fix(web): normalize structured thought rows

web/src/structuredRender.test.ts

@@ -40,10 +40,15 @@ describe("buildTranscriptRow: user/agent/thought", () => {
     expect(ps[0].innerHTML).toContain("<code>three</code>");
   });
 
-  it("renders a thought row as plain text", () => {
-    const el = buildTranscriptRow(row("agent_thought", { content: { type: "text", text: "hmm" } }));
+  it("trims ACP framing whitespace and renders thought-row inline markdown", () => {
+    const el = buildTranscriptRow(
+      row("agent_thought", {
+        content: { type: "text", text: "\n\n**Planning comply tool commentary update**\n" },
+      }),
+    );
     expect(el.className).toContain("st-row-thought");
-    expect(el.textContent).toBe("hmm");
+    expect(el.textContent).toBe("Planning comply tool commentary update");
+    expect(el.querySelector("strong")?.textContent).toBe("Planning comply tool commentary update");
   });
 
   it("falls back to a labelled placeholder for non-text content, never crashing", () => {

web/src/structuredRender.ts

@@ -196,20 +196,21 @@ function makeCopyable(node: HTMLElement, text: string, label: string): void {
 function buildContentRow(row: TranscriptRow, variant: "user" | "agent" | "thought"): HTMLElement {
   const data = row.data as { content?: AcpContentBlock; messageId?: string } | undefined;
   const text = contentBlockText(data?.content);
+  const displayText = variant === "thought" ? text.trim() : text;
   const wrap = el("div", `st-row st-row-${variant}`);
   const body = el("div", "st-body");
   if (variant === "user") {
     const line = el("div", "st-user-text");
-    line.textContent = text;
+    line.textContent = displayText;
     body.appendChild(line);
   } else if (variant === "agent") {
-    renderProse(body, text);
+    renderProse(body, displayText);
   } else {
-    body.textContent = text;
+    body.innerHTML = renderInlineMarkdown(displayText);
   }
   wrap.appendChild(body);
   const label = variant === "user" ? "message" : variant === "agent" ? "response" : "thought";
-  makeCopyable(wrap, text, label);
+  makeCopyable(wrap, displayText, label);
   return wrap;
 }