v3.23.3: the low-counter notice polish

The two buttons under a cntr_low verdict shared the red warning style, and
the notice only ever rendered in the RAM pill: an SCP80 send wrote it into
the hidden RAM container, so the plain-send view showed the verdict text
but offered no way to act on it.

- The counter probe button is amber and the preset jump green (the warning
  text stays red).
- The probe renders the inline throbber the RAM operations use
  (animate-spin, no modal) while it runs; its result replaces it in the
  same box.
- Each pill carries its own notice box (#ram-cntr-low / #sp-cntr-low):
  ramShowCntrLow/ramSyncCounter target the originating view's box and
  clear the other, the SCP80 send passes 'sp' explicitly (it used to rely
  on the keyset-view heuristic), and a new send attempt clears the stale
  verdict (ramClearResults clears both boxes).
- The prebuilt Tailwind output was regenerated (npm run build):
  border-amber-300/-700 and border-emerald-300/-700 were absent from
  style.css (the stale-style trap).

Tests: the button classes, the spinner and the box targeting pinned in
ram.test.js.  846 frontend + 830 Python; sw cache simple-v416.

frontend/tests/ram_counter_flow.test.js

@@ -32,6 +32,7 @@ for (const fn of ['berLenStr', 'ramDeleteApdu', 'ramIncrementCntr', 'ramSaveCntr
 	'spPresetIdx', 'spPresetCounterValue', 'spCntrPlaceholder', 'spCntrAhead',
 	'ramHideProgress', 'ramDeleteFromExplorer',
 	'spCntrLow', 'ramCntrLowHtml', 'ramCntrLowPresetIdx', 'ramCntrLowView', 'ramShowCntrLow',
+	'ramCntrLowBox', 'ramCntrLowClear',
 	'escHtml', 'esc',
 	'spKeysetKvnOf', 'spKeysetList', 'spKeysetFor', 'spKeysetCheck',
 	'spKeysetOptionsHtml', 'cardsKeysetRowHtml', 'cardsKeysetRowsRender',