Enhance workflow routing and agent configuration management

- Introduce WorkflowLLMRouter for pre-response LLM routing, allowing agents to determine the appropriate function to call based on user input.
- Implement UserTurnRoutingProcessor to manage user turns before reaching the LLM, ensuring proper routing and handling of user messages.
- Refactor WorkflowBrain to integrate new routing logic and enhance agent stage configuration, including entry modes and resource management.
- Update service factory to support dynamic LLM resource configuration based on workflow settings.
- Add tests for new routing functionality and ensure proper handling of user messages in various scenarios.

frontend/src/components/workflow/GenericNode.tsx

@@ -30,14 +30,24 @@ export function GenericNode({ id, type, data, selected }: NodeProps) {
   const preview = (nodeData.greeting || nodeData.prompt || nodeData.message || "")
     .toString()
     .trim();
+  const entryModeLabel = {
+    wait_user: "等待用户",
+    generate: "立即回复",
+    fixed_speech: "固定进入语",
+  }[nodeData.entryMode ?? "wait_user"];
+  const inheritsGlobal = nodeData.inheritGlobalConfig !== false;
   const meta = type === "agent"
-    ? [
-        nodeData.contextPolicy === "fresh" ? "独立上下文" : "继承上下文",
-        `${nodeData.toolIds?.length ?? 0} 工具`,
-        nodeData.knowledgeBaseId ? "知识库" : null,
-        nodeData.asrResourceId ? "独立 ASR" : null,
-        nodeData.ttsResourceId ? "独立 TTS" : null,
-      ].filter(Boolean)
+    ? inheritsGlobal
+      ? [entryModeLabel, "继承全局配置"]
+      : [
+          entryModeLabel,
+          "自定义配置",
+          nodeData.llmResourceId ? "独立 LLM" : null,
+          `${nodeData.toolIds?.length ?? 0} 工具`,
+          nodeData.knowledgeBaseId ? "知识库" : null,
+          nodeData.asrResourceId ? "独立 ASR" : null,
+          nodeData.ttsResourceId ? "独立 TTS" : null,
+        ].filter(Boolean)
     : type === "action" && nodeData.toolId
       ? ["确定性工具"]
       : [];

frontend/src/components/workflow/specs.ts

@@ -8,6 +8,7 @@ import type { NodeSpecDto } from "@/lib/api";
 export type WorkflowNodeType = "start" | "agent" | "action" | "handoff" | "end";
 export type ContextPolicy = "inherit" | "fresh";
 export type KnowledgeMode = "automatic" | "on_demand" | "disabled";
+export type AgentEntryMode = "wait_user" | "generate" | "fixed_speech";
 export type EdgeMode = "llm" | "expression" | "always";
 export type ExpressionOperator =
   | "eq"
@@ -25,11 +26,15 @@ export type WorkflowNodeData = {
   greeting?: string;
   prompt?: string;
   contextPolicy?: ContextPolicy;
+  inheritGlobalConfig?: boolean;
+  entryMode?: AgentEntryMode;
+  entrySpeech?: string;
   toolIds?: string[];
   knowledgeBaseId?: string;
   knowledgeMode?: KnowledgeMode;
   knowledgeTopN?: number;
   knowledgeScoreThreshold?: number;
+  llmResourceId?: string;
   asrResourceId?: string;
   ttsResourceId?: string;
   toolId?: string;
@@ -129,8 +134,14 @@ export type WorkflowGraph = {
   specVersion: 3;
   settings: {
     globalPrompt: string;
+    defaultLlmResourceId: string;
     defaultAsrResourceId: string;
     defaultTtsResourceId: string;
+    toolIds: string[];
+    knowledgeBaseId: string;
+    knowledgeMode: "automatic" | "on_demand";
+    knowledgeTopN: number;
+    knowledgeScoreThreshold: number;
   };
   nodes: Array<{
     id: string;
@@ -153,8 +164,14 @@ export function defaultGraph(): WorkflowGraph {
     settings: {
       globalPrompt:
         "你是一个友好、专业的语音助手。请使用简短、自然、适合口语表达的句子。",
+      defaultLlmResourceId: "",
       defaultAsrResourceId: "",
       defaultTtsResourceId: "",
+      toolIds: [],
+      knowledgeBaseId: "",
+      knowledgeMode: "automatic",
+      knowledgeTopN: 5,
+      knowledgeScoreThreshold: 0,
     },
     nodes: [
       {
@@ -174,10 +191,9 @@ export function defaultGraph(): WorkflowGraph {
           name: "Agent",
           prompt: "了解用户需求并提供清晰、准确的帮助。",
           contextPolicy: "inherit",
-          toolIds: [],
-          knowledgeMode: "disabled",
-          knowledgeTopN: 5,
-          knowledgeScoreThreshold: 0,
+          inheritGlobalConfig: true,
+          entryMode: "wait_user",
+          entrySpeech: "",
         },
       },
       {