fix: restore telegram mini app auth

tests/test_webapp_telegram_logout.py

@@ -0,0 +1,35 @@
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parents[1]
+
+
+def _read(path: str) -> str:
+    return (REPO_ROOT / path).read_text(encoding="utf-8")
+
+
+def test_telegram_init_data_login_runs_before_manual_logout_gate():
+    source = _read("frontend/src/lib/webapp/webappBoot.js")
+
+    init_data_pos = source.index("const initData = getInitDataForBoot();")
+    manual_logout_pos = source.index("if (isManuallyLoggedOut())")
+
+    assert init_data_pos < manual_logout_pos
+
+
+def test_logout_button_is_controlled_by_telegram_context():
+    app_source = _read("frontend/src/App.svelte")
+    settings_source = _read("frontend/src/webapp/screens/SettingsScreen.svelte")
+
+    assert "$: telegramMiniAppContext = hasTelegramLaunchParams();" in app_source
+    assert "showLogout={!telegramMiniAppContext}" in app_source
+    assert "export let showLogout = true;" in settings_source
+    assert "{#if showLogout}" in settings_source
+
+
+def test_logout_handler_is_noop_inside_telegram_mini_app():
+    source = _read("frontend/src/lib/webapp/stores/accountStore.js")
+
+    guard_pos = source.index("if (telegramSdk.hasLaunchParams()) return;")
+    mark_logout_pos = source.index("markManualLogout();")
+
+    assert guard_pos < mark_logout_pos