feat: sync url for huggingface embeddings (#1547)

## Description

Closes #1337

Added support for HuggingFace embedding by implementing URL parameter synchronization between parent and child windows. When the application is embedded in HuggingFace, it now emits location changes to the parent window, allowing proper URL state management.

## Related Issue and Pull requests

## Type of Change

- [x] New feature

## Checklist

- [x] I have tested this does not break current pipelines / runs functionality
- [x] I have tested the changes on staging

## Test Instructions

1. [Screen Recording 2025-12-12 at 2.08.44 PM.mov <span class="graphite__hidden">(uploaded via Graphite)</span> <img class="graphite__hidden" src="https://app.graphite.com/user-attachments/thumbnails/58ca40ef-b24d-41e4-974b-ef0bebd89380.mov" />](https://app.graphite.com/user-attachments/video/58ca40ef-b24d-41e4-974b-ef0bebd89380.mov)

    

    Go to https://huggingface.co/spaces/TangleML/tangle_test4
2. Verify that URL parameters and hash changes are properly synchronized between the parent and child windows

## Additional Comments

This implementation follows the HuggingFace documentation for handling URL parameters in embedded Spaces: https://huggingface.co/docs/hub/en/spaces-handle-url-parameters

Author: maxy-shpfy

src/routes/router.ts

@@ -124,3 +124,22 @@ export const router = createRouter({
   history,
   basepath: IS_GITHUB_PAGES ? "" : basepath, // Hash history doesn't need basepath
 });
+
+if (import.meta.env.VITE_HUGGING_FACE_AUTHORIZATION === "true") {
+  /**
+   * Sync state from the parent window to the child window in HuggingFace embedding
+   * @see https://huggingface.co/docs/hub/en/spaces-handle-url-parameters
+   * @todo: think about making this as a plugin
+   */
+  function emitLocationChange() {
+    window.parent.postMessage(
+      {
+        queryString: window.location.search,
+        hash: window.location.hash,
+      },
+      "https://huggingface.co",
+    );
+  }
+
+  router.subscribe("onRendered", emitLocationChange);
+}