fix(model): repair Discord Copilot /model flow

Keep Discord Copilot model switching responsive and current by refreshing picker data from the live catalog when possible, correcting the curated fallback list, and clearing stale controls before the switch completes.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

hermes_cli/models.py

@@ -155,10 +155,13 @@ _PROVIDER_MODELS: dict[str, list[str]] = {
         "gpt-4.1",
         "gpt-4o",
         "gpt-4o-mini",
-        "claude-opus-4.6",
         "claude-sonnet-4.6",
+        "claude-sonnet-4",
         "claude-sonnet-4.5",
         "claude-haiku-4.5",
+        "gemini-3.1-pro-preview",
+        "gemini-3-pro-preview",
+        "gemini-3-flash-preview",
         "gemini-2.5-pro",
         "grok-code-fast-1",
     ],
@@ -1932,6 +1935,7 @@ _COPILOT_MODEL_ALIASES = {
     "openai/o4-mini": "gpt-5-mini",
     "anthropic/claude-opus-4.6": "claude-opus-4.6",
     "anthropic/claude-sonnet-4.6": "claude-sonnet-4.6",
+    "anthropic/claude-sonnet-4": "claude-sonnet-4",
     "anthropic/claude-sonnet-4.5": "claude-sonnet-4.5",
     "anthropic/claude-haiku-4.5": "claude-haiku-4.5",
     # Dash-notation fallbacks: Hermes' default Claude IDs elsewhere use
@@ -1941,10 +1945,12 @@ _COPILOT_MODEL_ALIASES = {
     # "model_not_supported".  See issue #6879.
     "claude-opus-4-6": "claude-opus-4.6",
     "claude-sonnet-4-6": "claude-sonnet-4.6",
+    "claude-sonnet-4-0": "claude-sonnet-4",
     "claude-sonnet-4-5": "claude-sonnet-4.5",
     "claude-haiku-4-5": "claude-haiku-4.5",
     "anthropic/claude-opus-4-6": "claude-opus-4.6",
     "anthropic/claude-sonnet-4-6": "claude-sonnet-4.6",
+    "anthropic/claude-sonnet-4-0": "claude-sonnet-4",
     "anthropic/claude-sonnet-4-5": "claude-sonnet-4.5",
     "anthropic/claude-haiku-4-5": "claude-haiku-4.5",
 }