diff --git a/mobile-uni/src/components/chat/AskSourceHeader.vue b/mobile-uni/src/components/chat/AskSourceHeader.vue
new file mode 100644
index 00000000..167c9cf4
--- /dev/null
+++ b/mobile-uni/src/components/chat/AskSourceHeader.vue
@@ -0,0 +1,156 @@
+<template>
+  <view class="ask-source-head">
+    <view class="head-row">
+      <text class="head-title">问 · 数字师傅</text>
+      <view class="head-actions">
+        <text class="head-context">{{ context }}</text>
+        <button class="new-chat-button" :disabled="loading" @click="emit('newConversation')">新对话</button>
+      </view>
+    </view>
+    <view class="source-switch" aria-label="问答来源">
+      <button
+        class="source-option"
+        :class="{ active: active === 'assistant' }"
+        :aria-current="active === 'assistant' ? 'page' : undefined"
+        @click="selectAssistant"
+      >
+        工作助手
+      </button>
+      <button
+        class="source-option"
+        :class="{ active: active === 'web' }"
+        :aria-current="active === 'web' ? 'page' : undefined"
+        @click="selectWeb"
+      >
+        查全网
+      </button>
+    </view>
+  </view>
+</template>
+
+<script setup lang="ts">
+const props = withDefaults(defineProps<{
+  active: 'assistant' | 'web';
+  context: string;
+  loading?: boolean;
+}>(), {
+  loading: false
+});
+
+const emit = defineEmits<{
+  selectAssistant: [];
+  selectWeb: [];
+  newConversation: [];
+}>();
+
+const selectAssistant = () => {
+  if (props.active !== 'assistant') emit('selectAssistant');
+};
+
+const selectWeb = () => {
+  if (props.active !== 'web') emit('selectWeb');
+};
+</script>
+
+<style scoped>
+.ask-source-head {
+  flex-shrink: 0;
+  padding: 8px 12px 6px;
+  border-bottom: 1px solid #ebedf0;
+  background: #ffffff;
+}
+
+.head-row {
+  display: flex;
+  min-height: 44px;
+  align-items: center;
+  justify-content: space-between;
+  gap: 8px;
+  margin-bottom: 6px;
+}
+
+.head-title {
+  flex-shrink: 0;
+  color: #18202b;
+  font-size: 16px;
+  font-weight: 800;
+}
+
+.head-actions {
+  display: flex;
+  min-width: 0;
+  align-items: center;
+  justify-content: flex-end;
+  gap: 6px;
+}
+
+.head-context {
+  min-width: 0;
+  overflow: hidden;
+  color: #7b8492;
+  font-size: 12px;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.new-chat-button {
+  flex-shrink: 0;
+  display: flex;
+  min-height: 44px;
+  align-items: center;
+  justify-content: center;
+  margin: 0;
+  padding: 0 14px;
+  border: 1px solid var(--employee-primary, #e60012);
+  border-radius: 999px;
+  background: var(--employee-primary, #e60012);
+  color: #ffffff;
+  font-size: 12px;
+  font-weight: 600;
+  line-height: 1;
+}
+
+.new-chat-button[disabled] {
+  opacity: 0.6;
+}
+
+.new-chat-button::after,
+.source-option::after {
+  border: none;
+}
+
+.source-switch {
+  display: flex;
+  gap: 0;
+  margin: 0;
+  padding: 3px;
+  border-radius: 999px;
+  background: #f2f3f5;
+}
+
+.source-option {
+  display: flex;
+  flex: 1;
+  box-sizing: border-box;
+  height: 44px;
+  min-height: 44px;
+  align-items: center;
+  justify-content: center;
+  margin: 0;
+  padding: 0;
+  border: none;
+  border-radius: 999px;
+  background: transparent;
+  color: #5a6270;
+  font-size: 13px;
+  font-weight: 500;
+  line-height: 1.2;
+}
+
+.source-option.active {
+  background: #ffffff;
+  color: #c8001a;
+  font-weight: 700;
+  box-shadow: 0 1px 4px rgba(20, 24, 31, 0.08);
+}
+</style>
diff --git a/mobile-uni/src/components/chat/ChatComposer.vue b/mobile-uni/src/components/chat/ChatComposer.vue
index 49964ac0..6af69dbf 100644
--- a/mobile-uni/src/components/chat/ChatComposer.vue
+++ b/mobile-uni/src/components/chat/ChatComposer.vue
@@ -271,14 +271,18 @@ defineExpose({ teardown, setDraft });
 
