Make CV pages responsive for mobile viewports

Add flex-wrap, stacked layouts on small screens, and mobile-friendly
a4page/skills-grid styles across all CV variants.

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

vue/src/views/CV/CV.vue

@@ -57,6 +57,7 @@ function print() {
     top: 0;
     z-index: 40;
     display: flex;
+    flex-wrap: wrap;
     justify-content: center;
     gap: 0.5rem;
     padding: 0.5rem;