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-multi-cli-plan/SKILL.md

@@ -1,7 +1,7 @@
 ---
 name: workflow-multi-cli-plan
 description: Multi-CLI collaborative planning and execution skill with integrated execution phase. Triggers on "workflow-multi-cli-plan".
-allowed-tools: Skill, Task, AskUserQuestion, TodoWrite, Read, Write, Edit, Bash, Glob, Grep, mcp__ace-tool__search_context
+allowed-tools: Skill, Agent, AskUserQuestion, TodoWrite, Read, Write, Edit, Bash, Glob, Grep, mcp__ace-tool__search_context
 ---
 
 # Workflow Multi-CLI Plan

.claude/skills/workflow-multi-cli-plan/phases/01-multi-cli-plan.md

@@ -132,7 +132,7 @@ const aceQueries = [
 
 **Agent Invocation**:
 ```javascript
-Task({
+Agent({
   subagent_type: "cli-discuss-agent",
   run_in_background: false,
   description: `Discussion round ${currentRound}`,
@@ -364,7 +364,7 @@ Write(`${sessionFolder}/context-package.json`, JSON.stringify(contextPackage, nu
 
 **Step 2: Invoke Planning Agent**:
 ```javascript
-Task({
+Agent({
   subagent_type: "cli-lite-planning-agent",
   run_in_background: false,
   description: "Generate implementation plan",

.claude/skills/workflow-multi-cli-plan/phases/02-lite-execute.md

@@ -369,7 +369,7 @@ function executeBatch(batch) {
 
   if (executor === 'agent') {
     // Agent execution (synchronous)
-    return Task({
+    return Agent({
       subagent_type: "code-developer",
       run_in_background: false,
       description: batch.taskSummary,