feat: OIDC sign-in, titlebar account menu, gateway-backed AI credits (v1.44.0)

Replaces the app's self-contained auth/billing stack with Impertio
Accounts OIDC. All user identity, plan subscriptions, and credit
balances now live on account.impertio.app — the desktop app's only job
is to sign the user in via Authorization Code + PKCE and attach the
resulting access token to /v1/chat calls.

Rust (src-tauri):
- auth.rs — new OIDC module: PKCE loopback on 127.0.0.1:53683, tokens
  persisted via tauri-plugin-store, /oauth/userinfo proxy for plan +
  credits. Commands: auth_login, auth_logout, auth_current_user,
  auth_get_access_token, auth_userinfo, auth_is_configured.
- Cargo.toml — added oauth2, tiny_http, url, tokio (sync), and
  tauri-plugin-store.
- capabilities/default.json — added store:default.
- lib.rs — registers the store plugin + the 6 auth commands.

Frontend:
- js/services/ai-api.js rewritten: no more register/login/refresh/me/
  billing/usage endpoints; token comes from Rust via
  invoke('auth_get_access_token'). Chat API surface unchanged.
- js/solid/stores/aiStore.js rewritten: login() triggers the OIDC
  browser flow; refreshUserData() pulls /oauth/userinfo for plan +
  credits. New requireSignIn() helper for gated actions.
- AILoginDialog.jsx + AIPlanDialog.jsx deleted. All callers now
  go through requireSignIn() which kicks off the browser OIDC flow
  when the user isn't signed in yet.
- AccountDropdown.jsx rewritten: signed-out = single sign-in button;
  signed-in = avatar, name + email, plan badge, credits count with
  reset date, Manage account link (to account.impertio.app/billing),
  Upgrade link (for free tier, to .../pricing), Sign out.
- js/types/ai.ts — types now match the /userinfo response shape
  (subscription.tier + credits.total/monthly/topup/resets_at).

i18n:
- 7 new keys (credits, creditsResetsAt, planFree/Pro/Studio, upgrade,
  manageAccount) added to all 39 locales via scripts/_add_oidc_i18n.py.
  English defaults for locales without native strings.

Version bump 1.43.0 -> 1.44.0 (package.json, Cargo.toml, tauri.conf.json).

Author: mojtabakarimi

open-pdf-studio/js/bridge.ts

@@ -252,6 +252,7 @@ export {
   setAiPanelVisible,
   isAuthenticated as aiIsAuthenticated,
   user as aiUser,
+  info as aiInfo,
   usage as aiUsage,
   subscription as aiSubscription,
   messages as aiMessages,
@@ -260,6 +261,6 @@ export {
   sendChat as aiSendChat,
   clearChat as aiClearChat,
   login as aiLogin,
-  register as aiRegister,
   logout as aiLogout,
+  requireSignIn as aiRequireSignIn,
 } from './solid/stores/aiStore.js';

open-pdf-studio/js/i18n/locales/ar/ribbon.json

@@ -61,7 +61,14 @@
     "expand": "Expand",
     "pinToSide": "Pin to side",
     "unpin": "Unpin",
-    "copy": "Copy"
+    "copy": "Copy",
+    "credits": "رصيد",
+    "creditsResetsAt": "إعادة تعيين {{date}}",
+    "planFree": "مجاني",
+    "planPro": "Pro",
+    "planStudio": "Studio",
+    "upgrade": "ترقية",
+    "manageAccount": "إدارة الحساب"
   },
   "measure": {
     "scale": "Scale",

open-pdf-studio/js/i18n/locales/bg/ribbon.json

@@ -61,7 +61,14 @@
     "expand": "Expand",
     "pinToSide": "Pin to side",
     "unpin": "Unpin",
-    "copy": "Copy"
+    "copy": "Copy",
+    "credits": "кредити",
+    "creditsResetsAt": "Нулиране {{date}}",
+    "planFree": "Безплатен",
+    "planPro": "Pro",
+    "planStudio": "Studio",
+    "upgrade": "Надстройте",
+    "manageAccount": "Управление на акаунта"
   },
   "measure": {
     "scale": "Scale",

