Adobe Express

Build me a social graphics generator to replace Adobe Express. Requirements: - A local web app: Node + Express, templates are plain HTML/CSS files in templates/, rendered to PNG by a headless Playwright screenshot at exact pixel sizes. No frontend framework. - Ship 5 starter templates: Instagram square 1080x1080, story 1080x1920, X post 1600x900, YouTube thumbnail 1280x720, and a quote card. - The page shows a template picker, one input per text field, an image drop zone, and an accent color picker, with a live preview iframe rendering the same template HTML. - Background removal for uploaded photos via rembg running locally, no paid key needed. - Brand lives in brand.json: two font files in fonts/, 4 hex colors, a logo path; every template reads from it. - Exports save to ~/Graphics/YYYY-MM-DD-<slug>.png plus a JSON sidecar of the field values so any graphic can be re-rendered later. - Localhost only, no accounts, no telemetry, my photos never leave the machine. - Out of scope: video, PDFs, and stock assets. Adobe's licensed library is the product, I bring my own images. - README: setup, installing rembg, and how to add a new template.