feat: show contextual navigation loading

tests/project-case-studies.test.mjs

@@ -29,7 +29,7 @@ test('localized project routes use runtime content and metadata', async () => {
 test('project cards separate case study navigation from live links', async () => {
   const source = await readFile('src/components/ProjectsSection.tsx', 'utf8');
 
-  assert.match(source, /import Link from ['"]next\/link['"]/);
+  assert.match(source, /PortfolioLink as Link/);
   assert.match(source, /scroll=\{false\}/);
   assert.match(source, /target="_blank"/);
   assert.match(source, /rel="noopener noreferrer"/);