chore(vendor): import pi 1.3.0

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: 71023aec1546d6d677a65669c5665c0927ce0dd0

third_party/pi/packages/coding-agent/test/themed-text.test.ts

@@ -0,0 +1,26 @@
+import { afterEach, describe, expect, it } from "vitest";
+import { ThemedText } from "../src/modes/interactive/components/themed-text.ts";
+import { initTheme, theme } from "../src/modes/interactive/theme/theme.ts";
+
+afterEach(() => {
+	initTheme("dark");
+});
+
+describe("ThemedText", () => {
+	it("builds lazily and rebuilds with the current theme after invalidation", () => {
+		initTheme("dark");
+		let builds = 0;
+		const text = new ThemedText(() => {
+			builds++;
+			return theme.fg("accent", "hello");
+		});
+		expect(builds).toBe(0);
+		const dark = text.render(20).join("");
+
+		initTheme("light");
+		expect(text.render(20).join("")).toBe(dark);
+		text.invalidate();
+		expect(text.render(20).join("")).toContain(theme.getFgAnsi("accent"));
+		expect(builds).toBe(2);
+	});
+});