test(web): answer the fixture approval takeover; refresh aria goldens

The assembled fixture app now takes over the composer while fx-alpha's
resident approval is pending — the feature under test, not chrome noise —
so the session-title snapshot answers it (允许一次) before asserting the
model seat, mirroring what a user sees. The eleven keyless ui.expected.md
goldens re-record (DSH_SNAPSHOT=refresh, no key) for the Access placeholder
→ projection chip swap (Danger Full Access under the roster default) plus
the master-side chrome drift the goldens had accumulated (copy/branch/edit
buttons, tab rows) since their last refresh.

apps/web/tests/session-title.snapshot.ts

@@ -119,6 +119,10 @@ it('projects titles and routes the next turn through the selected model in the b
   await waitFor(() => { expect(document.title).toBe(`${revisedLabel} — DeepSeek Harness`) })
   const revised = titleSurfaces(revisedLabel)
 
+  // fx-alpha carries the fixture's resident answerable approval, so the
+  // approval panel has taken over the composer (the real takeover behavior);
+  // answer it to restore the composer chrome before asserting the model seat.
+  fireEvent.click(await screen.findByRole('button', { name: '允许一次' }))
   const modelTrigger = await screen.findByRole('button', {
     name: '选择模型，当前 DeepSeek-V4-Flash，推理等级 High',
   })