Revert "fix(dashboard): lazy-init useMobileKeyboard so remount has no stale render"

This reverts commit eb111f526e.

packages/engine/src/__tests__/pi-create-fn-agent.test.ts

@@ -993,36 +993,6 @@ describe("createFnAgent", () => {
     }));
   });
 
-  it("continues session creation when setting thinking level hits reasoning conflict", async () => {
-    const { piLog } = await import("../logger.js");
-    const warnSpy = vi.spyOn(piLog, "warn").mockImplementation(() => {});
-    const setThinkingLevel = vi.fn(() => {
-      throw new Error("400 cannot specify both 'thinking' and 'reasoning_effort'");
-    });
-
-    createAgentSessionMock.mockResolvedValueOnce({
-      session: {
-        prompt: vi.fn(),
-        subscribe: vi.fn(),
-        dispose: vi.fn(),
-        setThinkingLevel,
-      },
-    });
-
-    const { createFnAgent } = await import("../pi.js");
-
-    await expect(createFnAgent({
-      cwd: "/tmp",
-      systemPrompt: "test",
-      tools: "readonly",
-      defaultThinkingLevel: "high",
-    })).resolves.toBeTruthy();
-
-    expect(setThinkingLevel).toHaveBeenCalledWith("high");
-    expect(warnSpy).toHaveBeenCalledWith(expect.stringContaining("Disabling explicit thinking level"));
-    warnSpy.mockRestore();
-  });
-
   describe("skill selection", () => {
     beforeEach(() => {
       // Reset modules to ensure fresh imports for each test