v0.319.0: the export panel says „Exportálás" and its inputs use the dashboard's style

Seen in the browser check on demo-hp (rc.1): a page-style title with the app name inside a data section,
and a white select + password box. Two parity fixtures re-captured (app_data_deployed, app_data_export).

Claude-Session: https://claude.ai/code/session_012qRErfCoiTkvDK9N5XHbzb

CHANGELOG.md

@@ -20,7 +20,8 @@
   select, no „Automatikusan generált értékek" block. The read-only hint sits under the title; the storage is a row
   „Tárhely: <név>"; the other install answers and generated keys are rows (keys keep their eye).
 - Guide: the screenshots are a panel that hides itself when no screenshot loads; the missing-guide line is a panel. Data:
-  the export's progress and done boxes are panels. Logs: the log box is one panel.
+  the export's progress and done boxes are panels, its title is „Exportálás" (no app name — the tab says which app), and its
+  drive select and password box use the dashboard's input style (they were white). Logs: the log box is one panel.
 - `/apps/{slug}/install` opened for an INSTALLED app still renders the install form read-only with its secret guards;
   two parity cases now render it (`deploy_installed`, `deploy_installed_restored`).
 - Tests red-proved: `app_page_tuning_test.go` (TestAppPage_LoginPairPanel, _NoStoredValueShowsSentence,