetries, (v) => {
-  void appSettings.set('df-ai-agent-max-retries', v)
-})
-
-// 同步 LLM 并发上限到后端(debounce 300ms,防快速连续调整时频繁 IPC)
-// 持久化已由上方 watch 写 appSettings(SQLite) 完成;此处只负责同步内存限流器
-let _concurrencyTimer: ReturnType<typeof setTimeout> | null = null
-function syncConcurrencyConfig() {
-  // clamp 到合理区间,防越界输入(缓存被篡改 / 手动输超限)致限流失效;
-  // 修正后值同步回 v-model(input 显示) + watch 持久化
-  // 下限 1,无上限;约束单对话并发不超过全局并发
-  settings.llmGlobalConcurrency = Math.max(1, settings.llmGlobalConcurrency || 3)
-  settings.llmPerConvConcurrency = Math.max(1, settings.llmPerConvConcurrency || 2)
-  if (settings.llmPerConvConcurrency > settings.llmGlobalConcurrency) {
-    settings.llmPerConvConcurrency = settings.llmGlobalConcurrency
-  }
-  if (_concurrencyTimer) clearTimeout(_concurrencyTimer)
-  _concurrencyTimer = setTimeout(async () => {
-    try {
-      await aiApi.setConcurrencyConfig(settings.llmGlobalConcurrency, settings.llmPerConvConcurrency)
-    } catch (e) {
-      console.error('同步 LLM 并发配置失败:', e)
-    }
-  }, 300)
-}
-
-// 同步 Agentic 最大轮次到后端(debounce 300ms)
-// F-260616-01: 后端 loop 入口 load 快照锁定边界——热改后当前 loop 不受影响，
-// 下次发消息才生效（与 llm_concurrency 传 Arc 实时反映的区别）。
-// 双 clamp：此处 1-50 + 后端 command 再 clamp 1-50，防越界输入致 loop 失效/失控
-let _agentIterTimer: ReturnType<typeof setTimeout> | null = null
-function syncAgentMaxIterations() {
-  // clamp 1-50，防越界(过小致 agent 失能、过大致烧 token)
-  settings.agentMaxIterations = Math.min(50, Math.max(1, settings.agentMaxIterations || 10))
-  if (_agentIterTimer) clearTimeout(_agentIterTimer)
-  _agentIterTimer = setTimeout(async () => {
-    try {
-      await aiApi.setAgentMaxIterations(settings.agentMaxIterations)
-    } catch (e) {
-      console.error('同步 Agent 最大轮次失败:', e)
-    }
-  }, 300)
-}
-
-// 同步流式失败重试次数到后端(debounce 300ms)
-// F-260616-07: 后端 loop 入口 load 快照锁定边界——热改后当前 loop 不受影响，
-// 下次发消息才生效。双 clamp：此处 0-10 + 后端 command 再 clamp 0-10
-let _agentRetryTimer: ReturnType<typeof setTimeout> | null = null
-function syncAgentMaxRetries() {
-  // clamp 0-10，防越界
-  settings.agentMaxRetries = Math.min(10, Math.max(0, settings.agentMaxRetries ?? 3))
-  if (_agentRetryTimer) clearTimeout(_agentRetryTimer)
-  _agentRetryTimer = setTimeout(async () => {
-    try {
-      await aiApi.setAgentMaxRetries(settings.agentMaxRetries)
-    } catch (e) {
-      console.error('同步流式重试次数失败:', e)
-    }
-  }, 300)
-}
-
-watch(() => settings.language, (val) => {
-  void appSettings.set('df-language', val)
-  // 同步 i18n 实例，让界面立即跟随语言切换
-  i18n.global.locale.value = val as 'zh-CN' | 'en'
-})
-
-onMounted(() => {
-  applyTheme(settings.theme)
-  // 启动同步一次 LLM 并发配置（防刷新页面后后端未恢复用户设定值）
-  syncConcurrencyConfig()
-  // F-260616-01: 启动同步一次 Agentic 最大轮次（防刷新页面后后端未恢复用户设定值）
-  // F-260618-23: App.vue 根 onMounted 已在应用启动时恢复（覆盖用户没先进 Settings 直接用 AI Chat 的场景），
-  // 此处保留双保险（IPC 幂等值相同无害）
-  syncAgentMaxIterations()
-  // F-260616-07: 启动同步一次流式失败重试次数（防刷新页面后后端未恢复用户设定值）
-  // F-260618-23: 同上，App.vue 根 onMounted 已恢复，此处双保险保留
-  syncAgentMaxRetries()
-})
-
-// 组件卸载清全部 debounce timer,防 unmount 后旧 timer 仍 fire 写已销毁 reactive(timer 泄漏 FR-C3)
-onUnmounted(() => {
-  if (_concurrencyTimer) clearTimeout(_concurrencyTimer)
-  if (_agentIterTimer) clearTimeout(_agentIterTimer)
-  if (_agentRetryTimer) clearTimeout(_agentRetryTimer)
-})
+import AppearanceSection from '@/components/settings/AppearanceSection.vue'
+import PerformanceSection from '@/components/settings/PerformanceSection.vue'
+import AdvancedSection from '@/components/settings/AdvancedSection.vue'
 </script>
 
 <style scoped>
-/* ===== 面板容器(原 Settings.vue 抽出,各子组件自持 scoped 副本) ===== */
-.panel {
-  background: var(--df-bg-card);
-  border: 0.5px solid var(--df-border);
-  border-radius: var(--df-radius-lg);
-  padding: var(--df-pad-panel);
-}
-.panel-header {
-  display: flex;
-  justify-content: space-between;
-  align-items: center;
-  margin-bottom: var(--df-gap-head);
-}
-.panel-header h2 { font-size: 15px; font-weight: 500; }
-
-/* ===== 通用设置 ===== */
-.general-settings { display: flex; flex-direction: column; }
-.setting-row {
-  display: flex;
-  justify-content: space-between;
-  align-items: center;
-  padding: 14px 0;
-  border-bottom: 0.5px solid var(--df-border);
-}
-.setting-row:last-child { border-bottom: none; }
-.setting-info { display: flex; flex-direction: column; gap: 2px; }
-.setting-label { font-size: 14px; font-weight: 500; color: var(--df-text); }
-.setting-desc { font-size: 12px; color: var(--df-text-dim); }
-
-.setting-control { display: flex; align-items: center; }
-
-.setting-select { padding: 6px 12px; background: var(--df-bg); border: 0.5px solid var(--df-border); border-radius: var(--df-radius-sm); color: var(--df-text); font-size: 13px; outline: none; cursor: pointer; min-width: 160px; }
-.setting-select:focus { border-color: var(--df-accent); }
-
-/* Toggle */
-.toggle { position: relative; display: inline-block; width: 40px; height: 22px; cursor: pointer; }
-.toggle input { opacity: 0; width: 0; height: 0; }
-.toggle-slider { position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: var(--df-border); border-radius: var(--df-radius-lg); transition: background 0.2s; }
-.toggle-slider::before { content: ''; position: absolute; width: 16px; height: 16px; left: 3px; bottom: 3px; background: var(--df-text-dim); border-radius: 50%; transition: transform 0.2s, background 0.2s; }
-.toggle input:checked + .toggle-slider { background: var(--df-accent); }
-.toggle input:checked + .toggle-slider::before { transform: translateX(18px); background: #fff; }
+/* 阶段2 UX 重构:聚合壳仅组合 3 Section,无自身样式。
+   各 Section 复用 settings.css 全局 .panel 等 class,Section 之间间距由父 .settings-grid 控制。 */
 </style>
diff --git a/src/components/settings/KnowledgePanel.vue b/src/components/settings/KnowledgePanel.vue
index a8b6792..59b96ee 100644
--- a/src/components/settings/KnowledgePanel.vue
+++ b/src/components/settings/KnowledgePanel.vue
@@ -4,117 +4,67 @@
       <h2>{{ $t('settings.panelKnowledge') }}</h2>
     </div>
     <div class="general-settings">
-      <div class="setting-row">
-        <div class="setting-info">
-          <span class="setting-label">{{ $t('settings.labelAutoExtract') }}</span>
-          <span class="setting-desc">{{ $t('settings.descAutoExtract') }}</span>
-        </div>
-        <div class="setting-control">
-          <label class="toggle">
-            <input type="checkbox" v-model="knowledgeConfig.auto_extract" />
-            <span class="toggle-slider"></span>
-          </label>
-        </div>
-      </div>
-      <div class="setting-row">
-        <div class="setting-info">
-          <span class="setting-label">{{ $t('settings.labelTriggerMode') }}</span>
-          <span class="setting-desc">{{ $t('settings.descTriggerMode') }}</span>
-        </div>
-        <div class="setting-control">
-          <select v-model="knowledgeConfig.trigger_mode" class="setting-select">
-            <option value="on_complete">{{ $t('settings.triggerOnComplete') }}</option>
-            <option value="on_idle">{{ $t('settings.triggerOnIdle') }}</option>
-            <option value="manual_only">{{ $t('settings.triggerManualOnly') }}</option>
-          </select>
-        </div>
-      </div>
-      <div class="setting-row">
-        <div class="setting-info">
-          <span class="setting-label">{{ $t('settings.labelMinMessages') }}</span>
-          <span class="setting-desc">{{ $t('settings.descMinMessages') }}</span>
-        </div>
-        <div class="setting-control">
-          <input type="number" min="2" max="50" v-model.number="knowledgeConfig.min_messages" class="setting-select" style="width:80px" />
-        </div>
-      </div>
-      <div class="setting-row">
-        <div class="setting-info">
-          <span class="setting-label">{{ $t('settings.labelIdleTimeout') }}</span>
-          <span class="setting-desc">{{ $t('settings.descIdleTimeout') }}</span>
-        </div>
-        <div class="setting-control">
-          <input type="number" min="5" max="600" :value="Math.round(knowledgeConfig.idle_timeout_ms / 1000)" @input="knowledgeConfig.idle_timeout_ms = ($event.target as HTMLInputElement).valueAsNumber * 1000 || 30000" class="setting-select" style="width:80px" />
-        </div>
-      </div>
-      <div class="setting-row">
-        <div class="setting-info">
-          <span class="setting-label">{{ $t('settings.labelAutoInject') }}</span>
-          <span class="setting-desc">{{ $t('settings.descAutoInject') }}</span>
-        </div>
-        <div class="setting-control">
-          <label class="toggle">
-            <input type="checkbox" v-model="knowledgeConfig.auto_inject" />
-            <span class="toggle-slider"></span>
-          </label>
-        </div>
-      </div>
-      <div class="setting-row">
-        <div class="setting-info">
-          <span class="setting-label">{{ $t('settings.labelVectorEnabled') }}</span>
-          <span class="setting-desc">{{ $t('settings.descVectorEnabled') }}</span>
-        </div>
-        <div class="setting-control">
-          <label class="toggle">
-            <input type="checkbox" v-model="knowledgeConfig.vector_enabled" />
-            <span class="toggle-slider"></span>
-          </label>
-        </div>
-      </div>
-      <div class="setting-row" v-if="knowledgeConfig.vector_enabled">
-        <div class="setting-info">
-          <span class="setting-label">{{ $t('settings.labelEmbeddingProvider') }}</span>
-          <span class="setting-desc">{{ $t('settings.descEmbeddingProvider') }}</span>
-        </div>
-        <div class="setting-control">
-          <select v-model="knowledgeConfig.embedding_provider_id" class="setting-select">
-            <option :value="null">{{ $t('settings.embeddingProviderNone') }}</option>
-            <option v-for="p in embeddingProviders" :key="p.id" :value="p.id">{{ p.name }}</option>
-          </select>
-        </div>
-      </div>
-      <div class="setting-row" v-if="knowledgeConfig.vector_enabled">
-        <div class="setting-info">
-          <span class="setting-label">{{ $t('settings.labelEmbeddingModel') }}</span>
-          <span class="setting-desc">{{ $t('settings.descEmbeddingModel') }}</span>
-        </div>
-        <div class="setting-control">
-          <input type="text" :value="knowledgeConfig.embedding_model ?? ''" @input="knowledgeConfig.embedding_model = ($event.target as HTMLInputElement).value || null" class="setting-select" :placeholder="$t('settings.phEmbeddingModel')" style="width:220px" />
-        </div>
-      </div>
+      <SettingRow ref="rowAutoExtract" :label="$t('settings.labelAutoExtract')" :desc="$t('settings.descAutoExtract')">
+        <label class="toggle">
+          <input type="checkbox" v-model="knowledgeConfig.auto_extract" @change="markSaved('autoExtract')" />
+          <span class="toggle-slider"></span>
+        </label>
+      </SettingRow>
+      <SettingRow ref="rowTriggerMode" :label="$t('settings.labelTriggerMode')" :desc="$t('settings.descTriggerMode')">
+        <select v-model="knowledgeConfig.trigger_mode" class="setting-select" @change="markSaved('triggerMode')">
+          <option value="on_complete">{{ $t('settings.triggerOnComplete') }}</option>
+          <option value="manual_only">{{ $t('settings.triggerManualOnly') }}</option>
+        </select>
+      </SettingRow>
+      <SettingRow ref="rowMinMessages" :label="$t('settings.labelMinMessages')" :desc="$t('settings.descMinMessages')">
+        <input type="number" min="2" max="50" v-model.number="knowledgeConfig.min_messages" class="setting-select" style="width:80px" @change="markSaved('minMessages')" />
+      </SettingRow>
+      <SettingRow ref="rowAutoInject" :label="$t('settings.labelAutoInject')" :desc="$t('settings.descAutoInject')">
+        <label class="toggle">
+          <input type="checkbox" v-model="knowledgeConfig.auto_inject" @change="markSaved('autoInject')" />
+          <span class="toggle-slider"></span>
+        </label>
+      </SettingRow>
+      <SettingRow ref="rowVectorEnabled" :label="$t('settings.labelVectorEnabled')" :desc="$t('settings.descVectorEnabled')">
+        <label class="toggle">
+          <input type="checkbox" v-model="knowledgeConfig.vector_enabled" @change="markSaved('vectorEnabled')" />
+          <span class="toggle-slider"></span>
+        </label>
+      </SettingRow>
+      <SettingRow v-if="knowledgeConfig.vector_enabled" ref="rowEmbeddingProvider" :label="$t('settings.labelEmbeddingProvider')" :desc="$t('settings.descEmbeddingProvider')">
+        <select v-model="knowledgeConfig.embedding_provider_id" class="setting-select" @change="markSaved('embeddingProvider')">
+          <option :value="null">{{ $t('settings.embeddingProviderNone') }}</option>
+          <option v-for="p in embeddingProviders" :key="p.id" :value="p.id">{{ p.name }}</option>
+        </select>
+      </SettingRow>
+      <SettingRow v-if="knowledgeConfig.vector_enabled" ref="rowEmbeddingModel" :label="$t('settings.labelEmbeddingModel')" :desc="$t('settings.descEmbeddingModel')">
+        <input type="text" :value="knowledgeConfig.embedding_model ?? ''" @input="knowledgeConfig.embedding_model = ($event.target as HTMLInputElement).value || null" @change="markSaved('embeddingModel')" class="setting-select" :placeholder="$t('settings.phEmbeddingModel')" style="width:220px" />
+      </SettingRow>
     </div>
   </section>
 </template>
 
