Fix EMF argument handling to preserve existing args

- Change from assignment to append for inputArgs and outputArgs in EMF handling
- Addresses Sourcery AI feedback about potential argument override
- Ensures compatibility with other file type conversions (e.g., SVG)

Author: gingeekrishna

src/converters/imagemagick.ts

@@ -463,8 +463,8 @@ export function convert(
   // Handle EMF files specifically to avoid LibreOffice delegate issues
   if (fileType === "emf") {
     // Use direct conversion without delegates for EMF files
-    inputArgs = ["-define", "emf:delegate=false", "-density", "300"];
-    outputArgs = ["-background", "white", "-alpha", "remove"];
+    inputArgs.push("-define", "emf:delegate=false", "-density", "300");
+    outputArgs.push("-background", "white", "-alpha", "remove");
   }
 
   return new Promise((resolve, reject) => {