This release adds image upload to the article editor and fixes several rough edges from v2.0.0-beta.

## New

**Image upload in the article editor**
- The editor's Image toolbar button, or dropping a file onto the editor, opens an upload dialog.
- Choose or drop a PNG, JPEG, WEBP or SVG file up to 10 MB. Progress is shown live, and the image is inserted at the cursor as soon as it is uploaded.
- Invalid files (wrong type or too large) are rejected in the browser before anything is sent. The same wording is reused if the server rejects a file the browser let through.
- A failed upload leaves the article untouched and offers a retry.

## Improvements and fixes
- Uploaded images now render in the editor and the article body. The dev server proxy was missing a route for the endpoint that serves them.
- Clicking a row in the article list now opens the editor. The row-click handler was reading the wrong argument.
- The article details panel's copy URL control now copies the link and confirms with a toast.
- The user menu's dropdown trigger no longer misrenders when the sidebar is collapsed.
- The sidebar's collapsed or expanded state is remembered across reloads.
- Smaller styling and layout fixes in the article details panel, editor toolbar and new-article dialog.

## Upgrading
- Replace the binary and restart.