Fix: Add 'roo' provider to checkExistKey function

- Added 'roo' to the special case list in checkExistApiConfig.ts
- This allows the welcome screen to dismiss properly for Roo Code Cloud provider
- Roo provider uses cloud authentication instead of API keys, so it doesn't need configuration

Author: daniel-lxs

src/shared/checkExistApiConfig.ts

@@ -5,8 +5,8 @@ export function checkExistKey(config: ProviderSettings | undefined) {
 		return false
 	}
 
-	// Special case for human-relay, fake-ai, and claude-code providers which don't need any configuration.
-	if (config.apiProvider && ["human-relay", "fake-ai", "claude-code"].includes(config.apiProvider)) {
+	// Special case for human-relay, fake-ai, claude-code, and roo providers which don't need any configuration.
+	if (config.apiProvider && ["human-relay", "fake-ai", "claude-code", "roo"].includes(config.apiProvider)) {
 		return true
 	}