refactor: mark dead exports with TODO, deduplicate field sanitization, fix import placement

src/lib/foundation/security.ts

@@ -182,6 +182,15 @@ export function canonicalize(input: string): string {
 	return input.normalize("NFC").trim();
 }
 
+/** Normalize, trim and truncate a form field value to maxLen (default 255). */
+export function sanitizeField(
+	value: FormDataEntryValue | null,
+	maxLen = 255,
+): string {
+	const s = canonicalize(String(value ?? ""));
+	return s.slice(0, maxLen);
+}
+
 const INVALID_FILENAME_CHARS = /[<>:"/\\|?*]/;
 
 function removeControlChars(s: string): string {
@@ -193,6 +202,7 @@ function removeControlChars(s: string): string {
 	return result;
 }
 
+// TODO: Check of dit weg kan — niet geïmporteerd in de codebase
 export function sanitizeFilename(name: string): string {
 	return removeControlChars(
 		name
@@ -212,6 +222,7 @@ export function canonicalizeFormValue(
 	return maxLen ? s.slice(0, maxLen) : s;
 }
 
+// TODO: Check of dit weg kan — niet geïmporteerd in de codebase
 export function canonicalizeFormData(
 	formData: FormData,
 	fields: Record<string, number | undefined>,