docs: refresh README opening paragraph (cinematic intro framing) #6

	name: CI

	# PR validation: catch broken frontend builds and Python syntax errors before
	# they reach main. Deliberately lightweight — no pip install of the full
	# runtime deps (slow, network-flaky); compileall catches syntax/import-shape
	# breakage, the npm build catches the rest.
	on:
	push:
	branches: [main]
	pull_request:
	workflow_dispatch:

	env:
	# GitHub forces Node 24 for JS actions from 2026-06-16; opt in now so the
	# switch is validated on our schedule. Safe to delete after 2026-09-16.
	FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true

	jobs:
	frontend-build:
	runs-on: ubuntu-latest
	defaults:
	run:
	working-directory: NeXroll/frontend
	steps:
	- uses: actions/checkout@v5
	- uses: actions/setup-node@v5
	with:
	node-version: 20
	cache: npm
	cache-dependency-path: NeXroll/frontend/package-lock.json
	- run: npm ci
	# CI=false: CRA treats warnings as errors under CI=true; we gate on real
	# build failures only (matches the local build command).
	- run: CI=false npm run build

	backend-syntax:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v5
	- uses: actions/setup-python@v6
	with:
	python-version: "3.12"
	- name: Compile all backend sources
	run: python -m compileall -q NeXroll/backend NeXroll/version.py NeXroll/scripts

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