Add SHA-3 / Keccak-256 hash reporting

[OWConnoi]

Summary

• adds SHA-3 / Keccak-256 calculation alongside MD5 and SHA-256 in the evidence table
• includes SHA-3 values in hash PDF, Word, Excel-compatible export, email CSV, and email forensic PDF reports
• logs completed SHA-3 calculations to the browser console for real-time traceability

Verification

• Inline app script parses successfully with new Function(...)
• git diff --check
• Playwright smoke test: uploaded a sample file and confirmed MD5, SHA-256, SHA-3 / Keccak-256 output and console logging
• Playwright export smoke test: generated Hash_Report.xls, Hash_Report.pdf, Hash_Report.docx, Email_Report.csv, and Forensic_Email_Report.pdf without page errors

Closes #2