diff --git a/packages/client/ui-chat/src/chat-settings.ts b/packages/client/ui-chat/src/chat-settings.ts
index 7335a49db5..640f416043 100644
--- a/packages/client/ui-chat/src/chat-settings.ts
+++ b/packages/client/ui-chat/src/chat-settings.ts
@@ -15,7 +15,7 @@ export const TRANSCRIPT_VIEW_MODES = ['compact', 'standard', 'detailed', 'verbos
 export type TranscriptViewMode = typeof TRANSCRIPT_VIEW_MODES[number]
 
 /**
- * Saved value from the two-mode generation of this setting. Read as `standard`;
+ * Saved value from the two-mode generation of this setting. Read as `detailed`;
  * never offered as a choice and never written back.
  */
 export const LEGACY_TRANSCRIPT_VIEW_MODE = 'normal'
diff --git a/packages/client/ui-chat/src/client/conversation-nodes/README.i18n.yaml b/packages/client/ui-chat/src/client/conversation-nodes/README.i18n.yaml
index 3017e3eaed..9ef9c65e93 100644
--- a/packages/client/ui-chat/src/client/conversation-nodes/README.i18n.yaml
+++ b/packages/client/ui-chat/src/client/conversation-nodes/README.i18n.yaml
@@ -27,8 +27,8 @@
   en: 8db4991626210708
   zh: e18c8aa3cb434980
 /chat-conversation-node-rules/display-modes:
-  en: 42342a06ef189075
-  zh: 1a554b50125fcdda
+  en: b67a97af6578be4e
+  zh: 45511f59d45746fe
 /chat-conversation-node-rules/display-modes/group-title-rules:
   en: a6d29a5ea3fd2362
   zh: dbd07bf82cdd61b1
diff --git a/packages/client/ui-chat/src/client/conversation-nodes/README.md b/packages/client/ui-chat/src/client/conversation-nodes/README.md
index 12c63b5497..d75b5b20e7 100644
--- a/packages/client/ui-chat/src/client/conversation-nodes/README.md
+++ b/packages/client/ui-chat/src/client/conversation-nodes/README.md
@@ -108,7 +108,7 @@ Automatic collapse keeps the process open if hiding it would hide keyboard focus
 <a id="display-modes"></a>
 ## Display modes
 
-Settings → General → Work details offers `compact`, `standard` (default), `detailed`, and `verbose`; its description is “Choose how much detail to show for tool calls”. A saved `normal` reads as `standard`, and a saved `expanded` reads as `detailed`, without automatic write-back. Existing `detailed` remains `detailed`. Missing or invalid values, including the period before Host settings arrive, use `standard`; invalid values in other settings still fail validation.
+Settings → General → Work details offers `compact`, `standard` (default), `detailed`, and `verbose`; its description is “Choose how much detail to show for tool calls”. Saved `normal` and `expanded` values read as `detailed`, without automatic write-back. Existing `detailed` remains `detailed`. Missing or invalid values, including the period before Host settings arrive, use `standard`; invalid values in other settings still fail validation.
 
 | Behavior | Compact | Standard | Detailed | Verbose |
 |---|---|---|---|---|
diff --git a/packages/client/ui-chat/src/client/conversation-nodes/README.zh.md b/packages/client/ui-chat/src/client/conversation-nodes/README.zh.md
index 341c2826a1..9925f4b449 100644
--- a/packages/client/ui-chat/src/client/conversation-nodes/README.zh.md
+++ b/packages/client/ui-chat/src/client/conversation-nodes/README.zh.md
@@ -108,7 +108,7 @@ description: "Chat 过程分组与活动摘要的明细业务规则。"
 <a id="display-modes"></a>
 ## 展示模式
 
