Apply item 0x4ac69e55 for issue #10

Squash of the patch of item 0x4ac69e554cfa29c1fb7819e9835c17153233e73e72ecb0b821628233c820eb3c, final in the elffuss ledger.
Solver 0xdd8075ba73c2173b9f05957b5f1a7561600e5494; 2 approvals of round 0.

T2T-Item: 0x4ac69e554cfa29c1fb7819e9835c17153233e73e72ecb0b821628233c820eb3c
T2T-Issue: 0xb8d7c6d9815eb6af5efae391d136467cda8c028200c2b5ec5a36fa6620196c53
T2T-Event: 0x96cb4689693dca2b068c24579b325bee24f431c0e6c31a1d7f0b39f8810f534f

web/js/model-cache.js

@@ -48,4 +48,8 @@ export async function clearModelCache() {
   if (navigator.serviceWorker && navigator.serviceWorker.controller)
     navigator.serviceWorker.controller.postMessage('clear-models');
   try { await caches.delete('elffuss-models-v1'); } catch { /* */ }
+  try {
+    const { clearAll } = await import('./runtime/model-store.js');
+    await clearAll();
+  } catch { /* sin almacén OPFS: nada que vaciar */ }
 }