fix(files): skip non-Claude image MIMEs in createFileContent

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: waleedlatif1

apps/sim/lib/uploads/utils/file-utils.ts

@@ -165,6 +165,10 @@ export function createFileContent(fileBuffer: Buffer, mimeType: string): Message
     return null
   }
 
+  if (contentType === 'image' && !CLAUDE_SUPPORTED_IMAGE_MIME_TYPES.has(mimeType.toLowerCase())) {
+    return null
+  }
+
   return {
     type: contentType,
     source: {
@@ -175,6 +179,13 @@ export function createFileContent(fileBuffer: Buffer, mimeType: string): Message
   }
 }
 
+const CLAUDE_SUPPORTED_IMAGE_MIME_TYPES = new Set([
+  'image/jpeg',
+  'image/png',
+  'image/gif',
+  'image/webp',
+])
+
 /**
  * Extract file extension from filename
  */