fix: ColorModifier bugs - swapped min/max calculation and global wasm reference (#189)

## Summary

Fixes #184

Fixes three bugs in the ColorModifier:
1. **Swapped min/max calculation** (lines 164-166): `Math.max` and
`Math.min` were swapped, causing incorrect min/max values
2. **Global wasm reference** (line 157): Uses global `wasm` variable
instead of `input.wasm`
3. **Debug code in production** (line 162): Removed
`window.perAtomArray` assignment

## Changes

- Fixed min/max calculation by swapping Math.max/min
- Replaced `wasm` with `input.wasm` for proper scoping
- Removed debug code `window.perAtomArray` assignment

## Impact

The swapped min/max values were causing incorrect color mapping for
particle visualization based on compute values.

---

This pull request contains changes generated by a Cursor Cloud Agent

<a
href="https://cursor.com/background-agent?bcId=bc-242f3cde-9d37-4376-92bc-3baf88c02fec"><picture><source
media="(prefers-color-scheme: dark)"
srcset="https://cursor.com/open-in-cursor-dark.svg"><source
media="(prefers-color-scheme: light)"
srcset="https://cursor.com/open-in-cursor-light.svg"><img alt="Open in
Cursor"
src="https://cursor.com/open-in-cursor.svg"></picture></a>&nbsp;<a
href="https://cursor.com/agents?id=bc-242f3cde-9d37-4376-92bc-3baf88c02fec"><picture><source
media="(prefers-color-scheme: dark)"
srcset="https://cursor.com/open-in-web-dark.svg"><source
media="(prefers-color-scheme: light)"
srcset="https://cursor.com/open-in-web-light.svg"><img alt="Open in Web"
src="https://cursor.com/open-in-web.svg"></picture></a>

Author: andeplane

src/modifiers/colormodifier.ts

@@ -154,16 +154,18 @@ class ColorModifier extends Modifier {
     compute.lmpCompute.sync();
     const perAtomDataPtr = compute.lmpCompute.getPerAtomData() / 8;
     //@ts-ignore
-    const perAtomArray = wasm.HEAPF64.subarray(
+    const perAtomArray = input.wasm.HEAPF64.subarray(
       perAtomDataPtr,
       perAtomDataPtr + output.particles.count,
-    ) as Float32Array;
-    //@ts-ignore
-    window.perAtomArray = perAtomArray;
-    // @ts-ignore
-    const minValue = Math.max.apply(null, perAtomArray);
-    // @ts-ignore
-    const maxValue = Math.min.apply(null, perAtomArray);
+    ) as Float64Array;
+    // Calculate min/max using a loop to avoid stack overflow for large arrays
+    let minValue = Infinity;
+    let maxValue = -Infinity;
+    for (let i = 0; i < perAtomArray.length; i++) {
+      const value = perAtomArray[i];
+      minValue = Math.min(minValue, value);
+      maxValue = Math.max(maxValue, value);
+    }
     perAtomArray.forEach((value, index) => {
       const realIndex = output.particles.indices[index];
       const colorIndex = Math.floor(