fix(web): keep composer add action attachment-only

packages/client/ui-conversation/src/client/skeleton/EmptyHero.tsx

@@ -73,7 +73,6 @@ export interface EmptyHeroProps {
   status?: string
   onDraftChange: (text: string) => void
   onSend: (mode: 'queue' | 'steer') => void
-  onAdd?: () => void
   /** Overlay content after the stack (EmptyState's modals). */
   children?: ReactNode
 }
@@ -92,7 +91,6 @@ export function EmptyHero({
   status,
   onDraftChange,
   onSend,
-  onAdd,
   children,
 }: EmptyHeroProps) {
   // Stable filter id so multiple hero mounts do not collide in the DOM.
@@ -140,8 +138,6 @@ export function EmptyHero({
             placeholder={placeholder ?? 'Describe what you want to build'}
             onDraftChange={onDraftChange}
             onSend={onSend}
-            {...(onAdd === undefined ? {} : { onAdd })}
-            addLabel="Create workspace"
             /* v8 ignore next -- structural noop: hero never passes running=true, so stop is unreachable. */
             onStop={() => {}}
           />

packages/client/ui-conversation/src/client/skeleton/EmptyState.tsx

@@ -72,7 +72,6 @@ export function EmptyState({
       error={error}
       onDraftChange={updateSessionPrompt}
       onSend={() => { sendSession() }}
-      onAdd={() => { setPickerOpen(true) }}
     />
   )
 }

packages/client/ui-conversation/tests/skeleton.spec.tsx

@@ -72,6 +72,8 @@ describe('EmptyState', () => {
       prompt: 'draft', phase: 'ready',
     })
     expect(b.view.getByRole('button', { name: 'Choose workspace' }).textContent).toContain('workspace')
+    fireEvent.click(b.view.getByRole('button', { name: 'Add attachment' }))
+    expect((b.pickerOwner() as { open: boolean }).open).toBe(false)
     fireEvent.change(b.view.getByPlaceholderText('Describe what you want to build'), { target: { value: 'build it' } })
     expect(b.updateSessionPrompt).toHaveBeenCalledWith('build it')
     fireEvent.click(b.view.getByRole('button', { name: 'Send message' }))