 <script setup lang="ts">
-import { reactive, computed, watch, onMounted, onUnmounted } from 'vue'
+import { reactive, computed, watch, onMounted, onUnmounted, useTemplateRef } from 'vue'
 import { knowledgeApi } from '@/api'
 import type { AiProviderConfig } from '@/api/types'
+import SettingRow from './SettingRow.vue'
 
 // ============================================================
 // 知识库配置域(提取 + 注入) — 走后端 IPC,非 localStorage
+// 阶段5:SettingRow 封装行布局,控件变更后调 markSaved 显"已保存"(用户 @change 触发,
+//        与 watch 深响应 debounce 保存解耦,启动 load 不显)
 // ============================================================
 const props = defineProps<{
-  /** Provider 列表(embedding provider 下拉依赖,由 ProviderPanel 上抛同步) */
+  /** Provider 列表(embedding provider 下拉依赖,由 ProviderPanel 上浮同步) */
   aiProviders: AiProviderConfig[]
 }>()
 
 const knowledgeConfig = reactive({
   loaded: false,
   auto_extract: true,
-  trigger_mode: 'on_complete' as 'on_complete' | 'on_idle' | 'manual_only',
+  trigger_mode: 'on_complete' as 'on_complete' | 'manual_only',
   min_messages: 4,
-  idle_timeout_ms: 30000,
   auto_inject: true,
   vector_enabled: false,
   embedding_provider_id: null as string | null,
@@ -143,7 +93,9 @@ function saveKnowledgeConfigDebounced() {
     try {
       const { loaded, ...cfg } = knowledgeConfig
       void loaded
-      await knowledgeApi.saveConfig(cfg as any)
+      // cfg 形态与后端 KnowledgeConfig 对齐(auto_extract/trigger_mode/min_messages/
+      // auto_inject/vector_enabled/embedding_provider_id/embedding_model),无需 as any
+      await knowledgeApi.saveConfig(cfg)
     } catch (e) {
       console.error('保存知识库配置失败:', e)
     }
@@ -158,6 +110,27 @@ watch(
   { deep: true },
 )
 
+// 即时生效反馈:SettingRow refs(embedding 两项 v-if 条件渲染,可能未挂载,?. 安全)
+const rowAutoExtract = useTemplateRef<InstanceType<typeof SettingRow>>('rowAutoExtract')
+const rowTriggerMode = useTemplateRef<InstanceType<typeof SettingRow>>('rowTriggerMode')
+const rowMinMessages = useTemplateRef<InstanceType<typeof SettingRow>>('rowMinMessages')
+const rowAutoInject = useTemplateRef<InstanceType<typeof SettingRow>>('rowAutoInject')
+const rowVectorEnabled = useTemplateRef<InstanceType<typeof SettingRow>>('rowVectorEnabled')
+const rowEmbeddingProvider = useTemplateRef<InstanceType<typeof SettingRow>>('rowEmbeddingProvider')
+const rowEmbeddingModel = useTemplateRef<InstanceType<typeof SettingRow>>('rowEmbeddingModel')
+function markSaved(key: 'autoExtract' | 'triggerMode' | 'minMessages' | 'autoInject' | 'vectorEnabled' | 'embeddingProvider' | 'embeddingModel') {
+  const map = {
+    autoExtract: rowAutoExtract.value,
+    triggerMode: rowTriggerMode.value,
+    minMessages: rowMinMessages.value,
+    autoInject: rowAutoInject.value,
+    vectorEnabled: rowVectorEnabled.value,
+    embeddingProvider: rowEmbeddingProvider.value,
+    embeddingModel: rowEmbeddingModel.value,
+  }
+  map[key]?.markSaved()
+}
+
 onMounted(() => {
   loadKnowledgeConfig()
 })
@@ -169,45 +142,6 @@ onUnmounted(() => {
 </script>
 
