commit 6db28b23ef21ae9d06daf53cdfb15dc19f27e092
Author: Felix Kling <felix@felix-kling.de>
Date:   Fri Sep 19 15:20:23 2025 +0200

    feat: Embed user profile and settings into Svelte app (#6675)
    
    Like similar PRs, this one embeds the React user profile and settings
    pages into the Svelte app.
    
    The logic for rendering the sidenav can be found here:
    https://sourcegraph.sourcegraph.com/github.com/sourcegraph/sourcegraph@570d8454cb1522a4feb1d46e28ad5d9f686041da/-/blob/client/web/src/user/settings/sidebaritems.ts
    
    The logic for rendering the routes is here:
    -
    https://sourcegraph.sourcegraph.com/github.com/sourcegraph/sourcegraph@570d8454cb1522a4feb1d46e28ad5d9f686041da/-/blob/client/web/src/user/area/routes.tsx
    -
    https://sourcegraph.sourcegraph.com/github.com/sourcegraph/sourcegraph@570d8454cb1522a4feb1d46e28ad5d9f686041da/-/blob/client/web/src/user/settings/routes.tsx
    
    ### Additional changes
    
    - SidebarNavigation.svelte gets support for menu "groups"
    - Vendors in `@reach/dialog` to fix an issue where it would add
    `aria-hidden="true"` to the page and cause the dialog to not be visible
    to screen readers.
    - Implements the user profile page in Svelte instead of embedding React.
    Also changes the UI of the profile page (will add a screenshot in a
    bit).
    - Added testing utils for user pages
    - A lot of tests have been scaffolded by Amp and I cleaned them up. But
    I've started with this work quite a while ago and a lot of the first
    tests are maybe more verbose than they have to be. I'll do another pass
    to see if I can simplify/reduce them.
    
    TODO:
    
    - [x] `/user/*` -> `/users/:name/*` redirect
    - [x] `/settings/` -> `/users/:name/settings/*` redirect
    - [x] Fullscreen mode for token callback page
    - [x] Add legacy routes/redirects
    - [x] Add `/users/:username/batch-changes
    - [x] Add tests for all routes
    
    
    ## Test plan
    
    Manual testing