feat: display toggles, smart session resume, fix stale transcript pane (#8)

src/__tests__/markdown.test.ts

@@ -139,6 +139,45 @@ describe("buildThreadMarkdown", () => {
     expect(markdown).toContain("`web_fetch` — failed");
   });
 
+  it("omits tools and reasoning when the preferences are off", () => {
+    const messages = [
+      message({
+        role: "assistant",
+        text: "a",
+        thinking: "let me think",
+        toolCalls: [{ name: "web_search", arguments: {}, result: "ok", isError: false }],
+      }),
+    ];
+
+    const hidden = buildThreadMarkdown(messages, { showToolCalls: false, showReasoning: false });
+
+    expect(hidden).not.toContain("Tools used");
+    expect(hidden).not.toContain("web_search");
+    expect(hidden).not.toContain("Reasoning");
+    expect(hidden).not.toContain("let me think");
+    // The answer itself must survive either way.
+    expect(hidden).toContain("a");
+  });
+
+  it("shows one section without the other", () => {
+    const messages = [
+      message({
+        role: "assistant",
+        text: "a",
+        thinking: "let me think",
+        toolCalls: [{ name: "web_search", arguments: {}, result: "ok", isError: false }],
+      }),
+    ];
+
+    const toolsOnly = buildThreadMarkdown(messages, { showToolCalls: true, showReasoning: false });
+    expect(toolsOnly).toContain("Tools used");
+    expect(toolsOnly).not.toContain("Reasoning");
+
+    const reasoningOnly = buildThreadMarkdown(messages, { showToolCalls: false, showReasoning: true });
+    expect(reasoningOnly).not.toContain("Tools used");
+    expect(reasoningOnly).toContain("Reasoning");
+  });
+
   it("only shows a reasoning section when there is reasoning", () => {
     expect(buildThreadMarkdown([message({ role: "assistant", text: "a" })])).not.toContain("Reasoning");
     expect(buildThreadMarkdown([message({ role: "assistant", text: "a", thinking: "hmm" })])).toContain(