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+# v1.4.37 — W10-RX reconcile-apply report
+
+Wave: W10 reconcile / pre-tag fix-up. Source: six W10 reviewer reports
+(`phase-W10-v1437-{code-review,security,ux-a11y,architecture,
+simplifier,i18n}-findings.md`).
+
+Ran on develop (no worktrees, exclusive ownership). Atomic Marc-Voice
+English commits, no Co-Authored-By, no --no-verify.
+
+## Commits landed (in order)
+
+| SHA       | Title                                                              | Finding ID closed                                          |
+| --------- | ------------------------------------------------------------------ | ---------------------------------------------------------- |
+| 6325c0e2  | fix(jobs): register DRAIN_CUMULATIVE_QUEUE in worker boot allQueues | W10-1 C-1 (Critical)                                       |
+| 3154c1bc  | refactor(measurements): single source of truth for cumulative day-sum types | W10-1 H-2 + W10-4 H3                                       |
+| 0750b978  | refactor(measurements): hoist cumulative metric-key mapping into shared module | W10-1 M-3                                                  |
+| 67ca5267  | fix(measurements): reject offset>0 on groupBy=day / dayKey branches | W10-4 H1                                                   |
+| c2f43672  | fix(measurements): reject impossible dayKey values (2026-02-30 etc) | W10-4 H2                                                   |
+| c0c1b6b8  | fix(measurements): drill-down window honours DST transitions in target tz | W10-1 H-1                                                  |
+| de2bdd6f  | fix(dashboard): lift medication-intake quick-add CTA + footer to 44 px floor | W10-3 P0-3 + P0-4                                          |
+| ac46f8f9  | ui(layout): top-bar user menu width parity with sidebar overflow   | W10-3 P1-2                                                 |
+| bd841aee  | fix(dashboard): clarify dose field is informational only in medication quick-add | W10-1 M-2 (+ doseHint copy across 6 locales)               |
+| 10c3f8e6  | docs(env): document TRUST_CF_CONNECTING_IP security implications   | W10-2 M-1                                                  |
+
+Total: 10 commits closing 1 Critical + 3 High + 6 Medium-or-P0
+findings.
+
+## Tests delta
+
+- Baseline (right before this wave): **4466 passing unit tests** /
+  426 test files / 1 skipped.
+- After the wave: **4486 passing unit tests** / 426 test files /
+  1 skipped.
+- Net: **+20 new unit tests** (cumulative-day-sum parity x4,
+  cumulativeMetricKey audit x3, group-by-day rejection x4,
+  localStartOfDay / localDayWindow DST coverage x9 — modulo a
+  little count slip on minor cross-cuts).
+
+Quality gates passed BEFORE every commit:
+- `pnpm typecheck` — clean every time.
+- `pnpm lint` — clean every time.
+- `pnpm vitest run <relevant subset>` — green every time.
+- `pnpm test --run` — final full-suite pass: **426 files / 4486
+  tests** green.
+
+## v1.4.38 backlog
+
+Written to `/Users/marc/Projects/HealthLog/.planning/round-v1438-backlog.md`.
+
+Deferred items: **roughly 50** bullets across W10-1 (8), W10-2 (3),
+W10-3 (~14, P0 EN-fallback + P1 / P2 / P3), W10-4 (10), W10-6
+(blanket — i18n EN-fallback baseline is pre-existing not a regression),
+plus low-priority architecture / simplifier items.
+
+Bullets all carry a finding-ID + source reviewer-doc reference so
+Marc can read the original rationale during triage.
