fix: address typo in completeGlobalOptions

Signed-off-by: Donnie Adams <[email protected]>

opts.go

@@ -29,15 +29,15 @@ func (g GlobalOptions) toEnv() []string {
 }
 
 func completeGlobalOptions(opts ...GlobalOptions) GlobalOptions {
-	result := GlobalOptions{}
+	var result GlobalOptions
 	for _, opt := range opts {
 		result.OpenAIAPIKey = firstSet(opt.OpenAIAPIKey, result.OpenAIAPIKey)
 		result.OpenAIBaseURL = firstSet(opt.OpenAIBaseURL, result.OpenAIBaseURL)
 		result.DefaultModel = firstSet(opt.DefaultModel, result.DefaultModel)
 		result.DefaultModelProvider = firstSet(opt.DefaultModelProvider, result.DefaultModelProvider)
 		result.Env = append(result.Env, opt.Env...)
 	}
-	return opts[0]
+	return result
 }
 
 func firstSet[T comparable](in ...T) T {