feat: 重构对话功能

electron/providers/BaseProvider.ts

@@ -1,4 +1,12 @@
+export interface ChatOptions {
+  signal?: AbortSignal;
+}
+
+export interface GatewayChatMessage {
+  role: 'system' | 'user' | 'assistant' | 'tool';
+  content: string;
+}
 
 export abstract class BaseProvider {
-  abstract chat(messages: DialogueMessageProps[], modelName: string): Promise<AsyncIterable<UniversalChunk>>
+  abstract chat(messages: GatewayChatMessage[], modelName: string, options?: ChatOptions): Promise<AsyncIterable<UniversalChunk>>
 }