correct folder and image names in zip, correct zip file name

app.py

@@ -34,6 +34,7 @@ def index():
             'NIV': 'niv',
             'NLT': 'nlt'
         }.get(version)
+        filenameref = reference.replace(' ', '_').replace(':', '_')
 
         if bible_id and reference:
             webfriendlyref=reference.replace(' ','%20').replace(':','%3A')
@@ -87,7 +88,7 @@ def index():
 
                 # You can now send png_bytes to a response or store it in a DB
                 print(f"Page {page_index} is {len(png_bytes)} bytes.")
-                zf.writestr("SLIDES/{:04d}.png".format(page_index), png_bytes)
+                zf.writestr("{}/{}{:04d}.png".format(filenameref, filenameref, page_index), png_bytes)
 
         doc.close()
 
@@ -100,7 +101,7 @@ def index():
             memory_file,
             mimetype='application/zip',
             as_attachment=True,
-            download_name='downloaded_files.zip'  # Use download_name for modern Flask versions
+            download_name='{}.zip'.format(filenameref)  # Use download_name for modern Flask versions
         )
 
         print(f"Reference: {reference}, Version: {version}, Text: {verse_text}, Error: {error}")