fix: validate resolver address before setting snapshot text record

[ChaituVR]

Summary

• Gets and validated ENS resolver before settings snapshot text record

How to test

1. Go to http://127.0.0.1:8080/#/s:odos.eth/settings/controller
2. Login with resolver address 0x47E2D28169738039755586743E2dfCF3bd643f86 using Safe's wallet connect

3. Change controller to some other address in space settings
4. Transaction on safe should display new resolver address

Before	After

Copilot reviewed 1 out of 1 changed files in this pull request and generated no comments.

Comments suppressed due to low confidence (1)

apps/ui/src/helpers/ens.ts:121

• [nitpick] The error message 'Unsupported resolver' is unclear. Consider changing it to 'The resolver address is not supported. Please use a valid resolver address.'

throw new Error('Unsupported resolver');

[bonustrack]

utACK