feat(FN-3410): finalize planning verification and launcher updates

- Rework planning subtask descriptions and update planning logic/tests for clearer execution guidance
- Add launcher/update notice handling in cli-alias with package-config coverage and release script updates
- Refine agent detail and agents list UI/CSS for compressed mobile header behavior with updated dashboard tests
- Add changesets and related docs/readme touch-ups for release tracking
- Ref: runfusion/fusion#33

docs/task-management.md

@@ -22,6 +22,7 @@ Use the 💡 button to open planning mode:
 - AI reasoning (thinking output) is preserved and visible throughout the session — expand the reasoning toggle to review the model's analysis before answering each question or accepting the summary
 - Produces summary + key deliverables
 - Create one task or **Break into Tasks** (multi-task generation with dependencies)
+- Break-into-tasks descriptions are structured with subtask-specific guidance first, then a separate larger-plan context section (plus `## Planning Interview Context` when interview history exists)
 - Sessions persist when the modal is closed — resume from the sidebar list at any time; reasoning context is restored automatically
 
 ### 3) Todo item → Plan Mode