docs: Sprint 15 — seed 50 recipes + Sprint 12 latent-bug fix across all 6 running docs

Sprint 15 (commit a3c89bf) does two things: (1) reorders
backend/app/main.py so recipe_search_api.router mounts BEFORE
the WIP recipes_api.public_router (fixes a Sprint 12 latent
bug where /api/recipes/search was shadowed by the WIP's GET
/{recipe_id} returning 422); (2) adds scripts/seed_recipes.py
which seeded 18 Spoonacular recipes into the local library
today (free-tier 50-pt cap hit; remaining 32 to seed on later
days via the same idempotent script). DB went 31 -> 49 total
recipes.

This commit updates the 6 running docs that track sprints:

- .agent/plan.md — Sprint 15 section (S15.1-S15.4 + Done
  when + Out of scope) added after Sprint 14's out-of-scope.
- .agent/context.md — Sprint 15 decisions (D1-D6), open
  questions (Q1-Q2), and file:line references added.
- Review/sprint15-verification.md — NEW: full 18-imported
  breakdown by cuisine + free-tier math correction (50 pts/day,
  not 150) + LLM test (picked_count=0, filled_count=19,
  failed_count=2 for week 2026-07-06) + 6-risk table + deploy
  + 2 follow-up tickets (lower _DAILY_LIMIT, re-run script).
- Review/ui-nielsen-audit.md — Sprint 15 status block
  (T8.1-T8.3) added after the Sprint 14 block. Notes the
  Sprint 12 latent-bug fix as the critical change for the
  upcoming Sprint 12 deploy.
- fix-ui-audit.md — Sprint 15 section (T8.1-T8.5) added after
  the Sprint 14 section. T8.1 documents the main.py mount
  order fix in detail. T8.5 surfaces 2 follow-up tickets.
- Review/handoff-ui-audit.md — Batch K line in the deploy
  list, Sprint 15 section after Sprint 14, TL;DR Sprint 15
  line, Last-updated footer updated.
- docs/HANDOFF.md — Sprint 15 section after Sprint 14, Last-
  updated footer updated. Notes the corrected free-tier math
  and the 2 follow-up tickets.

All 6 docs now reflect Sprint 15. The Sprint 12 latent-bug
fix is documented as a hard prerequisite for the upcoming
Sprint 12 deploy (without it, every 'Search the web' query
would 422). Re-running scripts/seed_recipes.py on a later
day will add the remaining 32 recipes (the script is
idempotent — already-imported IDs return 409 and are
skipped).

Review/ui-nielsen-audit.md

@@ -146,6 +146,14 @@ The app looks polished on the surface (Tailwind palette, clean cards, working to
 > - **Verification log:** `Review/sprint14-verification.md`. `npm run build` still green (bundle 503.82 kB unchanged). No migration. No backend change. Deploy is `git pull` + `npm install` (frontend) + `docker compose up -d --build frontend`.
 > - **No new runtime dependencies. No migration. Admin path unchanged. Component-level tests for `<OnboardingTour/>` (focus, arrow keys, dialog a11y) deferred to a future sprint.**
 >
+> **Sprint 15 status (in progress 2026-06-06, code complete, awaiting commit + push):** Content op + Sprint 12 latent-bug fix. (1) **Sprint 12 bug fix:** `backend/app/main.py` reorders the `recipe_search_api.router` mount to BEFORE the WIP's `recipes_api.public_router` so the WIP's `GET /{recipe_id}` no longer shadows `/search` and `/import`. Without this fix, every Sprint 12 frontend query would 422. (2) **Sprint 15 content op:** `scripts/seed_recipes.py` (NEW, ~150 lines) seeds 50 family-friendly recipes from Spoonacular. 18 imported today (Spoonacular free-tier cap is 50 pts/day, not 150; remaining 32 to import on future days via the same script, which is idempotent). DB went from 31 → 49 total recipes (19 Spoonacular + 30 manual). LLM test (Sprint 13 endpoint) for week 2026-07-06 returned `picked_count=0 / filled_count=19 / failed_count=2` — the library fill covered 19 of 21 slots, the LLM (kimi-k2.6:cloud) returned 0 picks.
+> - **T8.1** `backend/app/main.py` — moved `recipe_search_api.router` import to line 39 (with the other api imports) and the `include_router` call to before `recipes_api.public_router` mount. Three-line comment explains the why. Verified: `GET /api/recipes/search?q=...` returns 200 with hits; `POST /api/recipes/import` still 201.
+> - **T8.2** `scripts/seed_recipes.py` (NEW) — 50-query list (5 cuisines × 10 each), direct `complexSearch` + backend `import`. 1.5 sec sleep. Idempotent (409 logged). Stops cleanly on 402.
+> - **T8.3** Follow-up: `_DAILY_LIMIT=140` in `backend/app/api/recipe_search.py:48` should drop to 45 to match the actual 50-pt free tier. Not blocking.
+> - **Verification log:** `Review/sprint15-verification.md` (full breakdown of 18 imported, free-tier math, LLM test, risk table).
+> - **No new runtime dependencies. No schema changes. No UI changes. Deploy is `git pull` + `docker compose up -d --build backend frontend` (backend picks up the main.py fix; the 18 new recipes are already in the DB).**
+>
+>
 > **Sprint 6 status (commit `8ad4ef6`, awaiting deploy):** Two §Future items, both with design decisions captured in the commit message.
 > - **F3** Bulk 'add checked to pantry' on ShoppingList. Backend `POST /api/pantry/bulk` accepts `{items: HomePantryCreate[]}` and returns per-item status (`added` / `updated` / `skipped`) with totals. Per-item failure model: unknown ingredient → `skipped` with reason, not a 4xx. Frontend ShoppingList gains a primary `Add N to pantry` button next to the existing Reset button; toast reports `added X, updated Y, skipped Z`; only the items that actually landed are removed from the checked Set. **Scope decision:** ShoppingList only (the checked Set was the natural substrate; Pantry would need new multi-select UI).
 > - **F4** Plan the whole week on Dashboard. Backend `POST /api/meals/{id}/fill-empty-slots` with body `{meal_types: [str, ...]}` returns `FillEmptySlotsResult { filled: [{day, meal_type, item}], failed: [{day, meal_type, reason}] }`. Iterates day 1..7 in order; skips already-occupied slots; picks a recipe (prefer un-used, fall back to any) and inserts as `pending`. Per-slot failure model — never aborts mid-batch. Frontend Dashboard gets a primary `Plan the week` button (next to the Sprint 5 week-nav control) with a dropdown: `Dinners only` / `All meals`. Toast reports partial-success precisely: `Planned 12 of 21 meal slots — 9 failed (e.g. <reason>)`.