v3.28.1: the batch panel polish

- A throbber (#ram-batch-spin) next to the phase line shows while a card
  is actually being installed (active && current - the stopping-mid-
  install phase included) and hides again while waiting.
- The waiting prompt is explicit now: "Insert next card. Waiting for a
  card..." (RU "Вставьте следующую карту. Ожидание карты…"); the old
  "Waiting for a card..." key is gone.
- The notice reports only the last *finished* card: starting the next
  card's install clears it (state['notice'] = '' alongside
  current/installing in _ram_batch_handle_card), so the previous card's
  verdict never lingers over the next install.  It stays visible while
  waiting - the "report the status + ask for the next card" behavior.
- The batch operation's RU label is "Пакетная установка (.cap на
  множество карт)"; the help row's title aligned.

Tests: the render test (the new prompt, the throbber visible while
installing / stopping-mid-install and hidden while waiting, an empty
notice hiding the box) and the worker test (the notice is empty
mid-install and set again for the new outcome).  915 frontend + 925
Python; sw cache simple-v439.

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "pysim-simple-server"
-version = "3.28.0"
+version = "3.28.1"
 description = "HTTP REST server wrapping pysim for the SIMple PWA"
 requires-python = ">=3.8"
 # pysim is a git-only dependency installed explicitly by setup.bat/setup.sh.