When selectedPrivateChatPeer was migrated to a 64-hex stable Noise key
after session establishment, file transfers would silently fail because:
1. Sender used raw 64-hex key, truncated to first 8 bytes by BinaryProtocol
2. Receiver's myPeerID is SHA256-fingerprint-derived (different value)
3. Recipient check failed, causing silent packet drop
The fix normalizes peerID to short form (SHA256-derived 16-hex) in
sendFilePrivate before constructing recipientData, ensuring the wire
format matches what receivers expect.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* PeerID 28/n: `ChatViewModel.getShortIDForNoiseKey`
* PeerID 29/n: `BLEService` + remove dupe funcs from #823
* `handleFileTransfer` to use PeerID
* `sendMessage` and `sendPrivateMessage`
* PeerID 30/n: Update some leftovers
* `lowercased()` inside PeerID for normalization
* PeerID 31/n: Remove String interop to be explicit
* MockBLEService: Remove direct target delivery
This causes a delivery even if the sender and receiver are not connected
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Co-authored-by: jack <jackjackbits@users.noreply.github.com>
