Fix remaining Snyk findings: XSS in validImageUrl, cipher integrity suppression

src/components/admin/media-grid.tsx

@@ -6,9 +6,10 @@ import { uploadMedia } from "@/actions/admin-media";
 type MediaFile = { name: string; url: string };
 
 function validImageUrl(url: string): string {
-  // Only allow relative URLs (starting with /) to prevent XSS via absolute URLs.
-  if (url.startsWith("/")) return url;
-  return "";
+  if (!url.startsWith("/")) return "";
+  if (/[<>"']/.test(url)) return "";
+  if (/(data|javascript|vbscript|file):/i.test(url)) return "";
+  return url;
 }
 
 export function AdminMediaGrid() {

src/components/admin/media-picker.tsx

@@ -6,9 +6,10 @@ import { uploadMediaAndReturn } from "@/actions/admin-media";
 type MediaFile = { name: string; url: string };
 
 function validImageUrl(url: string): string {
-  // Only allow relative URLs (starting with /) to prevent XSS via absolute URLs.
-  if (url.startsWith("/")) return url;
-  return "";
+  if (!url.startsWith("/")) return "";
+  if (/[<>"']/.test(url)) return "";
+  if (/(data|javascript|vbscript|file):/i.test(url)) return "";
+  return url;
 }
 
 export function MediaPicker({

src/lib/auth/laravel-encrypter.ts

@@ -30,6 +30,7 @@ export class LaravelEncrypter {
   encrypt(value: string, serialize = true): string {
     const iv = randomBytes(16);
     const data = serialize ? phpSerializeString(value) : value;
+    // snyk:ignore:javascript/CipherWithNoIntegrity
     // AES-256-CBC is required for Laravel compatibility. Integrity is provided
     // by the HMAC-SHA256 MAC (verified by decrypt before any output is returned),
     // not by the cipher mode itself. Switching to GCM would break existing
@@ -55,6 +56,7 @@ export class LaravelEncrypter {
       throw new Error("The MAC is invalid.");
     }
     const iv = Buffer.from(json.iv, "base64");
+    // snyk:ignore:javascript/CipherWithNoIntegrity
     // AES-256-CBC required for Laravel compatibility; MAC already verified
     // above so padding-oracle / tampering is not a risk.
     const decipher = createDecipheriv("aes-256-cbc", this.key, iv);