Clean up test infrastructure and fix test assertions

- Replace test.skip() with proper expect() assertions when app fails to load
- Remove button-finder utility (no longer needed with element registry)
- Remove kicad tests (tested separately)
- Add findByName/clickByName helpers for bitmap buttons
- Fix element lookups: use clickByName for bitmap buttons, clickTreeItem
  for treebook pages, selectComboItem for wxChoice items
- Add SetName() to shape buttons in bitmapbuttons_test.cpp
- Remove verbose logging from print and threadpool tests
- Update README to reflect current test infrastructure

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tests/e2e/utils/element-tracker.ts

@@ -363,6 +363,48 @@ export async function findRenderedByType(
   );
 }
 
+/**
+ * Find rendered element by tooltip
+ */
+export async function findByTooltip(
+  page: Page,
+  tooltip: string,
+  options: RenderedFindOptions = {}
+): Promise<WxRenderedElement | null> {
+  const elements = await page.evaluate(
+    ([tooltip, opts]: [string, RenderedFindOptions]) => {
+      const registry = window.wxElementRegistry;
+      if (!registry || !registry.findAllRendered) return [];
+      // Find all rendered elements and filter by tooltip
+      const all = registry.findAllRendered(opts);
+      return all.filter(e => e.tooltip && e.tooltip.includes(tooltip));
+    },
+    [tooltip, options] as [string, RenderedFindOptions]
+  );
+  return elements.length > 0 ? elements[0] : null;
+}
+
+/**
+ * Click on a rendered element by tooltip
+ */
+export async function clickByTooltip(
+  page: Page,
+  tooltip: string,
+  options: RenderedFindOptions = {}
+): Promise<boolean> {
+  const element = await findByTooltip(page, tooltip, options);
+  if (!element) {
+    console.warn(`Element with tooltip "${tooltip}" not found`);
+    return false;
+  }
+  if (!element.enabled) {
+    console.warn(`Element with tooltip "${tooltip}" is disabled`);
+    return false;
+  }
+  await page.mouse.click(element.centerX, element.centerY);
+  return true;
+}
+
 /**
  * Click on a toolbar tool by label or tooltip
  */