Add pt-BR to the locale list and everything that hangs off it: the client loader, Intl and date-fns mapping, the reply-language footers of the Coach and insights prompts (English body, pt-BR footer, the same path Korean and Dutch take), the citation-coverage normative words, the no-key fallback copy, the AUDIT-C standard-drink line, country labels, period search, CSV yes/no cells and the Telegram bare-word aliases. The locale enums in the extract, managed-profile and record-settings schemas now derive from the locale list instead of repeating it, and the five notification and login-alert routes share one isLocale guard instead of hand-rolled chains, so a later locale is one edit there. A language tag is matched exactly and case-insensitively before its primary subtag, so pt-BR and pt-PT browsers land on the Portuguese bundle rather than English, and AUDIT-C no longer cuts a region tag to two letters. PHQ-9, GAD-7 and WHO-5 are not marked validated for pt-BR: the wording has not been read against the published Brazilian forms, so readers get the English items plus the existing note.
src/app/
The Next.js App Router tree: the page surfaces a logged-in user sees and the REST API under api/. Server components are the default; "use client" is added only where a hook, state, or browser API needs it. Routing is file-based — a page.tsx is a page, a route.ts is an API endpoint.
API routes (api/)
Every endpoint wraps its handler in apiHandler (@/lib/api-handler), parses any body with Zod safeParse, narrows userId from the session or Bearer token (never from the body), and returns the { data, error, meta? } envelope. requireAdmin() is cookie-only, so api/admin/ is unreachable by Bearer token. Notable groups:
auth/— login, register, password, passkey (WebAuthn), refresh, Codex device-OAuth.measurements/,mood-entries/,medications/,sleep/— the core health-data CRUD + batch/bulk ingest.ingest/— external Bearer-token ingest surfaces.insights/,analytics/,dashboard/— AI insights, the Coach SSE stream, trend summaries, the first-paint dashboard snapshot.withings/,whoop/,fitbit/,integrations/,sync/— OAuth connect/sync/webhook surfaces and the offline delta feed.fhir/,share-links/,doctor-report/,export/,import/— clinician-facing FHIR R4 read API, shareable records, report + data export.notifications/,devices/,send/,telegram/— channel registration, device tokens, dispatch, webhook intake.admin/— operator panel APIs (cookie-only).health/,version/,meta/,internal/— health check, build-version probe, runtime metadata, worker-internal routes.
Page surfaces
measurements/, medications/, mood/, insights/, achievements/, notifications/, settings/, onboarding/, admin/, plus the public about/, privacy/, bugreport/, the share-record route c/, and the root dashboard (page.tsx). Shared shell + chrome lives in layout.tsx; error.tsx / global-error.tsx / not-found.tsx / loading.tsx cover the framework boundaries. layout.tsx holds the one nonce-bound dangerouslySetInnerHTML (theme bootstrap).
Conventions
See ../../CLAUDE.md. The request-flow walk in .planning/codebase/arch.md annotates each layer with file:line citations. Related dirs: handlers compose ../lib/; pages render ../components/.