fix: update tool count to 51, refresh hero copy and login page

- Update stale tool counts (48/49/50) to 51 across all apps, docs, and tests
- Add Meme Generator to landing page bento grid (was missing)
- Add 12 SEO-friendly rotating phrases to hero typing cursor
- Change landing hero subtitle to "Every image tool you need."
- Replace outdated login page copy with branded hero + rotating phrases

tests/e2e/gui-navigation.spec.ts

@@ -16,7 +16,7 @@ test.describe("Login Page", () => {
     await expect(page.getByRole("button", { name: /login/i })).toBeVisible();
 
     // Right side: marketing text (hidden on mobile, visible on lg+)
-    await expect(page.getByText("Your one-stop-shop")).toBeVisible();
+    await expect(page.getByText("Your images. Stay yours.")).toBeVisible();
   });
 
   test("username and password inputs start empty", async ({ page }) => {