feat(classic-games): 新增 Mini Obstruction 小游戏

[wyf027]

Summary

• 新增单文件 HTML + TailwindCSS 小游戏：Mini Obstruction
• 文件路径：project/classic-games/20260717-2324-obstruction-lite.html
• 历史扫描显示 Obstruction / obstruction-lite 未使用，本次选择该经典纸笔封锁玩法

Validation

• 确认文件存在并包含完整 HTML 结构、TailwindCSS CDN 与可运行游戏逻辑
• 通过关键标记检查：startGame、neighborsOf、availableCells、applyMove、scoreCell、chooseAiMove、chooseCell、checkGame、render、addEventListener
• 通过内联脚本语法检查：new Function(...)
• 通过 git diff --check -- project/classic-games/20260717-2324-obstruction-lite.html

Audit

• 审计脚本：run-audit.sh
• 结果：OVERALL_EXIT=0
• WARN：无
• AUDIT_DIR：/tmp/git-commit-audit-20260717-232855-49802

Commit

• Local commit: a5566978511d913fa934718a32de6592b9dfe427
• Remote commit: dcad6e5f80706ffe22ed581891c1930bdf461e2e

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: dcad6e5f80

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[chatgpt-codex-connector]

Cancel pending AI turns when restarting

When the player clicks New Game during this 260 ms AI delay, the scheduled callback still runs against the freshly reset board because startGame() does not clear or invalidate the timeout. This makes the new game unexpectedly receive an AI move and blocked neighbors immediately after restart, so the reset state is corrupted unless the user waits for the old AI turn to finish.

Useful? React with 👍 / 👎.