Enable WebAuthn features and improve z-index layering

Adds early enabling of WebAuthn and platform authenticator features in Chromium via command line switches, and injects diagnostics to check availability in the renderer. CSS z-index values are increased for navigation and menu elements to ensure proper layering above <webview> surfaces. Updates Electron to 37.3.1 and expands site-history.json with additional authentication-related URLs.

package-lock.json

@@ -9,7 +9,7 @@
       "version": "1.0.0",
       "license": "ISC",
       "devDependencies": {
-        "electron": "^37.2.4",
+        "electron": "^37.3.1",
         "electron-builder": "^23.0.0",
         "electron-nightly": "^39.0.0-nightly.20250811"
       }
@@ -1387,9 +1387,9 @@
       }
     },
     "node_modules/electron": {
-      "version": "37.2.4",
-      "resolved": "https://registry.npmjs.org/electron/-/electron-37.2.4.tgz",
-      "integrity": "sha512-F1WDDvY60TpFwGyW+evNB5q0Em8PamcDTVIKB2NaiaKEbNC2Fabn8Wyxy5g+Anirr1K40eKGjfSJhWEUbI1TOw==",
+      "version": "37.3.1",
+      "resolved": "https://registry.npmjs.org/electron/-/electron-37.3.1.tgz",
+      "integrity": "sha512-7DhktRLqhe6OJh/Bo75bTI0puUYEmIwSzMinocgO63mx3MVjtIn2tYMzLmAleNIlud2htkjpsMG2zT4PiTCloA==",
       "dev": true,
       "hasInstallScript": true,
       "license": "MIT",