No user-facing change. Eight of the largest source files split along their natural seams into focused modules, every move verbatim with stable import paths: - mood analytics calculators (mood-tag-influence / mood-crosstab / mood-better-days / mood-patterns; hub 2229 → 770 lines) - insight status-invalidation machinery (status-invalidation.ts) - feature extraction (feature-blocks / signals-of-day) - doctor report types + pure helpers (doctor-report-types / doctor-report-helpers; collector 1756 → 1002) - Google Health mapping layer (mappers.ts; client 2153 → 1022, acyclic client → mappers with type-only back-imports) - coach chat bubbles + read-aloud controls (chat-bubble / read-aloud; message-thread 1713 → 464) - Telegram webhook handlers to lib (route 1307 → 92 — handler thin, logic in lib; rate-limit-before-secret ordering byte-identical) - coach snapshot cache, series helpers and the four largest per-metric blocks (snapshot-cache / snapshot-series / snapshot-blocks; 2691 → 1896) The glucose-panel-window structural test follows the moved alias; two unused imports left by the feature split are removed.
src/components/
React components. The UI primitives are shadcn/ui (new-york style, zinc base) over Radix + Tailwind 4 + Lucide; everything above the primitives is feature-grouped by surface. Components are server components unless they need a hook, state, or browser API, in which case they open with "use client". Charts use Recharts 3 — replacing the chart library requires explicit approval.
Primitives and shell
ui/— shadcn/ui primitives (button, dialog, sheet, table, …). Generated by the shadcn CLI; keep edits minimal and on-style.layout/— the app shell: sidebar, topbar, bottom nav.providers.tsx,version-poller.tsx— top-level context providers and the self-healing stale-shell poller.i18n/— translation context + locale switcher.
Feature groups
insights/— insight status, assessment cards, Coach surface, advisor cards (the largest group).medications/— medication cards, the schedule wizard, intake timeline, detail history.settings/— the section components behind each settings page.measurements/,mood/,dashboard/— entry forms, lists, dashboard tiles.charts/— Recharts wrappers.monitoring/— Umami / GlitchTip client bootstrap.gamification/,targets/,comparison/,doctor-report/,clinician/,onboarding/,admin/— the remaining per-surface groups.
Conventions
Kebab-case filenames; React component exports stay PascalCase regardless. (A handful of PascalCase-filename outliers under medications/ + onboarding/ are pre-existing drift, noted in ../../CLAUDE.md.) Every t() call needs a matching key in messages/en.json — guarded by i18n-call-site-coverage.test.ts. Data reads go through TanStack Query with keys from @/lib/query-keys and unwrap (await res.json()).data. Tests live in __tests__/.