refactor: update skeleton header to pixel-perfect match actual layout

Updates skeleton header to exactly match the actual CV header layout with
photo absolutely positioned on the right side.

**Layout Changes:**
- Photo: 150x200px positioned absolutely (top: 15px, right: 15px)
- Name: 40px height (h1 size)
- Subtitle: 24px height (larger)
- Intro text: 90px height (3-4 lines)
- Header has padding-right: 185px to accommodate photo
- Removed flex layout, using absolute positioning like actual

**Visual Improvements:**
- Photo border: 3px solid #e8e8e8 (matches actual white border)
- No border-radius on photo (matches actual)
- Larger text blocks for better visual match
- Proper spacing between elements

**Tests:**
- test-skeleton-verify.mjs: ✅ All 4 language switches pass
- Skeleton displays correctly on every transition

templates/partials/sections/header.html

@@ -22,12 +22,10 @@
     <!-- Skeleton Content -->
     <div class="skeleton-content">
         <div class="skeleton-header">
-            <div class="skeleton-header-text">
-                <div class="skeleton skeleton-name"></div>
-                <div class="skeleton skeleton-experience-years"></div>
-                <div class="skeleton skeleton-intro"></div>
-            </div>
+            <div class="skeleton skeleton-name"></div>
+            <div class="skeleton skeleton-experience-years"></div>
             <div class="skeleton skeleton-photo"></div>
+            <div class="skeleton skeleton-intro"></div>
         </div>
     </div>
 </div>