Rewrite the constraint specs and docs for the service-led information architecture.

Assertions now follow the eighteen prerenderable paths, the gist dialog, and the six-case evidence set.

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

e2e/fragments.e2e.ts

@@ -40,12 +40,12 @@ test.describe('fragment scrolling', () => {
       await page.setViewportSize({ width, height: VIEWPORT_HEIGHT });
 
       for (const locale of APP_LOCALES) {
-        const path = `${pagePath('projects', locale)}#myspa`;
+        const path = `${pagePath('projects', locale)}#bannier`;
         const label = `${width}px ${locale}`;
         await page.goto(path, { waitUntil: 'networkidle' });
 
         const header = page.locator('.site-header');
-        const heading = page.locator('#myspa h2');
+        const heading = page.locator('#bannier h2');
         await expect(heading).toBeVisible();
 
         await waitForScrollSettle(page);