 <style scoped>
-/* ===== 面板容器(原 Settings.vue 抽出,各子组件自持 scoped 副本) ===== */
-.panel {
-  background: var(--df-bg-card);
-  border: 0.5px solid var(--df-border);
-  border-radius: var(--df-radius-lg);
-  padding: var(--df-pad-panel);
-}
-.panel-header {
-  display: flex;
-  justify-content: space-between;
-  align-items: center;
-  margin-bottom: var(--df-gap-head);
-}
-.panel-header h2 { font-size: 15px; font-weight: 500; }
-
-/* ===== 通用设置行(Knowledge 复用 setting-row 布局) ===== */
-.general-settings { display: flex; flex-direction: column; }
-.setting-row {
-  display: flex;
-  justify-content: space-between;
-  align-items: center;
-  padding: 14px 0;
-  border-bottom: 0.5px solid var(--df-border);
-}
-.setting-row:last-child { border-bottom: none; }
-.setting-info { display: flex; flex-direction: column; gap: 2px; }
-.setting-label { font-size: 14px; font-weight: 500; color: var(--df-text); }
-.setting-desc { font-size: 12px; color: var(--df-text-dim); }
-
-.setting-control { display: flex; align-items: center; }
-
-.setting-select { padding: 6px 12px; background: var(--df-bg); border: 0.5px solid var(--df-border); border-radius: var(--df-radius-sm); color: var(--df-text); font-size: 13px; outline: none; cursor: pointer; min-width: 160px; }
-.setting-select:focus { border-color: var(--df-accent); }
-
-/* Toggle */
-.toggle { position: relative; display: inline-block; width: 40px; height: 22px; cursor: pointer; }
-.toggle input { opacity: 0; width: 0; height: 0; }
-.toggle-slider { position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: var(--df-border); border-radius: var(--df-radius-lg); transition: background 0.2s; }
-.toggle-slider::before { content: ''; position: absolute; width: 16px; height: 16px; left: 3px; bottom: 3px; background: var(--df-text-dim); border-radius: 50%; transition: transform 0.2s, background 0.2s; }
-.toggle input:checked + .toggle-slider { background: var(--df-accent); }
-.toggle input:checked + .toggle-slider::before { transform: translateX(18px); background: #fff; }
+/* 阶段1 UX 重构:共用样式抽至 src/components/settings/settings.css 全局。
+   阶段5:行布局封装进 SettingRow(本 Panel 无特有 scoped 样式)。 */
 </style>
diff --git a/src/components/settings/PerformanceSection.vue b/src/components/settings/PerformanceSection.vue
new file mode 100644
index 0000000..efd1111
--- /dev/null
+++ b/src/components/settings/PerformanceSection.vue
@@ -0,0 +1,231 @@
+<template>
+  <!-- ═══ 性能设置(全局并发 / 单对话并发 / Agent 最大轮次 / 流式重试)═══ -->
+  <section class="panel">
+    <div class="panel-header">
+      <h2>{{ $t('settings.sectionPerformance') }}</h2>
+    </div>
+    <div class="general-settings">
+      <SettingRow
+        ref="rowGlobalConcurrency"
+        next-round
+        :label="$t('settings.labelGlobalConcurrency')"
+        :desc="$t('settings.descGlobalConcurrency')">
+        <input type="number" class="setting-select" min="1" style="width:80px"
+               v-model.number="settings.llmGlobalConcurrency"
+               @change="onConcurrencyChange" />
+      </SettingRow>
+      <SettingRow
+        ref="rowPerConvConcurrency"
+        next-round
+        :label="$t('settings.labelPerConvConcurrency')"
+        :desc="$t('settings.descPerConvConcurrency')">
+        <input type="number" class="setting-select" min="1" style="width:80px"
+               v-model.number="settings.llmPerConvConcurrency"
+               @change="onConcurrencyChange" />
+      </SettingRow>
+      <SettingRow
+        ref="rowMaxIterations"
+        next-round
+        :label="$t('settings.labelAgentMaxIterations')"
+        :desc="$t('settings.descAgentMaxIterations')">
+        <label class="unlimited-toggle">
+          <input type="checkbox" v-model="unlimited" @change="markSaved('iter')" />
+          <span>{{ $t('settings.labelUnlimited') }}</span>
+        </label>
+        <input type="number" class="setting-select" min="1" max="50" style="width:80px"
+               v-model.number="settings.agentMaxIterations"
+               :disabled="unlimited"
+               @change="onIterChange" />
+      </SettingRow>
+      <SettingRow
+        ref="rowMaxRetries"
+        next-round
+        :label="$t('settings.labelAgentMaxRetries')"
+        :desc="$t('settings.descAgentMaxRetries')">
+        <input type="number" class="setting-select" min="0" max="10" style="width:80px"
+               v-model.number="settings.agentMaxRetries"
+               @change="onRetryChange" />
+      </SettingRow>
+    </div>
+  </section>
+</template>
+
+<script setup lang="ts">
+import { reactive, watch, computed, onMounted, onUnmounted, useTemplateRef } from 'vue'
+import { aiApi } from '@/api'
+import { useAppSettingsStore } from '@/stores/appSettings'
+import SettingRow from './SettingRow.vue'
+
+// ============================================================
+// 性能域 — 本地设置(localStorage):LLM 并发 / 单对话并发 / Agent 轮次 / 流式重试
+// 拆自 GeneralPanel,本 Section 仅持有性能相关 key + 各自 debounce IPC 同步
+// 阶段5:SettingRow 封装行布局 + nextRound badge(后端快照锁定边界,下次对话生效);
+//        4 项变更后调 markSaved 显"已保存"
+// ============================================================
+const appSettings = useAppSettingsStore()
+
+const settings = reactive({
+  llmGlobalConcurrency: appSettings.get<number>('df-llm-global-concurrency', 3),
+  llmPerConvConcurrency: appSettings.get<number>('df-llm-per-conv-concurrency', 2),
+  // F-260616-01: Agentic 循环最大轮次，默认 10（与后端 DEFAULT_MAX_AGENT_ITERATIONS 对齐）
+  agentMaxIterations: appSettings.get<number>('df-ai-agent-max-iterations', 10),
+  // F-260616-07: 流式失败重试次数，默认 3（与后端 DEFAULT_MAX_AGENT_RETRIES 对齐）
+  agentMaxRetries: appSettings.get<number>('df-ai-agent-max-retries', 3),
+})
+
+// 即时生效反馈:SettingRow refs
+const rowGlobalConcurrency = useTemplateRef<InstanceType<typeof SettingRow>>('rowGlobalConcurrency')
+const rowPerConvConcurrency = useTemplateRef<InstanceType<typeof SettingRow>>('rowPerConvConcurrency')
+const rowMaxIterations = useTemplateRef<InstanceType<typeof SettingRow>>('rowMaxIterations')
+const rowMaxRetries = useTemplateRef<InstanceType<typeof SettingRow>>('rowMaxRetries')
+function markSaved(key: 'global' | 'perConv' | 'iter' | 'retry') {
+  const map = { global: rowGlobalConcurrency.value, perConv: rowPerConvConcurrency.value, iter: rowMaxIterations.value, retry: rowMaxRetries.value }
+  map[key]?.markSaved()
+}
+
+watch(() => settings.llmGlobalConcurrency, (v) => {
+  void appSettings.set('df-llm-global-concurrency', v)
+})
+
+watch(() => settings.llmPerConvConcurrency, (v) => {
+  void appSettings.set('df-llm-per-conv-concurrency', v)
+})
+
+watch(() => settings.agentMaxIterations, (v) => {
+  void appSettings.set('df-ai-agent-max-iterations', v)
+})
+
+watch(() => settings.agentMaxRetries, (v) => {
+  void appSettings.set('df-ai-agent-max-retries', v)
+})
+
+// onMounted 期间调 sync 不应触发"已保存"反馈(那是启动恢复,非用户改动)
+let _userInteracting = false
+
+// 同步 LLM 并发上限到后端(debounce 300ms,防快速连续调整时频繁 IPC)
+// 持久化已由上方 watch 写 appSettings(SQLite) 完成;此处只负责同步内存限流器
+let _concurrencyTimer: ReturnType<typeof setTimeout> | null = null
+function syncConcurrencyConfig() {
+  // clamp 到合理区间,防越界输入(缓存被篡改 / 手动输超限)致限流失效;
+  // 修正后值同步回 v-model(input 显示) + watch 持久化
+  // 下限 1,无上限;约束单对话并发不超过全局并发
+  settings.llmGlobalConcurrency = Math.max(1, settings.llmGlobalConcurrency || 3)
+  settings.llmPerConvConcurrency = Math.max(1, settings.llmPerConvConcurrency || 2)
+  if (settings.llmPerConvConcurrency > settings.llmGlobalConcurrency) {
+    settings.llmPerConvConcurrency = settings.llmGlobalConcurrency
+  }
+  if (_concurrencyTimer) clearTimeout(_concurrencyTimer)
+  _concurrencyTimer = setTimeout(async () => {
+    try {
+      await aiApi.setConcurrencyConfig(settings.llmGlobalConcurrency, settings.llmPerConvConcurrency)
+    } catch (e) {
+      console.error('同步 LLM 并发配置失败:', e)
+    }
+  }, 300)
+  if (_userInteracting) {
+    markSaved('global')
+    markSaved('perConv')
+  }
+}
+
+// wrapper:并发变更(@change 用户触发)同时反馈两项(global/perConv 任一变动都同步两项)
+function onConcurrencyChange() {
+  _userInteracting = true
+  syncConcurrencyConfig()
+  _userInteracting = false
+}
+// wrapper:轮次 @change 用户触发,走 _userInteracting 守卫显反馈(onMounted 启动同步不显)
+function onIterChange() {
+  _userInteracting = true
+  syncAgentMaxIterations()
+  _userInteracting = false
+}
+// wrapper:重试 @change 用户触发,走 _userInteracting 守卫显反馈
+function onRetryChange() {
+  _userInteracting = true
+  syncAgentMaxRetries()
+  _userInteracting = false
+}
+
+// 同步 Agentic 最大轮次到后端(debounce 300ms)
+// F-260616-01: 后端 loop 入口 load 快照锁定边界——热改后当前 loop 不受影响，
+// 下次发消息才生效（与 llm_concurrency 传 Arc 实时反映的区别）。
+// 双 clamp：此处 1-50 + 后端 command 再 clamp 1-50，防越界输入致 loop 失效/失控
+let _agentIterTimer: ReturnType<typeof setTimeout> | null = null
+function syncAgentMaxIterations() {
+  // 0=不限透传;否则 clamp 1-50 防越界(过小致 agent 失能、过大致烧 token)
+  if (settings.agentMaxIterations !== 0) {
+    settings.agentMaxIterations = Math.min(50, Math.max(1, settings.agentMaxIterations || 10))
+  }
+  if (_agentIterTimer) clearTimeout(_agentIterTimer)
+  _agentIterTimer = setTimeout(async () => {
+    try {
+      await aiApi.setAgentMaxIterations(settings.agentMaxIterations)
+    } catch (e) {
+      console.error('同步 Agent 最大轮次失败:', e)
+    }
+  }, 300)
+  if (_userInteracting) {
+    markSaved('iter')
+  }
+}
+
+// 「不限」勾选:agentMaxIterations===0 即不限(后端 0→usize::MAX,loop 靠 stop/收敛/审批退出)
+const unlimited = computed({
+  get: () => settings.agentMaxIterations === 0,
+  set(v: boolean) {
+    if (v) {
+      settings.agentMaxIterations = 0
+    } else if (settings.agentMaxIterations === 0) {
+      settings.agentMaxIterations = 10
+    }
+    syncAgentMaxIterations()
+  },
+})
+
+// 同步流式失败重试次数到后端(debounce 300ms)
+// F-260616-07: 后端 loop 入口 load 快照锁定边界——热改后当前 loop 不受影响，
+// 下次发消息才生效。双 clamp：此处 0-10 + 后端 command 再 clamp 0-10
+let _agentRetryTimer: ReturnType<typeof setTimeout> | null = null
+function syncAgentMaxRetries() {
+  // clamp 0-10，防越界
+  settings.agentMaxRetries = Math.min(10, Math.max(0, settings.agentMaxRetries ?? 3))
+  if (_agentRetryTimer) clearTimeout(_agentRetryTimer)
+  _agentRetryTimer = setTimeout(async () => {
+    try {
+      await aiApi.setAgentMaxRetries(settings.agentMaxRetries)
+    } catch (e) {
+      console.error('同步流式重试次数失败:', e)
+    }
+  }, 300)
+  if (_userInteracting) {
+    markSaved('retry')
+  }
+}
+
+onMounted(() => {
+  // 启动同步一次 LLM 并发配置（防刷新页面后后端未恢复用户设定值）
+  syncConcurrencyConfig()
+  // F-260616-01: 启动同步一次 Agentic 最大轮次（防刷新页面后后端未恢复用户设定值）
+  // F-260618-23: App.vue 根 onMounted 已在应用启动时恢复（覆盖用户没先进 Settings 直接用 AI Chat 的场景），
+  // 此处保留双保险（IPC 幂等值相同无害）
+  syncAgentMaxIterations()
+  // F-260616-07: 启动同步一次流式失败重试次数（防刷新页面后后端未恢复用户设定值）
+  // F-260618-23: 同上，App.vue 根 onMounted 已恢复，此处双保险保留
+  syncAgentMaxRetries()
+})
+
+// 组件卸载清全部 debounce timer,防 unmount 后旧 timer 仍 fire 写已销毁 reactive(timer 泄漏 FR-C3)
+onUnmounted(() => {
+  if (_concurrencyTimer) clearTimeout(_concurrencyTimer)
+  if (_agentIterTimer) clearTimeout(_agentIterTimer)
+  if (_agentRetryTimer) clearTimeout(_agentRetryTimer)
+})
+</script>
+
+<style scoped>
+/* 阶段5 UX 重构:复用 settings.css 全局 .panel/.panel-header/.general-settings/
+   .setting-select + SettingRow(封装 .setting-row/.setting-info/.setting-label/
+   .setting-desc/.setting-control + nextRound badge)。本 Section 无特有 scoped 样式
+   (.unlimited-toggle 沿用默认 label)。 */
+</style>
diff --git a/src/components/settings/ProviderPanel.vue b/src/components/settings/ProviderPanel.vue
index 6772765..61470fb 100644
--- a/src/components/settings/ProviderPanel.vue
+++ b/src/components/settings/ProviderPanel.vue
@@ -127,7 +127,7 @@
 </template>
 
 <script setup lang="ts">
-import { reactive, ref } from 'vue'
+import { reactive, ref, onMounted } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { aiApi } from '@/api'
 import { useAiStore } from '@/stores/ai'
@@ -337,39 +337,26 @@ function maskKey(key: string): string {
   return key.slice(0, 4) + '••••••••' + key.slice(-4)
 }
 
-/** 暴露给 shell:onMounted 拉取 / Knowledge 读 embeddingProviders / 卸载清 timer */
+/** 暴露给 shell:loadProviders 供外部主动刷新 / Knowledge 读 aiProviders / 卸载清 timer */
 defineExpose({
   aiProviders,
   loadProviders,
   clearPoolTimer() { if (_poolTimer) clearTimeout(_poolTimer) },
 })
+
+// 阶段3 UX 重构:本面板改为 ai-model 类懒挂载,不再由 Settings.vue onMounted 调用,
+// 改为自身挂载时拉取 provider 列表 + 同步 aiStore。
+onMounted(loadProviders)
 </script>
 
 <style scoped>
-/* ===== 面板容器(原 Settings.vue 抽出,各子组件自持 scoped 副本) ===== */
-.panel {
-  background: var(--df-bg-card);
-  border: 0.5px solid var(--df-border);
-  border-radius: var(--df-radius-lg);
-  padding: var(--df-pad-panel);
-}
-.panel-header {
-  display: flex;
-  justify-content: space-between;
-  align-items: center;
-  margin-bottom: var(--df-gap-head);
-}
-.panel-header h2 { font-size: 15px; font-weight: 500; }
-.empty-hint { font-size: 13px; color: var(--df-text-dim); padding: 12px 0; }
+/* 阶段1/3 UX 重构:panel/panel-header/empty-hint/btn 系列/setting-select/
+   toggle/toggle-slider 已迁移到 settings.css 全局。
+   本 scoped 仅保留 ProviderPanel 特有样式:provider-card/default-badge/
+   pool-badge/detail 系列/form 系列/setting-input/btn-link/toggle--sm 等。
+   注:注释内勿用斜杠分隔类名列表(会误闭合 CSS 注释)。
 
