refactor: replace Task tool with Agent tool and fix schema compliance

## Task -> Agent Replacement
- Replace all Task({}) calls with Agent({}) across .claude/ directory
- Update allowed-tools declarations from Task to Agent
- Update documentation references from "Task tool" to "Agent tool"

## Schema Compliance Fixes

### Agent Schema
- Add missing required `description` parameter in 6 files
- Add missing `run_in_background: false` for subagent calls
- Add missing `subagent_type` parameter

### AskUserQuestion Schema
- Fix issue-manage/SKILL.md: reduce options from 5 to 4 (max allowed)

### SendMessage Schema
- Fix team-worker.md: use correct params (type, content, summary)
- Remove invalid `team_name` parameter

### TaskCreate/TaskUpdate Schema
- Remove invalid `blockedBy`, `owner`, `status` from TaskCreate calls
- Use separate TaskUpdate calls for dependencies and ownership
- Fix TaskUpdate syntax to use object parameter

### TeamDelete Schema
- Remove parameters from TeamDelete() calls (should be no params)

### TaskOutput Schema
- Fix Python-style syntax to JavaScript object syntax

## Files Changed
- 146 files updated across commands/, skills/, skills_lib/, agents/

.claude/skills/workflow-skill-designer/SKILL.md

@@ -1,7 +1,7 @@
 ---
 name: workflow-skill-designer
 description: Meta-skill for designing orchestrator+phases structured workflow skills. Creates SKILL.md coordinator with progressive phase loading, TodoWrite patterns, and data flow. Triggers on "design workflow skill", "create workflow skill", "workflow skill designer".
-allowed-tools: Task, AskUserQuestion, TodoWrite, Read, Write, Edit, Bash, Glob, Grep
+allowed-tools: Agent, AskUserQuestion, TodoWrite, Read, Write, Edit, Bash, Glob, Grep
 ---
 
 # Workflow Skill Designer

.claude/skills/workflow-skill-designer/phases/01-requirements-analysis.md

@@ -216,7 +216,7 @@ const workflowConfig = {
   title: "Workflow Plan",               // Human-readable
   description: "5-phase planning...",   // One-line description
   triggers: ["workflow-plan"],          // Trigger phrases
-  allowedTools: ["Task", "AskUserQuestion", "TodoWrite", "Read", "Write", "Edit", "Bash", "Glob", "Grep", "Skill"],
+  allowedTools: ["Agent", "AskUserQuestion", "TodoWrite", "Read", "Write", "Edit", "Bash", "Glob", "Grep", "Skill"],
 
   // Source information
   source: {

.claude/skills/workflow-skill-designer/phases/03-phase-design.md

@@ -303,7 +303,7 @@ function generatePhaseFromRequirements(phase, config) {
     for (const agentType of phase.agentTypes) {
       phaseContent += `### Step: ${agentType} Delegation\n\n`;
       phaseContent += '```javascript\n';
-      phaseContent += `const result = Task({\n`;
+      phaseContent += `const result = Agent({\n`;
       phaseContent += `  subagent_type: "${mapAgentType(agentType)}",\n`;
       phaseContent += `  prompt: \`\n`;
       phaseContent += `    [ROLE] ${agentType}\n`;