fix: update tv .nfo handling

updated TV .nfo handling

core/nfo_manager.py

@@ -439,17 +439,40 @@ class NFOManager:
                     if existing_long_nfo and source_nfo_path == existing_long_nfo:
                         old_nfo_to_delete = existing_long_nfo
                         print(f"📦 Migrating episode NFO: {existing_long_nfo.name} -> {episode_filename}")
+                        
+                        # Show what content fields are being preserved
+                        content_fields = ["title", "plot", "runtime", "premiered"]
+                        preserved_content = []
+                        for field in content_fields:
+                            elem = episode.find(field)
+                            if elem is not None and elem.text:
+                                preserved_content.append(field)
+                        if preserved_content:
+                            print(f"   📄 Preserving content: {', '.join(preserved_content)}")
                     
-                    # Remove existing NFOGuard-managed elements to avoid duplicates
-                    # These will be re-added at the bottom
+                    # Preserve existing content fields and store NFOGuard-managed fields for re-adding
+                    preserved_values = {}
+                    
+                    # Extract and preserve NFOGuard-managed fields (we'll re-add these at the bottom)
                     nfoguard_fields = ["aired", "dateadded", "lockdata", "season", "episode"]
                     for tag in nfoguard_fields:
                         existing = episode.find(tag)
                         if existing is not None:
-                            # Store the aired value before removing
+                            # Store the value before removing
                             if tag == "aired" and not aired:
                                 aired = existing.text  # Preserve existing aired date
+                            preserved_values[tag] = existing.text
                             episode.remove(existing)
+                    
+                    # Important: DO NOT remove content fields like title, plot, runtime, premiered, etc.
+                    # These should be preserved from the long-named NFO files
+                    
+                    # Debug: Show what fields are preserved after removing NFOGuard fields
+                    preserved_fields = [elem.tag for elem in episode]
+                    if preserved_fields:
+                        print(f"   🔍 Content preserved after cleanup: {', '.join(preserved_fields)}")
+                    else:
+                        print(f"   ⚠️  No content fields found after cleanup!")
                         
                 except (ET.ParseError, ValueError) as e:
                     print(f"⚠️  Corrupted episode NFO detected: {nfo_path} - {str(e)[:100]}...")
@@ -459,7 +482,7 @@ class NFOManager:
                 # Create new NFO structure
                 episode = ET.Element("episodedetails")
             
-            # Enhanced metadata should be preserved - only add if not already present
+            # Add enhanced metadata only if not already present (preserve existing from long-named NFO)
             if enhanced_metadata:
                 if enhanced_metadata.get("title") and not episode.find("title"):
                     title_elem = ET.SubElement(episode, "title")