Splits testing into five layers so a failure points at the responsible one:
- tests/unit isolated utility, repository and service tests
- tests/data validates the tracked Pokémon, game, region and dex files
- tests/integration schema, views, constraints, RLS and repositories
- tests/bdd executable Gherkin for user-visible behaviour
- tests/build service worker and manifest artifacts per build variant
Replaces the two Playwright specs in client-test/ and the two Vitest files in
test/. Adds a GitHub Actions workflow running the layers as separate jobs, a
mock OAuth provider server so the Drive and Dropbox scenarios never touch real
accounts, and a wrapper that reads the local Supabase keys from
`supabase status` rather than hard-coding them.
Extracts the pure formatting helpers out of PokedexExportService so they can be
unit tested, and makes the provider endpoints configurable so the mock server
can stand in for Google and Dropbox.
`prettier --check .` failed on 22 files, so gating CI on `npm run lint` was
never going to pass. These changes are whitespace only.
Adds the two remaining generated data exports to .prettierignore so this class
of churn cannot recur, along with machine-local settings files.
Josh Creek