refactor: dynamicize agent profile section labels using provider-based slug mapping

lib/features/agents/presentation/providers/agent_detail_provider.dart

@@ -312,6 +312,22 @@ class AgentDetailState {
   String get bestExperienceLabel =>
       _labelForSlug('best_experience', 'Best Experience');
 
+  // Experience section labels (matches web mapFieldValuesToExperience)
+  String get yearsInExperienceLabel =>
+      _labelForSlug('years_in_business', 'Years in Experience');
+
+  String get contractsClosedLabel =>
+      _labelForSlug('contracts_completed', 'Number of contracts closed');
+
+  String get licensingAreasLabel =>
+      _labelForSlug('licensed_areas', 'Licensing & Areas');
+
+  String get expertiseYearsLabel =>
+      _labelForSlug('expertise_areas', 'Areas in expertise & Years');
+
+  String get certificationsLabel =>
+      _labelForSlug('certification_entries', 'Certifications');
+
   // ── Availability ──
 
   String get availabilityType {