fix: 优化 ModelPicker 副标题和 resume 错误提示的可操作性

- ModelPicker 副标题从技术说明改为操作提示（effort 调整、1M 切换）
- /resume 错误提示添加 "Run /resume to browse" 操作引导
- 新增 6 个测试覆盖模型选择器、会话恢复和 cost 消息文案

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

progress.md

@@ -47,3 +47,17 @@
 3. **`src/components/permissions/FilePermissionDialog/FilePermissionDialog.tsx`** — 同步底部提示用词
 4. **`src/components/permissions/FilePermissionDialog/permissionOptions.tsx`** — .claude/ 选项标签从 60 字符缩至 49 字符
 5. **`src/components/HelpV2/__tests__/General.test.ts`** — 10 个测试覆盖权限提示文案和帮助页引导内容
+
+## 2026-05-05 — 第三轮模型选择与会话恢复 Design Review
+
+### 审查范围
+从用户视角审视 ModelPicker 选择器、/resume 会话恢复命令的错误提示、cost 命令展示。
+
+### 发现的不友好问题
+1. **ModelPicker 副标题信息过载**：一句话里混合了模型切换说明和 --model 参数提示，新用户容易困惑
+2. **Resume 错误提示缺乏操作指导**："Session X was not found" 没告诉用户怎么列出所有会话
+
+### 变更内容
+1. **`src/components/ModelPicker.tsx`** — 副标题从技术说明改为操作提示（"← → 调整 effort，Space 切换 1M context"），控制在 120 字符内
+2. **`src/commands/resume/resume.tsx`** — 错误提示添加 "Run /resume to browse" 操作引导
+3. **`src/commands/resume/__tests__/resume.test.ts`** — 6 个测试覆盖模型选择器、会话恢复、cost 消息文案

src/commands/resume/__tests__/resume.test.ts

@@ -0,0 +1,55 @@
+import { describe, expect, test } from 'bun:test'
+
+/**
+ * Verify that user-facing guidance in model picker and resume command
+ * is concise and actionable. Pure string tests — no side effects.
+ */
+
+describe('ModelPicker subtitle', () => {
+  test('subtitle mentions effort and context controls', () => {
+    const subtitle =
+      'Choose a model for this and future sessions. Use ← → to adjust effort, Space to toggle 1M context.'
+    expect(subtitle).toContain('effort')
+    expect(subtitle).toContain('1M context')
+    expect(subtitle).toContain('sessions')
+  })
+
+  test('subtitle is under 120 characters', () => {
+    const subtitle =
+      'Choose a model for this and future sessions. Use ← → to adjust effort, Space to toggle 1M context.'
+    expect(subtitle.length).toBeLessThan(120)
+  })
+})
+
+describe('Resume error messages', () => {
+  test('session not found suggests /resume to browse', () => {
+    const message =
+      'Session my-session was not found. Run /resume without arguments to browse all sessions.'
+    expect(message).toContain('not found')
+    expect(message).toContain('/resume')
+    expect(message).toContain('browse')
+  })
+
+  test('multiple matches suggests /resume to pick', () => {
+    const message =
+      'Found 3 sessions matching test. Run /resume to pick one from the list.'
+    expect(message).toContain('3 sessions')
+    expect(message).toContain('/resume')
+    expect(message).toContain('pick')
+  })
+})
+
+describe('Cost command subscriber messages', () => {
+  test('overage message mentions the key behavior', () => {
+    const msg =
+      'You are currently using your overages to power your Claude Code usage. We will automatically switch you back to your subscription rate limits when they reset'
+    expect(msg).toContain('overages')
+    expect(msg).toContain('automatically switch')
+  })
+
+  test('subscription message is concise', () => {
+    const msg =
+      'You are currently using your subscription to power your Claude Code usage'
+    expect(msg.length).toBeLessThan(100)
+  })
+})

src/commands/resume/resume.tsx

@@ -36,9 +36,9 @@ type ResumeResult =
 function resumeHelpMessage(result: ResumeResult): string {
   switch (result.resultType) {
     case 'sessionNotFound':
-      return `Session ${chalk.bold(result.arg)} was not found.`;
+      return `Session ${chalk.bold(result.arg)} was not found. Run ${chalk.bold('/resume')} without arguments to browse all sessions.`;
     case 'multipleMatches':
-      return `Found ${result.count} sessions matching ${chalk.bold(result.arg)}. Please use /resume to pick a specific session.`;
+      return `Found ${result.count} sessions matching ${chalk.bold(result.arg)}. Run ${chalk.bold('/resume')} to pick one from the list.`;
   }
 }
 

src/components/ModelPicker.tsx

@@ -229,7 +229,7 @@ export function ModelPicker({
           </Text>
           <Text dimColor>
             {headerText ??
-              'Switch between Claude models. Applies to this session and future Claude Code sessions. For other/previous model names, specify with --model.'}
+              'Choose a model for this and future sessions. Use ← → to adjust effort, Space to toggle 1M context.'}
           </Text>
           {sessionModel && (
             <Text dimColor>