 .chip {
   flex-shrink: 0;
+  display: flex;
+  min-height: 30px;
+  align-items: center;
+  justify-content: center;
   margin: 0;
-  padding: 5px 12px;
+  padding: 0 13px;
   border: 1px solid #f0c0c5;
   border-radius: 999px;
   background: #ffffff;
   color: #c8001a;
   font-size: 13px;
-  line-height: 1.4;
+  line-height: 1;
 }
 
 .media-chip {
@@ -359,7 +363,6 @@ defineExpose({ teardown, setDraft });
   color: #232a33;
   font-size: 16px;
   font-weight: 600;
-  line-height: 1.2;
   user-select: none;
   -webkit-user-select: none;
 }
@@ -397,7 +400,6 @@ defineExpose({ teardown, setDraft });
   color: #ffffff;
   font-size: 15px;
   font-weight: 600;
-  line-height: 1.2;
 }
 
 .composer-panel {
diff --git a/mobile-uni/src/pages/user/sop/index.vue b/mobile-uni/src/pages/user/sop/index.vue
index b5a04592..464491e7 100644
--- a/mobile-uni/src/pages/user/sop/index.vue
+++ b/mobile-uni/src/pages/user/sop/index.vue
@@ -1,18 +1,12 @@
 <template>
   <view class="page sop-chat-page">
-    <view class="chat-head">
-      <view class="chat-head-row">
-        <text class="chat-title">问 · 数字师傅</text>
-        <view class="chat-head-actions">
-          <text class="chat-context">{{ positionLabel }} · 住宅项目</text>
-          <button class="new-chat-button" :disabled="loading" @click="startNewConversation">新对话</button>
-        </view>
-      </view>
-      <view class="source-switch chat-source-switch" aria-label="问答来源">
-        <button class="source-option active" aria-current="page">工作助手</button>
-        <button class="source-option" @click="openWebAi">查全网</button>
-      </view>
-    </view>
+    <AskSourceHeader
+      active="assistant"
+      :context="`${positionLabel} · 住宅项目`"
+      :loading="loading || voiceTranscribing"
+      @select-web="openWebAi"
+      @new-conversation="startNewConversation"
+    />
 
     <scroll-view scroll-y class="chat-thread" :scroll-top="threadScrollTop" :scroll-with-animation="true">
       <view class="thread-inner">
@@ -300,6 +294,7 @@ import type {
   SummaryCardResponse
 } from '@/types/api';
 import ChatComposer from '@/components/chat/ChatComposer.vue';
+import AskSourceHeader from '@/components/chat/AskSourceHeader.vue';
 import MemoryCandidateCard from '@/components/chat/MemoryCandidateCard.vue';
 import {
   chooseKnowledgeMedia,
@@ -1023,26 +1018,6 @@ onUnload(() => {
   content: '';
 }
 
-.source-switch {
-  display: grid;
-  grid-template-columns: 1fr 1fr;
-  gap: 4px;
-  margin-top: 16px;
-  padding: 4px;
-}
-
-.source-option {
-  min-height: 44px;
-  background: transparent;
-  color: var(--employee-muted);
-  font-weight: 800;
-}
-
-.source-option.active {
-  background: var(--employee-primary-soft);
-  color: var(--employee-primary);
-}
-
 .sop-eyebrow {
   display: inline-flex;
   margin-bottom: 12px;
@@ -2059,79 +2034,6 @@ onUnload(() => {
   overflow: hidden;
 }
 
