Error tests, FK violations fix

- ErrorHandler tests: 77 assertions covering FK extraction, normalization, dedup, edge cases. Fix FK table map for child tables.
- Fix FK violation: (int)null → 0 in createThesis for orientation/ap/finality/license FK columns. Add FK value logging to updateThesis.
- Add CURRENT_ISSUES.md with summary of FK violation, dev debugging, and tag dedup status for next conversation

app/templates/admin/edit.php

@@ -105,6 +105,14 @@
     // Languages — either from flash repopulation or current thesis data
     $formData['languages'] = $formData['languages'] ?? $currentLanguages ?? [];
 
+    // Tags — either from flash repopulation or current thesis data
+    $keywordsStr = $thesis['keywords'] ?? '';
+    $currentTags = $keywordsStr !== '' ? array_map('trim', explode(',', $keywordsStr)) : [];
+    // If formData has tag[], use that instead
+    if (!empty($formData['tag']) && is_array($formData['tag'])) {
+        $currentTags = $formData['tag'];
+    }
+
     // Formats — either from flash repopulation or current thesis data
     $checkedFormats = $formData['formats'] ?? $currentFormats ?? [];
     // Populate formData.formats for checkbox-list partial