feat(sprint83a): title_conflict_check template + project_review dispatch + atlas agent

- Add templates/title_conflict_check.yml: Atlas's 2x WebSearch title conflict pipeline with CLEAR/CAUTION/CONFLICT verdict
- Add title_conflict_check dispatch to templates/project_review.yml (PLANNING phase gate)
- Add title_conflict_check to agents/atlas/agent.yml supported_templates

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

templates/project_review.yml

@@ -34,6 +34,34 @@ steps:
       Otherwise: output exactly: {project.slug}
       One word only. No explanation.
 
+  - type: think
+    max_tokens: 400
+    output_key: title_check_content
+    hint: |
+      The current phase is: {project_phase}
+
+      If the phase is PLANNING (meaning no chapters have been written yet):
+      Write a title conflict check task message for this project.
+      Include:
+      - Book title: {project.name}
+      - Genre: [look it up from the project context above]
+      - Instruction: Check Amazon, Goodreads, and major publishers for exact or near-exact
+        title matches in the same genre that could cause reader confusion or marketing conflict.
+
+      If the phase is NOT PLANNING (WRITING, EDITORIAL, or COMPLETE):
+      Output exactly: none
+
+      Output ONLY the task message or the word none. No preamble.
+
+  - type: tool
+    action: enqueue_strategy
+    optional: true
+    params:
+      company_slug: "{company.slug}"
+      project_slug: "{project.slug}"
+      task_type: "title_conflict_check"
+      content: "{title_check_content}"
+
   - type: tool
     action: enqueue_strategy
     optional: true