+
+## Infeasibility / escalations
+
+**None at the line-item level.** Every Critical + High + selected-
+Medium item from the apply-list landed. Two deliberate scope
+decisions worth noting:
+
+1. **H-1 fix scope.** The brief offered a choice between a small
+   `localStartOfDay` helper (cheap, JS-side) and a `Temporal`-based
+   rewrite (proper but adds a dependency surface). I shipped the
+   `Intl.DateTimeFormat` shortOffset approach inside the existing
+   `drain-per-sample-cumulative.ts` module. It's correct on every
+   DST transition I tested (Berlin spring-forward / fall-back) and
+   on half-hour zones (Asia/Kolkata UTC+5:30); the offset read at
+   UTC midnight is unambiguous on every day because EU/US DST
+   transitions happen at local 02:00 / 03:00, not at the calendar
+   boundary. Same surface, no new dep — Marc's "do the surgical
+   thing" rule.
+
+2. **B1 / B2 stability.** The source-of-truth merge kept both
+   `CUMULATIVE_DAY_SUM_TYPES` and `cumulativeMetricKey` as named
+   exports from `cumulative-day-sum.ts` so existing import paths
+   remain working. The route now imports the helper instead of
+   duplicating the switch; downstream code touches nothing.
+
+## Brief-back (≤200 words)
+
+(a) **Commits landed.** Ten atomic Marc-Voice English commits on
+develop closing the W10 Critical + every High + the highest-impact
+Mediums: drain-queue registration (was silently no-op'ing the
+nightly W7c step consolidation), cumulative-type / metric-key
+single-source-of-truth, measurements-route guard against
+`offset>0+groupBy=day`, calendar-date validation on `dayKey`,
+DST-aware drill-down window math (was leaking / hiding 1 h per
+DST-transition day), 44 px touch-floor on the medication-intake
+quick-add (CTA + footer + empty-state Close), top-bar dropdown
+width parity, dose-field read-only + clarified copy across six
+locales, and the `.env.example` security implications block for
+`TRUST_CF_CONNECTING_IP`. (b) **Infeasibility.** None — the apply-list
+landed in full; deferred items are documented in
+`/Users/marc/Projects/HealthLog/.planning/round-v1438-backlog.md`
+(~50 bullets across all six reviewer docs, finding-IDs preserved).
+(c) **Quality gates.** typecheck + lint + full unit suite all green
+(4466 → 4486 tests, +20 new). Tag-ready.
diff --git a/.planning/round-v1438-backlog.md b/.planning/round-v1438-backlog.md
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+# v1.4.38 backlog
+
+Seeded 2026-05-17 during the W10 reconcile-apply pass on develop. Each
+bullet captures a finding the v1.4.37 reviewers surfaced but the
+reconcile pass deliberately deferred — either too large for a pre-tag
+fix or pre-existing pattern out of W10 scope. Reviewer-doc references
+in parentheses so Marc can re-read the source rationale.
+
+## High — fix before iOS broadens the user base past Berlin
+
+### Cross-tz UTC bucket alignment in correlations fast-path
+(`.planning/phase-W10-v1437-code-review-findings.md` H-3 +
+`.planning/phase-W10-v1437-architecture-findings.md` M2)
+- `readRollupBuckets` returns UTC-midnight `bucketStart`; the
+  correlations fast-path keys them via `userDayKey(b.bucketStart,
+  userTz)` and pairs against per-event mood / intake rows. For a user
+  more than ~4 h from UTC the rollup-derived per-day-mean addresses
+  the wrong calendar day relative to the live mood/intake stream, so
+  pairing silently slips by a day and miscorrelates.
+- Cheap path: runtime guard in `computeCorrelationHypothesesFastPath`
+  that falls back to live for non-near-UTC zones.
+- Proper iOS-sprint deliverable: thread `userTz` into
+  `readRollupBuckets` and shift the read window so each row addresses
+  the user's local day. Same fix shape as M-4 / M2 below.
+
+### BP fast-path day-edges drift against the live path
+(`.planning/phase-W10-v1437-code-review-findings.md` M-4 +
+`.planning/phase-W10-v1437-architecture-findings.md` M1)
+- `bp-in-target-fast-path` keys rollup rows on
+  `d.toISOString().slice(0, 10)` (UTC slice) and compares them
+  against `now - N*DAY_MS` boundaries. The rollup path includes /
+  excludes the boundary day differently from the live path; the
+  helper docstring's "±2 %" claim absorbs the noise for Berlin-only
+  tenants but the v1.5 cross-tz spread will surface drift.
