Merge branch 'dev' into feature/install-page

# Conflicts:
#	backend/bot/app/web/admin_api_impl/settings.py
#	backend/bot/app/web/webapp/cache_helpers.py
#	frontend/src/admin/sections/SettingsSection.svelte
#	tests/test_admin_settings_manifest_i18n.py

frontend/src/App.svelte

@@ -200,7 +200,7 @@
     showLogin,
     telegramSdk,
     getTg: () => tg,
-    telegramOAuthClientId,
+    telegramOAuthClientId: () => telegramOAuthClientId,
     currentLang: () => currentLang,
     normalizeLangCode,
     updateLocalData: (updatedLanguage) => {
@@ -405,6 +405,7 @@
   $: telegramOAuthClientId = Number(CFG.telegramOAuthClientId || telegramLoginBotId || 0);
   $: telegramMiniAppInitData = tg?.initData || readTelegramMiniAppInitDataFromLocation();
   $: telegramMiniAppAuthAvailable = Boolean(telegramMiniAppInitData);
+  $: telegramMiniAppContext = hasTelegramLaunchParams();
   $: telegramLoginUnavailable =
     !telegramMiniAppAuthAvailable && !telegramOAuthClientId && telegramSdkStatus !== "loading";
   $: telegramLoginChecking =
@@ -660,7 +661,10 @@
       link.rel = "stylesheet";
       link.href = href;
       link.onload = () => resolve();
-      link.onerror = () => reject(new Error(`stylesheet_load_failed:${href}`));
+      link.onerror = () => {
+        link.remove();
+        reject(new Error(`stylesheet_load_failed:${href}`));
+      };
       document.head.appendChild(link);
     });
   }
@@ -673,11 +677,34 @@
       script.src = src;
       script.async = true;
       script.onload = () => resolve();
-      script.onerror = () => reject(new Error(`script_load_failed:${src}`));
+      script.onerror = () => {
+        script.remove();
+        reject(new Error(`script_load_failed:${src}`));
+      };
       document.head.appendChild(script);
     });
   }
 
+  async function appendStylesheetWithFallback(id, href, fallbackName) {
+    const fallbackHref = resolveWebappAssetPath("", fallbackName);
+    try {
+      await appendStylesheetOnce(id, href);
+    } catch (error) {
+      if (!fallbackHref || href === fallbackHref) throw error;
+      await appendStylesheetOnce(id, fallbackHref);
+    }
+  }
+
+  async function appendScriptWithFallback(id, src, fallbackName) {
+    const fallbackSrc = resolveWebappAssetPath("", fallbackName);
+    try {
+      await appendScriptOnce(id, src);
+    } catch (error) {
+      if (!fallbackSrc || src === fallbackSrc) throw error;
+      await appendScriptOnce(id, fallbackSrc);
+    }
+  }
+
   function readAdminBundleApi() {
     const bundle = window.SubscriptionWebAppAdmin;
     return bundle?.mount ? bundle : null;
@@ -697,8 +724,16 @@
     adminBundlePromise = (async () => {
       const cssHref = resolveWebappAssetPath(CFG.adminCssAsset, "subscription_webapp_admin.css");
       const jsSrc = resolveWebappAssetPath(CFG.adminJsAsset, "subscription_webapp_admin.js");
-      await appendStylesheetOnce("subscription-webapp-admin-css", cssHref);
-      await appendScriptOnce("subscription-webapp-admin-js", jsSrc);
+      await appendStylesheetWithFallback(
+        "subscription-webapp-admin-css",
+        cssHref,
+        "subscription_webapp_admin.css",
+      );
+      await appendScriptWithFallback(
+        "subscription-webapp-admin-js",
+        jsSrc,
+        "subscription_webapp_admin.js",
+      );
       const loaded = readAdminBundleApi();
       if (!loaded) throw new Error("admin_bundle_missing_mount");
       adminBundleApi = loaded;
@@ -1513,7 +1548,9 @@
                 {user}
                 {userAgreementUrl}
                 {userLanguage}
-                linkTelegramAccount={accountStore.linkTelegramAccount}
+                showLogout={!telegramMiniAppContext}
+                linkTelegramAccount={() =>
+                  accountStore.linkTelegramAccount(() => telegramMiniAppInitData)}
                 logout={accountStore.logout}
                 {openAdminPanel}
                 {openExternalLink}