fix: avoid iOS edge lane for in-page swipes

Author: thymikee

src/__tests__/runtime-interactions.test.ts

@@ -609,16 +609,36 @@ test('runtime gesture swipe presets use stable viewport lanes', async () => {
     session: 'default',
   });
 
-  assert.deepEqual(pageSwipe.from, { x: 90, y: 65 });
-  assert.deepEqual(pageSwipe.to, { x: 10, y: 65 });
+  assert.deepEqual(pageSwipe.from, { x: 85, y: 65 });
+  assert.deepEqual(pageSwipe.to, { x: 15, y: 65 });
   assert.deepEqual(edgeSwipe.from, { x: 8, y: 50 });
   assert.deepEqual(edgeSwipe.to, { x: 85, y: 50 });
   assert.deepEqual(calls, [
-    { from: { x: 90, y: 65 }, to: { x: 10, y: 65 }, durationMs: 300 },
+    { from: { x: 85, y: 65 }, to: { x: 15, y: 65 }, durationMs: 300 },
     { from: { x: 8, y: 50 }, to: { x: 85, y: 50 }, durationMs: 350 },
   ]);
 });
 
+test('runtime iOS in-page swipe presets avoid edge-navigation lanes', async () => {
+  const calls: unknown[] = [];
+  const device = createInteractionDevice(snapshotWithOffscreenContent(), {
+    platform: 'ios',
+    swipe: async (_context, from, to, options) => {
+      calls.push({ from, to, durationMs: options?.durationMs });
+    },
+  });
+
+  const pageSwipe = await device.interactions.swipe({
+    preset: 'right',
+    durationMs: 300,
+    session: 'default',
+  });
+
+  assert.deepEqual(pageSwipe.from, { x: 15, y: 65 });
+  assert.deepEqual(pageSwipe.to, { x: 85, y: 65 });
+  assert.deepEqual(calls, [{ from: { x: 15, y: 65 }, to: { x: 85, y: 65 }, durationMs: 300 }]);
+});
+
 test('runtime viewport gestures reject inspect-only macOS surfaces', async () => {
   for (const surface of ['desktop', 'menubar'] as const) {
     const device = createInteractionDevice(selectorSnapshot(), {

src/core/__tests__/dispatch-interactions.test.ts

@@ -100,11 +100,11 @@ test('handleSwipePresetCommand resolves Android in-page swipe to content lane',
     undefined,
   );
 
-  assert.deepEqual(calls, [[360, 520, 40, 520, 300]]);
+  assert.deepEqual(calls, [[340, 520, 60, 520, 300]]);
   assert.deepEqual(result, {
-    x1: 360,
+    x1: 340,
     y1: 520,
-    x2: 40,
+    x2: 60,
     y2: 520,
     preset: 'left',
     durationMs: 300,

src/core/scroll-gesture.ts

@@ -109,12 +109,14 @@ export function buildSwipePresetGesturePlan(
   options: { platform?: string; marginPx?: number } = {},
 ): SwipePresetGesturePlan {
   const marginPx = options.marginPx ?? 8;
-  const horizontalLanePercent = options.platform === 'android' ? 65 : 50;
+  const horizontalLanePercent = 65;
+  const inPageStartPercent = 85;
+  const inPageEndPercent = 15;
   const [startPercent, endPercent, yPercent] =
     preset === 'left'
-      ? [90, 10, horizontalLanePercent]
+      ? [inPageStartPercent, inPageEndPercent, horizontalLanePercent]
       : preset === 'right'
-        ? [10, 90, horizontalLanePercent]
+        ? [inPageEndPercent, inPageStartPercent, horizontalLanePercent]
         : preset === 'left-edge'
           ? [99, 15, 50]
           : [1, 85, 50];