[0x5t4l1n]

Summary

ForwardSpec::parse accepts a pre-bracketed IPv6 bind address
([::1]:8080) — it splits on the last :, retains the brackets in
bind_addr, and ssh_forward_arg / Display both round-trip correctly.
However this code path was untested, so a refactor could silently break it.

Also adds a boundary test for port 65535 (the highest valid u16 value),
which was not covered by the existing forward_spec_parse_rejects_zero_port
and forward_spec_parse_rejects_invalid tests.

New tests

Test	What it covers
forward_spec_parse_bracketed_ipv6_and_port	"[::1]:8080" parses correctly; ssh_forward_arg does not double-bracket; Display round-trips
forward_spec_parse_max_port_boundary	port 65535 accepted for both plain-port and addr:port forms

Test plan

• cargo test -p openshell-core forward_spec_parse — new tests pass
• cargo test -p openshell-core — no regressions

🤖 Generated with Claude Code

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