feat(marketing): new hero copy + single CTA

- Headline → "Scale your Large World" (coral on "Large World").
- Subtext → "Building safe and scalable systems of claws for any domain of work."
- Drop the "Get started for free" hero button; keep "Book a demo".
- Remove the three hero trust pills (free credits / no card / self-hostable).
- Point the p7 hero CTA assertion at "Book a demo"; refresh the @visual baseline.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

frontend/tests/e2e/p7-marketing.spec.ts

@@ -15,7 +15,7 @@ test("the marketing landing renders for logged-out visitors @marketing", async (
     page.getByRole("heading", { name: /AI coworkers/ }),
   ).toBeVisible();
   await expect(
-    page.getByRole("link", { name: "Get started for free" }).first(),
+    page.getByRole("link", { name: "Book a demo" }).first(),
   ).toBeVisible();
   // FAQ accordion: the first item is open by default; expand another.
   await expect(page.getByText(/A claw is an AI coworker/)).toBeVisible();