feat: share the proposal board across chats

The unfinished-proposal board is now visible to every conversation,
with entries marked scope=own/scope=other (chat type only, no IDs), so
anyone can see what the single worker is busy with. All actions remain
owner-only, and pending reminders still target only the owner.

test/gateway.test.ts

@@ -658,11 +658,27 @@ test("the list panel orders pending first, then working, queued, proposed, and r
     .map((section) => reply.indexOf(section));
   assert.ok(order.every((index) => index >= 0), reply);
   assert.deepEqual([...order].sort((a, b) => a - b), order);
-  assert.match(reply, /p-pending「待确认任务」：做了一半（问你：继续吗？）/);
+  assert.match(reply, /p-pending「待确认任务」（你的）：做了一半（问你：继续吗？）/);
   assert.match(reply, /\/finish 结束/);
-  assert.match(reply, /p-working「干活中」正在执行/);
-  assert.match(reply, /p-cancelled「取消任务」已取消/);
-  assert.match(reply, /p-finished「旧任务」已完成/);
+  assert.match(reply, /p-working「干活中」（你的）正在执行/);
+  assert.match(reply, /p-cancelled「取消任务」（你的）已取消/);
+  assert.match(reply, /p-finished「旧任务」（你的）已完成/);
+});
+
+test("the list panel shows other members' proposals without exposing their identity", async () => {
+  const { runtime, gateway } = createGateway();
+  const adapter = recordingAdapter();
+  runtime.proposals = [
+    fakeProposal({ id: "p-mine", title: "我的任务", status: "working" }),
+    fakeProposal({ id: "p-other", title: "别人的任务", status: "pending", ownerChatKey: "qq:group:g-secret-9", requesterUserId: "someone-else", pending: { summary: "做到一半", receivedAt: 5 } })
+  ];
+
+  const list = await gateway.receive(message("/list"), adapter, { synchronous: true });
+  const reply = list.reply || "";
+  assert.match(reply, /p-other「别人的任务」（其他成员）：做到一半/);
+  assert.match(reply, /p-mine「我的任务」（你的）正在执行/);
+  assert.doesNotMatch(reply, /someone-else/);
+  assert.doesNotMatch(reply, /g-secret-9/);
 });
 
 test("synchronous work sends no delivery messages", async () => {