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/home.go

@@ -46,7 +46,8 @@ func Home(db *sql.DB) http.HandlerFunc {
 			results = append(results, res)
 		}
 
-		context := BuildTemplateContext(db, w, r)
+		data := BuildTemplateData(db, w, r)
+		context := helpers.TemplateContext(w, r, data)
 		context["Data"] = results
 
 		tmpl := template.Must(template.New("").Funcs(helpers.TemplateFuncs()).ParseFiles(