fix(bailian): read region/workspaceId from message.values for refresh models

When the user clicks 'Refresh Models' with unsaved region/workspaceId changes
in the settings form, resolve those values from message.values first (same
pattern as the API key) before falling back to the saved apiConfiguration.
Previously, only apiConfiguration was read, so a refresh request would hit
the previously-saved region endpoint instead of the one currently shown in
the form.

Author: F915

src/core/webview/webviewMessageHandler.ts

@@ -1031,14 +1031,13 @@ export const webviewMessageHandler = async (
 
 			// Bailian is conditional on apiKey
 			const bailianApiKey = message?.values?.bailianApiKey ?? apiConfiguration.bailianApiKey
+			const bailianRegion = message?.values?.bailianRegion ?? apiConfiguration.bailianRegion
+			const bailianWorkspaceId = message?.values?.bailianWorkspaceId ?? apiConfiguration.bailianWorkspaceId
 
 			if (bailianApiKey) {
 				let bailianBaseUrl: string
 				try {
-					bailianBaseUrl = getBailianBaseUrl(
-						apiConfiguration.bailianRegion,
-						apiConfiguration.bailianWorkspaceId,
-					)
+					bailianBaseUrl = getBailianBaseUrl(bailianRegion, bailianWorkspaceId)
 				} catch (e) {
 					// Region requires workspaceId but none configured -- skip model fetching
 					console.warn(`[requestRouterModels] Bailian: ${e instanceof Error ? e.message : String(e)}`)