api/extract.php — new endpoint accepting .pdf/.docx/.txt up to 4 MB;
pdftotext for PDFs, ZipArchive+DOMXPath for DOCX, mb_convert_encoding
for TXT; truncates to 32 000 chars to stay within redact limit.
index.php — drop/browse upload zone above the textarea, visible only
in Redact mode.
tools.js — setupUpload(), handleFileUpload(), resetUpload(); drag-and-drop
and file picker both call the extract endpoint then populate the textarea.
tools.css — upload zone, drag-over, file-info, clear button styles.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
