allow anon mutations for logged in users, generally don't create snippet unless save button is pressed, various fixes, refactor for reuse, playwright snapshot testing, loading/404 pages

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1 Skipped Deployment

| Name | Status | Preview | Updated (UTC) | | :--- | :----- | :------ | :------ | | **snippets** | ⬜️ Ignored ([Inspect](https://vercel.com/tscircuit/snippets/5UNgVvN53qMfu2cyYMhVLrM6MoXm)) | [Visit Preview](https://snippets-git-anon-snips-tscircuit.vercel.app) | Oct 14, 2024 3:32am |

[seveibar]

update snapshots