feat(crafting): runic golem crafting, core infusions, and guardian patrol engine

[angelTomo9]

Summary

Implements an ancient runic golem workshop, elemental core infusion, guardian patrol radius, and self-repair engine for OpenAO MMORPG.

Features

• Chassis materials catalog (Granite, Obsidian, Mithril, Aether Crystal)
• Elemental core infusions (Fire, Lightning, Void, Earth)
• Patrol territory radius bounding calculations
• Guardian slam attacks with target armor mitigation
• Automated time-based core self-repairs
• Full unit test coverage under Vitest

[gitar-bot]

Code Review ✅ Approved 1 resolved / 1 findings

Implements runic golem crafting with elemental core infusions, guardian patrol engine, and automated time-based self-repair. Fixes fractional HP loss on frequent self-repair calls and includes comprehensive unit test coverage.

✅ 1 resolved

✅ Bug: Self-repair loses fractional HP on frequent calls

📄 api/src/lib/runicGolemCrafting.ts:162-169
performSelfRepair sets lastSelfRepairEpochMs = currentEpochMs on every call but computes repair as Math.floor(elapsedSeconds * repairRatePerSecond). When called at short intervals, the sub-1 HP fraction is floored to 0 while the timestamp still advances, so the accumulated fraction is discarded and the golem effectively never heals (e.g. a LIGHTNING/VOID core polled every ~100ms yields floor(0.4)=0 each tick). Fix by only advancing lastSelfRepairEpochMs by the time actually consumed by the granted HP (or carry the remainder), so repair accumulates across ticks.

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