Desktop machine no longer offered as target for new local sessions from mobile app (cloud only)

Until recently I could create new local sessions on my Windows desktop from the Claude iOS app (iPad/iPhone) — the machine appeared as a target alongside cloud. It no longer appears: the new-session flow only offers cloud, and the repository list shown is my GitHub repos (cloud environments), not the machine's local folders.

What still works: per-session Remote Control. Sessions started on the desktop appear on mobile and can be driven from there. Only the ability to create a new local session from mobile is gone.

Environment

• Desktop: Windows 11 Pro, Claude desktop app (up to date as of 2026-07-19), signed in via claude.ai OAuth (Max plan)
• Mobile: Claude iOS app on iPad and iPhone, up to date
• No ANTHROPIC_API_KEY or non-default ANTHROPIC_BASE_URL in the environment (a stray user-level API key was found and removed during troubleshooting; removing it restored Remote Control but not the device picker)

Diagnostics from main.log

• Device bridge connects and authenticates: [remote-tools-device] connecting wss://bridge.claudeusercontent.com/devices/<id>/<device-name>/bridge → authenticated
• ccRemoteControlDefaultEnabled: true, remoteToolsDeviceName set
• Init line shows [remote-tools-device] init: manta=off shrimp=on — suspecting a server-side flag gates the new-session device picker

Steps tried, no effect: full desktop app restart, desktop update check, mobile sign-out + force-quit + sign-in. Behavior is account-level (same on both my Windows machines).

Expected: the connected desktop appears as a target when creating a new session from the mobile app, as it did previously.