auto capitalization/correct issues on login

[dozro]

Describe the bug

When I try to login it confronts me with multiple, related problems.
For once when I remove the server name (on iOS), it will always start with a capitalized letter. and secondly it will use autocorrect and by that potentially mess up the entered homeserver address.

Reproduction

1. go to app.cinny.in
2. try to login with a homeserver name, for example itsrye.dev

Expected behavior

Like the fixed version in sable (disabled autocorrect and spell check):

Platform and versions

1. OS: iOS 26.2 (simulated) on iPhone 16e
2. Safari
3. Cinny v4.10.5 (app.cinny.in)
4. homeserver (besides its address ig) irrelevant for the experienced bug

Additional context

(btw fixed in a fork):

1. fix autocorrect/spellcheck issue on login page 7w1/sable#199 (spell check, auto-correct on homeserver name)
2. fix automatic capitalization in login screen 7w1/sable#131 (automatic capitalization)