[Programcode]

Importing a page could fail in two ways that showed up as a toast. A numeric character like � threw inside String.fromCodePoint and that exception text was shown to the student. A page with thousands of unclosed <meta or <nav tags could also stall the function on a slow regular expression (called out as security-edge-7 in the October review).

The HTML helpers now walk the document once. Bad code points become empty text instead of throwing. Unclosed tags are skipped instead of being re-scanned. The import deadline is no longer cleared before that parse.

No UI change. A page that used to crash now imports, or fails with the existing import error rather than a parser exception.

Verified locally (GitHub Actions is out of minutes, so this is not a CI pass):

• deno test supabase/functions/import-source/ (23 passed), including the bad-entity case and the 8,000 unclosed meta / 4,000 unclosed nav cases finishing in under half a second

Not run: npm run verify or a live URL import in the browser.

  

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