-.chat-head {
-  flex-shrink: 0;
-  padding: 10px 14px 8px;
-  background: #ffffff;
-  border-bottom: 1px solid #ebedf0;
-}
-
-.chat-head-row {
-  display: flex;
-  align-items: baseline;
-  justify-content: space-between;
-  margin-bottom: 8px;
-}
-
-.chat-title {
-  color: #18202b;
-  font-size: 18px;
-  font-weight: 800;
-}
-
-.chat-context {
-  color: #8a93a0;
-  font-size: 12px;
-}
-
-.chat-head-actions {
-  display: flex;
-  align-items: center;
-  gap: 8px;
-}
-
-.new-chat-button {
-  margin: 0;
-  padding: 3px 9px;
-  border: 1px solid #e3e6ea;
-  border-radius: 999px;
-  background: #ffffff;
-  color: #5a6270;
-  font-size: 12px;
-  line-height: 1.5;
-}
-
-.chat-source-switch {
-  display: flex;
-  padding: 3px;
-  border-radius: 999px;
-  background: #f2f3f5;
-}
-
-.chat-source-switch .source-option {
-  display: flex;
-  flex: 1;
-  align-items: center;
-  justify-content: center;
-  box-sizing: border-box;
-  height: 32px;
-  margin: 0;
-  padding: 0;
-  border: none;
-  border-radius: 999px;
-  background: transparent;
-  color: #5a6270;
-  font-size: 14px;
-  line-height: 1.2;
-}
-
-.chat-source-switch .source-option.active {
-  background: #ffffff;
-  color: #c8001a;
-  font-weight: 700;
-  box-shadow: 0 1px 4px rgba(20, 24, 31, 0.08);
-}
-
 .chat-thread {
   flex: 1;
   min-height: 0;
@@ -2263,14 +2165,18 @@ onUnload(() => {
 }
 
 .bubble-action {
+  display: flex;
+  min-height: 28px;
+  align-items: center;
+  justify-content: center;
   margin: 0;
-  padding: 4px 12px;
+  padding: 0 12px;
   border: 1px solid #e3e6ea;
   border-radius: 999px;
   background: #f7f8fa;
   color: #38424e;
   font-size: 12px;
-  line-height: 1.5;
+  line-height: 1;
 }
 
 .bubble-action.active {
@@ -2429,14 +2335,18 @@ onUnload(() => {
 }
 
 .system-text {
+  display: flex;
   max-width: 86%;
-  padding: 4px 12px;
+  min-height: 26px;
+  align-items: center;
+  justify-content: center;
+  padding: 0 12px;
   border-radius: 999px;
   background: rgba(20, 24, 31, 0.06);
   color: #6b7480;
   font-size: 12px;
   text-align: center;
-  line-height: 1.5;
+  line-height: 1.3;
 }
 
 .pending-bubble .bubble-text {
@@ -2504,32 +2414,18 @@ onUnload(() => {
 
 .transcript-toggle {
   flex-shrink: 0;
+  display: flex;
+  min-height: 28px;
+  align-items: center;
+  justify-content: center;
   margin: 0;
-  padding: 4px 12px;
+  padding: 0 12px;
   border: none;
   border-radius: 8px;
   background: rgba(20, 24, 31, 0.06);
   color: #6b7480;
   font-size: 12px;
-  line-height: 1.5;
-}
-
-/* compact header */
-.chat-head {
-  padding: 8px 12px 6px;
-}
-
-.chat-head-row {
-  margin-bottom: 6px;
-}
-
-.chat-title {
-  font-size: 16px;
-}
-
-.chat-source-switch .source-option {
-  height: 30px;
-  font-size: 13px;
+  line-height: 1;
 }
 
 .transcript-collapse {
@@ -2546,12 +2442,15 @@ onUnload(() => {
 
 .scope-note {
   flex-shrink: 0;
-  padding: 6px 14px;
+  display: flex;
+  min-height: 30px;
+  align-items: center;
+  padding: 0 14px;
   border-top: 1px solid #eceef1;
   background: #ffffff;
   color: #8a93a0;
   font-size: 12px;
-  line-height: 1.4;
+  line-height: 1.3;
 }
 
