- Load each settings section on its own: the section route imported all twenty-one statically. A preload starts the chunk beside the record gate's read, and the loading state paints the settings card shell. /settings/[section] goes from 611 to 403 KB gz. - Take Zod out of the shell every route shares: the account-access parse run on each boot is plain TypeScript now, held to the published schema by an equivalence test over good and broken blocks. The canonical unit table moves to its own module, so the display transform no longer pulls Zod in either. Layout entry 199 to 136 KB gz; /insights 369 to 304, /medications 428 to 365, /labs 400 to 337. - Open a saved Coach conversation at its last answer: an instant jump instead of the smooth scroll that lost the end, then follow late layout (charts, tables) for a few seconds until the reader scrolls. - Show the document archive as a month grid of preview tiles, two across on a phone and three or four on a desktop, with the month headings kept. - Add the admin card for the measurement table maintenance: a status read on the maintenance route, one calm confirmation, and the run's state while it is queued, running, finished or stopped. - Re-base the bundle budget: /insights at 304, /settings/[section] watched at 403, aggregate cap 4335 with the reason written down.
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/.