Eng-council sweep: export hygiene, dead code, helper dedup, declare vega-expression

src/app/services/transfer.ts

@@ -27,6 +27,7 @@ import {
   reassignCollidingSnippetIds,
 } from '@core/import-normalize';
 import { snippetSizeBytes } from '@core/snippet';
+import { humanizeBytes } from '@core/storage-estimate';
 import { downloadJson, readTextFile } from '../infrastructure/file-transfer';
 import { deleteSnippet, saveSnippet, StorageQuotaError } from '../infrastructure/snippet-store';
 import { notify } from '../stores/NotificationStore';
@@ -36,13 +37,6 @@ import { useSnippetStore } from '../stores/SnippetStore';
 /** Practical snippet-storage budget (spec §02 storage monitor / §08). */
 const SNIPPET_BUDGET_BYTES = 5 * 1024 * 1024;
 
-/** Round bytes to a short KB/MB string for the overage warning. */
-function formatBytes(bytes: number): string {
-  const kb = bytes / 1024;
-  if (kb < 1024) return `${Math.max(1, Math.round(kb))} KB`;
-  return `${Math.round(kb / 1024)} MB`;
-}
-
 /**
  * Export the whole workspace to a downloaded JSON file (spec §08 → Export).
  * Flushes the live editor buffer first so in-progress draft edits are included.
@@ -209,7 +203,7 @@ export async function importWorkspace(file: File): Promise<void> {
   }
   if (overage > 0) {
     clauses.push(
-      `This puts snippet storage about ${formatBytes(overage)} over the ~5 MB budget; ` +
+      `This puts snippet storage about ${humanizeBytes(overage)} over the ~5 MB budget; ` +
         `consider deleting some snippets.`,
     );
   }