revert(auth): restore popup fallback — loopback failure cause unknown, investigate via logs

Author: BenGlut

package.json

@@ -1,6 +1,6 @@
 {
   "name": "tigertag-inventory",
-  "version": "1.7.7",
+  "version": "1.7.8",
   "description": "Tiger Studio Manager — desktop app",
   "main": "main.js",
   "engines": {

renderer/inventory.js

@@ -3125,17 +3125,12 @@ import { elgFanStep } from './printers/elegoo/widget_control.js';
         const r = await loopback();
         if (!r?.ok) {
           // Loopback failed (user closed the browser tab, network error, etc.).
-          // Do NOT fall back to signInWithPopup — the Electron popup cannot
-          // handle passkeys / Touch ID, and would leave the user stuck on the
-          // "Use your passkey" screen with no way forward.
-          // Instead, show an actionable error so the user can retry the
-          // loopback (reopen browser) or use email/password below.
-          console.warn("[auth.google] loopback failed:", r?.error);
-          toast($("addModalResult"), "bad",
-            "Google sign-in via browser failed — please try again or use email/password.",
-            { context: "auth.google.loopback" }
-          );
-          return; // exit the click handler — user stays on the login form
+          // Fall back to signInWithPopup — it may hit the passkey screen but
+          // the user can click "Try another method" → password to proceed.
+          console.warn("[auth.google] loopback failed, falling back to popup:", r?.error);
+          const provider = new firebase.auth.GoogleAuthProvider();
+          provider.setCustomParameters({ prompt: "select_account" });
+          result = await firebase.auth().signInWithPopup(provider);
         } else {
           // Build a Firebase credential from the tokens Google returned.
           // We pass BOTH idToken and accessToken: if the idToken's audience