fix(models): keep curated Anthropic aliases in /model picker (#43103)

The Anthropic picker returned the live /v1/models dump verbatim whenever
credentials were configured. Anthropic's API lags newly-routed curated
aliases (e.g. claude-fable-5, reachable on Anthropic before the models
endpoint enumerates it), so the curated entry vanished from the picker.

Merge curated _PROVIDER_MODELS["anthropic"] with the live catalog —
curated first, live-only appended, deduped — mirroring the OpenAI
curated-merge path. Live failure / no creds falls back to curated verbatim.

hermes_cli/models.py

@@ -2220,7 +2220,20 @@ def provider_model_ids(provider: Optional[str], *, force_refresh: bool = False)
     if normalized == "anthropic":
         live = _fetch_anthropic_models()
         if live:
-            return live
+            # The live /v1/models dump lags newly-routed curated aliases
+            # (e.g. claude-fable-5, which is reachable on Anthropic before it
+            # is enumerated by the models endpoint). Surface curated entries
+            # first, then append any live-only models, so a fresh curated
+            # model never disappears just because the API hasn't listed it yet.
+            curated = list(_PROVIDER_MODELS.get("anthropic", []))
+            merged = list(curated)
+            merged_lower = {m.lower() for m in curated}
+            for m in live:
+                if m.lower() not in merged_lower:
+                    merged.append(m)
+                    merged_lower.add(m.lower())
+            return merged
+        return list(_PROVIDER_MODELS.get("anthropic", []))
     if normalized == "ollama-cloud":
         live = fetch_ollama_cloud_models(force_refresh=force_refresh)
         if live: