[rupayon123]

With enhanced short options enabled, --name -ab currently expands -ab before it can be consumed as the value of --name. It changes the value to -a and enables -b. The same preprocessing changes literal arguments after -- and options belonging to a later subcommand.

Keep normalization inside the active argument context: preserve the next token of a known value-taking option, and stop at the existing terminator, subcommand boundary, or first positional argument when reordering is disabled. Existing registered numeric short aliases, boolean groups and attached-value forms keep working.

The regression tests exercise the public parser at both enhancement levels, with reordering enabled and disabled. They cover values, positional tails, numeric aliases, and unknown/mixed groups. I also verified the built CLI with pipes and real terminal input/output.

Validation on macOS arm64 with Go 1.26.0:

• Focused tests, full coverage suite, race suite, go vet ./..., go build ./..., and go mod tidy -diff pass. The full suites include the native terminal tests.
• Staticcheck reports the same 12 existing findings on the base and this patch, with no new findings.
• The test environment's inherited NO_COLOR=1 makes the existing TestVerbose fail on both the base and patch. Running with that variable unset passes the full suite.

The Linux/Go version matrix still needs CI.