-/* ===== 按钮 ===== */
-.btn { padding: 8px 16px; border: none; border-radius: var(--df-radius-sm); font-size: 13px; cursor: pointer; transition: all 0.15s; }
-.btn-primary { background: var(--df-accent); color: #fff; }
-.btn-primary:hover { background: var(--df-accent-hover); }
-.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
-.btn-ghost { background: transparent; color: var(--df-text-secondary); border: 0.5px solid var(--df-border); }
-.btn-ghost:hover { background: var(--df-bg-card); color: var(--df-text); }
-.btn-sm { padding: 4px 12px; font-size: 12px; }
+/* ===== 链接按钮(本面板特有,未进全局) ===== */
 .btn-link { background: none; border: none; color: var(--df-accent); font-size: 12px; cursor: pointer; padding: 2px 6px; }
 .btn-link:hover { text-decoration: underline; }
 .btn-link-danger { color: var(--df-danger); }
@@ -434,7 +421,7 @@ defineExpose({
 .detail-value--control { display: flex; align-items: center; gap: 8px; font-family: var(--df-font-mono); }
 .pool-weight-hint { font-size: 11px; color: var(--df-text-dim); }
 
-/* 表单 */
+/* 表单(本面板特有输入控件样式;.setting-select 走全局) */
 .form-grid { display: flex; flex-direction: column; gap: 14px; }
 .form-field { display: flex; flex-direction: column; gap: 4px; }
 .form-label { font-size: 12px; font-weight: 500; color: var(--df-text-secondary); }
@@ -443,16 +430,8 @@ defineExpose({
 .setting-input { padding: 6px 12px; background: var(--df-bg); border: 0.5px solid var(--df-border); border-radius: var(--df-radius-sm); color: var(--df-text); font-size: 13px; outline: none; min-width: 260px; }
 .setting-input:focus { border-color: var(--df-accent); }
 .setting-input--sm { min-width: 0; width: 70px; padding: 4px 8px; font-size: 12px; }
-.setting-select { padding: 6px 12px; background: var(--df-bg); border: 0.5px solid var(--df-border); border-radius: var(--df-radius-sm); color: var(--df-text); font-size: 13px; outline: none; cursor: pointer; min-width: 160px; }
-.setting-select:focus { border-color: var(--df-accent); }
 
