fix(tauri): use nvm current bin in PATH; avoid double browser navigate

Replace hardcoded nvm version path with ~/.nvm/current/bin so PATH
augmentation follows the active nvm default. Have ensure_browser
return whether it created the webview and skip navigate() when it did,
since WebviewUrl::External already loads the initial URL once.

Author: cursoragent

native/macos/comux-tauri/src-tauri/src/lib.rs

@@ -246,9 +246,9 @@ fn ensure_browser(
     w: f64,
     h: f64,
     url: &str,
-) -> Result<(), String> {
+) -> Result<bool, String> {
     if app.webviews().keys().any(|existing| existing == label) {
-        return Ok(());
+        return Ok(false);
     }
 
     let main = app
@@ -318,7 +318,7 @@ fn ensure_browser(
     )
     .map_err(|e| e.to_string())?;
 
-    Ok(())
+    Ok(true)
 }
 
 fn hide_webview(webview: &tauri::Webview) -> Result<(), String> {
@@ -342,12 +342,14 @@ fn browser_navigate(
     h: f64,
 ) -> Result<(), String> {
     let label = safe_browser_label(label);
-    ensure_browser(&app, &label, x, y, w, h, &url)?;
-    let webview = app
-        .get_webview(&label)
-        .ok_or_else(|| "browser webview missing".to_string())?;
-    let parsed_url = Url::parse(&url).map_err(|e| e.to_string())?;
-    webview.navigate(parsed_url).map_err(|e| e.to_string())?;
+    let created = ensure_browser(&app, &label, x, y, w, h, &url)?;
+    if !created {
+        let webview = app
+            .get_webview(&label)
+            .ok_or_else(|| "browser webview missing".to_string())?;
+        let parsed_url = Url::parse(&url).map_err(|e| e.to_string())?;
+        webview.navigate(parsed_url).map_err(|e| e.to_string())?;
+    }
     Ok(())
 }
 
@@ -734,7 +736,7 @@ fn augmented_path() -> String {
         for suffix in [
             ".cargo/bin",
             ".local/bin",
-            ".nvm/versions/node/v24.13.0/bin",
+            ".nvm/current/bin",
             ".volta/bin",
             ".bun/bin",
             ".rbenv/shims",