Initial Claude implementation

CLAUDE.md

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+# CLAUDE.md
+
+Guidance for working in this repo. Read alongside `README.md` (user-facing setup).
+
+## What this is
+
+A FastAPI skeleton serving **both** a JSON API (`/api/*`) and server-rendered
+HTML via **Jinja2 + HTMX** (`/`, `/admin/*`). Async SQLAlchemy 2.0 ORM, JWT auth
+with refresh-token revocation, and RBAC (users → roles → permissions).
+
+## Commands
+
+```bash
+uv sync --extra dev                    # install (incl. dev tools)
+uv run python -m scripts.seed          # seed perms/roles/superuser (idempotent)
+uv run uvicorn app.main:app --reload   # dev server on :8000
+uv run pytest                          # tests (in-memory SQLite)
+uv run ruff check . [--fix]            # lint
+uv run alembic upgrade head            # apply migrations
+uv run alembic revision --autogenerate -m "msg"   # new migration after model changes
+docker compose up --build              # app + Postgres, auto-seeded
+```
+
+## Architecture / layering
+
+Request → router (`app/api/` JSON or `app/web/` HTML) → `app/crud/` (data access)
+→ `app/models/`. Schemas in `app/schemas/`, cross-cutting DI in `app/deps.py`,
+token logic in `app/services/auth.py`. Keep route handlers thin; put DB logic in
+`crud/`, not in routers.
+
+## Conventions that matter
+
+- **Everything async.** Engine, sessions, CRUD, routes, tests. Use `await`; never
+  add a sync DB call. `get_db` (in `app/core/database.py`) yields the request session.
+- **Relationships use `lazy="selectin"`** (`User.roles`, `Role.permissions`) so
+  attributes are safe to read after the session closes — required under async.
+  Preserve this when adding relationships that templates/schemas read.
+- **Config** is `app/core/config.py` (`pydantic-settings`). Add new settings there;
+  they're auto-read from env vars (uppercased field name) or `.env`. Env wins.
+- **RBAC**: guard API routes with `Depends(require_permission("resource:action"))`;
+  guard web routes with `web_require(...)` in `app/web/admin.py`. Superusers bypass
+  all checks (`User.is_superuser` / `User.has_permission`). Add new permission
+  strings to `scripts/seed.py`'s `PERMISSIONS`/`ROLES`.
+- **Auth, two transports**: API uses `Authorization: Bearer`; the HTMX UI uses an
+  httpOnly cookie (`settings.cookie_name`). `app/deps.py` reads both. Web auth
+  failures raise `NotAuthenticated`, handled in `main.py` as a redirect to `/login`.
+- **Refresh tokens** are stored server-side (hash + `jti` + `revoked`) in the
+  `refresh_tokens` table. `services/auth.rotate_refresh_token` revokes-then-reissues.
+  Note: JWT payload `exp` is a tz-aware `datetime` (PyJWT only epoch-encodes inside
+  the token) — pass it straight to the model, don't `fromtimestamp` it.
+
+## Database
+
+One `DATABASE_URL` drives SQLite (`sqlite+aiosqlite://`, the default) or Postgres
+(`postgresql+asyncpg://`). `AUTO_CREATE_TABLES=true` calls `Base.metadata.create_all`
+on startup for dev convenience; production should use Alembic instead. `init_db()`
+imports `app.models` inside the function to avoid a circular import.
+
+## Tests
+
+`tests/conftest.py` builds an in-memory SQLite engine with `StaticPool`, creates
+tables, and overrides `get_db`. Fixtures: `client` (httpx ASGI), `seeded`
+(perms+roles), `make_user`. `asyncio_mode = "auto"` — write `async def test_*`
+without decorators.
+
+## When extending
+
+Add a feature → model in `models/` (+ register in `models/__init__.py`), schema in
+`schemas/`, CRUD in `crud/`, routes in `api/` and/or `web/`, then a migration. If it
+needs access control, add the permission to the seed and guard the routes.