feat(agent): support Responses steering and project-aware tools

Use the dedicated TJWATER_AGENT_URL and Responses stream protocol. Keep running
turns active while users steer or queue follow-ups and edit pending delivery.
Refresh the model catalog before generation and preserve approval mode selection.

Integrate scoped investigation messaging/presentation, geographic place selection,
current Agent composer styles and supporting workbench contracts.

Validation: 77 focused Vitest checks, 21 browser cases, lint, typecheck and
production build. Preserve direct Server/Agent routing and project authentication.

tests/browser/workbench-top-bar-mobile.e2e.ts

@@ -10,7 +10,7 @@ test("top bar uses compact controls on narrow mobile viewports", async ({ page }
   );
   await expect(page.getByRole("button", { name: "切换模拟方案" })).toBeHidden();
   await expect(page.getByRole("button", { name: "切换地图 Dev Panel" })).toBeHidden();
-  const alertButton = page.getByRole("button", { name: /查看异常处置面板/ });
+  const alertButton = page.getByRole("button", { name: /查看待办与告警/ });
   const userButton = page.getByRole("button", { name: "打开用户菜单" });
   await expect(alertButton).toBeVisible();
   await expect(userButton).toBeVisible();
@@ -55,6 +55,6 @@ test("top bar keeps text horizontal at the desktop breakpoint", async ({ page })
         return style.display !== "none" && style.visibility !== "hidden" && rect.width > 0 && rect.height > 0;
       })
       .map((span) => span.textContent?.trim())
-      .filter((text) => text === "任务浮条" || text === "工况任务" || text === "异常处置").length;
+      .filter((text) => text === "任务浮条" || text === "工况任务" || text === "待办与告警").length;
   })).toBe(0);
 });