fix: discover Ollama on Docker host

dashboard/plugin_api.py

@@ -44,6 +44,20 @@ def _ollama_base_url() -> str:
     return "http://ollama:11434" if _running_in_container() else "http://localhost:11434"
 
 
+def _discover_ollama_endpoint() -> None:
+    global LOCAL_OLLAMA
+    if os.environ.get("OLLAMA_HOST", "").strip() or not _running_in_container():
+        return
+    candidates = ("http://ollama:11434", "http://host.docker.internal:11434")
+    for candidate in candidates:
+        try:
+            _json_request(candidate + "/api/version", timeout=2)
+        except (HTTPError, URLError, OSError, ValueError):
+            continue
+        LOCAL_OLLAMA = candidate
+        return
+
+
 LOCAL_OLLAMA = _ollama_base_url()
 REMOTE_OLLAMA = "https://ollama.com"
 CATALOG_FILE = "catalog.json"
@@ -274,6 +288,7 @@ def _valid_name(name: str) -> str:
 
 
 def _local_tags() -> list[dict[str, Any]]:
+    _discover_ollama_endpoint()
     try:
         payload = _json_request(LOCAL_OLLAMA + "/api/tags", timeout=15)
         models = payload.get("models", [])