-/* Toggle */
-.toggle { position: relative; display: inline-block; width: 40px; height: 22px; cursor: pointer; }
-.toggle input { opacity: 0; width: 0; height: 0; }
-.toggle-slider { position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: var(--df-border); border-radius: var(--df-radius-lg); transition: background 0.2s; }
-.toggle-slider::before { content: ''; position: absolute; width: 16px; height: 16px; left: 3px; bottom: 3px; background: var(--df-text-dim); border-radius: 50%; transition: transform 0.2s, background 0.2s; }
-.toggle input:checked + .toggle-slider { background: var(--df-accent); }
-.toggle input:checked + .toggle-slider::before { transform: translateX(18px); background: #fff; }
+/* Toggle 小号变体(本面板负载均衡池用;.toggle 基础走全局) */
 .toggle--sm { width: 32px; height: 18px; }
 .toggle--sm .toggle-slider::before { width: 12px; height: 12px; left: 3px; bottom: 3px; }
 .toggle--sm input:checked + .toggle-slider::before { transform: translateX(14px); }
diff --git a/src/components/settings/SettingRow.vue b/src/components/settings/SettingRow.vue
new file mode 100644
index 0000000..7e442e0
--- /dev/null
+++ b/src/components/settings/SettingRow.vue
@@ -0,0 +1,84 @@
+<template>
+  <!-- ═══ 统一设置行(UX 重构阶段5):封装 label/desc + control slot + 即时生效反馈 ═══ -->
+  <div class="setting-row">
+    <div class="setting-info">
+      <span class="setting-label">
+        {{ label }}
+        <span v-if="nextRound" class="next-round-badge">{{ $t('settings.nextRoundBadge') }}</span>
+      </span>
+      <span v-if="desc" class="setting-desc">{{ desc }}</span>
+    </div>
+    <div class="setting-control">
+      <slot />
+      <Transition name="saved-fade">
+        <span v-if="savedVisible" class="saved-hint">{{ $t('settings.savedHint') }}</span>
+      </Transition>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { shallowRef } from 'vue'
+
+// ============================================================
+// 统一设置行:label/desc 入 props,控件走默认 slot,变更后父级调 markSaved() 显反馈。
+// nextRound=true 显"下次对话生效" badge(性能域并发/轮次/重试白名单项)。
+// savedVisible 用 shallowRef(布尔翻转无深响应需求);timer ref 持有供连续触发时清旧。
+// ============================================================
+defineProps<{
+  /** 设置项标题 */
+  label: string
+  /** 设置项描述(可空,如 toggle 无需描述) */
+  desc?: string
+  /** 是否显示"下次对话生效" badge(后端快照锁定边界的设置项,如并发/轮次/重试) */
+  nextRound?: boolean
+}>()
+
+const savedVisible = shallowRef(false)
+const timer = shallowRef<ReturnType<typeof setTimeout> | null>(null)
+
+/** 显"✓已保存"行内提示,2s 后消失。连续触发清旧 timer 防提前消失。 */
+function markSaved() {
+  savedVisible.value = true
+  if (timer.value) clearTimeout(timer.value)
+  timer.value = setTimeout(() => {
+    savedVisible.value = false
+    timer.value = null
+  }, 2000)
+}
+
+defineExpose({ markSaved })
+</script>
+
+<style scoped>
+/* 反馈位"✓已保存" — 行内紧贴控件右侧,2s 淡出 */
+.saved-hint {
+  margin-left: 10px;
+  font-size: 12px;
+  color: var(--df-accent);
+  white-space: nowrap;
+}
+/* badge"下次对话生效" — label 右侧小标 */
+.next-round-badge {
+  display: inline-block;
+  margin-left: 8px;
+  padding: 1px 6px;
+  font-size: 11px;
+  font-weight: 400;
+  color: var(--df-text-dim);
+  background: var(--df-bg);
+  border: 0.5px solid var(--df-border);
+  border-radius: var(--df-radius-sm);
+  vertical-align: middle;
+}
+
+/* Transition:淡入淡出 */
+.saved-fade-enter-active,
+.saved-fade-leave-active {
+  transition: opacity 0.25s ease;
+}
+.saved-fade-enter-from,
+.saved-fade-leave-to {
+  opacity: 0;
+}
+</style>
diff --git a/src/components/settings/SettingsImportExport.vue b/src/components/settings/SettingsImportExport.vue
new file mode 100644
index 0000000..06325a7
--- /dev/null
+++ b/src/components/settings/SettingsImportExport.vue
@@ -0,0 +1,233 @@
+<template>
+  <!-- ═══ 设置导入 / 导出(阶段6 UX 重构)═══
+       导出:聚合 appSettings 全 KV(已解析)+ 知识库配置 → JSON 文件下载
+            (默认不含 provider keyring 密钥,scope 标注)
+       导入:input[type=file] 读 JSON → 解析校验 → useConfirm 覆盖确认
+            → 逐 KV settings.set + knowledgeApi.saveConfig → toast 提示
+       复用 settings.css 全局 .btn/.btn-primary/.btn-ghost/.btn-sm;
+       confirm/toast 由父 Settings.vue 经 props 注入,共用壳层弹层与 toast。 -->
+  <div class="settings-io">
+    <button class="btn btn-ghost btn-sm" :disabled="busy" @click="onExport">
+      ⬆ {{ $t('settings.export') }}
+    </button>
+    <button class="btn btn-ghost btn-sm" :disabled="busy" @click="triggerImport">
+      ⬇ {{ $t('settings.import') }}
+    </button>
+    <!-- 隐藏的文件选择器(点击「导入」触发) -->
+    <input
+      ref="fileInputRef"
+      type="file"
+      accept="application/json,.json"
+      class="file-input"
+      @change="onFilePicked"
+    />
+  </div>
+</template>
+
+<script setup lang="ts">
+// ============================================================
+// 阶段6 导入 / 导出 — 纯前端实现
+// ------------------------------------------------------------
+// 导出:从 appSettings.cache 取已解析的全 KV(类型正确,非后端原始 JSON 字符串),
+//   叠加 knowledgeApi.getConfig(),组成 {metadata, appSettings, knowledge} JSON。
+//   用 Blob + a[download] 下载(不依赖 Tauri fs/dialog 权限)。
+// 导入:<input type=file> + FileReader.readAsText → 解析 → metadata.scope 校验
+//   → confirmDialog 覆盖确认 → appSettings.set 逐 KV + knowledgeApi.saveConfig
+//   → toast 反馈(并发/轮次需重启或下次对话生效)。
+// 安全:scope 仅含 appSettings + 知识库配置,默认不含 provider keyring 密钥
+//   (密钥在独立 store,本流程不触及)。
+// ============================================================
+
+import { ref } from 'vue'
+import { useI18n } from 'vue-i18n'
+import { useAppSettingsStore } from '@/stores/appSettings'
+import { knowledgeApi } from '@/api/knowledge'
+import type { KnowledgeConfig } from '@/api/types'
+
+const props = defineProps<{
+  /** 覆盖确认弹层(复用 Settings.vue 壳层 confirmState) */
+  confirmDialog: (msg: string, dangerLabel?: string) => Promise<boolean>
+  /** toast 反馈通道(复用 Settings.vue 壳层 showToast) */
+  toast: (msg: string, type?: 'error' | 'warning' | 'info') => void
+}>()
+
+const { t } = useI18n()
+const appSettings = useAppSettingsStore()
+
+const busy = ref(false)
+const fileInputRef = ref<HTMLInputElement | null>(null)
+
+/** 导出的 JSON 备份载荷结构 */
+interface SettingsBackup {
+  metadata: {
+    version: number
+    date: string
+    scope: 'appSettings+knowledge'
+    app: string
+  }
+  appSettings: Record<string, unknown>
+  knowledge: KnowledgeConfig | null
+}
+
+/** 当前日期戳(用于导出文件名:devflow-settings-YYYYMMDD.json) */
+function dateStamp(): string {
+  const d = new Date()
+  const y = d.getFullYear()
+  const m = String(d.getMonth() + 1).padStart(2, '0')
+  const day = String(d.getDate()).padStart(2, '0')
+  return `${y}${m}${day}`
+}
+
+// ============================================================
+// 导出
+// ============================================================
+async function onExport() {
+  if (busy.value) return
+  busy.value = true
+  try {
+    // appSettings.cache 为已解析(反序列化)值的响应式缓存 —— 取其快照,
+    // 保证导出的 JSON 值类型与运行时一致(非后端原始 JSON 字符串)
+    const allKv: Record<string, unknown> = { ...appSettings.cache }
+    // 知识库配置独立 IPC 读取(不在 app_settings 表)
+    let knowledge: KnowledgeConfig | null = null
+    try {
+      knowledge = await knowledgeApi.getConfig()
+    } catch (e) {
+      // 知识库读取失败不阻断导出(appSettings 仍可导),仅 console 记录
+      console.error('[设置导出] 读取知识库配置失败:', e)
+    }
+
+    const payload: SettingsBackup = {
+      metadata: {
+        version: 1,
+        date: new Date().toISOString(),
+        scope: 'appSettings+knowledge',
+        app: 'devflow',
+      },
+      appSettings: allKv,
+      knowledge,
+    }
+
+    const json = JSON.stringify(payload, null, 2)
+    // Blob + a[download] 下载:webview 内原生支持,无需 Tauri fs 权限
+    const blob = new Blob([json], { type: 'application/json' })
+    const url = URL.createObjectURL(blob)
+    const a = document.createElement('a')
+    a.href = url
+    a.download = `devflow-settings-${dateStamp()}.json`
+    document.body.appendChild(a)
+    a.click()
+    document.body.removeChild(a)
+    URL.revokeObjectURL(url)
+  } catch (e) {
+    props.toast(t('settings.exportFail', { msg: errMsg(e) }), 'error')
+  } finally {
+    busy.value = false
+  }
+}
+
+// ============================================================
+// 导入
+// ============================================================
+function triggerImport() {
+  // 重置 value 以便「选同一文件」也能再次触发 change(否则 onChange 不再回调)
+  if (fileInputRef.value) fileInputRef.value.value = ''
+  fileInputRef.value?.click()
+}
+
+async function onFilePicked(e: Event) {
+  const input = e.target as HTMLInputElement
+  const file = input.files?.[0]
+  if (!file) return
+
+  if (busy.value) return
+  busy.value = true
+  try {
+    const text = await readFileAsText(file)
+    const parsed = parseJsonLoose(text)
+    if (!parsed || !isSettingsBackup(parsed)) {
+      props.toast(t('settings.importInvalidJson'), 'error')
+      return
+    }
+
+    // 覆盖确认(复用壳层 confirmState 弹层;用户取消则放弃)
+    const ok = await props.confirmDialog(t('settings.importConfirm'), '')
+    if (!ok) return
+
+    // 逐 KV 写回 appSettings(经 store.set 同时更新缓存与 debounced 落库)
+    const kv = parsed.appSettings ?? {}
+    for (const [k, v] of Object.entries(kv)) {
+      await appSettings.set(k, v)
+    }
+    // 知识库配置写回(独立 IPC)
+    if (parsed.knowledge) {
+      await knowledgeApi.saveConfig(parsed.knowledge)
+    }
+
+    props.toast(t('settings.importSuccess'), 'info')
+  } catch (e) {
+    props.toast(t('settings.importFail', { msg: errMsg(e) }), 'error')
+  } finally {
+    busy.value = false
+  }
+}
+
+// ============================================================
+// 工具
+// ============================================================
+
+/** FileReader 读文本(替代 file.text() 以兼容更早 webview) */
+function readFileAsText(file: File): Promise<string> {
+  return new Promise((resolve, reject) => {
+    const reader = new FileReader()
+    reader.onload = () => resolve(String(reader.result ?? ''))
+    reader.onerror = () => reject(reader.error ?? new Error('read error'))
+    reader.readAsText(file)
+  })
+}
+
+/** 宽松 JSON.parse:失败返回 null(调用方据此报「格式不符」) */
+function parseJsonLoose(text: string): unknown {
+  try {
+    return JSON.parse(text)
+  } catch {
+    return null
+  }
+}
+
+/** 结构校验:必须含 metadata.scope === 'appSettings+knowledge' 且 version 为数 */
+function isSettingsBackup(obj: unknown): obj is SettingsBackup {
+  if (typeof obj !== 'object' || obj === null) return false
+  const o = obj as Record<string, unknown>
+  const meta = o.metadata as Record<string, unknown> | undefined
+  if (!meta || meta.scope !== 'appSettings+knowledge') return false
+  if (typeof meta.version !== 'number') return false
+  // appSettings 必须为对象(允许空对象);knowledge 允许 null 或对象
+  if (typeof o.appSettings !== 'object' || o.appSettings === null) return false
+  return true
+}
+
+/** 提取错误信息文案(兜底 Error.message 或 String(e)) */
+function errMsg(e: unknown): string {
+  if (e instanceof Error) return e.message
+  return String(e)
+}
+</script>
+
+<style scoped>
+/* 导入导出按钮组:横向排列,复用全局 .btn/.btn-ghost/.btn-sm */
+.settings-io {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+  width: 100%;
+}
+/* 隐藏文件选择器(仅以编程方式 click 触发) */
+.file-input {
+  position: absolute;
+  width: 0;
+  height: 0;
+  opacity: 0;
+  pointer-events: none;
+}
+</style>
diff --git a/src/components/settings/SettingsNav.vue b/src/components/settings/SettingsNav.vue
new file mode 100644
index 0000000..d09dcaf
--- /dev/null
+++ b/src/components/settings/SettingsNav.vue
@@ -0,0 +1,276 @@
+<template>
+  <!-- ═══ 设置左导航(master-detail 左栏)═══
+       阶段3 UX 重构:6 类导航(外观/AI模型/知识库/性能/安全/高级)+ emoji 图标。
+       阶段4 UX 重构:顶部搜索框 → 匹配 label/desc → 高亮匹配类 + 选中首匹配类
+       + emit scroll-target(父 Settings.vue 滚动到对应 setting-row)。
+       activeCategory 受控(双向),v-model 由 Settings.vue 绑定 + appSettings 持久化。
+       底部留导入导出占位(阶段6 接入)。 -->
+  <nav class="settings-nav" :class="{ 'is-horizontal': horizontal }">
+    <!-- 顶部搜索框(阶段4) -->
+    <div v-if="!horizontal" class="nav-search">
+      <span class="search-icon">🔍</span>
+      <input
+        v-model="searchKeyword"
+        class="search-input"
+        type="text"
+        :placeholder="$t('settings.searchPlaceholder')"
+      />
+      <!-- 无匹配时显「无结果」提示(非空关键词且零命中) -->
+      <span v-if="searchKeyword.trim() && matchedCategories.length === 0" class="search-no-result">
+        {{ $t('settings.searchNoResult') }}
+      </span>
+    </div>
+
+    <!-- 分类列表 -->
+    <ul class="nav-list">
+      <li
+        v-for="cat in categories"
+        :key="cat.value"
+        class="nav-item"
+        :class="{
+          'nav-item--active': cat.value === modelValue,
+          'nav-item--matched': isMatchedCategory(cat.value),
+        }"
+        @click="$emit('update:modelValue', cat.value)"
+      >
+        <span class="nav-icon">{{ cat.icon }}</span>
+        <span class="nav-label">{{ $t(cat.labelKey) }}</span>
+      </li>
+    </ul>
+
+    <!-- 底部导入导出占位(阶段6 实现) -->
+    <div class="nav-footer-slot">
+      <slot name="footer" />
+    </div>
+  </nav>
+</template>
+
+<script setup lang="ts">
+// ============================================================
+// 左导航 — 静态分类定义 + 受控 activeCategory(v-model) + 搜索(阶段4)
+// 分类按用户任务域划分(对齐 plan 设置项分类映射):
+//   appearance  外观(theme/language/aiLanguage/showTokenUsage)
+//   ai-model    AI 模型(provider 列表 + 负载均衡池 + 模型拉取)
+//   knowledge   知识库(auto_extract/trigger_mode/embedding_*)
+//   performance 性能(global/per-conv concurrency/max-iterations/max-retries)
+//   security    安全(allowed_dirs)
+//   advanced    高级(autoExecute/logLevel + 连接)
+// ============================================================
+
+import { computed, ref, watch } from 'vue'
+import { useI18n } from 'vue-i18n'
+import { SETTINGS_INDEX, type SettingsCategory, type SettingIndexEntry } from './searchIndex'
+
+// re-export SettingsCategory 供 Settings.vue import(类型定义迁至 searchIndex.ts
+// 避免组件 ↔ 索引文件循环导入)
+export type { SettingsCategory }
+
+interface NavCategory {
+  value: SettingsCategory
+  icon: string
+  labelKey: string
+}
+
+const categories: NavCategory[] = [
+  { value: 'appearance', icon: '🎨', labelKey: 'settings.navAppearance' },
+  { value: 'ai-model', icon: '🤖', labelKey: 'settings.navAiModel' },
+  { value: 'knowledge', icon: '📚', labelKey: 'settings.navKnowledge' },
