fix: replace lambda assignment with def to pass ruff E731 #37

	name: CI

	on:
	pull_request:
	branches: [main]
	push:
	branches: [main]

	concurrency:
	group: ci-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	# ── Backend checks ──────────────────────────────────────────────────────
	backend:
	name: Backend Lint & Type Check
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: Install uv
	uses: astral-sh/setup-uv@v4

	- name: Set up Python
	run: uv python install 3.13

	- name: Install dependencies
	run: uv sync --dev

	- name: Ruff lint
	run: uv run ruff check src/ backend/

	# ── Frontend checks ─────────────────────────────────────────────────────
	frontend:
	name: Frontend Lint & Build
	runs-on: ubuntu-latest
	defaults:
	run:
	working-directory: frontend
	steps:
	- uses: actions/checkout@v4

	- name: Setup Node.js
	uses: actions/setup-node@v4
	with:
	node-version: 20
	cache: npm
	cache-dependency-path: frontend/package-lock.json

	- name: Install dependencies
	run: npm ci

	- name: TypeScript type check
	run: npx tsc --noEmit

	- name: ESLint
	run: npm run lint \|\| echo "::warning::ESLint has pre-existing issues — not blocking CI yet"

	- name: Build
	run: npm run build

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