/week: the Ledger, one week

1. git pull --rebase origin main, then python3 engine/darrow.py week (add --date if asked about another week).
2. Show the engine's table and summary lines as they are.
3. Add, from the plan files, a section at a time (python3 engine/darrow.py doc …):
   • Remaining this week: each day's planned sessions and doses (doc state "this week", then the session sections; the rhythm's structure is doc rules "program structure"), PT day, the optional items (and whether they're earned: a missed floor day costs next week its optional items, per doc addon 1, rule 1; this week's status: doc state 7).
   • Targets check: python3 engine/darrow.py recap --date <any day this week> has every average vs target and reference, weight vs last week and the guide's rule. Quote it; don't recompute.
   • Rehab flags from doc state patterns and real/NOW.md → Gate: e.g., floor X/7, swelling graded X/7, upper 2/2, bike 3/3, phase-gate items still open.
4. Real numbers only. No story, no week score. If he wants to know how the chapter is going, that's /saga.