docs: Sprint 15 round 2 — +18 recipes, library at 67 total, LLM 21/21

Sprint 15 round 2 (commit 97b84a7) added seed_recipes_round2.py
which seeded 18 more Spoonacular recipes today. Library went
49 -> 67 total. LLM test (Sprint 13 endpoint, week 2026-07-20):
  {picked_count: 0, filled_count: 21, failed_count: 0}
The library now covers all 21 slots of a week (was 19/21 + 2
failed in round 1).

This commit updates the 6 running docs:

- .agent/plan.md — Sprint 15 Round 2 section (S15R2.1-S15R2.4
  + Done when + Out of scope) added after the round 1 sections.
  50-query list documented by category.
- .agent/context.md — Round 2 decisions (D7-D10) added: list
  focuses on cuisines round 1 didn't cover, round 2 is a
  separate script, library at 67 with 21/21 LLM coverage.
- Review/sprint15-verification.md — Round 2 section appended
  with: 50-query list, 18-imported result, 12 no-hits, 1 402,
  updated DB state (37 Spoonacular + 30 manual = 67), LLM
  test result, round 3 follow-up ticket.
- Review/ui-nielsen-audit.md — Round 2 paragraph added to the
  Sprint 15 status block.
- fix-ui-audit.md — T8.6 added to the Sprint 15 section.
- Review/handoff-ui-audit.md — TL;DR and Sprint 15 section
  updated with round 2.
- docs/HANDOFF.md — Round 2 paragraph added to the Sprint 15
  section, Last-updated footer updated.

All 6 docs now reflect Sprint 15 round 2. Library has 67 unique
recipes — 1.25x rotation across 4 weeks of planning. Round 3
can add 30+ more by re-running scripts/seed_recipes.py on the
next day (its query list has round 1 cap-blocked American +
Mediterranean cuisines still to import).

Review/handoff-ui-audit.md

@@ -34,6 +34,7 @@ If you are a new agent continuing this work, do this **in order**:
 - The §Future backlog is now empty: F1 (onboarding) shipped as Sprint 9; the dead "Generate Meal Plan" CTA shipped as Sprint 11; F8 (Spoonacular) shipped as Sprint 12; F9-lite shipped as Sprint 13. All four are deployment-pending. F9-full (local Ollama model pull) is the only remaining §Future item — opt-in based on cloud-billing feedback.
 - **Sprint 14 (Vitest for `useOnboarding`, Q4) code complete on 2026-06-05.** 7/7 tests green in ~25 ms, `npm run build` green, no runtime dep change. Awaiting commit + push. Closes the open Q4 from Sprint 9.
 - **Sprint 15 (Seed 50 family-friendly recipes + Sprint 12 latent-bug fix) code complete on 2026-06-06.** 18 Spoonacular recipes imported (free-tier 50-pt cap hit; remaining 32 to be seeded on later days). DB went 31 → 49 total recipes. LLM test for week 2026-07-06: `picked_count=0 / filled_count=19 / failed_count=2` (library fill covered 19/21 slots). Sprint 12 latent-bug fix: `main.py` mount order. Awaiting commit + push.
+- **Sprint 15 Round 2 (2026-06-07):** +18 recipes via `scripts/seed_recipes_round2.py`. Library at 67 total. LLM test for week 2026-07-20: `picked_count=0 / filled_count=21 / failed_count=0` (library now covers all 21 slots of a week). Awaiting commit + push.
 - Pre-existing repo issues: 1 failing test (`test_filter_blocks_by_cost` — verified pre-Sprint 8), `.gitignore` `lib/` bug, no CI. Documented.
 
 ---
@@ -163,7 +164,9 @@ If you are a new agent continuing this work, do this **in order**:
 
 **No pre-existing WIP files touched.** Only `main.py` was reordered (one-line + comment); `recipes.py`, `schemas/recipe.py`, `nginx.conf` are unchanged.
 
-**Tracking docs:** `Review/sprint15-verification.md` (full 18-imported breakdown by cuisine + free-tier math + LLM test + 6-risk table + deploy + 2 follow-up tickets), `Review/ui-nielsen-audit.md` Sprint 15 status block (T8.1-T8.3), `fix-ui-audit.md` Sprint 15 section (T8.1-T8.5), this file, `docs/HANDOFF.md` Sprint 15 section.
+**Tracking docs:** `Review/sprint15-verification.md` (full 18-imported breakdown by cuisine + free-tier math + LLM test + 6-risk table + deploy + 2 follow-up tickets + Round 2 follow-up section), `Review/ui-nielsen-audit.md` Sprint 15 status block (T8.1-T8.3 + Round 2 paragraph), `fix-ui-audit.md` Sprint 15 section (T8.1-T8.6), this file, `docs/HANDOFF.md` Sprint 15 section.
+
+**Sprint 15 Round 2 (2026-06-07):** +18 recipes via `scripts/seed_recipes_round2.py` (NEW). Library at 67 total. LLM test for week 2026-07-20: `picked_count=0 / filled_count=21 / failed_count=0` (library now covers all 21 slots of a week). Tracking: appended to `Review/sprint15-verification.md`.
 
 ### Sprint 7 — Fix webui "empty meal plan" (date-semantics mismatch)