fix(app): handle Windows paths in frontend file URL encoding (#12601)

packages/app/src/context/file/path.ts

@@ -81,7 +81,16 @@ export function decodeFilePath(input: string) {
 }
 
 export function encodeFilePath(filepath: string): string {
-  return filepath
+  // Normalize Windows paths: convert backslashes to forward slashes
+  let normalized = filepath.replace(/\\/g, "/")
+
+  // Handle Windows absolute paths (D:/path -> /D:/path for proper file:// URLs)
+  if (/^[A-Za-z]:/.test(normalized)) {
+    normalized = "/" + normalized
+  }
+
+  // Encode each path segment (preserving forward slashes as path separators)
+  return normalized
     .split("/")
     .map((segment) => encodeURIComponent(segment))
     .join("/")