Fix AI vertical threat detection blind spot on center columns#6

Merged

CodeKunalTomar merged 9 commits intomainfrom

copilot/fix-connect4-ai-bugs

Dec 12, 2025

Commits on Dec 12, 2025

Initial plan
Copilot
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Implement all critical AI bug fixes and optimizations

Copilot
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CodeKunalTomar
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Add test cases for center column vertical threats

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CodeKunalTomar
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Move MIN_DEPTH to AI_CONFIG for better organization

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CodeKunalTomar
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Fix win score handling to use constants instead of sign check

Copilot
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CodeKunalTomar
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Add helper functions for win score detection with depth bonus support

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CodeKunalTomar
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Use AI_CONFIG constant for vertical threat weight and clarify comments

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CodeKunalTomar
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Polish comments for consistency and conciseness

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CodeKunalTomar
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Fix tie-breaking logic to use bestScore instead of node.score

Copilot
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CodeKunalTomar
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