URL routing doesn't canonicalize //, rendering 404 for new tab buttons in client

[nc7s]

That's actually two problems:

• Your backend routing doesn't canonicalize //, so //games isn't canonicalized to and recognized as /games, which should be.
• The base URL constant has a slash, while added components have one too.

  • itch/src/common/constants/urls.ts

    Lines 1 to 2 in 102011c

    	const originalItchio = "https://itch.io/";
    	const itchio = process.env.WHEN_IN_ROME || originalItchio;

  • itch/src/renderer/pages/BrowserPage/newTabItems.ts

    Lines 33 to 35 in 102011c

    	label: ["new_tab.random"],
    	icon: "shuffle",
    	url: urls.itchio + "/randomizer",

[3ter]

This seems like a valid improvement. Perhaps a good first issue.