debug: enable DevTools in release builds

Added devtools Cargo feature, auto-open DevTools on startup
so we can see frontend console errors on Windows.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src-tauri/Cargo.toml

@@ -11,7 +11,7 @@ crate-type = ["lib", "cdylib", "staticlib"]
 tauri-build = { version = "2", features = [] }
 
 [dependencies]
-tauri = { version = "2", features = [] }
+tauri = { version = "2", features = ["devtools"] }
 tauri-plugin-shell = "2"
 tauri-plugin-updater = "2"
 serde = { version = "1", features = ["derive"] }

src-tauri/src/lib.rs

@@ -151,6 +151,14 @@ pub fn run() {
     tauri::Builder::default()
         .plugin(tauri_plugin_shell::init())
         .manage(app_state)
+        .setup(|app| {
+            // Open DevTools in release builds for debugging
+            use tauri::Manager;
+            if let Some(window) = app.get_webview_window("main") {
+                window.open_devtools();
+            }
+            Ok(())
+        })
         .invoke_handler(tauri::generate_handler![
             commands::vault::is_first_run,
             commands::vault::create_vault,

src-tauri/tauri.conf.json

@@ -22,7 +22,8 @@
     ],
     "security": {
       "csp": null
-    }
+    },
+    "withGlobalTauri": true
   },
   "bundle": {
     "active": true,