Type safety: Explicitly specify types for Ok() returns

src-tauri/src/main.rs

@@ -635,10 +635,10 @@ fn main() {
                 .ok_or_else(|| "Could not locate project root or resource dir".to_string())?;
             for candidate in [resource_dir.join("_up_"), resource_dir.clone()] {
                 if candidate.join("generate_equirect.py").exists() {
-                    return Ok(candidate);
+                    return Ok::<PathBuf, String>(candidate);
                 }
             }
-            Ok(resource_dir)
+            Ok::<PathBuf, String>(resource_dir)
         })
         .unwrap_or_else(|_| PathBuf::from("."));