fix(plugin-autocapture-browser): fix nearest label CSS coping

[daniel-graham-amplitude]

Summary

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Low Risk
Small DOM-query change in autocapture label enrichment only; improves event property accuracy with no auth or data-pipeline impact.

Overview
getNearestLabel in the autocapture browser plugin now applies :scope> to each heading selector (h1–h6), not only to span. Previously, headings in the compound selector could match any descendant of the current parent, so nested headings could be picked as [Amplitude] Element Parent Label when walking up the DOM.

A regression test covers a form input under a layout where a page-level h1 is not a direct child label of the input’s immediate ancestors, expecting an empty parent label.

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[linear-code]

SDK-229

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

Bugbot Autofix prepared a fix for the issue found in the latest run.

• ✅ Fixed: Regression test expects wrong label
  • Nested the page-title h1 under a header so the fixture exercises unscoped descendant matching instead of a sibling :scope>h1 hit.

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@cursor push a728934667

Preview (a728934667)

diff --git a/packages/plugin-autocapture-browser/test/data-extractor.test.ts b/packages/plugin-autocapture-browser/test/data-extractor.test.ts
--- a/packages/plugin-autocapture-browser/test/data-extractor.test.ts
+++ b/packages/plugin-autocapture-browser/test/data-extractor.test.ts
@@ -472,11 +472,13 @@
       // the parent. Walking up then picks the first ancestor that contains any
       // heading — e.g. a page title — instead of a sibling label.
       const container = document.createElement('div');
+      const header = document.createElement('header');
       const heading = document.createElement('h1');
       heading.innerText = 'My App';
       const form = document.createElement('form');
       const input = document.createElement('input');
-      container.appendChild(heading);
+      header.appendChild(heading);
+      container.appendChild(header);
       form.appendChild(input);
       container.appendChild(form);

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size-limit report 📦

Path	Size
packages/analytics-browser/lib/scripts/amplitude-min.js.gz	64.33 KB (+0.01% 🔺)
packages/session-replay-browser/lib/scripts/session-replay-browser-min.js.gz	135.32 KB (0%)
packages/unified/lib/scripts/amplitude-min.umd.js.gz	218.75 KB (+0.01% 🔺)
@amplitude/element-selector (gzipped esm)	3.4 KB (0%)