Improve GitHub stars display precision to tenths of thousands

[Copilot]

toThousands was rounding to the nearest 1,000, causing e.g. 14,270 stars to display as 14K instead of 14.3K.

Changes

• toThousands: rounds to the nearest 100 and returns one decimal place

// Before
Math.round(n / 1_000)       // 14270 → 14

// After
Math.round(n / 100) / 10    // 14270 → 14.3

[Copilot]

Pull request overview

This PR adjusts the GitHub stars “K” formatting logic in the VitePress theme so star counts are displayed with tenths-of-a-thousand precision (e.g., 14,270 → 14.3K) instead of rounding to whole thousands.

Changes:

• Update toThousands rounding logic from nearest 1,000 to nearest 100 (i.e., tenths of a thousand).

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.