feat(studio): deep-link folders and files in the storage explorer (#50413)

| | PR | Base | Branch |
| --- | --- | --- | --- |
| 1 | #50476 | `master` | pre-existing correctness fixes |
| 2 | **this PR** | `fix/storage-explorer-listing-and-scroll` |
`?path`/`?preview` deep-linking |
| 3 | #50478 | `feat/storage-nav-improvement` | end-to-end deep-link
test |
| 4 | #50480 | `test/storage-deep-link-e2e` | copy path / copy link row
actions |

## What is the current behavior?
The file explorer doesn't keep track of folder navigation.
Files and folders paths aren't shareable

## What is the new behavior?
With this PR:
- nav state is stored via params
  - "path" to store folder path (if nested folder paths)
  - "preview" to store the selected filename
- back/forward nav history
- file url opens correct folder/file


[https://github.com/user-attachments/assets/](https://github.com/user-attachments/assets/528d5c1d-a1b9-4061-9b67-a41dd98716e0)[0cfb7fcc-2c6e](https://github.com/user-attachments/assets/0cfb7fcc-2c6e-4f5a-950d-060c8eb2027b)[528d5c1d-a1b9](https://github.com/user-attachments/assets/528d5c1d-a1b9-4061-9b67-a41dd98716e0)[-](https://github.com/user-attachments/assets/528d5c1d-a1b9-4061-9b67-a41dd98716e0)[4f5a-950d](https://github.com/user-attachments/assets/0cfb7fcc-2c6e-4f5a-950d-060c8eb2027b)[4061-9b67](https://github.com/user-attachments/assets/528d5c1d-a1b9-4061-9b67-a41dd98716e0)[-](https://github.com/user-attachments/assets/528d5c1d-a1b9-4061-9b67-a41dd98716e0)[060c8eb2027b](https://github.com/user-attachments/assets/0cfb7fcc-2c6e-4f5a-950d-060c8eb2027b)[a41dd98716e0](https://github.com/user-attachments/assets/528d5c1d-a1b9-4061-9b67-a41dd98716e0)

## Steps to review
- Open bucket in Storage File Explorer
- navigate between files and folders and notice url params change
- reload page, it should reopen where you left off
- hitting back/forward on the browser history should follow file/folder
navigation history

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Gildas Garcia <1122076+djhi@users.noreply.github.com>

e2e/studio/utils/storage-helpers.ts

@@ -176,7 +176,9 @@ export const uploadFile = async (page: Page, filePath: string, fileName: string)
   const fileInput = page.locator('input[type="file"]')
   await fileInput.setInputFiles(filePath)
 
-  await expect(page.getByRole('status')).not.toBeVisible()
+  // Wait out the upload progress toast. Scoped to the toast itself — a page-wide
+  // `getByRole('status')` also matches any live region the explorer renders.
+  await expect(page.locator('[data-sonner-toast]')).not.toBeVisible()
   // Verify file appears in the explorer by title
   await expect(
     page.getByTitle(fileName),