v4.3 ui: 3D wooden bookshelf redesign, fix player cover aspect ratio, and smooth subtitle scroll

routes/pdf_routes.py

@@ -6,6 +6,8 @@ from flask import Blueprint, request, jsonify
 from db import get_db
 from pdf_processor import process_pdf_to_markdown
 from ai_processor import process_document_smartly
+from thumbnail_generator import generate_pdf_thumbnail
+from media_storage import save_pending_thumbnail
 from auth import login_required
 
 pdf_bp = Blueprint('pdf', __name__)
@@ -35,6 +37,20 @@ def upload_pdf():
         # --- AI Powered Smart Reconstruction & Section Tagging ---
         smart_blocks = process_document_smartly(result['markdown_blocks'], result['metadata'])
         
+        # --- v4.4: প্রথম পেজ থেকে অটো থাম্বনেইল জেনারেট ---
+        pending_thumbnail = None
+        pending_thumbnail_format = None
+        try:
+            thumb_bytes, thumb_fmt = generate_pdf_thumbnail(pdf_bytes)
+            if thumb_bytes:
+                token = save_pending_thumbnail(thumb_bytes, thumb_fmt)
+                if token:
+                    pending_thumbnail = token
+                    pending_thumbnail_format = thumb_fmt
+                    print(f"  🖼️ Auto-thumbnail generated: {token} ({len(thumb_bytes)} bytes)")
+        except Exception as te:
+            print(f"  ⚠️ Thumbnail step skipped: {te}")
+        
         # Save PDF document record
         db = get_db()
         cursor = db.cursor()
@@ -59,7 +75,9 @@ def upload_pdf():
             'filename': pdf_file.filename,
             'page_count': result['page_count'],
             'metadata': result['metadata'],
-            'blocks': smart_blocks
+            'blocks': smart_blocks,
+            'pending_thumbnail': pending_thumbnail,
+            'pending_thumbnail_format': pending_thumbnail_format
         })
         
     except Exception as e: