aisman

Session 159, Step 10: Conflict dialog when generating next step with cross-session linked story
- AIM-3042 Conflict dialog when generating next step with cross-session linked story
- AIM-3062 Story link title behavior improvements
- AIM-3064 Auto-rename story title when linking to session
- AIM-3065 Revert story title when unlinking from session
- AIM-3066 Auto-rename story title on programmatic re-link
- AIM-3067 Add filter icon to linked-stories filter button
- AIM-3063 AI prompt generation — prepend story title as H1 when non-default

Outcome:
Fixed cross-session conflict dialog (checkboxes pre-checked, cancel OK, deselect preserves content, filter works, merge title logic). Created6 distinct new issues from free text: parent issue -3660 grouping4 children — -3662 (auto-rename on link), -3663 (revert on unlink), -3664 (auto-rename on re-link), -3665 (filter icon) — plus standalone -3661 (AI prompt H1 prepend). Fixed validation function in dashboard-project.js to unconditionally detect free-text-without-new-issues. Added instruction to template to never edit .aisman/instructions/ files.