supabase / supabase / 26405780292

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github

chore: migrate realtime `Modal` to `Dialog` (#46284)

## Problem

Realtime still uses the deprecated `Modal` for:
- sending a message

## Solution

- use `Dialog` instead
- Fix `ChooseChannelPopover`

## Screenshots
Before:
<img width="379" height="289" alt="image"
src="https://github.com/user-attachments/assets/d0389aef-e00e-463d-b994-3ef495ff2baa"
/>

After:
<img width="340" height="289" alt="image"
src="https://github.com/user-attachments/assets/75e5d982-6f26-4e92-beea-dcc136a75bd1"
/>

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Refactor**
* Message-sending modal redesigned to use a dialog layout with a clear
header, body and footer; confirm/cancel actions and inline JSON
validation behave as before.
* Channel-join form updated to a compact grouped input-and-button layout
for more consistent, space-efficient entry.

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<!-- end of auto-generated comment: release notes by coderabbit.ai -->

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