one-click-review-submission - Restore feature - #10334

Created by Claude, will be reviewed by @fregante first.

Rewrites the feature as a Svelte component for the new "Finish your review" dialog, following your plan in #8711: Comment, Approve and Request changes buttons replace the native radios and submit button (hidden, not removed, since React owns them), disabled states keep their native explanation as a tooltip, and a small x restores the native controls. Buttons are ordered Comment, Request changes, Approve, and the dialog is left alone when only Comment is available. There is no <form> in the new dialog, so a click selects the matching radio and then clicks the native submit button.

Fixes #8711

Test URLs

• https://github.com/refined-github/sandbox/pull/4/files
• https://github.com/refined-github/sandbox/pull/12/files

Checked

• Selectors and structure are based on the dialog HTML you pasted from your own PR (logged in). Not seen: the dialog on a PR where Approve and Request changes are enabled, or the pending-review state with comments.
• Type-checks and builds against the repo's own tooling.

Not checked (needs a login, reviewer task)

• Nothing was run on github.com: the dialog only exists logged in, so I couldn't try the click flow, the hiding, or the x in a real browser.
• Whether selecting the radio and then clicking the native button right after one tick makes React submit the right review type. If it submits comment regardless, the delay needs adjusting.
• Whether the radios and the submit button are already rendered when the dialog appears: the observer now only waits for the dialog, so the feature would throw if they come later.
• Whether ⌘⏎ still submits the default (Comment) review through the hidden native button.
• The readme screenshot still shows the old UI.