https://vitejs.dev/ for packaging - I got really grumpy when frontend stuff started needing build and packaging tools, but it's the nature of things so you just have to deal with it, and vite is fast, not overly complicated, and supports fast hot reloading.
Our front end devs were drawing diagrams of react components with arrows everywhere. All the app is doing are some fairly basic forms with a bit of validation. NPM install to get the thing running on a development machine, and it seems to download half of the internet. What an absolute shitshow "full stack" development is these days.
Unless I'm misunderstanding you, Svelte can absolutely be published statically. If you leverage SvelteKit and the SSR it offers, then yes you need to deploy a server, but regular Svelte builds a statically deployable bundle just like React, Vue, or any other big UI lib/framework
For layout, don't use any CSS framework, but instead refer to https://css-tricks.com/snippets/css/a-guide-to-flexbox/ often - every time I use some big CSS framework I end up fighting it at some point.
https://vitejs.dev/ for packaging - I got really grumpy when frontend stuff started needing build and packaging tools, but it's the nature of things so you just have to deal with it, and vite is fast, not overly complicated, and supports fast hot reloading.