feat(pr-review): add task hierarchy visualization

Introduce ASCII tree visualization of task hierarchy for debugging purposes. This includes generating task statistics such as total tasks, done, failed, and in-progress tasks.

Author: ibacalu

src/workflows_mcp/templates/agents/pr-review/action/main.yaml

@@ -187,6 +187,22 @@ blocks:
           platform: "{{ inputs.platform }}"
           approve: "{{ inputs.approve }}"
 
+  # ============================================================================
+  # VISUALIZATION: Generate ASCII tree of task hierarchy
+  # ============================================================================
+  - id: visualize_state
+    type: Workflow
+    description: Generate ASCII tree visualization of task hierarchy for debugging.
+    condition: "{{ inputs.state | trim != '' }}"
+    depends_on:
+      - track_done
+    inputs:
+      workflow: agent-state-visualize
+      inputs:
+        state: "{{ inputs.state }}"
+        show_data: true
+        max_depth: 0
+
 outputs:
   final_report:
     value: "{{ inputs.report }}"
@@ -208,3 +224,13 @@ outputs:
       {{ blocks.post_github_comment.succeeded or blocks.post_gitlab_comment.succeeded }}
     type: bool
     description: "Whether a comment was successfully posted to the remote platform."
+
+  task_tree:
+    value: "{{ blocks.visualize_state.outputs.tree | default('') }}"
+    type: str
+    description: "ASCII tree visualization of task hierarchy."
+
+  task_summary:
+    value: "{{ blocks.visualize_state.outputs.summary | default({}) }}"
+    type: dict
+    description: "Task statistics (total_tasks, done, failed, in_progress, etc.)."

src/workflows_mcp/templates/agents/pr-review/main.yaml

@@ -136,6 +136,7 @@ blocks:
         repo_path: "{{ inputs.repo_path }}"
         base_branch: "{{ inputs.base_branch }}"
         head_branch: "{{ inputs.head_branch }}"
+        workspace: "{{ tmp }}/pr-review-repo"
         state: "{{ blocks.state_management.outputs.state }}"
         parent_task_id: "{{ get(blocks.state_management.outputs.task, 'task_id', '') }}"
 
@@ -259,3 +260,13 @@ outputs:
     value: "{{ blocks.initial_assessment.outputs.risk_level }}"
     type: str
     description: "Overall risk level assessment: critical, high, medium, low."
+
+  task_tree:
+    value: "{{ blocks.action.outputs.task_tree | default('') }}"
+    type: str
+    description: "ASCII tree visualization of task hierarchy for debugging."
+
+  task_summary:
+    value: "{{ blocks.action.outputs.task_summary | default({}) }}"
+    type: dict
+    description: "Task statistics (total_tasks, done, failed, total_duration, etc.)."