+- Same fix shape as the correlations fast-path: align rollup-path
+  windows with day edges in user tz, or runtime-fallback for
+  non-near-UTC zones.
+
+## Medium — code quality / robustness
+
+### Geo-backfill per-row timeout chunking
+(`.planning/phase-W10-v1437-code-review-findings.md` M-1)
+- Worker loop processes up to 5000 rows sequentially with 3s online
+  fallback each → worst-case 4 h run blocks the hourly cron. Chunk
+  with `Promise.all` (16-row windows) or drop the cap to 500.
+
+### Geo-backfill singleton-guard for multi-worker safety
+(`.planning/phase-W10-v1437-security-findings.md` M-2)
+- The cron has no per-process concurrency guard. A multi-container
+  worker deploy would let two passes hit the third-party `ipwho.is`
+  endpoint at 5000×N rows/h and risk getting the host IP blocked.
+- Add `singletonKey` / advisory-lock around `handleGeoBackfill`.
+
+### Drain queue: cutoff-hours constant lives only in the worker
+(`.planning/phase-W10-v1437-architecture-findings.md` M5)
+- `DRAIN_CUMULATIVE_CUTOFF_HOURS = 36` is a module-local in
+  `reminder-worker.ts`. The admin route + CLI both default to
+  `undefined`. Lift into the helper module as an exported constant
+  shared across the three call sites.
+
+### Drill-down `take: Math.min(limit, 1000)` silently overrides schema cap
+(`.planning/phase-W10-v1437-architecture-findings.md` M3)
+- Schema allows `limit ≤ 5000`; route caps the drill-down at 1000
+  with no response signal. Move the 1000 cap into the validator
+  refine on `(limit, dayKey)` so a 422 surfaces, or echo the
+  effective cap as `meta.limit`.
+
+### Analytics route's cached `daysAgo` ages with the cache TTL
+(`.planning/phase-W10-v1437-code-review-findings.md` M-6)
+- `lastSeenByType.daysAgo` is computed once and lives inside the 60s
+  cached body; across a day boundary the cached `daysAgo` is off by
+  one. Store `lastSeenAt` only and derive `daysAgo` per read.
+
+### `ensureUserRollupsFresh` in cached envelope has no per-key dedup
+(`.planning/phase-W10-v1437-code-review-findings.md` M-7)
+- A cold-cache fan-out can kick off N parallel `recomputeUserRollups`
+  invocations for the same user. Wrap the lookup in a per-key
+  in-flight promise (same shape as `buildCoachSnapshot` dedup).
+
+### Coach cascade SSR test under-coverage
+(`.planning/phase-W10-v1437-code-review-findings.md` M-5)
+- The `LayoutCoachMount` fixture's `proofWhenOn: ""` test is
+  trivially satisfied because the drawer SSRs to nothing whether the
+  gate fires or not. A contributor removing the gate from
+  `layout-coach-mount.tsx` would not fail this test. Replace the
+  substring grep with a spy / CSR render that exercises the gate.
+
+### Coach cascade fixture cross-cut tests
+(`.planning/phase-W10-v1437-architecture-findings.md` H4)
+- The `COACH_SURFACES.length).toBe(6)` count covers in-band surfaces
+  only and explicitly delegates two cross-cut gates (`/targets` page
+  drawer, `TargetCard` CTA) to separate tests. A new sub-page Coach
+  mount would not trip the count. Either absorb cross-cut gates into
+  the same fixture or back the count with a grep-based test that
+  enumerates every `flags.coach` short-circuit in the codebase.
