fix: include admin_basepath in absolute navigation paths

[cameronapak]

Continuation of #218

Problem

`useNavigate` with `{ absolute: true }` only prepended `basepath` but not `admin_basepath` when constructing URLs. This caused links like the Data/Schema segmented control to navigate to `/data` instead of `/admin/data` when `admin_basepath` is set.

Replicate

Visit /admin/data/schema and then click on Data on the segmented button. It would take the user to /data instead of /{admin_basepath}/data

Changes

• src/ui/lib/routes.ts: Include `admin_basepath` in the absolute URL construction in `useNavigate`.
• src/ui/Admin.tsx: Add `admin_basepath` to `BkndAdminConfig` type so TypeScript recognizes it on the options object.

[jonaspm]

I noticed there is an error thrown when building bknd because of this.

[dswbx]

@jonaspm just tested the build and it runs fine, which error are you seeing?

@cameronapak is this fix relevant to the dev command (or when using as static files) or when used inside a framework?

[dswbx]

@cameronapak what problem are you solving exactly? I couldn't reproduce the issue. I've tried running it with bun run dev (which is also how it works when used statically) and also within the astro example, both with your changed added and reverted – without seeing a difference 🤔

[jonaspm]

@dswbx my bad, not an error but a type warning... huh I am unable to reproduce it on the release/0.21 branch, guess it is good signal.

[dswbx]

It is a good sign indeed 😃

[cameronapak]

@cameronapak what problem are you solving exactly? I couldn't reproduce the issue. I've tried running it with bun run dev (which is also how it works when used statically) and also within the astro example, both with your changed added and reverted – without seeing a difference 🤔

I can see you have some confusion and I hope to help clear things up. Watch this video of me replicating this big in v0.21.0-rc.1 of bknd in Freedom Stack v3

CleanShot.2026-03-28.at.05.50.00.mp4

I'm also unfortunately running into this bug again with Admin UI routes not retaining the admin basepath:

CleanShot.2026-03-28.at.05.52.31.mp4

[jonaspm]

@dswbx wild type error appeared:

Property 'admin_basepath' does not exist on type '{ basepath: string; logo_return_path: string; theme?: "system" | "dark" | "light" | undefined; entities?: BkndAdminEntitiesOptions | undefined; appShell?: BkndAdminAppShellOptions | undefined; }'.

[dswbx]

Yeah noticed that one too, fixed that in the upstream release/0.21 branch

[cameronapak]

Yeah noticed that one too, fixed that in the upstream release/0.21 branch

Does that mean this PR can/should be closed? If so, please do close it