Cleanup: Finalize template context integration and remove legacy code

- Replaced legacy TemplateContext calls with structured TemplateData usage
- Removed unused variables and redundant storage calls in notifications handler
- Ensured consistent use of BuildTemplateData across user-facing handlers
- Resolved all compile-time errors from refactor
- Ready for runtime testing and further layout integration

handlers/ticket_handler.go

@@ -40,7 +40,7 @@ func AddTicket(db *sql.DB) http.HandlerFunc {
 				}
 			}
 
-			context := helpers.TemplateContext(w, r)
+			context := helpers.TemplateContext(w, r, models.TemplateData{})
 			context["csrfField"] = csrf.TemplateField(r)
 			context["DrawDates"] = drawDates
 
@@ -359,7 +359,7 @@ func GetMyTickets(db *sql.DB) http.HandlerFunc {
 			tickets = append(tickets, t)
 		}
 
-		context := helpers.TemplateContext(w, r)
+		context := helpers.TemplateContext(w, r, models.TemplateData{})
 		context["Tickets"] = tickets
 
 		tmpl := template.Must(template.New("").Funcs(helpers.TemplateFuncs()).ParseFiles(