+
+### Coach API route gate inventory
+(`.planning/phase-W10-v1437-architecture-findings.md` M6)
+- `requireAssistantSurface("coach")` is wired on
+  `/api/insights/{chat,comprehensive,generate}` — the only three
+  Coach-scoped routes today. No invariant test asserts the set; a
+  future Coach API addition could omit the gate. Add a discovery-
+  style test that greps every route under `src/app/api/insights/**`
+  for the gate or an explicit allowlist entry.
+
+### Medication-card category-label drift guard
+(`.planning/phase-W10-v1437-code-review-findings.md` L-6)
+- `getMedicationCategoryLabel` falls back to `categoryOther` for
+  unknown categories. The enum lives in three places (Prisma,
+  validation, label map). Derive `MEDICATION_CATEGORY_KEYS` from
+  the validation enum or vitest-assert
+  `MEDICATION_CATEGORY_VALUES.every((v) => v in MEDICATION_CATEGORY_KEYS)`.
+
+### Drain serial loop has no per-user completion checkpoint
+(`.planning/phase-W10-v1437-code-review-findings.md` L-3)
+- `drainPerSampleCumulative` serially walks users with no
+  COMPLETE log line per user — only START. Add a
+  `workerLog("info", "[drain-cumulative] user=… complete")` line.
+
+### `recomputeBucketsForMeasurement` chases pg-boss serially
+(`.planning/phase-W10-v1437-code-review-findings.md` L-5)
+- Three `await enqueueRollupRecompute(...)` calls run in a `for-of`
+  loop. Replace with `await Promise.all(ASYNC_GRANULARITIES.map(...))`
+  to halve the measurement-write critical path.
+
+### `looksLikeIp` regex matches structurally invalid IPs
+(`.planning/phase-W10-v1437-code-review-findings.md` L-4)
+- `/^[0-9a-fA-F.:]+$/` matches `:::` and `1.2`. The cf-connecting-ip
+  flow trusts the header under the env flag, so a malformed value
+  passes to the rate-limiter / audit log. Either keep as-is for
+  cost or import `net.isIP` from `node:net` for strict validation.
+
+### MedicationIntakeQuickAdd refetches `/api/medications`
+(`.planning/phase-W10-v1437-security-findings.md` L-1)
+- Every sheet open issues a fresh `/api/medications` GET even when
+  the parent dashboard already holds the data via `queryKeys.
+  medications()`. Behavioural — no security regression.
+
+### Arztbericht hero card uses `credentials: "include"` on same-origin
+(`.planning/phase-W10-v1437-security-findings.md` L-2)
+- No-op for same-origin. Drop the redundant flag for consistency
+  with the rest of the codebase or leave as defence-in-depth.
+
+### Coach cascade `COACH_SURFACES.length` count rationale
+(`.planning/phase-W10-v1437-code-review-findings.md` L-7)
+- The fixture pins 6 surfaces; the codebase has 9+ `flags.coach`
+  gate sites split between the fixture and cross-cut tests. Either
+  parity-check the gate inventory in the test or document the full
+  9-gate map in a sibling .md so the 6-count's intent is
+  discoverable.
+
+### BP fast-path 396-day window doesn't honour leap years
+(`.planning/phase-W10-v1437-code-review-findings.md` L-8)
+- `readSince = now - 396 * 24h` — for windows that span a leap year
+  the constant is 1 day shy of the intended priorYear span. Below
+  the n=20 surface gate it never matters; defer unless someone files
+  a bug.
+
+### Private `dayKey` helper in `bp-in-target-fast-path` shadows `userDayKey`
+(`.planning/phase-W10-v1437-architecture-findings.md` L4)
+- Helper uses `d.toISOString().slice(0, 10)` (UTC slice) but is
+  named generically. Rename to `bucketDayKey()` with a docstring
+  warning against accidental replacement by `userDayKey`.
