feat: 优化情景切换功能

backend/internal/eino/adapter.go

@@ -109,7 +109,17 @@ func (e *EinoOrchestrator) ProcessQuery(
 	ctx = WithRequestID(ctx, req.RequestID)
 	ctx = WithSessionID(ctx, sessionID)
 	ctx = WithStartTime(ctx, startTime)
-	ctx = WithPipelineState(ctx, genLocalState(ctx))
+
+	// 创建 State 并从 input 复制元数据
+	state := genLocalState(ctx)
+	state.SessionID = input.SessionID
+	state.RequestID = input.RequestID
+	state.ImageData = input.ImageData
+	state.Scenario = input.Scenario
+	state.Language = input.Language
+	state.DetailLevel = sess.Config.DetailLevel
+	state.TTSEnabled = input.TTSEnabled
+	ctx = WithPipelineState(ctx, state)
 
 	// 6. 调用 Graph（Stream 模式 + 运行时 Callback）
 	streamReader, err := e.graph.Runnable.Stream(ctx, input, e.callbacks)