fix: better cache folder detection with nested subfolder support

- Now checks 2 levels deep for TGA files (handles version subfolders like 19.3.2.201024)
- convert_cache_folder now uses rglob to find TGA files in all subfolders
- Will auto-detect the version folder in ProgramData

modules/tga_converter.py

@@ -88,18 +88,32 @@ class TGAConverter:
         """
         # Check default locations
         for path in self.DEFAULT_CACHE_PATHS:
-            if path.exists():
-                # Check if this folder directly contains .tga files
-                if list(path.glob("*.tga")):
-                    logger.info(f"Found cache folder: {path}")
-                    self._cache_path = path
-                    return path
-                # Check for subfolders (version folders like "19.3.2.201024")
-                for subfolder in path.iterdir():
-                    if subfolder.is_dir() and list(subfolder.glob("*.tga")):
-                        logger.info(f"Found cache subfolder: {subfolder}")
-                        self._cache_path = subfolder
-                        return subfolder
+            if not path.exists():
+                continue
+                
+            # Check if this folder directly contains .tga files
+            if list(path.glob("*.tga")):
+                logger.info(f"Found cache folder: {path}")
+                self._cache_path = path
+                return path
+            
+            # Check for subfolders (version folders like "19.3.2.201024")
+            for subfolder in path.iterdir():
+                if not subfolder.is_dir():
+                    continue
+                    
+                # Check if subfolder contains .tga files
+                if list(subfolder.glob("*.tga")):
+                    logger.info(f"Found cache subfolder: {subfolder}")
+                    self._cache_path = subfolder
+                    return subfolder
+                    
+                # Check one level deeper (in case of nested structure)
+                for nested in subfolder.iterdir():
+                    if nested.is_dir() and list(nested.glob("*.tga")):
+                        logger.info(f"Found cache nested folder: {nested}")
+                        self._cache_path = nested
+                        return nested
         
         # Try to find by looking for .tga files
         logger.info("Searching for .tga files...")
@@ -373,8 +387,8 @@ class TGAConverter:
             logger.error("Cache folder not found")
             return results
         
-        # Find all TGA files
-        tga_files = list(cache_path.glob("*.tga"))
+        # Find all TGA files (including in subfolders)
+        tga_files = list(cache_path.rglob("*.tga"))
         
         if not tga_files:
             logger.warning(f"No .tga files found in: {cache_path}")