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)

internal/handlers/cv.go

@@ -51,12 +51,16 @@ func (h *CVHandler) Home(w http.ResponseWriter, r *http.Request) {
 	// Split skills between left and right sidebars
 	skillsLeft, skillsRight := splitSkills(cv.Skills.Technical)
 
+	// Calculate years of experience
+	yearsOfExperience := calculateYearsOfExperience()
+
 	// Prepare template data
 	data := map[string]interface{}{
-		"CV":          cv,
-		"Lang":        lang,
-		"SkillsLeft":  skillsLeft,
-		"SkillsRight": skillsRight,
+		"CV":                 cv,
+		"Lang":               lang,
+		"SkillsLeft":         skillsLeft,
+		"SkillsRight":        skillsRight,
+		"YearsOfExperience":  yearsOfExperience,
 	}
 
 	// Render template
@@ -97,12 +101,16 @@ func (h *CVHandler) CVContent(w http.ResponseWriter, r *http.Request) {
 	// Split skills between left and right sidebars
 	skillsLeft, skillsRight := splitSkills(cv.Skills.Technical)
 
+	// Calculate years of experience
+	yearsOfExperience := calculateYearsOfExperience()
+
 	// Prepare template data
 	data := map[string]interface{}{
-		"CV":          cv,
-		"Lang":        lang,
-		"SkillsLeft":  skillsLeft,
-		"SkillsRight": skillsRight,
+		"CV":                 cv,
+		"Lang":               lang,
+		"SkillsLeft":         skillsLeft,
+		"SkillsRight":        skillsRight,
+		"YearsOfExperience":  yearsOfExperience,
 	}
 
 	// Render template
@@ -178,3 +186,24 @@ func splitSkills(skills []models.SkillCategory) (left, right []models.SkillCateg
 
 	return left, right
 }
+
+// calculateYearsOfExperience calculates years of experience since April 1, 2005
+// This matches the original React implementation that calculated from 01/04/2005
+func calculateYearsOfExperience() int {
+	// First day at work: April 1, 2005
+	firstDay := time.Date(2005, time.April, 1, 9, 0, 0, 0, time.UTC)
+
+	// Current date
+	now := time.Now()
+
+	// Calculate the difference in years
+	years := now.Year() - firstDay.Year()
+
+	// Adjust if we haven't reached the anniversary this year yet
+	if now.Month() < firstDay.Month() ||
+	   (now.Month() == firstDay.Month() && now.Day() < firstDay.Day()) {
+		years--
+	}
+
+	return years
+}