Title: External Sites (navigation entries with app: "external") stopped opening on tap in 34.x — regression, works fine in 33.1.2

まず、34.1.0 のサイドナビゲーションドロワーでのタップを再現し、次に app: "external" を持つ非ネイティブエントリがどのように処理されるかを追跡して、その経路を 33.1.2 と比較します。redirect=true のエントリと redirect=false のエントリの両方がドロワーから開け、device-hidden エントリに影響しなければ完了です。

⚠️ Before posting ⚠️

• This is a bug, not a question or an enhancement.
• I've searched for similar issues and didn't find a duplicate.
• I've written a clear and descriptive title for this issue, not just "Bug" or "Crash".
• I agree to follow Nextcloud's Code of Conduct.

Steps to reproduce

1. Configure at least one entry in External Sites (nextcloud/external), either Type: Link (redirect: true) or the default embedded type (redirect: false).
2. Open the official Android app, log in, open the side navigation drawer.
3. Tap the entry.

Expected behaviour

Entry opens — works in any browser, and in Android app 33.1.2.

Actual behaviour

On 34.1.0: row highlights (ripple), then nothing. Confirmed via server logs that zero HTTP requests ever reach the target — failure is entirely client-side, pre-network. Reproduces for every entry regardless of redirect true/false, icon, or target host.
What we ruled out

• DNS/reachability — all hosts resolve publicly, work fine in browsers.
• Server bug — found and patched nextcloud/external#769 (https://github.com/nextcloud/external/issues/769) (missing 'app' => 'external' in nav registration) ourselves; no effect on 34.1.0's behaviour.
• Device targeting — device: browser-scoped entries correctly stay hidden on Android, so client detection still works.
• Clean isolation: same server/account/entries — 33.1.2 works, 34.1.0 doesn't.

Couldn't get Logcat (OEM blocks main/system buffer reads on non-rooted ro.debuggable=0 builds), and no in-app logging option found in this version.

Android version

16

Device brand and model

Device: RedMagic 10S (NX789J), Android 16 (SDK 36)

Stock or custom OS?

Stock

Nextcloud android app version

App broken: 34.1.0 / App working: 33.1.2

Nextcloud server version

Server: Nextcloud 33.0.6 (snap), External Sites 8.0.1

Using a reverse proxy?

I don't know

Android logs

No response

Server error logs

Additional information

Additional context

34.1.0 released 2026-07-23; reproduces identically for both redirect true/false, suggesting a regression in how 34.x handles taps on non-native drawer entries in general, not something specific to External Sites' payload. Happy to provide the occ config:app:get external sites JSON or log excerpts on request.