Closes #1540\n\n/claim #1540\n\nWhat this PR adds\n- Desktop deeplink actions: PauseRecording, ResumeRecording\n- Wired to existing recording handlers (pause_recording / resume_recording)\n\nNotes\n- Vercel check fails on this PR but this change is desktop (Rust/Tauri) only; please focus review on apps/desktop/src-tauri changes.\n\nDemo\n- (pending) I will attach a short demo video showing cap-desktop deeplink triggering pause/resume.