The global -webkit-tap-highlight-color on #app was not enough on Android
in-app WebViews (Telegram, VK): they only suppress the selection-like tap
flash when -webkit-user-select / -webkit-tap-highlight-color /
-webkit-touch-callout sit DIRECTLY on the tapped element, not inherited.
Set them on the two tappable header controls — the title (a 10-tap debug
target) and the back chevron.
- Tap-highlight: add -webkit-tap-highlight-color: transparent on #app.
Android in-app WebViews (Telegram, VK) flashed a momentary selection-like
box on tappable nodes on tap — seen on the header title and the back
chevron; user-select (already none) does not govern it. Inherited, so
this clears it app-wide.
- VK haptics: mirror the Telegram haptic set on VK via VK Bridge taptic
(impact / notification / selection), routed through a new shared
lib/haptics.ts dispatcher. VK users previously got no haptics; the game
and error call sites now fire haptic() instead of telegramHaptic().
- VK swipe-back: disable VK's horizontal swipe-back at launch
(VKWebAppSetSwipeSettings history:false) so it does not fight the app's
own edge-swipe-back and on-board tile drag — parity with Telegram's
disabled vertical swipes; the app owns navigation via its back chevron.
Docs: UI_DESIGN (no-select / tap-highlight, VK integration).
Ilia Denisov