Polish homepage avatar and project card interactions

- Remove avatar border, increase size to 128px, add circular clip wrapper
  with overflow:hidden + scale(1.08) to crop spiky fur edges cleanly
- Tighten hero avatar margin-bottom from 20px to 12px
- Add translateY(-2px) hover transform to project cards for subtle lift effect

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/pages/projects.astro

@@ -169,12 +169,13 @@ function getPrimaryLink(project: Project): string | undefined {
         border-radius: 6px;
         padding: var(--space-md);
         background: var(--color-bg);
-        transition: border-color 0.2s ease, box-shadow 0.2s ease;
+        transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
     }
 
     .project-item:hover {
-        border-color: var(--color-accent);
+        border-color: rgba(255, 255, 255, 0.2);
         box-shadow: 0 0 0 1px var(--color-accent);
+        transform: translateY(-2px);
     }
 
     .project-item:hover .project-name {