+  { value: 'performance', icon: '⚡', labelKey: 'settings.navPerformance' },
+  { value: 'security', icon: '🔒', labelKey: 'settings.navSecurity' },
+  { value: 'advanced', icon: '⚙️', labelKey: 'settings.navAdvanced' },
+]
+
+const props = defineProps<{
+  /** 当前激活分类(v-model) */
+  modelValue: SettingsCategory
+  /** 窄屏横向 tab 模式(由父 Settings.vue 据 @media 控制) */
+  horizontal?: boolean
+}>()
+
+const emit = defineEmits<{
+  (e: 'update:modelValue', value: SettingsCategory): void
+  /** 搜索命中首匹配项时上抛,父 Settings.vue 据此滚动右侧 setting-row */
+  (e: 'scroll-target', key: string): void
+}>()
+
+// ============================================================
+// 搜索(阶段4)
+// ------------------------------------------------------------
+// 索引项的 label/desc 用当前 locale 翻译成文本,小写 includes 模糊匹配。
+// matchedCategories:命中项去重后的分类集合(左导航高亮)。
+// 首匹配项变化时(输入/选中分类切换)→ emit scroll-target,父组件滚动定位。
+// ============================================================
+const { t } = useI18n()
+const searchKeyword = ref('')
+
+/** 判定单条索引项是否命中关键词(label + desc 文本,小写 includes) */
+function matchEntry(entry: SettingIndexEntry, kw: string): boolean {
+  const label = t(entry.labelKey)
+  const desc = entry.descKey ? t(entry.descKey) : ''
+  const hay = `${label} ${desc}`.toLowerCase()
+  return hay.includes(kw)
+}
+
+/** 当前关键词命中的全部索引项(去 locale 文本匹配) */
+const matchedEntries = computed<SettingIndexEntry[]>(() => {
+  const kw = searchKeyword.value.trim().toLowerCase()
+  if (!kw) return []
+  return SETTINGS_INDEX.filter((e) => matchEntry(e, kw))
+})
+
+/** 命中项去重后的分类集合(左导航高亮) */
+const matchedCategories = computed<SettingsCategory[]>(() => {
+  const set = new Set<SettingsCategory>()
+  for (const e of matchedEntries.value) set.add(e.category)
+  return [...set]
+})
+
+/** 分类是否在匹配集中(模板高亮用) */
+function isMatchedCategory(cat: SettingsCategory): boolean {
+  if (!searchKeyword.value.trim()) return false
+  return matchedCategories.value.includes(cat)
+}
+
+/** 关键词变化 → 选中首匹配类 + 上抛首匹配项 key(触发右侧滚动定位)。
+ *  空关键词时不改 activeCategory(用户清空搜索应留在当前类),也不上抛。 */
+watch(
+  () => searchKeyword.value,
+  (kw) => {
+    const trimmed = kw.trim()
+    if (!trimmed) return
+    const first = matchedEntries.value[0]
+    if (!first) return
+    if (props.modelValue !== first.category) {
+      emit('update:modelValue', first.category)
+    }
+    // 分类切换后需等右侧 Section 挂载,父组件 watch scroll-target 时自带 nextTick
+    emit('scroll-target', first.key)
+  },
+)
+
+defineExpose({
+  /** 清空搜索框(父组件切分类时可调用,但当前保留搜索状态便于用户继续搜) */
+  clearSearch() {
+    searchKeyword.value = ''
+  },
+})
+</script>
+
+<style scoped>
+/* 左导航容器:固定宽度 ~200px,纵向 flex(search 顶 / list 中 flex 占满 / footer 底) */
+.settings-nav {
+  display: flex;
+  flex-direction: column;
+  width: 200px;
+  flex-shrink: 0;
+  gap: 12px;
+}
+
+/* ===== 搜索框(阶段4) =====
+   宽度跟随 nav(200px),相对定位承载无结果提示浮层。 */
+.nav-search {
+  position: relative;
+  display: flex;
+  align-items: center;
+  flex-shrink: 0;
+}
+.search-icon {
+  position: absolute;
+  left: 8px;
+  font-size: 12px;
+  pointer-events: none;
+  opacity: 0.7;
+}
+.search-input {
+  width: 100%;
+  padding: 6px 10px 6px 26px;
+  background: var(--df-bg);
+  border: 0.5px solid var(--df-border);
+  border-radius: var(--df-radius-sm);
+  color: var(--df-text);
+  font-size: 12px;
+  outline: none;
+  transition: border-color 0.15s;
+}
+.search-input:focus { border-color: var(--df-accent); }
+.search-input::placeholder { color: var(--df-text-dim); }
+/* 无结果提示:浮在搜索框右下,小字 + 红色提示 */
+.search-no-result {
+  position: absolute;
+  top: 100%;
+  right: 0;
+  margin-top: 2px;
+  font-size: 11px;
+  color: var(--df-danger);
+  white-space: nowrap;
+}
+
+.nav-list {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+
+.nav-item {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding: 8px 12px;
+  border-radius: var(--df-radius-sm);
+  cursor: pointer;
+  font-size: 13px;
+  color: var(--df-text-secondary);
+  transition: background 0.15s, color 0.15s;
+  user-select: none;
+}
+.nav-item:hover {
+  background: var(--df-bg-card);
+  color: var(--df-text);
+}
+.nav-item--active {
+  background: var(--df-accent-bg);
+  color: var(--df-accent);
+  font-weight: 500;
+}
+.nav-item--active:hover {
+  background: var(--df-accent-bg);
+  color: var(--df-accent);
+}
+/* 搜索命中类高亮(左侧色条 + 强调色),即便非当前选中也提示用户该类有匹配 */
+.nav-item--matched {
+  box-shadow: inset 2px 0 0 var(--df-accent);
+  color: var(--df-text);
+}
+.nav-item--matched.nav-item--active {
+  color: var(--df-accent);
+}
+
+.nav-icon { font-size: 16px; line-height: 1; }
+.nav-label { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
+
+.nav-footer-slot { flex-shrink: 0; margin-top: auto; }
+
+/* ===== 窄屏响应式:nav 折叠为横向 tab(@media 由父 Settings.vue 控制,
+   此处仅保证横向模式下 nav-item 排列正确)。窄屏不显搜索框(横向空间不足,
+   搜索改为后续可扩展) ===== */
+.settings-nav.is-horizontal {
+  width: 100%;
+  flex-direction: column;
+}
+.settings-nav.is-horizontal .nav-list {
+  flex-direction: row;
+  overflow-x: auto;
+  gap: 4px;
+}
+.settings-nav.is-horizontal .nav-item {
+  flex-shrink: 0;
+}
+/* 横向模式下命中色条改下边框(左侧 inset 阴影在横向 tab 不显眼) */
+.settings-nav.is-horizontal .nav-item--matched {
+  box-shadow: none;
+  border-bottom: 2px solid var(--df-accent);
+}
+</style>
diff --git a/src/components/settings/searchIndex.ts b/src/components/settings/searchIndex.ts
new file mode 100644
index 0000000..6ff9c8b
--- /dev/null
+++ b/src/components/settings/searchIndex.ts
@@ -0,0 +1,88 @@
+// ============================================================
+// 设置项搜索索引(阶段4 UX 重构)
+// ------------------------------------------------------------
+// 静态表:覆盖全部设置项,每项绑定 i18n label/desc key(运行时按当前 locale
+// 翻译成文本做匹配)。新增设置项时同步此索引,避免索引与设置项漂移(对齐 plan
+// 阶段4 风险项)。分类 value 与 SettingsNav SettingsCategory 一致。
+//
+// 匹配维度:label + desc(当前 locale 翻译值),小写 includes 模糊匹配。
+// 搜索命中 → 左导航高亮匹配类 + 选中首匹配类 + 右侧滚动到对应 setting-row
+// (靠 setting-row 上的 data-setting-key 属性定位,见 SettingsNav + Settings.vue)。
+// ============================================================
+
+/** 分类值类型 — 与 Settings.vue 渲染分支 + SettingsNav categories 一致。
+ *  定义在此处(纯 .ts,无循环导入),SettingsNav.vue re-export 以兼容现有引用。 */
+export type SettingsCategory =
+  | 'appearance'
+  | 'ai-model'
+  | 'knowledge'
+  | 'performance'
+  | 'security'
+  | 'advanced'
+
+/** 搜索索引项:category 所属分类 + labelKey/descKey(i18n key) + key 唯一标识 */
+export interface SettingIndexEntry {
+  /** 所属分类(与左导航 SettingsCategory 一致) */
+  category: SettingsCategory
+  /** 设置项 label 的 i18n key(如 'settings.labelTheme') */
+  labelKey: string
+  /** 设置项 desc 的 i18n key(可空,部分项仅有 label) */
+  descKey?: string
+  /** 唯一标识,对应右侧 setting-row 上 data-setting-key(用于 scrollIntoView 定位) */
+  key: string
+}
+
+/**
+ * 设置项静态索引 —— 覆盖全部 6 类设置项。
+ * 分类映射(对齐 plan):
+ *   appearance  外观(theme/language/aiLanguage/showTokenUsage)
+ *   ai-model    AI 模型(provider 列表 / 负载均衡池 / 模型拉取)
+ *   knowledge   知识库(auto_extract/trigger_mode/min_messages/auto_inject/
+ *               vector_enabled/embedding_provider/embedding_model)
+ *   performance 性能(global-concurrency/per-conv-concurrency/
+ *               max-iterations/max-retries)
+ *   security    安全(allowed_dirs)
+ *   advanced    高级(autoExecute/logLevel + 连接)
+ */
+export const SETTINGS_INDEX: SettingIndexEntry[] = [
+  // ===== 外观 =====
+  { category: 'appearance', key: 'theme', labelKey: 'settings.labelTheme', descKey: 'settings.descTheme' },
+  { category: 'appearance', key: 'language', labelKey: 'settings.labelLanguage', descKey: 'settings.descLanguage' },
+  { category: 'appearance', key: 'aiLanguage', labelKey: 'settings.labelAiLanguage', descKey: 'settings.descAiLanguage' },
+  { category: 'appearance', key: 'showTokenUsage', labelKey: 'settings.labelShowTokenUsage', descKey: 'settings.descShowTokenUsage' },
+  // 加固(索引漂移):streamingMd 在 AppearanceSection.vue 渲染(AR-1 流式 Markdown 渲染开关),
+  // 此前漏入索引 → 搜索"流式/markdown/渲染"无法命中该项。补入 appearance 类与渲染处对齐。
+  { category: 'appearance', key: 'streamingMd', labelKey: 'settings.labelStreamingMd', descKey: 'settings.descStreamingMd' },
+
+  // ===== AI 模型(provider 卡片级设置在 ProviderPanel 动态渲染,此处索引面板标题 +
+  //   负载均衡池/模型拉取等关键交互项,i18n 文案可被关键词命中) =====
+  { category: 'ai-model', key: 'provider', labelKey: 'settings.panelAiProvider' },
+  { category: 'ai-model', key: 'addProvider', labelKey: 'settings.addProvider' },
+  { category: 'ai-model', key: 'poolEnabled', labelKey: 'settings.detailPoolEnabled', descKey: 'settings.descPoolEnabled' },
+  { category: 'ai-model', key: 'poolWeight', labelKey: 'settings.detailPoolWeight', descKey: 'settings.descPoolWeight' },
+  { category: 'ai-model', key: 'testConnection', labelKey: 'settings.testConnection' },
+  { category: 'ai-model', key: 'modelList', labelKey: 'settings.modelListTitle' },
+
+  // ===== 知识库 =====
+  { category: 'knowledge', key: 'autoExtract', labelKey: 'settings.labelAutoExtract', descKey: 'settings.descAutoExtract' },
+  { category: 'knowledge', key: 'triggerMode', labelKey: 'settings.labelTriggerMode', descKey: 'settings.descTriggerMode' },
+  { category: 'knowledge', key: 'minMessages', labelKey: 'settings.labelMinMessages', descKey: 'settings.descMinMessages' },
+  { category: 'knowledge', key: 'autoInject', labelKey: 'settings.labelAutoInject', descKey: 'settings.descAutoInject' },
+  { category: 'knowledge', key: 'vectorEnabled', labelKey: 'settings.labelVectorEnabled', descKey: 'settings.descVectorEnabled' },
+  { category: 'knowledge', key: 'embeddingProvider', labelKey: 'settings.labelEmbeddingProvider', descKey: 'settings.descEmbeddingProvider' },
+  { category: 'knowledge', key: 'embeddingModel', labelKey: 'settings.labelEmbeddingModel', descKey: 'settings.descEmbeddingModel' },
+
+  // ===== 性能 =====
+  { category: 'performance', key: 'globalConcurrency', labelKey: 'settings.labelGlobalConcurrency', descKey: 'settings.descGlobalConcurrency' },
+  { category: 'performance', key: 'perConvConcurrency', labelKey: 'settings.labelPerConvConcurrency', descKey: 'settings.descPerConvConcurrency' },
+  { category: 'performance', key: 'agentMaxIterations', labelKey: 'settings.labelAgentMaxIterations', descKey: 'settings.descAgentMaxIterations' },
+  { category: 'performance', key: 'agentMaxRetries', labelKey: 'settings.labelAgentMaxRetries', descKey: 'settings.descAgentMaxRetries' },
+
+  // ===== 安全 =====
+  { category: 'security', key: 'allowedDirs', labelKey: 'settings.panelAllowedDirs', descKey: 'settings.descAllowedDirs' },
+
+  // ===== 高级 =====
+  { category: 'advanced', key: 'autoExecute', labelKey: 'settings.labelAutoExecute', descKey: 'settings.descAutoExecute' },
+  { category: 'advanced', key: 'logLevel', labelKey: 'settings.labelLogLevel', descKey: 'settings.descLogLevel' },
+  { category: 'advanced', key: 'connection', labelKey: 'settings.panelConnection', descKey: 'settings.emptyConnection' },
+]
diff --git a/src/components/settings/settings.css b/src/components/settings/settings.css
new file mode 100644
index 0000000..62008d5
--- /dev/null
+++ b/src/components/settings/settings.css
@@ -0,0 +1,69 @@
+/* DevFlow 设置统一组件库(UX 重构阶段1)
+   各 Panel scoped 副本抽取到全局,消除 panel/setting 系列/toggle/btn 5/5+3/5 重复。
+   来源基准:GeneralPanel/KnowledgePanel scoped(已确认 CSS 一致)。
+   各 Panel scoped 仅保留特有样式:provider-card/dir-row/connection-card 等。 */
+
+/* ===== 面板容器(5/5 Panel 重复) ===== */
+.panel {
+  background: var(--df-bg-card);
+  border: 0.5px solid var(--df-border);
+  border-radius: var(--df-radius-lg);
+  padding: var(--df-pad-panel);
+}
+.panel-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: var(--df-gap-head);
+}
+.panel-header h2 { font-size: 15px; font-weight: 500; }
+
+/* ===== 设置行容器(表单型 Panel 共用) ===== */
+.general-settings { display: flex; flex-direction: column; }
+.setting-row {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 14px 0;
+  border-bottom: 0.5px solid var(--df-border);
+}
+.setting-row:last-child { border-bottom: none; }
+.setting-info { display: flex; flex-direction: column; gap: 2px; }
+.setting-label { font-size: 14px; font-weight: 500; color: var(--df-text); }
+.setting-desc { font-size: 12px; color: var(--df-text-dim); }
+.setting-control { display: flex; align-items: center; }
+
+/* ===== 控件(5/5 Panel 重复) ===== */
+.setting-select {
+  padding: 6px 12px;
+  background: var(--df-bg);
+  border: 0.5px solid var(--df-border);
+  border-radius: var(--df-radius-sm);
+  color: var(--df-text);
+  font-size: 13px;
+  outline: none;
+  cursor: pointer;
+  min-width: 160px;
+}
+.setting-select:focus { border-color: var(--df-accent); }
+
+/* Toggle(3/5 Panel 重复) */
+.toggle { position: relative; display: inline-block; width: 40px; height: 22px; cursor: pointer; }
+.toggle input { opacity: 0; width: 0; height: 0; }
+.toggle-slider { position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: var(--df-border); border-radius: var(--df-radius-lg); transition: background 0.2s; }
+.toggle-slider::before { content: ''; position: absolute; width: 16px; height: 16px; left: 3px; bottom: 3px; background: var(--df-text-dim); border-radius: 50%; transition: transform 0.2s, background 0.2s; }
+.toggle input:checked + .toggle-slider { background: var(--df-accent); }
+.toggle input:checked + .toggle-slider::before { transform: translateX(18px); background: #fff; }
+
+/* ===== 按钮(原 Settings.vue,列表型 Panel 共用) ===== */
+.btn { padding: 8px 16px; border: none; border-radius: var(--df-radius-sm); font-size: 13px; cursor: pointer; transition: all 0.15s; }
+.btn-primary { background: var(--df-accent); color: #fff; }
+.btn-primary:hover { background: var(--df-accent-hover); }
+.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
+.btn-ghost { background: transparent; color: var(--df-text-secondary); border: 0.5px solid var(--df-border); }
+.btn-ghost:hover { background: var(--df-bg-card); color: var(--df-text); }
+.btn-ghost:disabled { opacity: 0.5; cursor: not-allowed; }
+.btn-sm { padding: 4px 12px; font-size: 12px; }
+
+/* ===== 空提示(列表型 Panel 共用) ===== */
+.empty-hint { color: var(--df-text-dim); font-size: 13px; padding: 16px 0; text-align: center; }
diff --git a/src/i18n/en/settings.ts b/src/i18n/en/settings.ts
index 315ff9c..bb8584d 100644
--- a/src/i18n/en/settings.ts
+++ b/src/i18n/en/settings.ts
@@ -3,6 +3,25 @@ export default {
     // ===== Page title =====
     title: '⚙️ Settings',
 
