ui: print the equipped card's ICCID in the header indicator (v2.5.2)

- new #state-indicator-iccid span between the card image and the ADM badge;
  shows the EF.ICCID digits of the equipped card (hidden without a card
  session or when the ICCID is unreadable, cleared when the server is lost)
- pysimUpdateIccidIndicator() mirrors the ADM badge pattern (no rewrite when
  the value is unchanged); wired into pysimCardStateUpdate() and
  pysimSetServerAvailable()
- indicator/card_state tests for show/hide and markup order;
  SW cache simple-v197

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "pysim-simple-server"
-version = "2.5.1"
+version = "2.5.2"
 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.