Enhance prompt button for openrouter

src/api/index.ts

@@ -11,6 +11,10 @@ import { GeminiHandler } from "./providers/gemini"
 import { OpenAiNativeHandler } from "./providers/openai-native"
 import { ApiStream } from "./transform/stream"
 
+export interface SingleCompletionHandler {
+	completePrompt(prompt: string): Promise<string>
+}
+
 export interface ApiHandler {
 	createMessage(systemPrompt: string, messages: Anthropic.Messages.MessageParam[]): ApiStream
 	getModel(): { id: string; info: ModelInfo }