fix: add missing uuid import in pdf_ops.py to resolve 500 error in merge and resize operations

routes/pdf_ops.py

@@ -1,4 +1,5 @@
 import os
+import uuid
 import fitz
 import base64
 from datetime import datetime
@@ -193,8 +194,11 @@ def print_pdfs():
         if os.path.exists(path):
             with fitz.open(path) as d:
                 if len(d) > 0:
-                    rect = d[0].rect
-                    d[0].insert_textbox(fitz.Rect(rect.width * 0.02, 0, rect.width * 0.98, rect.height * 0.05), f"Subject: {p['subject']}\nFilename: {p['filename']}", fontsize=5, fontname="Arial", fontfile="arial.ttf", color=(0, 0, 0), overlay=True, align=fitz.TEXT_ALIGN_CENTER)
+                    try:
+                        # Use insert_text which is simpler and less prone to font errors
+                        d[0].insert_text(fitz.Point(20, 15), f"Subject: {p['subject']} | File: {p['filename']}", fontsize=6, color=(0, 0, 0))
+                    except Exception as e:
+                        current_app.logger.error(f"Could not insert header for {p['filename']}: {e}")
                 merged.insert_pdf(d)
     tmp_name = f'printed_documents_{datetime.now().strftime("%Y%m%d%H%M%S")}.pdf'
     tmp_path = os.path.join(current_app.config['TEMP_FOLDER'], tmp_name)