SSR: reactive values inside labeled statements are not transformed

Describe the bug

Reactive values referenced inside a labeled statement are not transformed during SSR.

Svelte Code

  <script>
        let value = $derived(false);
        let result = "correct";

        label: if (value) result = "wrong";
  </script>

  <p>{result}</p>

SSR compiled code

import 'svelte/internal/flags/async';
import * as $ from 'svelte/internal/server';

export default function App($$renderer) {
	let value = $.derived(() => false);
	let result = "correct";

	label: if (value) result = "wrong";

	$$renderer.push(`<p>${$.escape(result)}</p>`);
}

The client compiler correctly unwraps the derived value:

label: if ($.get(value)) result = 'wrong';

The server compiler does not:

label: if (value) result = 'wrong';

Because $.derived() returns a function on the server, value is always truthy. As a result, SSR renders wrong while CSR renders correct.

@MathiasWP and I found this issue while implementing rsvelte.

https://github.com/baseballyama/rsvelte/pull/2269

Reproduction

https://svelte.dev/playground/untitled?version=5.56.8#H4sIAAAAAAAAE22OzarCQAyFXyUc7kKh3O7HWrgPcVfWxdimMhCnw0xaldJ3l9YfFMwuX74TzghvTwyDf69OhRtkaJ1wgtmN0GuYbzNA9jT_QvhNA4vO7GATf-N155W9JhgQFamOLmhZeXqMsNJgpWfa0k_D0Q3crForidebTyty6kVpSxXqLkautcKm8m-SPbAYci2tlo_r98g5dv64BIiK_FVjWUM53s2pyEOJDMoXhdHY87TPoNbJ2fkGZuk13QAVd1cCKgEAAA

Logs

System Info

System:
    OS: macOS 26.6
    CPU: (12) arm64 Apple M4 Pro
    Memory: 112.27 MB / 48.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 24.13.1 - /Users/baseballyama/.nodenv/versions/24.13.1/bin/node
    npm: 11.8.0 - /Users/baseballyama/.nodenv/versions/24.13.1/bin/npm
    pnpm: 11.20.0 - /Users/baseballyama/.nodenv/versions/24.13.1/bin/pnpm
    bun: 1.3.11 - /opt/homebrew/bin/bun
    Deno: 2.5.6 - /opt/homebrew/bin/deno

Severity

annoyance