diff --git a/docs/wiki/Keyboard-Shortcuts.md b/docs/wiki/Keyboard-Shortcuts.md
index d4d54c46..8426daec 100644
--- a/docs/wiki/Keyboard-Shortcuts.md
+++ b/docs/wiki/Keyboard-Shortcuts.md
@@ -8,7 +8,7 @@ Press `Ctrl+?` in the app for the same list in a floating overlay.
 
 | Shortcut                        | Action                                                          |
 | ------------------------------- | --------------------------------------------------------------- |
-| `Ctrl+K` (also `Cmd+K`, `Alt+K`)| Find an open session or start a new one.                         |
+| `Ctrl+K` (also `Cmd+K`, `Alt+K`)| Find an open session or start a new one. On the **New session** row, `Left` / `Right` change the agent it starts. |
 | `Ctrl+Tab`                      | Next session.                                                    |
 | `Alt+[` / `Alt+]`               | Previous / next tab.                                             |
 | `Alt+1` to `Alt+9`              | Switch to tab N. Physical keys, so macOS Option layouts work.    |
diff --git a/src/web/public/i18n.js b/src/web/public/i18n.js
index 2d0bbda9..7ae0575e 100644
--- a/src/web/public/i18n.js
+++ b/src/web/public/i18n.js
@@ -94,6 +94,8 @@
     'Move to Ungrouped': '移到未分组',
     'Move to new group': '移到新分组',
     'New session': '新建会话',
+    // The Cmd+K palette's new-session agent switch (panels-ui.js, its title tooltip).
+    'Agent for the new session (Left/Right to change)': '新会话使用的智能体（按左/右方向键切换）',
     'A session is already starting.': '已有会话正在启动。',
     'Follow parent again': '重新跟随父会话',
     'Parent closed; placed on its own': '父会话已关闭；单独放置',
diff --git a/src/web/public/panels-ui.js b/src/web/public/panels-ui.js
index 9561d4a3..40a758f5 100644
--- a/src/web/public/panels-ui.js
+++ b/src/web/public/panels-ui.js
@@ -694,19 +694,21 @@ Object.assign(CodemanApp.prototype, {
 
   /**
    * The new-session row's agent switch: arrows either side of the agent's logo
-   * and name. Spans, not buttons: the row itself is a <button>. Nothing is drawn
-   * when there is nothing to choose between.
+   * and name. Spans, not buttons: the row itself is a <button>. The switch is
+   * aria-hidden (no nested buttons; the row's subtitle already names the agent),
+   * and its arrows work by click through data-palette-agent-cycle. Nothing is
+   * drawn when there is nothing to choose between.
    */
   _renderCommandPaletteAgentPicker(mode) {
     const choices = this._commandPaletteAgentChoices();
     if (choices.length < 2) return '';
     const agent = choices.find((c) => c.id === mode) || choices[0];
     return `
-            <span class="command-palette-agent" title="Agent for the new session (Left/Right to change)">
-              <span class="command-palette-agent-arrow" role="button" data-palette-agent-cycle="prev" aria-label="Previous agent">&lsaquo;</span>
+            <span class="command-palette-agent" aria-hidden="true" title="Agent for the new session (Left/Right to change)">
+              <span class="command-palette-agent-arrow" data-palette-agent-cycle="prev">&lsaquo;</span>
               <span class="run-mode-dot ${escapeHtml(agent.id)}" aria-hidden="true"></span>
               <span class="command-palette-agent-label">${escapeHtml(agent.label)}</span>
-              <span class="command-palette-agent-arrow" role="button" data-palette-agent-cycle="next" aria-label="Next agent">&rsaquo;</span>
+              <span class="command-palette-agent-arrow" data-palette-agent-cycle="next">&rsaquo;</span>
             </span>`;
   },
 
diff --git a/test/command-palette-ui.test.ts b/test/command-palette-ui.test.ts
index c5e38aa2..3b78c78a 100644
--- a/test/command-palette-ui.test.ts
+++ b/test/command-palette-ui.test.ts
@@ -387,6 +387,20 @@ describe('Command-K new-session agent picker', () => {
     expect(elements.commandPaletteList.innerHTML).toContain('run-mode-dot opencode');
   });
 
+  it('keeps the switch out of the row button accessible name and gives its tooltip a zh-CN entry', () => {
+    const { app, elements } = loadAgentPalette();
+    app.openCommandPalette();
+    const html = elements.commandPaletteList.innerHTML;
+    const title = 'Agent for the new session (Left/Right to change)';
+
+    // No nested buttons inside the row's <button>: the subtitle names the agent.
+    expect(html).toContain(`class="command-palette-agent" aria-hidden="true" title="${title}"`);
+    expect(html).not.toContain('role="button"');
+    expect(html).not.toContain('aria-label=');
+    const i18n = readFileSync(resolve(import.meta.dirname, '../src/web/public/i18n.js'), 'utf8');
+    expect(i18n.split(`'${title}':`).length - 1).toBe(1);
+  });
+
   it('falls back to the first offered agent when the Run button mode is not offered', () => {
     const { app } = loadAgentPalette();
     app._runMode = 'codex'; // not installed