Add Transcribe docs (about/guide/tech) + refresh Redact docs

- New: transcribe-about.php, transcribe-guide.php, transcribe-tech.php
  with full en/no/uk/pl translations (3-engine cascade, diarization, vocab)
- New: translations/transcribe-about|guide|tech.php (4-lang strings)
- New: scripts/translate-pages.php (Azure gpt-4o CLI translation helper)
- Add korr-doc-links nav to transcribe.php
- Refresh redact-about|guide|tech.php — point to assets/images/redact/
- Fix all "never written to disk" wording in redact translations
- Add Min Sak/corpus save workflow to redact guide and tech privacy section
- redact.php upload hint: correct in-memory wording

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

transcribe.php

@@ -8,6 +8,14 @@ require_once __DIR__ . '/includes/layout.php';
 ?>
                 <form id="toolForm" class="tool-form">
 
+                    <div class="korr-doc-links">
+                        <a href="/transcribe-about.php" target="_blank">About this tool</a>
+                        <span aria-hidden="true">&middot;</span>
+                        <a href="/transcribe-guide.php" target="_blank">User guide</a>
+                        <span aria-hidden="true">&middot;</span>
+                        <a href="/transcribe-tech.php" target="_blank">How it works</a>
+                    </div>
+
                     <div class="lang-switcher" id="uiLangSwitcher" role="group" aria-label="UI language">
                         <button type="button" class="lang-btn is-active" data-lang="en">&#127468;&#127463; EN</button>
                         <button type="button" class="lang-btn" data-lang="no">&#127475;&#127476; NO</button>