Completed the iOS quiche packaging path with the generated Quiche.xcframework, CocoaPods C wrapper, and Swift bridge for QUIC DATAGRAMs and raw reliable streams.

Validated an iPadOS 18.7.9 client against a macOS QUIC server: handshake, one-byte DATAGRAM delivery, and clean connection closure.

Retried temporary local-network socket errors while the iOS permission alert is shown, so accepting the alert no longer fails the pending QUIC handshake.

Added the physical iPad handshake integration test and documented the macOS, simulator, and device validation workflow.

Fixed reliable-stream backpressure without consuming the public event subscription or losing writable notifications during a native call.

Serialized FIN behind successful sends, rejected writes after FIN, and interrupted pending sends, FIN and opens on endpoint closure.

Kept FIN and terminal events behind buffered received data, including when listeners attach late; receive streams now end on remote FIN/reset.

Routed connection failures to affected streams and removed per-event string keys from the Dart stream registry.

Recycled native stream tracking slots, reported open/flush failures, retained socket output on temporary backpressure, and limited writable notifications to blocked senders. Endpoint shutdown now sends CONNECTION_CLOSE.

Added Android regression coverage for 80 sequential unidirectional streams per direction, with exact byte checks at 1, 2, 8 and 64 KiB, reset propagation, graceful endpoint close and abrupt peer process termination.

Validated both Android scenarios on Pixel/Mi hardware; 40 package tests and 11 example tests pass. See native/STREAM_VALIDATION.md for scope and limits.