chore(agent): phase roadmap from TODO.md, 2 phases

Convert the two TODO items into append-mode phases (Protocol B):
18_nav_hamburger (TODO L3) and 19_ups_events_expandable (TODO L4),
numbered after the existing todo phases. TODO.md is cleared to an
empty list; its items now live in .agents/phases/todo/.

LLM-Generated: true

TODO.md

@@ -1,4 +1 @@
 # TODO
-
-- [ ] The nav bar needs to collapse into a hamburger like brain of reese does
-- [ ] The UPS tab should have an expandable, clear list of last incidents with dates/times