feat(model-connections): enhance model selection facts and auto pinning logic

surfsense_backend/app/config/__init__.py

@@ -434,7 +434,10 @@ def initialize_llm_router():
     router_settings = config.ROUTER_SETTINGS
 
     if not all_configs:
-        print("Info: No global LLM configs found, Auto mode will not be available")
+        print(
+            "Info: No global LLM configs found; global Auto pool is unavailable. "
+            "Auto can still use enabled BYOK models."
+        )
         return
 
     try:

surfsense_backend/app/routes/model_connections_routes.py

@@ -105,6 +105,15 @@ def _apply_model_facts(model: Model, facts: dict) -> None:
     model.supports_image_generation = facts.get("supports_image_generation")
 
 
+def _complete_selection_facts(conn: Connection, selection: ModelSelection) -> dict:
+    facts = selection.model_dump()
+    derived = derive_capabilities(conn, selection.model_id.strip(), selection.metadata)
+    for key, value in derived.items():
+        if facts.get(key) is None:
+            facts[key] = value
+    return facts
+
+
 def _selection_to_model(conn: Connection, selection: ModelSelection) -> Model:
     source = (
         selection.source
@@ -120,7 +129,7 @@ def _selection_to_model(conn: Connection, selection: ModelSelection) -> Model:
         enabled=selection.enabled,
         catalog=selection.metadata,
     )
-    _apply_model_facts(model, selection.model_dump())
+    _apply_model_facts(model, _complete_selection_facts(conn, selection))
     return model
 
 

surfsense_backend/app/services/auto_model_pin_service.py

@@ -541,12 +541,13 @@ async def resolve_or_get_pinned_llm_config_id(
     premium_eligible = (
         False if force_repin_free else await _is_premium_eligible(session, user_id)
     )
+    byok_candidates = [c for c in candidates if _tier_of(c) == "byok"]
     if premium_eligible:
         premium_candidates = [c for c in candidates if _tier_of(c) == "premium"]
         preferred_premium = [
             c for c in premium_candidates if _is_preferred_premium_auto_config(c)
         ]
-        eligible = preferred_premium or premium_candidates
+        eligible = preferred_premium or premium_candidates or byok_candidates
     else:
         eligible = [c for c in candidates if _tier_of(c) != "premium"]