Implement clipboard and QR presentation

DEPENDENCIES.md

@@ -52,7 +52,9 @@ decision.
 | Secret values in memory | [`secrecy` 0.10](https://crates.io/crates/secrecy/0.10.3), [`zeroize` 1.9](https://crates.io/crates/zeroize/1.9.0) | MIT OR Apache-2.0 | `zeroize` selected for the storage-owned redacted byte type; consider `secrecy` only when typed exposure controls add value. |
 | Password generation | [`rand`](https://crates.io/crates/rand) | MIT OR Apache-2.0 | Preferred using the operating-system CSPRNG. |
 | TOTP and HOTP | [`hmac`](https://crates.io/crates/hmac), [`sha1`](https://crates.io/crates/sha1), [`sha2`](https://crates.io/crates/sha2), [`data-encoding`](https://crates.io/crates/data-encoding), [`url`](https://crates.io/crates/url) | MIT or MIT OR Apache-2.0 | Preferred small implementation with RFC test vectors. `totp-rs` is MIT but rejects HOTP URIs, so it cannot cover all of `pass-otp`. |
-| QR output and desktop image input | [`qrcode` 0.14](https://crates.io/crates/qrcode/0.14.1), [`rqrr` 0.10](https://crates.io/crates/rqrr/0.10.1) | MIT OR Apache-2.0; second crate also includes ISC | Suitable. Apple camera scanning should use AVFoundation and pass only the decoded URI to Rust. |
+| Native desktop clipboard | [`arboard` 3.6](https://crates.io/crates/arboard/3.6.1) | MIT OR Apache-2.0 | Selected with image support disabled and Wayland data-control enabled. Storage owns timeout, cleanup, and newer-content race policy; the safe adapter provides macOS, Windows, X11, and Wayland text access without helper processes. |
+| CLI cancellation | [`ctrlc` 3.5](https://crates.io/crates/ctrlc/3.5.2) | MIT OR Apache-2.0 | Selected for cross-platform interruption of the blocking clipboard lease. Ctrl-C requests storage cleanup before the CLI returns cancellation. |
+| QR output and desktop image input | [`qrcode` 0.14](https://crates.io/crates/qrcode/0.14.1), [`rqrr` 0.10](https://crates.io/crates/rqrr/0.10.1) | MIT OR Apache-2.0; second crate also includes ISC | `qrcode` selected without image features for storage-owned matrices and terminal rendering. `rqrr` is test-only round-trip verification. Apple camera scanning should use AVFoundation and pass only decoded bytes to Rust. |
 | Atomic file replacement and scoped filesystem access | [`cap-std` 4.0](https://crates.io/crates/cap-std/4.0.2), [`cap-tempfile` 4.0](https://crates.io/crates/cap-tempfile/4.0.2) | Apache-2.0 WITH LLVM-exception OR Apache-2.0 OR MIT | Selected. Directory capabilities prevent vault escape; temporary files are anonymous where supported and are synced before atomic replacement. |
 
 With this path, the central crate needs no third-party native GPG, Git, OTP, or