fix(frontend): add finalize guard to model fetch for cancellation cleanup

Mirror the defensive pattern from the tasks fetch so that when
takeUntil(destroy$) cancels mid-flight, inFlightByTag is cleared
and subsequent component instances can re-fetch instead of polling
forever.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ELin2025

frontend/src/app/workspace/component/hugging-face/hugging-face.component.ts

@@ -360,7 +360,16 @@ export class HuggingFaceComponent extends FieldType<FieldTypeConfig> implements
         `${AppSettings.getApiEndpoint()}/huggingface/models?task=${encodeURIComponent(tag)}`,
         { observe: "response" }
       )
-      .pipe(takeUntil(this.destroy$))
+      .pipe(
+        takeUntil(this.destroy$),
+        finalize(() => {
+          // If takeUntil cancels before next/error fires, clear the in-flight
+          // guard so a later instance re-fetches instead of polling forever.
+          if (!allModelsByTag.has(tag) && !errorByTag.has(tag)) {
+            inFlightByTag.delete(tag);
+          }
+        })
+      )
       .subscribe({
         next: resp => {
           const models = resp.body ?? [];