+    // ===== Left nav categories (phase 3 master-detail) =====
+    navAppearance: 'Appearance',
+    navAiModel: 'AI Models',
+    navKnowledge: 'Knowledge',
+    navPerformance: 'Performance',
+    navSecurity: 'Security',
+    navAdvanced: 'Advanced',
+
+    // ===== Settings search (phase 4) =====
+    searchPlaceholder: 'Search settings…',
+    searchNoResult: 'No results',
+
+    // ===== Instant feedback (phase 5 SettingRow) =====
+    savedHint: '✓ Saved',
+    nextRoundBadge: 'Next message',
+
+    // ===== Connection mgmt (phase 7: experimental badge, not wired to AI yet) =====
+    experimentalBadge: 'Experimental · not wired to AI tools',
+
     // ===== AI Provider panel =====
     panelAiProvider: '🤖 AI Model Config',
     addProvider: '+ Add Provider',
@@ -73,6 +92,10 @@ export default {
 
     // ===== General settings panel =====
     panelGeneral: '🎨 General',
+    // 阶段2 UX 重构:GeneralPanel 拆 3 Section 后各 Section 标题
+    sectionAppearance: '🎨 Appearance',
+    sectionPerformance: '⚡ Performance',
+    sectionAdvanced: '⚙️ Advanced',
     labelTheme: 'Theme',
     descTheme: 'Dark / light',
     themeDark: '🌙 Dark',
@@ -97,6 +120,9 @@ export default {
     labelShowTokenUsage: 'Show token usage',
     descShowTokenUsage: 'Show token consumption of each reply in conversations',
 
+    labelStreamingMd: 'Streaming Markdown rendering',
+    descStreamingMd: 'Render code blocks/lists/headings during streaming (unclosed code blocks degrade to plain text to avoid flicker); when off, only plain text is shown during streaming and full formatting applies after generation completes',
+
     labelGlobalConcurrency: 'Global max concurrency',
     descGlobalConcurrency: 'Shared cap on simultaneous LLM requests across all conversations',
 
@@ -104,7 +130,8 @@ export default {
     descPerConvConcurrency: 'Concurrent LLM calls within one conversation (main loop / title / distill shared)',
 
     labelAgentMaxIterations: 'Agent max iterations',
-    descAgentMaxIterations: 'Max rounds of the agentic loop (stream → tool → feedback) (1-50, default 10); changes take effect on the next message',
+    descAgentMaxIterations: 'Max rounds of the agentic loop (stream → tool → feedback) (0=unlimited, 1-50, default 10); changes take effect on the next message',
+    labelUnlimited: 'Unlimited',
 
     labelAgentMaxRetries: 'Stream failure retries',
     descAgentMaxRetries: 'Auto-retry count on stream failure (0-10, default 3); only retries pre-stream failures (no token output yet); mid-stream failures are abandoned',
@@ -131,12 +158,9 @@ export default {
     labelTriggerMode: 'Distill trigger',
     descTriggerMode: 'When auto-distillation is triggered',
     triggerOnComplete: 'On conversation complete',
-    triggerOnIdle: 'On conversation idle',
     triggerManualOnly: 'Manual only',
     labelMinMessages: 'Min message count',
     descMinMessages: 'Distillation triggers only after this many messages (filters out small talk noise)',
-    labelIdleTimeout: 'Idle timeout (s)',
-    descIdleTimeout: 'Seconds to wait in idle-trigger mode',
     labelAutoInject: 'Auto-inject related knowledge',
     descAutoInject: 'Retrieve related knowledge and inject it into the conversation context during chat',
     labelVectorEnabled: 'Semantic retrieval (vector)',
@@ -159,6 +183,18 @@ export default {
     toastSetDefaultFail: 'Failed to set default: {msg}',
     toastConnIncomplete: 'Please fill in Name and Host',
 
+    // ===== Import / Export (phase 6) =====
+    export: 'Export',
+    import: 'Import',
+    exportHint: 'Export all preferences (appSettings + knowledge config) as a JSON file',
+    importHint: 'Import from a JSON file and overwrite current preferences',
+    importConfirm: 'Importing will overwrite all current preferences (appearance / performance / knowledge, etc.). Continue?',
+    importSuccess: 'Imported successfully (some items like concurrency / iterations take effect after restart or next message)',
+    importFail: 'Import failed: {msg}',
+    exportFail: 'Export failed: {msg}',
+    importInvalidJson: 'The file is not a valid DevFlow settings backup (wrong format)',
+    importScopeNote: 'Scope: appSettings + knowledge config (no provider keys)',
+
     // ===== Confirm dialogs =====
     confirmDeleteProvider: 'Delete provider "{name}"? This cannot be undone.',
     confirmDeleteConn: 'Delete connection "{name}"?',
diff --git a/src/i18n/zh-CN/settings.ts b/src/i18n/zh-CN/settings.ts
index 4610ddc..7b7ff62 100644
--- a/src/i18n/zh-CN/settings.ts
+++ b/src/i18n/zh-CN/settings.ts
@@ -3,6 +3,25 @@ export default {
     // ===== 页面标题 =====
     title: '⚙️ 设置',
 
+    // ===== 左导航分类(阶段3 master-detail) =====
+    navAppearance: '外观',
+    navAiModel: 'AI 模型',
+    navKnowledge: '知识库',
+    navPerformance: '性能',
+    navSecurity: '安全',
+    navAdvanced: '高级',
+
+    // ===== 设置搜索(阶段4) =====
+    searchPlaceholder: '搜索设置项…',
+    searchNoResult: '无结果',
+
+    // ===== 即时生效反馈(阶段5 SettingRow) =====
+    savedHint: '✓ 已保存',
+    nextRoundBadge: '下次对话生效',
+
+    // ===== 连接管理(阶段7:实验功能 badge 明示暂未接入 AI) =====
+    experimentalBadge: '实验功能·暂未接入 AI 工具',
+
     // ===== AI 模型配置面板 =====
     panelAiProvider: '🤖 AI 模型配置',
     addProvider: '+ 添加 Provider',
@@ -73,6 +92,10 @@ export default {
 
     // ===== 通用设置面板 =====
     panelGeneral: '🎨 通用设置',
+    // 阶段2 UX 重构:GeneralPanel 拆 3 Section 后各 Section 标题
+    sectionAppearance: '🎨 外观',
+    sectionPerformance: '⚡ 性能',
+    sectionAdvanced: '⚙️ 高级',
     labelTheme: '主题',
     descTheme: '深色 / 浅色模式',
     themeDark: '🌙 深色模式',
@@ -97,6 +120,9 @@ export default {
     labelShowTokenUsage: '显示 Token 用量',
     descShowTokenUsage: '在对话中展示每次回复的 token 消耗',
 
+    labelStreamingMd: '流式 Markdown 渲染',
+    descStreamingMd: '流式生成过程中渲染代码块/列表/标题格式(未闭合代码块降级纯文本防闪烁);关闭后流式期间仅显纯文本,生成完成后才渲染完整格式',
+
     labelGlobalConcurrency: '全局最大并发',
     descGlobalConcurrency: '所有对话共享的 LLM 同时请求数上限',
 
@@ -104,7 +130,8 @@ export default {
     descPerConvConcurrency: '单个对话内同时进行的 LLM 调用数（主循环 / 标题 / 提炼共享）',
 
     labelAgentMaxIterations: 'Agent 最大轮次',
-    descAgentMaxIterations: 'Agentic 循环（流式→工具→回传）的最大轮次（1-50，默认 10）；热改下次发消息生效',
+    descAgentMaxIterations: 'Agentic 循环（流式→工具→回传）的最大轮次（0=不限，1-50，默认 10）；热改下次发消息生效',
+    labelUnlimited: '不限',
 
     labelAgentMaxRetries: '流式失败重试次数',
     descAgentMaxRetries: '流式对话失败时自动重试次数（0-10，默认 3）；只重试未输出任何 token 的流前失败，已输出文本的失败直接放弃',
@@ -131,12 +158,9 @@ export default {
     labelTriggerMode: '提炼触发方式',
     descTriggerMode: '自动提炼的触发时机',
     triggerOnComplete: '对话完成后',
-    triggerOnIdle: '对话闲置后',
     triggerManualOnly: '仅手动',
     labelMinMessages: '最少消息数',
     descMinMessages: '对话达到此消息数才触发提炼(防闲聊噪音)',
-    labelIdleTimeout: '闲置超时(秒)',
-    descIdleTimeout: '闲置触发模式下等待的秒数',
     labelAutoInject: '自动注入相关知识',
     descAutoInject: '聊天时自动检索相关知识注入对话上下文',
     labelVectorEnabled: '语义检索(向量)',
@@ -159,6 +183,18 @@ export default {
     toastSetDefaultFail: '设置默认失败：{msg}',
     toastConnIncomplete: '请填写名称和 Host',
 
+    // ===== 导入 / 导出(阶段6) =====
+    export: '导出',
+    import: '导入',
+    exportHint: '导出全部偏好(appSettings + 知识库配置)为 JSON 文件',
+    importHint: '从 JSON 文件导入并覆盖当前偏好',
+    importConfirm: '导入将覆盖当前的全部偏好设置(外观 / 性能 / 知识库等),确定继续?',
+    importSuccess: '导入成功(部分项如并发 / 轮次需重启或下次对话生效)',
+    importFail: '导入失败:{msg}',
+    exportFail: '导出失败:{msg}',
+    importInvalidJson: '文件不是有效的 DevFlow 设置备份(格式不符)',
+    importScopeNote: '范围:appSettings + 知识库配置(不含 Provider 密钥)',
+
     // ===== 确认弹层 =====
     confirmDeleteProvider: '确定删除提供商「{name}」？该操作不可恢复。',
     confirmDeleteConn: '确定删除连接「{name}」？',
diff --git a/src/main.ts b/src/main.ts
index 941afff..063d5a3 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -5,6 +5,7 @@ import i18n from "./i18n";
 import "./styles/global.css";
 import "./styles/ai-md.css";
 import "./styles/components.css";
+import "./components/settings/settings.css"; // UX 重构阶段1:设置统一组件库全局
 
 const app = createApp(App);
 
diff --git a/src/views/Settings.vue b/src/views/Settings.vue
index d36542f..7fca2e4 100644
--- a/src/views/Settings.vue
+++ b/src/views/Settings.vue
@@ -19,47 +19,84 @@
       <h1>{{ $t('settings.title') }}</h1>
     </header>
 
-    <div class="settings-grid">
-      <!-- ═══ AI 提供商(列表 + 表单)+ F-04c 负载均衡池 ═══ -->
-      <ProviderPanel
-        ref="providerPanelRef"
-        :confirm-dialog="confirmDialog"
-        @toast="showToast"
-        @providers-changed="onProvidersChanged"
-      />
+    <!-- ═══ master-detail 布局(阶段3 UX 重构)═══
+         左 SettingsNav(~200px 固定):6 类导航,activeCategory 受控 + appSettings 持久化
+         右 content(scroll):按 activeCategory 渲染对应 Section/Panel -->
+    <div class="settings-body">
+      <SettingsNav
+        v-model="activeCategory"
+        :horizontal="isNarrowScreen"
+        @scroll-target="scrollToSettingItem"
+      >
+        <!-- 底部导入/导出(阶段6):窄屏横向模式不显,避免横向 tab 拥挤 -->
+        <template v-if="!isNarrowScreen" #footer>
+          <SettingsImportExport :confirm-dialog="confirmDialog" :toast="showToast" />
+        </template>
+      </SettingsNav>
 
