Remove comments from backend and web-player source

Strip //, /* */ and XML doc comments from all backend .cs files, and
JS/TS/CSS/HTML comments from web-player source (.ts, .svelte, .css),
per the project's no-comments convention.

web-player/src/routes/api/tracks/[id]/stream/+server.ts

@@ -3,8 +3,6 @@ import { json } from '@sveltejs/kit';
 import { createApiClient, unwrapOrError } from '$lib/server/api';
 
 export const GET: RequestHandler = async ({ params, locals, fetch }) => {
-	// No hard login gate here: the API itself allows an anonymous request when
-	// AllowAnonymousListening is on, and rejects it with 401 otherwise.
 	const api = createApiClient({ fetch, accessToken: locals.accessToken ?? undefined });
 	const result = await api.GET('/tracks/{id}/stream', {
 		params: { path: { id: params.id } }