Refactor WorkflowAgent and ClassifyIntentTool for improved clarity and performance

- Removed unused AgentTask import from WorkflowAgent to streamline code.
- Simplified complexity determination logic in ClassifyIntentTool by eliminating the complexityScore variable, enhancing readability and efficiency.

src/services/agents/WorkflowAgent.ts

@@ -1,11 +1,10 @@
 import {
-  AgentTask,
   AgentResult,
   AgentContext,
   ToolExecutionPlan,
 } from "../../types/tools";
 import { toolRegistry } from "../tools/ToolRegistry";
-import { ParsedIntent, WorkflowStructure, ValidationResult } from "../../types";
+import { ParsedIntent } from "../../types";
 
 export class WorkflowAgent {
   private context: AgentContext;

src/services/tools/ClassifyIntentTool.ts

@@ -200,14 +200,12 @@ Respond with JSON:
 
     // Determine complexity level
     let complexity = "SIMPLE";
-    let complexityScore = 0;
 
     Object.entries(complexityIndicators).forEach(([type, keywords]) => {
       const matches = keywords.filter((keyword) =>
         input.includes(keyword)
       ).length;
       if (matches > 0) {
-        complexityScore += matches;
         if (type === "complex" && matches >= 2) complexity = "ENTERPRISE";
         else if (type === "multiStep" && matches >= 2) complexity = "COMPLEX";
         else if (matches >= 1 && complexity === "SIMPLE")