-      <!-- ═══ 连接管理(localStorage CRUD)═══ -->
-      <ConnectionPanel
-        ref="connectionPanelRef"
-        :confirm-dialog="confirmDialog"
-        @toast="showToast"
-      />
+      <div ref="contentRef" class="settings-content">
+        <!-- 外观:theme/language/aiLanguage/showTokenUsage -->
+        <AppearanceSection v-if="activeCategory === 'appearance'" />
 
-      <!-- ═══ 通用设置(主题/语言/并发/Agent 轮次 — 即时调 IPC)═══ -->
-      <GeneralPanel />
+        <!-- AI 模型:provider 列表 + 负载均衡池 + 模型拉取 -->
+        <ProviderPanel
+          v-else-if="activeCategory === 'ai-model'"
+          ref="providerPanelRef"
+          :confirm-dialog="confirmDialog"
+          @toast="showToast"
+          @providers-changed="onProvidersChanged"
+        />
 
-      <!-- ═══ 知识库配置(后端 IPC,embedding provider 依赖 ProviderPanel 列表)═══ -->
-      <KnowledgePanel :ai-providers="aiProviders" />
+        <!-- 知识库:auto_extract/trigger_mode/embedding_* -->
+        <KnowledgePanel
+          v-else-if="activeCategory === 'knowledge'"
+          :ai-providers="aiProviders"
+        />
 
-      <!-- ═══ F-260619-03 Phase A: AI 工具授权目录(白名单持久化)═══ -->
-      <AllowedDirsPanel @toast="showToast" />
+        <!-- 性能:global/per-conv concurrency/max-iterations/max-retries -->
+        <PerformanceSection v-else-if="activeCategory === 'performance'" />
+
+        <!-- 安全:allowed_dirs -->
+        <AllowedDirsPanel
+          v-else-if="activeCategory === 'security'"
+          @toast="showToast"
+        />
+
+        <!-- 高级:autoExecute/logLevel + 连接(暂留待定) -->
+        <template v-else-if="activeCategory === 'advanced'">
+          <AdvancedSection />
+          <ConnectionPanel
+            ref="connectionPanelRef"
+            :confirm-dialog="confirmDialog"
+            @toast="showToast"
+          />
+        </template>
+      </div>
     </div>
   </div>
 </template>
 
 <script setup lang="ts">
-import { reactive, ref, shallowRef, onMounted, onUnmounted } from 'vue'
+import { computed, reactive, ref, shallowRef, onMounted, onUnmounted, nextTick } from 'vue'
 import { useConfirm } from '@/composables/useConfirm'
+import SettingsNav, { type SettingsCategory } from '@/components/settings/SettingsNav.vue'
 import ProviderPanel from '@/components/settings/ProviderPanel.vue'
 import ConnectionPanel from '@/components/settings/ConnectionPanel.vue'
-import GeneralPanel from '@/components/settings/GeneralPanel.vue'
+import AppearanceSection from '@/components/settings/AppearanceSection.vue'
+import PerformanceSection from '@/components/settings/PerformanceSection.vue'
+import AdvancedSection from '@/components/settings/AdvancedSection.vue'
 import KnowledgePanel from '@/components/settings/KnowledgePanel.vue'
 import AllowedDirsPanel from '@/components/settings/AllowedDirsPanel.vue'
+import SettingsImportExport from '@/components/settings/SettingsImportExport.vue'
+import { useAppSettingsStore } from '@/stores/appSettings'
+import { aiApi } from '@/api'
 import type { AiProviderConfig } from '@/api/types'
+import { SETTINGS_INDEX } from '@/components/settings/searchIndex'
+import { t as ti18n } from '@/i18n/i18n-helpers'
 
 // ============================================================
-// Settings 壳 — toast/confirm 共享 UI + 组合 4 子面板
-// (纯重构零功能:各功能域 state/methods/CSS 已拆到子组件)
+// Settings 壳 — toast/confirm 共享 UI + master-detail 布局组合各 Section/Panel
+// (阶段3 UX 重构:左导航 + 右按 activeCategory 渲染,各功能域 state/methods 已拆到子组件)
 // ============================================================
 
 // 顶部轻量提示（错误/警告/完成），3s 自动消失；零依赖，替代未接入的 Arco Message
@@ -82,22 +119,108 @@ const { confirmState, confirmDialog, answerConfirm } = useConfirm()
 const providerPanelRef = shallowRef<InstanceType<typeof ProviderPanel> | null>(null)
 const connectionPanelRef = shallowRef<InstanceType<typeof ConnectionPanel> | null>(null)
 
-// KnowledgePanel embedding provider 下拉依赖 ProviderPanel 的 aiProviders
-// ProviderPanel loadProviders 后上抛 providers-changed,此处同步本地副本
+// ============================================================
+// master-detail:activeCategory 持久化(appSettings,默认 appearance)
+// 用 computed 包 useSetting,双向绑 SettingsNav v-model
+// ============================================================
+const appSettings = useAppSettingsStore()
+const activeCategory = computed<SettingsCategory>({
+  get: () => appSettings.get<SettingsCategory>('df-settings-active-category', 'appearance'),
+  set: (v) => { void appSettings.set('df-settings-active-category', v) },
+})
+
+// 窄屏响应式:监听窗口宽度,nav 折叠为横向 tab(避免依赖仅 CSS 的 :has,
+// 并让 SettingsNav 按横向模式渲染 list)
+const isNarrowScreen = ref(false)
+function syncNarrow() {
+  isNarrowScreen.value = window.innerWidth <= 768
+}
+let _resizeTimer: ReturnType<typeof setTimeout> | null = null
+function onResize() {
+  if (_resizeTimer) clearTimeout(_resizeTimer)
+  _resizeTimer = setTimeout(syncNarrow, 100)
+}
+
+// ============================================================
+// 设置搜索滚动定位(阶段4)
+// ------------------------------------------------------------
+// SettingsNav 搜索命中首匹配项时上抛 scroll-target(key)。
+// 此处据 key 查 SETTINGS_INDEX 取 labelKey → t() 得当前 locale 文本,
+// 在右侧内容 DOM 中找匹配文本的 .setting-label(表单型 Section)或
+// .panel-header h2(列表型面板如 ProviderPanel),scrollIntoView 平滑定位。
+// 用文本匹配而非 data-* 属性:避免改动各 Section(严守"仅改 plan 列出文件")。
+// ============================================================
+const contentRef = ref<HTMLElement | null>(null)
+
+function scrollToSettingItem(itemKey: string) {
+  const entry = SETTINGS_INDEX.find((e) => e.key === itemKey)
+  if (!entry) return
+  // 用 i18n-helpers 的 t(规避 vue-i18n 动态 key 的 TS2589,见 i18n-helpers.ts 注释)
+  const labelText = ti18n(entry.labelKey)
+  // 等右侧对应 Section v-if 切换后挂载(nextTick);再用二次 rAF 确保布局就绪
+  void nextTick(() => {
+    requestAnimationFrame(() => {
+      const root = contentRef.value
+      if (!root) return
+      // 优先 .setting-label 文本(表单型);退而求 .panel-header h2(面板标题)
+      const labels = root.querySelectorAll<HTMLElement>('.setting-label')
+      let target: HTMLElement | null = null
+      for (const el of labels) {
+        if (el.textContent?.trim() === labelText.trim()) {
+          target = el.closest<HTMLElement>('.setting-row') ?? el
+          break
+        }
+      }
+      if (!target) {
+        const headers = root.querySelectorAll<HTMLElement>('.panel-header h2')
+        for (const el of headers) {
+          if (el.textContent?.trim() === labelText.trim()) {
+            target = el
+            break
+          }
+        }
+      }
+      if (target) {
+        target.scrollIntoView({ behavior: 'smooth', block: 'center' })
+      }
+    })
+  })
+}
+
+// ============================================================
+// KnowledgePanel embedding provider 下拉依赖 provider 列表。
+// 阶段3 改 master-detail 后 ProviderPanel 仅在 ai-model 类挂载,
+// knowledge 类切到时 ProviderPanel 可能未挂载 → 此处独立拉一次 providers
+// 保证 KnowledgePanel 始终拿到 embedding provider 候选(与 ProviderPanel 自身
+// onMounted loadProviders 互补,后者仅刷新 UI 列表 + aiStore)。
+// ============================================================
 const aiProviders = ref<AiProviderConfig[]>([])
 
+async function loadAiProviders() {
+  try {
+    aiProviders.value = await aiApi.listProviders()
+  } catch (e) {
+    console.error('加载 AI 提供商失败:', e)
+  }
+}
+
 function onProvidersChanged() {
-  aiProviders.value = providerPanelRef.value?.aiProviders ?? []
+  // ProviderPanel 自己 reload 后上抛,优先取其内存副本(最新),失败回退此处独立拉
+  aiProviders.value = providerPanelRef.value?.aiProviders ?? aiProviders.value
 }
 
 onMounted(() => {
-  providerPanelRef.value?.loadProviders()
-  connectionPanelRef.value?.loadConnections()
+  syncNarrow()
+  window.addEventListener('resize', onResize)
+  // provider 列表预拉(knowledge 类依赖);connection 列表 advanced 类挂载时自载
+  void loadAiProviders()
 })
 
-// 组件卸载清 toast timer;各子面板自管自身 debounce timer(各自 onUnmounted)
+// 组件卸载清 toast/resize timer;各子面板自管自身 debounce timer(各自 onUnmounted)
 onUnmounted(() => {
   if (_toastTimer) clearTimeout(_toastTimer)
+  if (_resizeTimer) clearTimeout(_resizeTimer)
+  window.removeEventListener('resize', onResize)
   providerPanelRef.value?.clearPoolTimer()
 })
 </script>
@@ -157,30 +280,30 @@ onUnmounted(() => {
 }
 .page-header h1 { font-size: 24px; font-weight: 500; color: var(--df-text); }
 
-/* ===== 按钮 ===== */
-.btn {
-  padding: 8px 16px;
-  border: none;
-  border-radius: var(--df-radius-sm);
-  font-size: 13px;
-  cursor: pointer;
-  transition: all 0.15s;
+/* ===== master-detail 布局(阶段3 UX 重构) =====
+   左 SettingsNav(~200px 固定)+ 右 content(flex 占满 + 纵向滚动)。
+   nav 宽度/折叠由 SettingsNav scoped 控制;此处仅布局骨架。 */
+.settings-body {
+  display: flex;
+  gap: 20px;
+  align-items: flex-start;
 }
-.btn-primary { background: var(--df-accent); color: #fff; }
-.btn-primary:hover { background: var(--df-accent-hover); }
-.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
-.btn-ghost { background: transparent; color: var(--df-text-secondary); border: 0.5px solid var(--df-border); }
-.btn-ghost:hover { background: var(--df-bg-card); color: var(--df-text); }
-.btn-sm { padding: 4px 12px; font-size: 12px; }
-
-/* ===== 设置网格 ===== */
-.settings-grid {
+.settings-content {
+  flex: 1;
+  min-width: 0;  /* 允许收缩,防子面板溢出撑破 flex */
   display: flex;
   flex-direction: column;
   gap: var(--df-gap-grid);
 }
 
-/* 注:.panel / .panel-header / .empty-hint 等子组件内元素的样式
-   已随功能域拆到各子组件 scoped(父 scoped 无法穿透命中子组件根 section),
-   各子组件自带面板容器 + 按钮基础样式副本,确保零视觉变化。 */
+/* .btn / .btn-primary / .btn-ghost / .btn-sm 已迁移到 settings.css 全局,
+   本壳的 toast/confirm 内联按钮沿用全局基础样式;此处仅保留全局未定义的 .btn-danger。 */
+
+/* ===== 窄屏响应式:nav 折叠为顶部横向 tab(由 SettingsNav is-horizontal 渲染) ===== */
+@media (max-width: 768px) {
+  .settings-body {
+    flex-direction: column;
+    gap: 12px;
+  }
+}
 </style>