fixing the gradio_pdf issue

.claude/settings.local.json

@@ -0,0 +1,12 @@
+{
+  "permissions": {
+    "allow": [
+      "Read(//Users/jbilcke/Projects/comic_or_story_generation/gradio-pdf/backend/gradio_pdf/**)",
+      "Read(//Users/jbilcke/Projects/comic_or_story_generation/gradio-pdf/frontend/**)",
+      "Read(//Users/jbilcke/Projects/comic_or_story_generation/gradio-pdf/**)",
+      "Bash(python -m gradio:*)"
+    ],
+    "deny": [],
+    "ask": []
+  }
+}

app.py

@@ -779,10 +779,15 @@ def create_multi_page_pdf(session_manager: SessionManager) -> str:
         for page in page_pdf_reader.pages:
             pdf_writer.add_page(page)
 
-    # Write to file
+    # Write to file with explicit flushing
     pdf_path = session_manager.pdf_path
     with open(pdf_path, 'wb') as f:
         pdf_writer.write(f)
+        f.flush()  # Flush Python's internal buffer
+        os.fsync(f.fileno())  # Ensure OS writes to disk
+
+    # Small delay to ensure file system catches up
+    time.sleep(0.1)
 
     return str(pdf_path)
 
@@ -1164,7 +1169,15 @@ with gr.Blocks(css=css) as demo:
 
             # Right column - PDF Preview
             with gr.Column(scale=2):
-                pdf_preview = PDF(label="PDF Preview", show_label=True, height=900, elem_id="pdf-preview")
+                pdf_preview = PDF(
+                    label="PDF Preview",
+                    show_label=True,
+                    height=900,
+                    elem_id="pdf-preview",
+                    enable_zoom=True,
+                    min_zoom=1.0,
+                    max_zoom=3.0
+                )
 
         # Add interaction to show/hide custom style text field
         def toggle_custom_style(style_value):