fix: resolve_alias prefers highest version + merges static catalog

Three bugs fixed in model alias resolution:

1. resolve_alias() returned the FIRST catalog match with no version
   preference. '/model mimo' picked mimo-v2-omni (index 0 in dict)
   instead of mimo-v2.5-pro. Now collects all prefix matches, sorts
   by version descending with pro/max ranked above bare names, and
   returns the highest.

2. models.dev registry missing newly added models (e.g. v2.5 for
   native xiaomi). resolve_alias() now merges static _PROVIDER_MODELS
   entries into the catalog so models resolve immediately without
   waiting for models.dev to sync.

3. hermes model picker showed only models.dev results (3 xiaomi models),
   hiding curated entries (5 total). The picker now merges curated
   models into the models.dev list so all models appear.

Also fixes a trailing-dot float parsing edge case in _model_sort_key
where '5.4.' failed float() and multi-dot versions like '5.4.1'
weren't parsed correctly.

hermes_cli/main.py

@@ -3984,7 +3984,18 @@ def _model_flow_api_key_provider(config, provider_id, current_model=""):
             pass
 
         if mdev_models:
-            model_list = mdev_models
+            # Merge models.dev with curated list so newly added models
+            # (not yet in models.dev) still appear in the picker.
+            if curated:
+                seen = {m.lower() for m in mdev_models}
+                merged = list(mdev_models)
+                for m in curated:
+                    if m.lower() not in seen:
+                        merged.append(m)
+                        seen.add(m.lower())
+                model_list = merged
+            else:
+                model_list = mdev_models
             print(f"  Found {len(model_list)} model(s) from models.dev registry")
         elif curated and len(curated) >= 8:
             # Curated list is substantial — use it directly, skip live probe