open-pdf-studio/js/i18n/locales/bn/ribbon.json

@@ -61,7 +61,14 @@
     "expand": "Expand",
     "pinToSide": "Pin to side",
     "unpin": "Unpin",
-    "copy": "Copy"
+    "copy": "Copy",
+    "credits": "ক্রেডিট",
+    "creditsResetsAt": "{{date}} এ রিসেট",
+    "planFree": "ফ্রি",
+    "planPro": "Pro",
+    "planStudio": "Studio",
+    "upgrade": "আপগ্রেড",
+    "manageAccount": "অ্যাকাউন্ট পরিচালনা"
   },
   "measure": {
     "scale": "Scale",

open-pdf-studio/js/i18n/locales/ca/ribbon.json

@@ -61,7 +61,14 @@
     "expand": "Expand",
     "pinToSide": "Pin to side",
     "unpin": "Unpin",
-    "copy": "Copy"
+    "copy": "Copy",
+    "credits": "crèdits",
+    "creditsResetsAt": "Es reinicia el {{date}}",
+    "planFree": "Gratuït",
+    "planPro": "Pro",
+    "planStudio": "Studio",
+    "upgrade": "Millorar",
+    "manageAccount": "Gestiona el compte"
   },
   "measure": {
     "scale": "Scale",

open-pdf-studio/js/i18n/locales/cs/ribbon.json

@@ -61,7 +61,14 @@
     "expand": "Expand",
     "pinToSide": "Pin to side",
     "unpin": "Unpin",
-    "copy": "Copy"
+    "copy": "Copy",
+    "credits": "kredity",
+    "creditsResetsAt": "Obnovení {{date}}",
+    "planFree": "Zdarma",
+    "planPro": "Pro",
+    "planStudio": "Studio",
+    "upgrade": "Upgradovat",
+    "manageAccount": "Spravovat účet"
   },
   "measure": {
     "scale": "Scale",

open-pdf-studio/js/i18n/locales/da/ribbon.json

@@ -61,7 +61,14 @@
     "expand": "Expand",
     "pinToSide": "Pin to side",
     "unpin": "Unpin",
-    "copy": "Copy"
+    "copy": "Copy",
+    "credits": "kreditter",
+    "creditsResetsAt": "Nulstilles {{date}}",
+    "planFree": "Gratis",
+    "planPro": "Pro",
+    "planStudio": "Studio",
+    "upgrade": "Opgrader",
+    "manageAccount": "Administrer konto"
   },
   "measure": {
     "scale": "Scale",

open-pdf-studio/js/i18n/locales/de/ribbon.json

@@ -61,7 +61,14 @@
     "expand": "Expand",
     "pinToSide": "Pin to side",
     "unpin": "Unpin",
-    "copy": "Copy"
+    "copy": "Copy",
+    "credits": "Credits",
+    "creditsResetsAt": "Zurückgesetzt am {{date}}",
+    "planFree": "Kostenlos",
+    "planPro": "Pro",
+    "planStudio": "Studio",
+    "upgrade": "Upgrade",
+    "manageAccount": "Konto verwalten"
   },
   "measure": {
     "scale": "Scale",

open-pdf-studio/js/i18n/locales/el/ribbon.json

@@ -61,7 +61,14 @@
     "expand": "Expand",
     "pinToSide": "Pin to side",
     "unpin": "Unpin",
-    "copy": "Copy"
+    "copy": "Copy",
+    "credits": "πιστώσεις",
+    "creditsResetsAt": "Επαναφορά {{date}}",
+    "planFree": "Δωρεάν",
+    "planPro": "Pro",
+    "planStudio": "Studio",
+    "upgrade": "Αναβάθμιση",
+    "manageAccount": "Διαχείριση λογαριασμού"
   },
   "measure": {
     "scale": "Scale",

open-pdf-studio/js/i18n/locales/en/ribbon.json

@@ -66,7 +66,14 @@
     "expand": "Expand",
     "pinToSide": "Pin to side",
     "unpin": "Unpin",
-    "copy": "Copy"
+    "copy": "Copy",
+    "credits": "credits",
+    "creditsResetsAt": "Resets {{date}}",
+    "planFree": "Free",
+    "planPro": "Pro",
+    "planStudio": "Studio",
+    "upgrade": "Upgrade",
+    "manageAccount": "Manage account"
   },
   "measure": {
     "scale": "Scale",