Folder structure

Routes own the screens, features own the UI and logic, the database folder owns persistence, and services own the outside world:

src/app             # gate, welcome, onboarding, five tabs, stack screens
src/features        # one folder per capability, UI plus logic
src/components      # shared interface primitives and decoration
src/database        # versioned SQLite client and repositories
src/services        # Firebase, cloud sync, reminders, notifications
src/theme           # semantic design tokens
src/utils           # date keys and the typed route table
tests/              # domain and pager suites

Config and build files live at the root: the static manifest, the dynamic config that wires Firebase values, build profiles, lint and style tooling, and the Firestore rules. See Config and tooling.

Sources: README.md, implementation.md (documented at commit 99a2c3d)