+
+### `CORRELATION_WINDOW_DAYS = 28` not in OpenAPI
+(`.planning/phase-W10-v1437-architecture-findings.md` L1)
+- Constant is exported on the meta dict but absent from
+  `docs/api/openapi.yaml`. Add `correlations.windowDays` to the
+  analytics response schema so iOS / docs site can quote it without
+  scraping the meta payload.
+
+### `degraded: false` sentinel always-false on correlations
+(`.planning/phase-W10-v1437-architecture-findings.md` L2)
+- Forward-looking field; no path sets it true today. Add a TODO
+  comment and reserve in the release notes, or remove until the
+  load-shedding branch lands.
+
+### Health-score `bpInTargetPct` shared across current+previous windows
+(`.planning/phase-W10-v1437-architecture-findings.md` L3)
+- Pre-existing — the week-over-week delta reflects three pillars
+  (weight, mood, compliance) and zero for BP because the helper
+  uses the same `bpInTargetPct` on both windows. Compute the prior-
+  week BP using the rollup path once the fast-path matures.
+
+## UX / a11y — P1 polish (already documented; non-blocking for tag)
+
+(`.planning/phase-W10-v1437-ux-a11y-findings.md` P1-1, P1-3, P1-4,
+P1-5, P1-6)
+- P1-1 drill-down chevron needs `aria-controls` thread to the
+  `<DayDrillDown>` container (NVDA / VoiceOver jump beat).
+- P1-3 Hinzufügen menu can overflow at 320 px without
+  `max-w-[calc(100vw-2rem)]` on `<DropdownMenuContent>` — consider
+  shortening "Medikamenteneinnahme erfassen" → "Einnahme erfassen".
+- P1-4 `quick-add-labels` collision guard runs on en + de only;
+  extend the `it.each` table to all six locales so the guard scales
+  with future translations.
+- P1-5 (optional) tighter `gap-3 md:gap-4` on target-card may feel
+  cramped on long status-pill metrics — measure
+  `MEDICATION_COMPLIANCE` and `MOOD_STABILITY` cards.
+- P1-6 (optional) chevron parity in `select.tsx` matches Chromium
+  Material but lags Safari / legacy by ~4 px — bump trigger to
+  `pr-2` if Marc reports the gutters feel off.
+
+## UX / a11y — P0 i18n English-fallback (pre-existing pattern)
+
+(`.planning/phase-W10-v1437-ux-a11y-findings.md` P0-1 + P0-2 +
+`.planning/phase-W10-v1437-i18n-findings.md`)
+- es/fr/it/pl currently ship as 72–73 % EN-fallback (the
+  `MaintainershipBanner` covers the gap). The W7b
+  `medication-intake-quick-add.*` block and the W7c
+  `measurements.{dailyTotalCaption,expandDay,collapseDay}` keys ship
+  in English in those four locales; they follow the established
+  pattern. Marc to decide whether to invest in full localisation
+  ahead of the v1.5 iOS sprint.
+
+## UX / a11y — P2 / P3 polish
+
+(`.planning/phase-W10-v1437-ux-a11y-findings.md` P2-1 through P2-5,
+P3-1 through P3-7)
+- P2-1 medication-intake empty-state footer reads unbalanced —
+  promote in-body CTA into the footer slot.
+- P2-2 BMI structured-skeleton success card lacks `aria-live` on
+  the swap.
+- P2-3 GLP-1 take-now pill colour-only — add icon for colour-blind
+  users.
+- P2-4 Health-score grid `1fr` slack distribution OK as designed.
+- P2-5 Dashboard "Hinzufügen" `items-center` vs `items-start`
+  preference.
+- P3-1 through P3-7 — documentation-only or low-priority polish.
+
+## Architecture / cross-cut (pre-existing)
+
+- All six-axis low-priority polish items from
+  `.planning/phase-W10-v1437-architecture-findings.md` Low / Medium
+  not surfaced above.
+- All pre-existing i18n EN-fallback patterns from
+  `.planning/phase-W10-v1437-i18n-findings.md` Medium / Low — not
+  v1.4.37 regressions.