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/commands/workflow/refactor-cycle.md

@@ -2,7 +2,7 @@
 name: refactor-cycle
 description: Tech debt discovery and self-iterating refactoring with multi-dimensional analysis, prioritized execution, regression validation, and reflection-driven adjustment
 argument-hint: "[-y|--yes] [-c|--continue] [--scope=module|project] \"module or refactoring goal\""
-allowed-tools: TodoWrite(*), Task(*), AskUserQuestion(*), Read(*), Grep(*), Glob(*), Bash(*), Edit(*), Write(*)
+allowed-tools: TodoWrite(*), Agent(*), AskUserQuestion(*), Read(*), Grep(*), Glob(*), Bash(*), Edit(*), Write(*)
 ---
 
 ## Auto Mode
@@ -200,7 +200,7 @@ Closed-loop tech debt lifecycle: **Discover → Assess → Plan → Refactor →
 1. **Codebase Exploration via cli-explore-agent**
 
 ```javascript
-Task({
+Agent({
   subagent_type: "cli-explore-agent",
   run_in_background: false,
   description: `Explore codebase for debt: ${topicSlug}`,
@@ -465,7 +465,7 @@ Set `state.json.current_item` to item ID.
 #### Step 4.2: Execute Refactoring
 
 ```javascript
-Task({
+Agent({
   subagent_type: "code-developer",
   run_in_background: false,
   description: `Refactor ${item.id}: ${item.title}`,
@@ -499,7 +499,7 @@ ${JSON.stringify(item.refactor_plan, null, 2)}
 
 ```javascript
 // 1. Run tests
-Task({
+Agent({
   subagent_type: "test-fix-agent",
   run_in_background: false,
   description: `Validate refactoring: ${item.id}`,