Swipe in from the side edge to change pages on the Guition (0.2.29)

Page swipes were an LVGL gesture anywhere on the screen: 50 px, fast only,
and almost always starting on a tile that lit up as pressed. On the Guition
a touch that starts within 32 px of the left or right edge and travels
40 px inward, clearly sideways, now flips one page (from the right edge
leftwards is next, from the left edge rightwards previous), at any speed
and in every rotation; a swipe that starts in the middle does nothing, so
taps and drags on tiles can no longer change the page by accident. The
whole-screen gesture is removed from the Guition profile; the CYD keeps
it. Firmware 0.2.24 for both boards, the app only reworded the setting.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

tests/test_cyd_ui.cpp

@@ -86,6 +86,32 @@ int main() {
   resistive.update(50, 180);                                                       // 70 px past the settled point: a swipe
   assert(!resistive.accept(1100, 1));
   assert(!resistive.accept_repeat(1100, 1));
+  // Edge swipe (0.2.24): only a touch that starts in the side band flips a page, from the
+  // right edge leftwards "next", from the left edge rightwards "previous", once per touch,
+  // slow or fast, and never diagonally or from the middle. Rotation follows ESPHome's mapping.
+  cyd::EdgeSwipe edge;
+  edge.configure(480, 480, 32, 40);
+  edge.begin(6, 240);
+  assert(edge.armed());
+  assert(edge.update(30, 242) == 0);   // not far enough yet
+  assert(edge.update(48, 245) == -1);  // 42 px inward from the left edge: previous page
+  assert(edge.update(90, 245) == 0);   // once per touch
+  assert(!edge.armed());
+  edge.begin(474, 100);
+  assert(edge.update(430, 104) == 1);  // from the right edge: next page
+  edge.begin(240, 240);
+  assert(!edge.armed());
+  assert(edge.update(300, 240) == 0);  // started in the middle: never a page swipe
+  edge.begin(6, 240);
+  assert(edge.update(50, 300) == 0);   // diagonal: 44 px sideways against 60 down
+  assert(edge.update(-10, 240) == 0);  // moving outward: nothing
+  assert(edge.update(60, 244) == -1);  // straightened out later: still counts
+  edge.begin(240, 6, 90);
+  assert(edge.update(240, 60) == -1);  // rotated 90: the user's left edge is the panel's top
+  edge.begin(240, 6, 270);
+  assert(edge.update(240, 60) == 1);   // rotated 270: that same edge is the user's right
+  edge.begin(6, 240, 180);
+  assert(edge.update(60, 240) == 1);   // upside down: the panel's left is the user's right
   cyd::TouchGuard rollover;
   rollover.begin(std::numeric_limits<uint32_t>::max() - 30);
   assert(rollover.accept(50, 1)); // millis wraps after 49 days