feat: add dynamic years calculation and complete CV content migration

- Add dynamic years of experience calculation from April 1, 2005
- Update professional title badges: ANALYST | TECHNICAL CONSULTANT
- Add all missing skill categories from React CV (Programming Languages, JavaScript Frameworks, PHP Frameworks, Java Frameworks, Application Servers, CMS, Design Tools, Team Management)
- Add complete References section with LinkedIn, Behance, portfolios, and recommendation letters
- Refine years-of-experience subtitle styling to match original design
- Achieve 100% content parity with old React CV (English: 7→14 skill categories)

static/css/logo-toggle.css

@@ -1,16 +1,19 @@
-/* Logo Toggle Component */
+/* Toggle Components - Unified Design */
+.language-toggle,
+.cv-length-toggle,
 .logo-toggle {
-    display: flex;
+    display: inline-flex;
     align-items: center;
     justify-content: center;
+    gap: 0.5rem;
+    white-space: nowrap;
 }
 
 .toggle-switch {
-    display: flex;
-    align-items: center;
-    gap: 0.5rem;
+    display: inline-block;
     cursor: pointer;
     user-select: none;
+    position: relative;
 }
 
 .toggle-switch input[type="checkbox"] {
@@ -23,23 +26,24 @@
 .toggle-slider {
     position: relative;
     display: inline-block;
-    width: 44px;
-    height: 24px;
-    background-color: #ccc;
-    border-radius: 24px;
+    width: 50px;
+    height: 26px;
+    background-color: #555;
+    border-radius: 26px;
     transition: background-color 0.3s ease;
 }
 
 .toggle-slider::after {
     content: '';
     position: absolute;
-    width: 18px;
-    height: 18px;
+    width: 20px;
+    height: 20px;
     border-radius: 50%;
     background-color: white;
     top: 3px;
     left: 3px;
     transition: transform 0.3s ease;
+    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
 }
 
 .toggle-switch input[type="checkbox"]:checked + .toggle-slider {
@@ -47,17 +51,33 @@
 }
 
 .toggle-switch input[type="checkbox"]:checked + .toggle-slider::after {
-    transform: translateX(20px);
+    transform: translateX(24px);
 }
 
 .toggle-switch input[type="checkbox"]:focus + .toggle-slider {
     box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.2);
 }
 
-.toggle-label {
-    font-size: 0.9rem;
+.toggle-label-left,
+.toggle-label-right {
+    font-size: 0.8rem;
     font-weight: 500;
-    color: #ccc;
+    color: #999;
+    transition: color 0.3s ease;
+    white-space: nowrap;
+}
+
+/* Highlight active label based on parent container state */
+.language-toggle:has(#langToggle:not(:checked)) .toggle-label-left,
+.cv-length-toggle:has(#lengthToggle:not(:checked)) .toggle-label-left,
+.logo-toggle:has(#logoToggle:not(:checked)) .toggle-label-left {
+    color: #fff;
+}
+
+.language-toggle:has(#langToggle:checked) .toggle-label-right,
+.cv-length-toggle:has(#lengthToggle:checked) .toggle-label-right,
+.logo-toggle:has(#logoToggle:checked) .toggle-label-right {
+    color: #fff;
 }
 
 /* Experience Item with Logo Support */