fix(bailian): show correct model params for auto-fetched models in UI (#420)(#421)

- useSelectedModel bailian case: look up routerModels.bailian first, then
  static presets (same pattern as deepseek).
- ModelPicker: add optional sortModels prop for custom dropdown ordering.
- Bailian.tsx: pass sortModels that puts preset models (bailianModels)
  above API-fetched models, then alphabetical within each group.

Author: F915

webview-ui/src/components/settings/ModelPicker.tsx

@@ -68,6 +68,8 @@ interface ModelPickerProps {
 	onModelChange?: (modelId: string) => void
 	/** Hide the "search free" hint in the automatic fetch message (for providers without free models) */
 	hideFreeSearchHint?: boolean
+	/** Optional custom sort for the model dropdown. Defaults to alphabetical (localeCompare). */
+	sortModels?: (a: string, b: string) => number
 }
 
 export const ModelPicker = ({
@@ -87,6 +89,7 @@ export const ModelPicker = ({
 	displayTransform,
 	onModelChange,
 	hideFreeSearchHint,
+	sortModels,
 }: ModelPickerProps) => {
 	const { t } = useAppTranslation()
 
@@ -134,7 +137,7 @@ export const ModelPicker = ({
 				{} as Record<string, ModelInfo>,
 			)
 
-		return Object.keys(availableModels).sort((a, b) => a.localeCompare(b))
+		return Object.keys(availableModels).sort(sortModels ?? ((a, b) => a.localeCompare(b)))
 	}, [models, activeProvider, organizationAllowList, selectedModelId])
 
 	const [searchValue, setSearchValue] = useState("")

webview-ui/src/components/settings/providers/Bailian.tsx

@@ -145,6 +145,12 @@ export const Bailian = ({
 				errorMessage={modelValidationError}
 				simplifySettings={simplifySettings}
 				hideFreeSearchHint={true}
+				sortModels={(a, b) => {
+					const aPreset = Object.hasOwn(bailianModels, a)
+					const bPreset = Object.hasOwn(bailianModels, b)
+					if (aPreset !== bPreset) return aPreset ? -1 : 1
+					return a.localeCompare(b)
+				}}
 				onModelChange={(newModelId) =>
 					handleModelChangeSideEffects("bailian", newModelId, setApiConfigurationField)
 				}

webview-ui/src/components/ui/hooks/useSelectedModel.ts

@@ -292,12 +292,19 @@ function getSelectedModel({
 		}
 		case "bailian": {
 			const id = apiConfiguration.apiModelId ?? defaultModelId
-			const baseInfo = bailianModels[id as keyof typeof bailianModels]
-			// Custom models: merge default model info with bailianCustomModelInfo,
-			// matching the API handler's getModel() fallback.
-			// Note: supportsReasoningBinary is inherited from the default model
-			// (qwen3.6-plus). Custom models that do not support enable_thinking
-			// should disable reasoning via the UI checkbox.
+			// Look up in routerModels (API-fetched) first, then static presets.
+			// This ensures auto-fetched models show their actual parameters
+			// instead of falling back to the default model's metadata.
+			// Follows the same pattern as the deepseek case.
+			const routerInfo = routerModels.bailian?.[id]
+			const staticInfo = bailianModels[id as keyof typeof bailianModels]
+			const baseInfo = routerInfo ?? staticInfo
+			// Custom models (typed by user, not in any source): merge
+			// default model info with bailianCustomModelInfo, matching
+			// the API handler's getModel() fallback.
+			// Note: supportsReasoningBinary is inherited from the default
+			// model (qwen3.6-plus). Custom models that do not support
+			// enable_thinking should disable reasoning via the UI checkbox.
 			const effectiveInfo = baseInfo ?? {
 				...bailianModels[defaultModelId as keyof typeof bailianModels],
 				...(apiConfiguration.bailianCustomModelInfo || {}),