feat: add terminal broadcast, context menu, and shell close

Complete multi-pane broadcast, standard terminal right-click actions, batch host selection with progress, and native ssh_close_shell so closing a pane tears down the remote shell.

Co-authored-by: Cursor <cursoragent@cursor.com>

test/components/BatchCommandDialog.test.tsx

@@ -33,7 +33,7 @@ describe('BatchCommandDialog', () => {
     render(<BatchCommandDialog isOpen sessions={sessions} onClose={vi.fn()} />)
 
     await user.type(screen.getByLabelText('远程命令'), 'date')
-    await user.click(screen.getByRole('button', { name: '执行命令' }))
+    await user.click(screen.getByRole('button', { name: '执行到 2 台' }))
 
     await waitFor(() => expect(mockDesktopApi.sshExec).toHaveBeenCalledTimes(2))
     expect(mockDesktopApi.sshExec).toHaveBeenCalledWith('connection-10.0.0.1', 'date')
@@ -43,4 +43,41 @@ describe('BatchCommandDialog', () => {
     expect(screen.getByText('connection-10.0.0.1: date')).toBeVisible()
     expect(screen.getByText('connection-10.0.0.2: date')).toBeVisible()
   })
+
+  it('starts with the sidebar selection and lets the user adjust targets in the dialog', async () => {
+    const user = userEvent.setup()
+    render(
+      <BatchCommandDialog
+        isOpen
+        sessions={sessions}
+        initialSelectedIds={['host-a']}
+        onClose={vi.fn()}
+      />
+    )
+
+    expect(screen.getByRole('checkbox', { name: /Host A/ })).toHaveAttribute('aria-checked', 'true')
+    expect(screen.getByRole('checkbox', { name: /Host B/ })).toHaveAttribute('aria-checked', 'false')
+    await user.click(screen.getByRole('checkbox', { name: /Host B/ }))
+    expect(screen.getByRole('button', { name: '执行到 2 台' })).toBeVisible()
+
+    await user.type(screen.getByLabelText('筛选主机'), '10.0.0.1')
+    expect(screen.getByRole('checkbox', { name: /Host A/ })).toBeVisible()
+    expect(screen.queryByRole('checkbox', { name: /Host B/ })).not.toBeInTheDocument()
+  })
+
+  it('clears the command when reopened so sensitive input is not retained', async () => {
+    const user = userEvent.setup()
+    const { rerender } = render(
+      <BatchCommandDialog isOpen sessions={sessions} onClose={vi.fn()} />
+    )
+
+    const command = screen.getByLabelText('远程命令')
+    await user.type(command, 'cat /etc/shadow')
+    expect(command).toHaveValue('cat /etc/shadow')
+
+    rerender(<BatchCommandDialog isOpen={false} sessions={sessions} onClose={vi.fn()} />)
+    rerender(<BatchCommandDialog isOpen sessions={sessions} onClose={vi.fn()} />)
+
+    expect(screen.getByLabelText('远程命令')).toHaveValue('')
+  })
 })