-设置 → 通用设置 → 工作步骤展示提供 `compact`、`standard`（默认）、`detailed` 和 `verbose`，说明为「选择希望看到多少工具调用细节」。旧值 `normal` 读取为 `standard`，`expanded` 读取为 `detailed`，不自动回写；已有 `detailed` 保持不变。未配置、无效值以及 Host 设置到达前均使用 `standard`；其他设置的无效值仍会校验失败。
+设置 → 通用设置 → 工作步骤展示提供 `compact`、`standard`（默认）、`detailed` 和 `verbose`，说明为「选择希望看到多少工具调用细节」。旧值 `normal` 和 `expanded` 均读取为 `detailed`，不自动回写；已有 `detailed` 保持不变。未配置、无效值以及 Host 设置到达前均使用 `standard`；其他设置的无效值仍会校验失败。
 
 | 行为 | 简洁 | 标准 | 详细 | 完全展开 |
 |---|---|---|---|---|
diff --git a/packages/client/ui-chat/src/client/transcript-view.ts b/packages/client/ui-chat/src/client/transcript-view.ts
index e7f6cc4fde..729b5443a0 100644
--- a/packages/client/ui-chat/src/client/transcript-view.ts
+++ b/packages/client/ui-chat/src/client/transcript-view.ts
@@ -39,8 +39,8 @@ export class TranscriptViewPolicy {
     const section = this.host.getSnapshot().value
     if (section === undefined) return
     const saved = section.transcriptView
-    const mode = saved === LEGACY_TRANSCRIPT_VIEW_MODE ? 'standard'
-      : saved === LEGACY_EXPANDED_TRANSCRIPT_VIEW_MODE ? 'detailed' : saved
+    const mode = saved === LEGACY_TRANSCRIPT_VIEW_MODE || saved === LEGACY_EXPANDED_TRANSCRIPT_VIEW_MODE
+      ? 'detailed' : saved
     if (this.mode.getSnapshot() !== mode) this.mode.set(mode)
   }
 }
diff --git a/packages/client/ui-chat/tests/transcript-view-policy.client.spec.ts b/packages/client/ui-chat/tests/transcript-view-policy.client.spec.ts
index 28a9212054..752f5f19ea 100644
--- a/packages/client/ui-chat/tests/transcript-view-policy.client.spec.ts
+++ b/packages/client/ui-chat/tests/transcript-view-policy.client.spec.ts
@@ -26,22 +26,27 @@ describe('TranscriptViewPolicy', () => {
     expect(host.set).toHaveBeenCalledWith('transcriptView', 'detailed')
   })
 
-  it('adopts Host state, reads normal as Standard, and ignores identical writes', () => {
+  it.each(['normal', 'expanded'] as const)('reads a later Host %s setting as Detailed without writing it back', (mode) => {
     const host = stubConfigForm<ChatSettings>()
     const policy = new TranscriptViewPolicy(host.scope)
 
-    host.publish({ status: 'ready', value: { linkOpening: 'sidebar', transcriptView: 'normal', performanceUsage: 'detailed' }, revision: 1, writable: true })
-    expect(policy.mode.getSnapshot()).toBe('standard')
-    policy.setMode('standard')
+    host.publish({ status: 'ready', value: { linkOpening: 'sidebar', transcriptView: mode, performanceUsage: 'detailed' }, revision: 1, writable: true })
+    expect(policy.mode.getSnapshot()).toBe('detailed')
     expect(host.set).not.toHaveBeenCalled()
+    policy.setMode('detailed')
+    expect(host.set).not.toHaveBeenCalled()
+
+    policy.setMode('standard')
+    expect(policy.mode.getSnapshot()).toBe('standard')
+    expect(host.set).toHaveBeenCalledExactlyOnceWith('transcriptView', 'standard')
 
     host.publish({ value: { linkOpening: 'sidebar', transcriptView: 'compact', performanceUsage: 'detailed' }, revision: 2 })
     expect(policy.mode.getSnapshot()).toBe('compact')
   })
 
-  it('adopts an accepted section standing at construction', () => {
+  it.each(['normal', 'expanded'] as const)('reads an initial Host %s setting as Detailed without writing it back', (mode) => {
     const host = stubConfigForm<ChatSettings>()
-    host.publish({ status: 'ready', value: { linkOpening: 'sidebar', transcriptView: 'expanded', performanceUsage: 'detailed' }, revision: 1, writable: true })
+    host.publish({ status: 'ready', value: { linkOpening: 'sidebar', transcriptView: mode, performanceUsage: 'detailed' }, revision: 1, writable: true })
     expect(new TranscriptViewPolicy(host.scope).mode.getSnapshot()).toBe('detailed')
     expect(host.set).not.toHaveBeenCalled()
   })