feat: Go rewrite M1 — skeleton, tooling, and hello server

Stand up the Go project alongside the Python backend so both run
independently during migration. `make web-go` builds and serves on :8080;
`make web-py` (alias: `make web`) keeps the Python side on :5001.

- go/: new module `fuj-management/go` (Go 1.26)
  - cmd/fuj: stdlib-flag dispatcher; `server` + `version` work,
    fees/reconcile/sync/infer stubbed for M2/M4
  - internal/config: env loader mirroring scripts/config.py
  - internal/logging: slog setup, level taken from config
  - internal/web: net/http ServeMux + request-timer middleware
  - build/Dockerfile: golang:1.26 → alpine:3 multi-stage image
  - .golangci.yml: govet, staticcheck, errcheck, gofumpt, unused
- Makefile: web→web-py alias; go-build/go-test/go-run/go-lint/web-go
- CI: parallel build-go job in .gitea/workflows/build.yaml (<tag>-go image)
- docs/plans/: M1 kickoff plan + progress tracker (M1 complete)
- .claude/settings.json: gofumpt + golangci-lint permissions

Gate: make go-build ✓  make go-lint ✓  make go-test ✓  curl :8080 ✓

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
2026-05-04 12:05:46 +02:00
parent 5a41cdae83
commit cf0f176d3f
18 changed files with 1247 additions and 10 deletions

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# Changelog
## 2026-05-04 12:02 CEST — Go rewrite M1: skeleton + tooling
- Created `go/` tree with module `fuj-management/go` (Go 1.26).
- `cmd/fuj`: stdlib-flag subcommand dispatcher; `server` and `version` implemented, stubs for M2/M4 commands.
- `internal/config`: env loader mirroring `scripts/config.py` (same env var names and defaults).
- `internal/logging`: slog setup accepting log level from config.
- `internal/web`: `net/http` ServeMux on `:8080`; `middleware/timer.go` logs method/path/status/ms.
- `go/build/Dockerfile`: multi-stage (`golang:1.26``alpine:3`) producing a static binary image.
- Makefile: `web``web-py` alias; added `web-go`, `go-build`, `go-test`, `go-run`, `go-lint`.
- `.gitea/workflows/build.yaml`: parallel `build-go` job pushing `<tag>-go` image.
- Gate: `make go-build`, `make go-lint`, `make go-test`, `curl :8080` all pass.
## 2026-05-03 20:37 CEST — Fix Balance column to correctly reflect past-month debt
- Balance (and Pay-All) are now computed as `sum(paid expected)` over past months only, iterating directly over the ledger entries from `reconcile()`.