feat(viewer): altitude-based node LOD — hide DCs until zoomed in #7

	name: Validate & Test

	on:
	pull_request:
	branches: [main]
	push:
	branches: [main, "claude/**"]

	jobs:
	schema-validation:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: "3.11"
	cache: pip

	- name: Install deps
	run: pip install jsonschema requests python-dateutil

	- name: Validate sample GeoJSON
	run: python scripts/validate_schema.py data/samples/sample-africa.geojson -v

	- name: Validate committed data files
	run: \|
	for f in public/data/spans-.geojson public/data/nodes-.geojson; do
	[ -f "$f" ] && python scripts/validate_schema.py "$f" -v \|\| true
	done

	typescript:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: Set up Node
	uses: actions/setup-node@v4
	with:
	node-version: "20"
	cache: npm

	- name: Install deps
	run: npm ci

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

	- name: Vite build
	run: npm run build

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