Minor improvements on forms setup

[edmundhung]

I was reviewing the setup and noticed a few minor issues:

• Narrowed zod refine scope for early feedback
• Fixed missing htmlFor attribute
• Simplified schema option passed to the parse helper
• Replaced all hardcoded issue code with the one exported by zod
• Fixed the status returned when checking submission intent

There are also two forms could be simplified by removing the client validation and constraint:

• Removed unnecessary constraint and client validation setup on the delete note form
• Simplify theme switcher setup by removing client validation and lookup fetcher using form action instead of a custom intent

[kentcdodds]

Thanks for this! Most of these changes are great. I have a question about some of them though. I left comments in the commits you linked. Here they are:

38cc886#commitcomment-128116470

0077095#commitcomment-128116651

If you could answer those, then we can get this merged. Thank you very much!

[kentcdodds]

I reverted those commits. If you can help me understand why they're necessary, we can add those back in later. Thanks!