docs: decisions log, queue trim, HANDOFF rewrite — the map stops being a treadmill

TASKS.md 467 → 66 lines: one line per live item, detail stays in TASKS/
task-*.md. The old catalogue (63 rows of paragraph status prose plus the
historical narration) is preserved verbatim as TASKS/archive.md — a
2026-10-29 snapshot, not the live queue. The "out of product" list and every
retired decision moved to docs/ai/decisions.md with cause of death.

HANDOFF.md 440 → 40 lines, and it is now OVERWRITTEN, not appended: branch,
what's in flight, next action, live landmines, pending creator checks. History
belongs to git log; the previous handoff is reachable at ee3c592:HANDOFF.md.

docs/ai/decisions.md (new) collects what no longer governs: the paid tier and
its pricing, Polar, Store IAP, the Store route and why it died, the deleted
Velopack updater, signing economics, the retired monetization ideas, and the
permanent out-of-product list.

Facts that lived in the old ai.md "Current limitations" section were re-homed
rather than dropped with the router rewrite: OAuth/DPAPI/session behaviour →
docs/ai/youtube-api.md; paths, persistence and the Google project number →
docs/ai/environment.md.

verify.sh caps now cover all four always-read files (AGENTS 210, ai 100,
HANDOFF 40, TASKS 120).

Docs-only unit: scope-check run, no build.

scripts/verify.sh

@@ -35,6 +35,8 @@ check_budget() {
 }
 check_budget "AGENTS.md" 210
 check_budget "ai.md" 100
+check_budget "HANDOFF.md" 40
+check_budget "TASKS.md" 120
 
 echo "══ 2/4  CLEAN BUILD (expect 0 warnings) ══"
 "$DOTNET" clean "$ROOTWIN\\ytLive.csproj" > /dev/null