chore: set FORCE_COLOR=1 in test env for realistic ANSI output

Tests must exercise the same ANSI code paths users see. Without
FORCE_COLOR, chalk disables all color in non-TTY test environments,
making style bugs invisible to the test suite.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

AGENTS.md

@@ -5,6 +5,7 @@
 - Always use `defineComponent()` to define components. Never use bare `{ setup() {} }` objects — they lack component scope, so `inject`, `watch`, and `onScopeDispose` won't work correctly.
 - Vue SFCs must use `<script setup>` unless there's an explicit reason not to.
 - Bug fixes must follow test-first: write a failing test that reproduces the bug, then fix the code and verify the test passes.
+- Tests must simulate real user conditions. Non-TTY environments disable chalk colors — use `FORCE_COLOR` env var so ANSI output is always exercised. A bug invisible in tests but visible in a real terminal is a testing gap, not a minor issue.
 - When debugging color/ANSI output in non-TTY environments (e.g. Claude Code shell), use `FORCE_COLOR=3` env var to force chalk to output ANSI codes.
 - After completing any task, run `vp run ready` (or `vpr ready`) to verify: lint, type-check, test all packages, and build.
 

packages/runtime-tests/integration/components/background-color.test.tsx

@@ -1,19 +1,9 @@
-import chalk from "chalk";
-import { afterEach, beforeEach, expect, test } from "vite-plus/test";
+import { expect, test } from "vite-plus/test";
 import { render } from "@vue-tui/testing";
 import { Box, Text } from "@vue-tui/runtime";
 
 const BG_BLUE = "\x1b[44m";
 
-let prevLevel: typeof chalk.level;
-beforeEach(() => {
-  prevLevel = chalk.level;
-  chalk.level = 1;
-});
-afterEach(() => {
-  chalk.level = prevLevel;
-});
-
 test("Box backgroundColor produces ANSI background codes", async () => {
   const { frames } = await render(
     () => <Box backgroundColor="blue" width={5} height={1} />,

packages/runtime-tests/vite.config.ts

@@ -3,6 +3,10 @@ import vueJsx from "@vitejs/plugin-vue-jsx";
 
 export default defineConfig({
   plugins: [vueJsx()],
+  test: {
+    // chalk disables color in non-TTY envs; force it on so ANSI style bugs don't hide from tests
+    env: { FORCE_COLOR: "1" },
+  },
   lint: {
     options: { typeAware: true, typeCheck: true },
   },