Make English the repository working language (#5)

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

packages/web/test/sheet-physics.test.ts

@@ -2,22 +2,22 @@ import { describe, expect, it } from "vitest";
 import { nearestSnap, project, rubberband } from "../src/lib/sheet-physics";
 
 describe("project", () => {
-  it("零速度零位移", () => {
+  it("zero velocity, zero displacement", () => {
     expect(project(0)).toBe(0);
   });
 
-  it("符合指数衰减投影公式（1000px/s @ 0.998 ≈ 499px）", () => {
+  it("matches the exponential-decay projection formula (1000px/s @ 0.998 ≈ 499px)", () => {
     expect(project(1000, 0.998)).toBeCloseTo(499, 0);
     expect(project(-1000, 0.998)).toBeCloseTo(-499, 0);
   });
 
-  it("减速率越低，投影越短（0.99 比 0.998 更快停下）", () => {
+  it("a lower decay rate projects shorter (0.99 stops faster than 0.998)", () => {
     expect(Math.abs(project(1000, 0.99))).toBeLessThan(Math.abs(project(1000, 0.998)));
   });
 });
 
 describe("rubberband", () => {
-  it("越界越多显示越多，但增量递减（渐进阻尼）", () => {
+  it("more overshoot shows more, with diminishing increments (progressive damping)", () => {
     const d = 800;
     const r50 = rubberband(50, d);
     const r100 = rubberband(100, d);
@@ -27,14 +27,14 @@ describe("rubberband", () => {
     expect(r100 - r50).toBeGreaterThan(r150 - r100);
   });
 
-  it("显示越界量恒小于实际越界量", () => {
+  it("the displayed overshoot is always less than the actual overshoot", () => {
     expect(rubberband(100, 800)).toBeLessThan(100);
     expect(rubberband(1, 800)).toBeLessThan(1);
   });
 });
 
 describe("nearestSnap", () => {
-  it("就近吸附", () => {
+  it("snaps to the nearest point", () => {
     const snaps = [0, 300, 800] as const;
     expect(nearestSnap(120, snaps)).toBe(0);
     expect(nearestSnap(180, snaps)).toBe(300);
@@ -42,7 +42,7 @@ describe("nearestSnap", () => {
     expect(nearestSnap(700, snaps)).toBe(800);
   });
 
-  it("恰在中点时取先出现的候选", () => {
+  it("exactly at the midpoint takes the earlier candidate", () => {
     expect(nearestSnap(150, [0, 300])).toBe(0);
   });
 });