 .master-col :deep(.memory-card) {
diff --git a/mobile-uni/src/pages/user/web-ai/index.vue b/mobile-uni/src/pages/user/web-ai/index.vue
index ff7b5469..d563b812 100644
--- a/mobile-uni/src/pages/user/web-ai/index.vue
+++ b/mobile-uni/src/pages/user/web-ai/index.vue
@@ -1,18 +1,12 @@
 <template>
   <view class="page webai-chat">
-    <view class="chat-head">
-      <view class="chat-head-row">
-        <view class="chat-head-left">
-          <button class="chat-back" aria-label="返回工作助手" @click="goBack"><uni-icons type="back" size="20" color="#25282d" /></button>
-          <text class="chat-title">查全网</text>
-        </view>
-        <text class="chat-context">互联网信息 · 独立来源</text>
-      </view>
-      <view class="source-switch chat-source-switch" aria-label="问答来源">
-        <button class="source-option" @click="goBack">工作助手</button>
-        <button class="source-option active" aria-current="page">查全网</button>
-      </view>
-    </view>
+    <AskSourceHeader
+      active="web"
+      context="互联网信息 · 独立来源"
+      :loading="loading || voiceTranscribing"
+      @select-assistant="openWorkAssistant"
+      @new-conversation="startNewConversation"
+    />
 
     <scroll-view scroll-y class="chat-thread" :scroll-top="threadScrollTop" :scroll-with-animation="true">
       <view class="thread-inner">
@@ -122,6 +116,7 @@
 import { nextTick, ref } from 'vue';
 import { onShow, onUnload } from '@dcloudio/uni-app';
 import type { KnowledgeMediaSelectedFile, SpeechPlaybackStatus, WebAiCapabilities, WebAiResponse } from '@/types/api';
+import AskSourceHeader from '@/components/chat/AskSourceHeader.vue';
 import ChatComposer from '@/components/chat/ChatComposer.vue';
 import { isLoggedIn, rememberLoginRedirect } from '@/services/auth';
 import { chooseKnowledgeMedia } from '@/services/knowledge';
@@ -203,7 +198,15 @@ const replaceMsg = (id: number, next: ChatMsg | null) => {
 
 const pushSystem = (text: string) => pushMsg<SystemMsg>({ role: 'system', text });
 
-const goBack = () => uni.switchTab({ url: '/pages/user/sop/index' });
+const openWorkAssistant = () => uni.switchTab({ url: '/pages/user/sop/index' });
+
+const startNewConversation = () => {
+  speechPlayback.stop();
+  messages.value = [];
+  msgSeq = 0;
+  threadScrollTop.value = 0;
+  pushSystem('已开始新对话');
+};
 
 const goLogin = () => {
   rememberLoginRedirect(path);
@@ -415,78 +418,6 @@ onUnload(() => {
   padding-bottom: calc(10px + env(safe-area-inset-bottom));
 }
 
-.chat-head {
-  flex-shrink: 0;
-  padding: 8px 12px 6px;
-  background: #ffffff;
-  border-bottom: 1px solid #ebedf0;
-}
-
-.chat-head-row {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  margin-bottom: 6px;
-}
-
-.chat-head-left {
-  display: flex;
-  align-items: center;
-  gap: 8px;
-}
-
-.chat-back {
-  display: flex;
-  width: 32px;
-  height: 32px;
-  align-items: center;
-  justify-content: center;
-  margin: 0;
-  padding: 0;
-  border: 1px solid #e3e6ea;
-  border-radius: 10px;
-  background: #ffffff;
-  color: #232a33;
-  line-height: 1;
-}
-
-.chat-title {
-  color: #18202b;
-  font-size: 16px;
-  font-weight: 800;
-}
-
-.chat-context {
-  color: #8a93a0;
-  font-size: 12px;
-}
-
-.chat-source-switch {
-  display: flex;
-  padding: 3px;
-  border-radius: 999px;
-  background: #f2f3f5;
-}
-
-.chat-source-switch .source-option {
-  flex: 1;
-  margin: 0;
-  padding: 5px 0;
-  border: none;
-  border-radius: 999px;
-  background: transparent;
-  color: #5a6270;
-  font-size: 13px;
-  line-height: 1.3;
-}
-
-.chat-source-switch .source-option.active {
-  background: #ffffff;
-  color: #c8001a;
-  font-weight: 700;
-  box-shadow: 0 1px 4px rgba(20, 24, 31, 0.08);
-}
-
 .chat-thread {
   flex: 1;
   min-height: 0;