fix: Remove trailing comma in generaPDFInterno function

Fixed JavaScript syntax error:
- Removed extra comma after generaPDFInterno() closing brace (line 2679)
- Error: 'missing : in conditional expression' at line 2681:30

The comma was causing the parser to expect another property in the
object literal, but instead found the closing brace.

Before: },    (extra comma caused syntax error)
After:  }     (correct - last method in object)

project-mode.html

@@ -2677,7 +2677,7 @@
                                         "PDF Interno generato con successo!",
                                         "success",
                                     );
-                                },
+                                }
                             };
                         }
         </script>