fix(codemode): preserve block tint across truncated rows

extensions/codemode-display/render.ts

@@ -99,6 +99,14 @@ const ICON_COLOR = {
 
 type Tone = "toolPendingBg" | "toolSuccessBg" | "toolErrorBg";
 
+/** Reapply the block tint after nested foreground styles reset all SGR state. */
+function paintBackground(theme: Theme, color: Tone, row: string) {
+  return row
+    .split("\u001b[0m")
+    .map((segment) => theme.bg(color, segment))
+    .join("\u001b[0m");
+}
+
 /** Mirror Pi's default tool shell (padded, tinted block) with a tone derived from all evidence. */
 function framed(
   theme: Theme,
@@ -115,15 +123,13 @@ function framed(
       if (edges.top) rows.unshift("");
       if (edges.bottom()) rows.push("");
       const bg = tone();
-      return rows.map((row) => {
-        const padded = row + " ".repeat(Math.max(0, width - visibleWidth(row)));
-        // Pi's truncation/wrapping resets all SGR styles. Reapply the owning
-        // card background after each reset, including ellipsis and padding.
-        return padded
-          .split("\x1b[0m")
-          .map((segment) => theme.bg(bg, segment))
-          .join("\x1b[0m");
-      });
+      return rows.map((row) =>
+        paintBackground(
+          theme,
+          bg,
+          row + " ".repeat(Math.max(0, width - visibleWidth(row))),
+        ),
+      );
     },
     invalidate() {},
   };

tests/extensions/codemode-display/render.test.ts

@@ -390,6 +390,24 @@ test("block tint is green only for a clean ledger, neutral for nested issues and
   assert.equal(tone(result("boom"), true), "toolErrorBg");
 });
 
+test("truncated rows keep the block background after nested foreground resets", () => {
+  const ansi = {
+    fg: (_color: string, text: string) => `\u001b[31m${text}\u001b[0m`,
+    bg: (_color: string, text: string) => `\u001b[44m${text}\u001b[0m`,
+    bold: (text: string) => text,
+  } as Theme;
+  const rows = codemodeRenderers.renderCall!(
+    { code },
+    ansi,
+    context(false),
+  ).render(40);
+  assert.ok(rows.length > 0);
+  assert.ok(
+    rows.some((row) => /\u001b\[0m\u001b\[44m/u.test(row)),
+    "each nested reset must reopen the block background",
+  );
+});
+
 test("compact call rows name their first string argument within the row budget", () => {
   const calls = [
     {