fix: show telegram login without email auth

frontend/src/webapp/auth/AuthScreen.svelte

@@ -45,7 +45,8 @@
 
   let authPanelHeight = 0;
 
-  $: passwordModeActive = Boolean(passwordLoginMode && CFG.emailAuthEnabled !== false);
+  $: emailAuthEnabled = CFG.emailAuthEnabled !== false;
+  $: passwordModeActive = Boolean(passwordLoginMode && emailAuthEnabled);
   $: authCardHeight = authPanelHeight ? `${authPanelHeight}px` : undefined;
 </script>
 
@@ -149,7 +150,8 @@
                   {authStatus}
                 </StatusMessage>
               {/if}
-            {:else if CFG.emailAuthEnabled !== false}
+            {:else}
+              {#if emailAuthEnabled}
                 <div class="auth-pane">
                   <div class="auth-email-stack">
                     <div class="field-error-wrap">
@@ -189,6 +191,7 @@
                   </div>
                 </div>
                 <div class="or-line"><span></span>{t("wa_or")}<span></span></div>
+              {/if}
               <div class="auth-pane">
                 <Button
                   variant="telegram"
@@ -207,6 +210,7 @@
                   </span>
                 </Button>
               </div>
+              {#if emailAuthEnabled}
                 <div class="password-switch-stack">
                   <div class="password-switch-divider" aria-hidden="true"></div>
                   <button
@@ -219,6 +223,7 @@
                     {t("wa_login_use_password")}
                   </button>
                 </div>
+              {/if}
               {#if !telegramLoginChecking && (authStatus || telegramLoginUnavailableMessage)}
                 <StatusMessage
                   error={authIsError || Boolean(telegramLoginUnavailableMessage)}