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/team-quality-assurance/SKILL.md

@@ -1,7 +1,7 @@
 ---
 name: team-quality-assurance
 description: Unified team skill for quality assurance team. All roles invoke this skill with --role arg for role-specific execution. Triggers on "team quality-assurance", "team qa".
-allowed-tools: TeamCreate(*), TeamDelete(*), SendMessage(*), TaskCreate(*), TaskUpdate(*), TaskList(*), TaskGet(*), Task(*), AskUserQuestion(*), Read(*), Write(*), Edit(*), Bash(*), Glob(*), Grep(*)
+allowed-tools: TeamCreate(*), TeamDelete(*), SendMessage(*), TaskCreate(*), TaskUpdate(*), TaskList(*), TaskGet(*), Agent(*), AskUserQuestion(*), Read(*), Write(*), Edit(*), Bash(*), Glob(*), Grep(*)
 ---
 
 # Team Quality Assurance
@@ -359,7 +359,7 @@ Beat  1       2       3              4              5       6
 When coordinator spawns workers, use `team-worker` agent with role-spec path:
 
 ```
-Task({
+Agent({
   subagent_type: "team-worker",
   description: "Spawn <role> worker",
   team_name: "quality-assurance",
@@ -397,7 +397,7 @@ Execute built-in Phase 1 (task discovery) -> role-spec Phase 2-4 -> built-in Pha
 **Parallel spawn template**:
 
 ```
-Task({
+Agent({
   subagent_type: "team-worker",
   description: "Spawn <role>-<N> worker",
   team_name: "quality-assurance",
@@ -443,7 +443,7 @@ AskUserQuestion({
 
 | Choice | Action |
 |--------|--------|
-| Archive & Clean | Update session status="completed" -> TeamDelete(quality-assurance) -> output final summary |
+| Archive & Clean | Update session status="completed" -> TeamDelete() -> output final summary |
 | Keep Active | Update session status="paused" -> output resume instructions: `Skill(skill="team-quality-assurance", args="resume")` |
 | Export Results | AskUserQuestion for target path -> copy deliverables -> Archive & Clean |
 

.claude/skills/team-quality-assurance/roles/coordinator/commands/monitor.md

@@ -131,7 +131,7 @@ const STAGE_WORKER_MAP = {
 5. Spawn team-worker (one at a time for sequential pipeline):
 
 ```
-Task({
+Agent({
   subagent_type: "team-worker",
   description: "Spawn <role> worker for <task-id>",
   team_name: "quality-assurance",