ui: show the provider in the eSIM profile card title

The card title showed only the nickname or profile name ('0002'); with
the provider in front it reads 'Alfa 0002' and still prefers a user
nickname ('Alfa Work') when one is set.

- esimProfileTitle(): provider + (nickname || name), falling back to the
  ICCID and finally '?'.
- tests for the helper; help EN/RU and sw.js simple-v234.

frontend/sw.js

@@ -1,4 +1,4 @@
-const CACHE = 'simple-v233';
+const CACHE = 'simple-v234';
 const URLS = [
   'index.html',
   'help.html',