Chrome 61 (Karoo WebView) cannot parse dynamic import() — a SyntaxError at
parse time prevents loadPyodide from ever being defined.
Fix: fetch pyodide.js as text, replace every import( with a __loadScript(
shim that uses <script> tag injection, then inject via Blob URL. The Blob
script is never pre-scanned for module syntax so the patch is invisible to
the parser.
Also: expose waitForEngine() from extractActivity so callers can await
engine readiness before batching files — manual scan now shows "Preparing
extraction engine…" instead of flooding with N individual failures.
Davide Scaini
1410be7427