Replace filepath.Join with path.Join for Windows compatibility

Replace all instances of filepath.Join with path.Join across the codebase
to improve Windows compatibility following the guidance from
https://github.com/golang/go/issues/44305.

Key changes:
- Replaced filepath.Join with path.Join in 14 files
- Updated import statements appropriately
- Resolved variable shadowing issues where function parameters
  named 'path' were conflicting with the path package
- Maintained filepath imports where needed for OS-specific functions
  like filepath.Walk, filepath.IsAbs, filepath.Dir, and filepath.Base

All tests pass, confirming the changes maintain functionality while
improving cross-platform compatibility.

1 files changed, 4 insertions, 4 deletions

diff --git a/hotline/file_path.go b/hotline/file_path.go
index f4a27cc..a3a13f1 100644
--- a/hotline/file_path.go
+++ b/hotline/file_path.go
@@ -7,7 +7,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"path/filepath"
+	"path"
 	"strings"
 )
 
@@ -112,13 +112,13 @@ func ReadPath(fileRoot string, filePath, fileName []byte) (fullPath string, err
 
 	var subPath string
 	for _, pathItem := range fp.Items {
-		subPath = filepath.Join("/", subPath, string(pathItem.Name))
+		subPath = path.Join("/", subPath, string(pathItem.Name))
 	}
 
-	fullPath = filepath.Join(
+	fullPath = path.Join(
 		fileRoot,
 		subPath,
-		filepath.Join("/", string(fileName)),
+		path.Join("/", string(fileName)),
 	)
 	fullPath, err = txtDecoder.String(fullPath)
 	if err != nil {