feat: surface codex app server thread visibility

tests/fixtures/codex-app-server-runtime.mjs

@@ -381,6 +381,56 @@ rl.on("line", (line) => {
     return;
   }
 
+  if (message.method === "thread/list") {
+    send({
+      id: message.id,
+      result: {
+        data: [
+          {
+            id: "thr-active",
+            name: "Boss App Server rollout",
+            sourceKind: "app",
+            archived: false,
+            updatedAt: "2026-06-03T08:20:00.000Z",
+            cwd: "/Users/kris/code/boss",
+            status: { type: "active", activeFlags: ["running"] },
+            turns: [{ userInput: "secret user text should not leak" }],
+          },
+          {
+            id: "thr-idle",
+            name: "AItoukui planning",
+            sourceKind: "cli",
+            archived: false,
+            updatedAt: "2026-06-03T07:00:00.000Z",
+            cwd: "/Users/kris/code/AItoukui",
+            status: { type: "idle" },
+          },
+          {
+            id: "thr-archived",
+            name: "Old private thread",
+            sourceKind: "app",
+            archived: true,
+            updatedAt: "2026-06-01T01:00:00.000Z",
+            cwd: "/Users/kris/private",
+            status: { type: "notLoaded" },
+          },
+        ],
+        nextCursor: null,
+      },
+    });
+    return;
+  }
+
+  if (message.method === "thread/loaded/list") {
+    send({
+      id: message.id,
+      result: {
+        threadIds: ["thr-active", "thr-idle"],
+      },
+    });
+    return;
+  }
+
   if (message.method === "thread/resume") {
     send({
       id: message.id,