ge-hch.5.15.19: add tests for player preference tracker #173
+28
−6
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Summary\n- add acceptance-focused unit tests for player preference tracker\n - 3 accepts + 1 reject > 0.6 for dialogue\n - cold start returns 0.5\n - localStorage persistence and corruption handling\n - 100+ events remain under 10ms (smoke perf)\n- keep existing coverage for bad inputs and ratio updates\n\n## Testing\n- npx jest tests/unit/player-preference.test.js --runInBand\n\nCloses bd#ge-hch.5.15.19