fix: align humanize timeout default with Playwright's 30s auto-retry (#172)

The humanize layer hardcoded timeout=2000ms for element lookups, causing
locator.click() and page.click() to fail instantly instead of retrying
for 30s like standard Playwright. Aligned all defaults to 30000ms across
Python sync/async, JS Playwright, and JS Puppeteer paths. Bumped the
outer retry sleep from 200ms to 500ms for DOM mutation settle time.

js/tests/humanize.test.ts

@@ -1108,7 +1108,7 @@ describe("page.click(selector, { timeout }) forwards timeout to scroll", () => {
     expect(boundingBox).toHaveBeenCalledWith({ timeout: 5000 });
   });
 
-  it("default timeout stays 2000ms when not specified", async () => {
+  it("default timeout matches Playwright's 30000ms when not specified", async () => {
     const { scrollToElement } = await import("../src/human/scroll.js");
     const cfg = resolveConfig("default");
 
@@ -1125,7 +1125,7 @@ describe("page.click(selector, { timeout }) forwards timeout to scroll", () => {
     };
 
     await scrollToElement(page, raw, "#x", 0, 0, cfg);
-    expect(boundingBox).toHaveBeenCalledWith({ timeout: 2000 });
+    expect(boundingBox).toHaveBeenCalledWith({ timeout: 30000 });
   });
 
   it("page.click({ timeout }) reaches scrollToElement", async () => {

js/tests/stealth.puppeteer.test.ts

@@ -1671,11 +1671,13 @@ describe("Puppeteer: isInputElement stealth integration via patchPage", () => {
       }),
     });
 
+    const mockEl = buildMockElementHandle();
     const page = buildMockPage({
       evaluate: vi.fn(async (...args: any[]) => {
         evaluateCalls.push(args);
         return false;
       }),
+      $: vi.fn(async () => mockEl),
     });
     page.createCDPSession = vi.fn(async () => mockCdp);