Replaces the informational "Share link: {url}" toast on Android with a
real clipboard write via ClipboardManager JNI. Falls back to the old
toast on JNI error so the user can still copy the URL manually.
Adds `jni = "0.21"` (default-features = false) as a workspace dep;
`jni 0.21.1` was already in Cargo.lock as a transitive dep so no new
packages are fetched.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
funman300
2c822ba2d7