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/admin/draws.go

@@ -12,7 +12,7 @@ import (
 
 func NewDrawHandler(db *sql.DB) http.HandlerFunc {
 	return helpers.AuthMiddleware(func(w http.ResponseWriter, r *http.Request) {
-		context := helpers.TemplateContext(w, r)
+		context := helpers.TemplateContext(w, r, models.TemplateData{})
 
 		if r.Method == http.MethodPost {
 			game := r.FormValue("game_type")
@@ -75,7 +75,7 @@ func DeleteDrawHandler(db *sql.DB) http.HandlerFunc {
 
 func ListDrawsHandler(db *sql.DB) http.HandlerFunc {
 	return helpers.AuthMiddleware(func(w http.ResponseWriter, r *http.Request) {
-		context := helpers.TemplateContext(w, r)
+		context := helpers.TemplateContext(w, r, models.TemplateData{})
 		draws := []models.DrawSummary{}
 
 		rows, err := db.Query(`