fix(ai-judge): truncate advice widget with visible-width awareness

- delegate widget line truncation to pi-tui truncateToWidth so ANSI
  styling and double-width CJK reasons count visible cells only
- replace the code-point clamp that crashed the TUI when a Chinese
  reason rendered wider than the terminal
- add @earendil-works/pi-tui peer and dev dependencies
- cover CJK reasons at several terminal widths in tests

packages/pi-permission-ai-judge/package.json

@@ -31,11 +31,13 @@
   "peerDependencies": {
     "@earendil-works/pi-ai": "*",
     "@earendil-works/pi-coding-agent": "*",
+    "@earendil-works/pi-tui": "*",
     "@gotgenes/pi-permission-system": ">=32.0.0"
   },
   "devDependencies": {
     "@earendil-works/pi-ai": "^0.85.1",
     "@earendil-works/pi-coding-agent": "^0.85.1",
+    "@earendil-works/pi-tui": "^0.85.1",
     "@gotgenes/pi-permission-system": "^32.0.2",
     "@types/node": "^26.5.1",
     "@vitest/coverage-istanbul": "5.0.1",

packages/pi-permission-ai-judge/src/advice/widget.ts

@@ -1,3 +1,4 @@
+import { truncateToWidth } from "@earendil-works/pi-tui";
 import type { HighRiskCategory } from "../authority/highrisk";
 
 /**
@@ -78,18 +79,18 @@ function sanitizeLine(text: string, maxChars: number): string {
     return `${chars.slice(0, maxChars - 1).join("")}…`;
 }
 
-/** Clamp a rendered line to the live terminal width. */
-function clampToWidth(line: string, width: number): string {
+/** Clamp a rendered line to the live terminal width.
+ *
+ * Delegates to pi-tui's ANSI- and wide-char-aware truncation: theme-styled
+ * text counts only visible cells, so CJK reasons cannot overflow the
+ * terminal (the crash class pi-tui reports as "Rendered line exceeds
+ * terminal width").
+ */
+function clampToWidth(styledLine: string, width: number): string {
     if (width <= 0) {
         return "";
     }
-    const chars = [...line];
-    if (chars.length <= width) {
-        return line;
-    }
-    return width >= 2
-        ? `${chars.slice(0, width - 1).join("")}…`
-        : chars.slice(0, width).join("");
+    return truncateToWidth(styledLine, width, "…");
 }
 
 export interface AdviceLines {
@@ -168,7 +169,10 @@ export class AdvicePresenter {
         this.ui.setWidget(ADVICE_WIDGET_KEY, (_tui, theme) => ({
             render: (width: number) =>
                 lines.map((line, index) =>
-                    theme.fg(colors[index] ?? "dim", clampToWidth(line, width)),
+                    clampToWidth(
+                        theme.fg(colors[index] ?? "dim", line),
+                        width,
+                    ),
                 ),
             invalidate: () => {},
         }));

packages/pi-permission-ai-judge/test/advice.test.ts

@@ -1,4 +1,5 @@
 import { describe, expect, it, vi } from "vitest";
+import { visibleWidth } from "@earendil-works/pi-tui";
 import {
     ADVICE_WIDGET_KEY,
     AdvicePresenter,
@@ -8,8 +9,9 @@ import {
     type AdviceWidgetUi,
 } from "../src/advice/widget";
 
+/** ANSI-styled fake: invisible to truncateToWidth, like a real theme. */
 const theme: AdviceTheme = {
-    fg: (color, text) => `<${color}>${text}</>`,
+    fg: (_color, text) => `\x1b[35m${text}\x1b[0m`,
 };
 
 function render(component: AdviceComponent, width = 200): string[] {
@@ -139,14 +141,38 @@ describe("AdvicePresenter", () => {
         ) => AdviceComponent;
         const component = factory({}, theme);
         expect(render(component, 200)).toEqual([
-            "<accent>ai-judge defer — ambiguous intent</>",
+            "\x1b[35mai-judge defer — ambiguous intent\x1b[0m",
         ]);
-        expect(render(component, 10)[0]).toBe(
-            "<accent>ai-judge …</>",
-        );
+        const clamped = render(component, 10)[0]!;
+        expect(clamped.startsWith("\x1b[35mai-judge ")).toBe(true);
+        expect(clamped.endsWith("…"));
+        expect(visibleWidth(clamped)).toBeLessThanOrEqual(10);
         component.invalidate();
     });
 
+    it("never renders wider than the terminal for CJK reasons", () => {
+        const ui = recordingUi();
+        const presenter = new AdvicePresenter(ui, true);
+        presenter.present("req-1", {
+            state: "judgment",
+            verdict: "defer",
+            reason: "命令会重写已发布的历史记录且用户意图未确立".repeat(10),
+            shadow: false,
+        });
+        const factory = ui.calls[0]!.content as (
+            tui: unknown,
+            theme: AdviceTheme,
+        ) => AdviceComponent;
+        const component = factory({}, theme);
+        for (const width of [5, 20, 80, 120]) {
+            const lines = render(component, width);
+            for (const line of lines) {
+                expect(visibleWidth(line)).toBeLessThanOrEqual(width);
+            }
+        }
+        expect(visibleWidth(render(component, 20)[0]!)).toBeGreaterThan(0);
+    });
+
     it("is a no-op end to end when disabled", () => {
         const ui = recordingUi();
         const presenter = new AdvicePresenter(ui, false);

pnpm-lock.yaml

@@ -223,6 +223,9 @@ importers:
       '@earendil-works/pi-coding-agent':
         specifier: ^0.85.1
         version: 0.85.1(supports-color@7.2.0)(ws@8.21.3)(zod@4.6.5)
+      '@earendil-works/pi-tui':
+        specifier: ^0.85.1
+        version: 0.85.1
       '@gotgenes/pi-permission-system':
         specifier: ^32.0.2
         version: 32.0.2(@earendil-works/pi-coding-agent@0.85.1)(@earendil-works/pi-tui@0.85.1)