Add cross-platform file move utility for extraction

Introduced _move_file_cross_platform to handle file moves across drives, especially on Windows where rename may fail. Updated archive extraction logic to use this utility, ensuring robust file operations during extraction and conflict resolution.

src/tzst/core.py

@@ -87,6 +87,24 @@ def _get_unique_filename(file_path: Path) -> Path:
         counter += 1
 
 
+def _move_file_cross_platform(src: Path, dst: Path) -> None:
+    """Move a file from src to dst, handling cross-drive moves on Windows."""
+    try:
+        # Try the fast rename operation first
+        src.rename(dst)
+    except OSError as e:
+        # On Windows, rename fails across drives with error 17
+        # Fall back to copy + delete for cross-drive moves
+        import shutil
+
+        try:
+            shutil.copy2(src, dst)
+            src.unlink()
+        except Exception:
+            # If copy also fails, re-raise the original rename error
+            raise e from None
+
+
 def _handle_file_conflict(
     target_path: Path,
     resolution: ConflictResolution | str,
@@ -845,15 +863,14 @@ def extract_archive(
                         ):
                             continue
                         elif actual_resolution == ConflictResolution.EXIT:
-                            break
-
-                        # For AUTO_RENAME, we need to adjust the member path
+                            break  # For AUTO_RENAME, we need to adjust the member path
                         if actual_resolution in (
                             ConflictResolution.AUTO_RENAME,
                             ConflictResolution.AUTO_RENAME_ALL,
                         ):
                             # Create parent directories for renamed file
-                            final_path.parent.mkdir(parents=True, exist_ok=True)
+                            if final_path:
+                                final_path.parent.mkdir(parents=True, exist_ok=True)
                             # Extract to temporary location, then move
                             temp_extract_path = Path(tempfile.mkdtemp())
                             try:
@@ -861,7 +878,8 @@ def extract_archive(
                                     member, temp_extract_path, filter=filter
                                 )
                                 temp_file = temp_extract_path / member
-                                temp_file.rename(final_path)
+                                if final_path:
+                                    _move_file_cross_platform(temp_file, final_path)
                             finally:
                                 # Clean up temp directory
                                 import shutil
@@ -920,7 +938,7 @@ def extract_archive(
                                         target_path.unlink()  # Remove existing file
 
                             if target_path:
-                                temp_file.rename(target_path)
+                                _move_file_cross_platform(temp_file, target_path)
                 finally:
                     # Clean up temp directory
                     import shutil