Add parser unit test for a new OCR typo from live logs

[sbrants]

Summary

WaveTrace's parser (src-tauri/src/parser.rs) grows through real OCR quirks seen in live scanner logs. Adding a focused unit test is a good first Rust contribution.

Task

1. Pick an OCR string variant that is not yet covered (search parser.rs tests for ocr_quirks, live_ocr, wave_skip_ocr_typos).
2. Add a table-driven test case with the expected CoinReading, tier, or wave parse result.
3. If the parser does not handle the case yet, implement the minimal fix and cite the game/OCR context in the test name.

No game window or fixture capture required — unit tests only.

References

• CONTRIBUTING.md
• Goal.md — Value parsing
• src-tauri/src/parser.rs