v3.36.0: a deliberate "insert the next card" cue for batch runs

The waiting phase is the only moment the operator must act, so it now:
- shows a card-into-reader SVG animation in the status modal (inline
  SVG, CSS keyframes in src/style.css; reduced-motion users get the
  static card-above-the-slot picture);
- plays a short Web Audio chime once per card, edge-triggered in the
  2 s poll so it never repeats (the AudioContext is unlocked by the
  Start click);
- sets the tab title to "Insert next card" while the window is hidden;
- offers a speaker toggle next to the status (persisted as
  simple_ram_batch_sound, on by default).

The prebuilt style.css was rebuilt: it had gone stale and lacked
utilities the UI already used (bg-blue-50 on the batch notice,
inline-flex, mx-2, max-h-48, w-44, min-w-24).

1022 Python + 1062 frontend green; simple-v470.

CHANGELOG.md

@@ -9,6 +9,25 @@ every change carries a descriptive commit message.
 
 ## [Unreleased]
 
+## [3.36.0] — 2026-10-23
+
+### Added
+
+- The batch **"waiting for the next card"** state is now a deliberate cue: the status
+  modal shows a card-into-reader animation next to the prompt, a short chime sounds
+  **once per card** when the run enters the waiting phase (Web Audio — no audio asset;
+  edge-triggered in the 2 s poll, so it does not repeat), and while the tab is hidden the
+  title hints "Insert next card".  The speaker button next to the status mutes the chime
+  and the choice is remembered (`simple_ram_batch_sound`); the chime is unlocked by the
+  Start click (browser autoplay policy); reduced-motion users get the static card-above-
+  the-slot picture.
+
+### Fixed
+
+- The prebuilt `style.css` had gone stale: a rebuild restored utility classes the UI
+  already used but the output lacked (e.g. `bg-blue-50` on the batch notice, `inline-flex`,
+  `mx-2`, `max-h-48`, `w-44`, `min-w-24`).
+
 ## [3.35.0] — 2026-10-23
 
 ### Added