Add unit/integration tests across backend handlers, auth, caddy and
util packages, plus frontend component and API tests with the new
test setup. Update CI workflow and Vite config to run the suites.
On version tags, build static pure-Go binaries for linux, macOS and
Windows (amd64 + arm64), package them with checksums and publish a
GitHub release with the artifacts. Grant contents: write for releases.
Replace gorm.io/driver/sqlite (mattn/go-sqlite3, CGO) with
github.com/glebarez/sqlite (modernc, pure Go). Builds and tests no
longer need a C toolchain, fixing CI on runners without gcc. Drop the
race detector from CI (it requires CGO) and build a static binary in
Docker.
Multi-stage Dockerfile builds the frontend and backend into a single
Alpine image bundling Caddy, started via an entrypoint. CI runs backend
tests (with race detector), builds the frontend and publishes the image
to GHCR on master/tags. Targets a self-hosted runner with a local build
cache. Updates .gitignore (secrets/runtime state) and README.
