chore(vendor): import pi 0.85.1

Imported as a linear vendor commit so forge rebases do not replay the upstream root tree.

git-subtree-dir: third_party/pi

git-subtree-split: d981de1229ef899957bbe968bc8dcda02a21f477

third_party/pi/packages/tui/test/test-themes.ts

@@ -0,0 +1,38 @@
+/**
+ * Default themes for TUI tests using chalk
+ */
+
+import { Chalk } from "chalk";
+import type { EditorTheme, MarkdownTheme, SelectListTheme } from "../src/index.ts";
+
+const chalk = new Chalk({ level: 3 });
+
+export const defaultSelectListTheme: SelectListTheme = {
+	selectedPrefix: (text: string) => chalk.blue(text),
+	selectedText: (text: string) => chalk.bold(text),
+	description: (text: string) => chalk.dim(text),
+	scrollInfo: (text: string) => chalk.dim(text),
+	noMatch: (text: string) => chalk.dim(text),
+};
+
+export const defaultMarkdownTheme: MarkdownTheme = {
+	heading: (text: string) => chalk.bold.cyan(text),
+	link: (text: string) => chalk.blue(text),
+	linkUrl: (text: string) => chalk.dim(text),
+	code: (text: string) => chalk.yellow(text),
+	codeBlock: (text: string) => chalk.green(text),
+	codeBlockBorder: (text: string) => chalk.dim(text),
+	quote: (text: string) => chalk.italic(text),
+	quoteBorder: (text: string) => chalk.dim(text),
+	hr: (text: string) => chalk.dim(text),
+	listBullet: (text: string) => chalk.cyan(text),
+	bold: (text: string) => chalk.bold(text),
+	italic: (text: string) => chalk.italic(text),
+	strikethrough: (text: string) => chalk.strikethrough(text),
+	underline: (text: string) => chalk.underline(text),
+};
+
+export const defaultEditorTheme: EditorTheme = {
+	borderColor: (text: string) => chalk.dim(text),
+	selectList: defaultSelectListTheme,
+};