feat(agent): in-drawer history tab and denser session layout (AGUI-2)

- Drawer tabs 当前/历史: searchable run list (status/source/time filters,
  cursor auto-load), opens runs inside the drawer, keeps scroll and filters,
  remembers the last tab; 在页面打开 is secondary
- Ended runs: append to resume, or 用同目标新建 with 先看方案再执行 toggle
- Session page: 88ch conversation column, turns grouped with one timestamp,
  tool cards collapse to one line, 3+ activities fold; steps/subagents/budget
  moved to a right rail (collapsible overview bar on narrow screens and in
  the drawer), long model reports fold behind 展开全文
- Smoke covers the drawer history flow

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/web/scripts/smoke.mjs

@@ -250,6 +250,36 @@ async function main() {
     }
   }
 
+  // ── 交互:Agent 抽屉「历史」Tab(AGUI-2;演示数据,点一条在抽屉内打开、返回列表、关了再开仍停在历史)──
+  {
+    const label = "Agent 抽屉 → 历史 → 抽屉内打开会话";
+    problems = [];
+    const t0 = Date.now();
+    try {
+      await page.goto("about:blank");
+      await page.goto(`${BASE}/console/audit?mock=1`, { waitUntil: "networkidle", timeout: 30_000 });
+      const launcher = page.locator("[data-agent-launcher]:visible").last();
+      await launcher.click();
+      await page.getByRole("tab", { name: "历史" }).click();
+      const list = page.getByRole("navigation", { name: "Agent 会话列表" });
+      await list.getByRole("button").first().click();
+      await page.getByRole("button", { name: "返回列表" }).waitFor({ timeout: 10_000 });
+      if (new URL(page.url()).pathname !== "/console/audit") problems.push("点历史会话跳走了页面");
+      await page.getByRole("button", { name: "返回列表" }).click();
+      await list.waitFor({ timeout: 5_000 });
+      await page.keyboard.press("Escape");
+      await launcher.click();
+      const tab = await page.getByRole("tab", { name: "历史" }).getAttribute("aria-selected");
+      if (tab !== "true") problems.push("再次打开没有停在「历史」");
+      if (SHOTS) await page.screenshot({ path: join(OUT, "agent_drawer_history.png") }).catch(() => {});
+      await page.keyboard.press("Escape");
+      await page.goto(`${BASE}/console/agent?mock=0`, { waitUntil: "networkidle", timeout: 30_000 });
+    } catch (err) {
+      problems.push(`交互失败:${String(err?.message ?? err).split("\n")[0]}`);
+    }
+    results.push({ path: label, ms: Date.now() - t0, problems: [...new Set(problems)] });
+  }
+
   // ── 旧链接重定向 ──
   for (const r of REDIRECT_ROUTES) {
     let from = r.from;