refactor(PBI-49): remove data-debug-label from debugProps helper + test

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/debug.ts

@@ -1,16 +1,14 @@
 export type DebugProps = {
   'data-debug-id': string
-  'data-debug-label': string
 }
 
 export function debugProps(
   id: string,
-  component: string,
-  file: string
+  _component?: string,
+  _file?: string
 ): DebugProps | Record<string, never> {
   if (process.env.NODE_ENV === 'production') return {}
   return {
     'data-debug-id': id,
-    'data-debug-label': `${component} — ${file}`,
   }
 }