fix(linux): fix file explorer opening wrong directory (#4397) (#4777)

The pathToURI function was using url.PathEscape which incorrectly
escapes forward slashes (/ -> %2F). This caused file URIs like:

  /home/angaz -> file://%2Fhome%2Fangaz (broken)

File managers couldn't parse these malformed URIs correctly, causing
them to open the wrong directory (often a parent directory).

Fixed by using url.URL struct to properly construct file URIs:

  /home/angaz -> file:///home/angaz (correct)

Spaces and other special characters are still properly escaped.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

v3/UNRELEASED_CHANGELOG.md

@@ -26,6 +26,7 @@ After processing, the content will be moved to the main changelog and this file
 - Fix window menu crash on Wayland caused by appmenu-gtk-module accessing unrealized window (#4769) by @leaanthony
 - Fix GTK application crash when app name contains invalid characters (spaces, parentheses, etc.) by @leaanthony
 - Fix "not enough memory" error when initializing drag and drop on Windows (#4701) by @overlordtm
+- Fix file explorer opening wrong directory on Linux due to incorrect URI escaping (#4397) by @leaanthony
 - Fix AppImage build failure on modern Linux distributions (Arch, Fedora 39+, Ubuntu 24.04+) by auto-detecting `.relr.dyn` ELF sections and disabling stripping (#4642) by @leaanthony
 <!-- Bug fixes -->
 

v3/internal/fileexplorer/fileexplorer_linux.go

@@ -86,7 +86,14 @@ func pathToURI(path string) string {
 	if err != nil {
 		return path
 	}
-	return "file://" + url.PathEscape(absPath)
+	// Use url.URL to properly construct file URIs.
+	// url.PathEscape incorrectly escapes forward slashes (/ -> %2F),
+	// which breaks file manager path parsing.
+	u := &url.URL{
+		Scheme: "file",
+		Path:   absPath,
+	}
+	return u.String()
 }
 
 func findDesktopFile(xdgFileName string) (string, error) {