Preserve commit hyperlinks in colored log output

[fzlzjerry]

Summary

• match commit hashes against the ANSI-stripped visible text so SGR color sequences do not interfere with word boundaries
• map each match back to the original line before adding the OSC 8 link, preserving the existing color bytes in the displayed hash
• add regression coverage for a red, seven-character abbreviated commit hash

Fixes #2145.

Testing

• cargo test (438 passed, 8 ignored)
• cargo clippy -- -D warnings
• cargo fmt --all -- --check
• ./tests/test_deprecated_options
• env -u GIT_PAGER ./tests/test_navigate_less_history_file in a PTY

./tests/test_raw_output_matches_git_on_full_repo_history reports only pre-existing omissions of Binary files ... differ lines for old binary assets. The same diff reproduces on a clean origin/main worktree.

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