Aero music: start without a tap on the player

"It should play by default when the Frutiger theme loads in." The embed URL
now carries auto_play=true as a second try alongside the immediate play()
call, and when the browser still refuses (a reload carries no gesture), the
retry rides the next pointerdown/keydown anywhere OUTSIDE the player - the
first tap on anything starts the music. A 700ms throttle keeps a flurry of
taps from skipping through the set, taps on the player's own controls are
left to their handlers (no blip on the x), and an explicit pause or dismiss
is respected: no later gesture undoes it. Looking at the player (expanding
the circle) starts a still-pending soundtrack too.

aero-music-test simulates the refusal (__scAllowPlay) and pins all three
paths: one attempt anyway, the next tap starts it, an explicit pause stays.
28 checks. Version 0.7.1, SW v93.

public/sw.js

@@ -9,7 +9,7 @@
  *
  * Bumping CACHE_VERSION is how a new deploy invalidates old assets.
  */
-const CACHE_VERSION = "freezmo-v92";
+const CACHE_VERSION = "freezmo-v93";
 const SHELL_CACHE = `${CACHE_VERSION}-shell`;
 const ASSET_CACHE = `${CACHE_VERSION}-assets`;