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Sync dev to main: CAST PRO-1 Analog In (Line In) details and announcement sliders, CAST-1 hotspot tip #341

	name: Restrict PRs to main
	on:
	pull_request:
	branches: [main]
	jobs:
	check-source:
	runs-on: ubuntu-latest
	steps:
	- name: Verify source is dev
	run: \|
	if [ "${{ github.head_ref }}" != "dev" ]; then
	echo "::error::PRs to main must come from 'dev'. Got: ${{ github.head_ref }}"
	exit 1
	fi