test(coverage): case-aware path regressions for diff CLI and indoor kits

[cursor]

Risky behavior now covered

• is_kotor_install_dir (diff/kotordiff CLI): After PR Case-aware application #151, install detection uses CaseAwarePath so a mismatched directory or chitin.key casing still resolves on case-sensitive Linux mounts (common in modding/WSL workflows).
• normalize_path_arg: PowerShell/Steam path quoting edge cases (mangled " path, trailing backslashes, wrapped quotes) — previously untested despite being user-facing CLI input handling.
• load_kits_unified: Kit folder paths with wrong directory casing no longer silently yield zero kits on Linux.

Test files added/updated

• Libraries/PyKotor/tests/diff_tool/test_cli_utils.py (new)
• Libraries/PyKotor/tests/test_indoorkit_case_path.py (new)

Why these tests materially reduce regression risk

PR #151 changed production paths to CaseAwarePath without dedicated tests for diff_tool/cli_utils or tools/indoorkit. A future refactor back to plain Path would break install detection and kit loading for users on case-sensitive filesystems while appearing fine on Windows CI. These tests follow the same skip pattern as test_talktable.py for platform semantics and lock in the intended behavior with minimal fixtures.

Validation

uv run --directory Libraries/PyKotor pytest tests/diff_tool/test_cli_utils.py tests/test_indoorkit_case_path.py -v

13 passed (case-mismatch tests skipped on win32 by design).

  

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