feat: phase 0 foundation — monorepo scaffold, backend, frontend, CI, docker

Establishes the skeleton every later phase builds on: Go+Gin API with
zap logging, /api/healthz, SQLite+goose runner; Vite+React18+TS strict+
Tailwind v4 frontend with bento-mono theme tokens; openapi.yaml driving
a generated TS client; oxlint with vendored anti-slop rules; GitHub CI;
multi-stage Dockerfile -> 33.6MB distroless image; docker compose up
serves the blank board.


Generated with [Devin](https://devin.ai)

Authored By: TDvorak <[email protected]>
Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

AGENTS.md

@@ -0,0 +1,37 @@
+# Dash
+
+Self-hosted homelab dashboard. Single Go binary serving an embedded React UI.
+No auth, no YAML. See `ROADMAP.md` (canonical) and `docs/specs/` for design.
+
+## Layout
+
+- `apps/frontend` — React 18 + Vite + TS strict + Tailwind v4 + shadcn/ui
+- `apps/backend` — Go + Gin + zap, CGO-free, SQLite via `modernc.org/sqlite`
+- `packages/api-client` — generated TS client; `openapi.yaml` at repo root is the contract
+- `infra/` — Dockerfile (multi-stage, one image)
+- `tools/oxlint/anti-slop` — vendored lint plugin (do not extend casually)
+- `data/` — runtime SQLite + uploaded icons (gitignored)
+
+## Commands
+
+```sh
+npm install
+npm run generate          # regenerate TS client from openapi.yaml
+npm run dev               # vite dev server (proxies /api -> :8080)
+npm run typecheck         # tsc --noEmit
+npm run lint              # oxlint + anti-slop rules
+npm run build             # api-client types + frontend bundle
+
+cd apps/backend
+go build ./...            # build backend
+go test ./...             # tests
+DASH_DEV=1 go run ./cmd/dash   # dev server on :8080, no embedded UI needed
+```
+
+## Rules
+
+- OpenAPI is the API contract. Never hand-write API types in the frontend.
+- All schema changes go through goose migrations in `apps/backend/internal/db/migrations`.
+- Board renderers share state/dnd/popover primitives; never reimplement them per renderer.
+- No emojis in code or UI.
+- Before pushing: `npm run typecheck`, `npm run lint`, `npm run build`, `go build/vet/test ./...` all green.