Fix runtime config update by Server Options panel.

paskia/util/runtime.py

@@ -29,3 +29,31 @@ def _load_config() -> "RuntimeConfig | None":
         return None
 
     return msgspec.json.decode(config_json.encode(), type=RuntimeConfig)
+
+
+def update_runtime_config(new_config: Config) -> None:
+    """Update the runtime configuration with a new Config and refresh the cache."""
+    current_runtime = _load_config()
+    if not current_runtime:
+        return  # No runtime config to update
+
+    # Recompute site_url and site_path based on new config
+    site_path = "/" if new_config.auth_host else "/auth/"
+    if new_config.auth_host:
+        site_url = new_config.auth_host
+    elif new_config.origins:
+        site_url = new_config.origins[0]
+    else:
+        # Keep current site_url if no auth_host and no origins
+        site_url = current_runtime.site_url
+
+    new_runtime = RuntimeConfig(
+        config=new_config,
+        site_url=site_url,
+        site_path=site_path,
+        save=current_runtime.save,
+    )
+    os.environ["PASKIA_CONFIG"] = msgspec.json.encode(new_runtime).decode()
+
+    # Clear the cache so next access loads the updated config
+    _load_config.cache_clear()