Fix mobile sidebar swipes under load

Move mobile sidebar gesture gating to shared visual panel state so swipes can open and close sidebars before React state catches up. Keep the sidebar list scroll simultaneous with the close pan so vertical scrolling stays immediate.

packages/app/src/components/left-sidebar.tsx

@@ -40,7 +40,11 @@ import { Shortcut } from "@/components/ui/shortcut";
 import { Tooltip, TooltipContent, TooltipTrigger } from "@/components/ui/tooltip";
 import { useIsCompactFormFactor } from "@/constants/layout";
 import { isWeb } from "@/constants/platform";
-import { useSidebarAnimation } from "@/contexts/sidebar-animation-context";
+import {
+  MOBILE_VISUAL_PANEL_AGENT,
+  MOBILE_VISUAL_PANEL_AGENT_LIST,
+  useSidebarAnimation,
+} from "@/contexts/sidebar-animation-context";
 import { useOpenProjectPicker } from "@/hooks/use-open-project-picker";
 import { useShortcutKeys } from "@/hooks/use-shortcut-keys";
 import { useSidebarShortcutModel } from "@/hooks/use-sidebar-shortcut-model";
@@ -567,6 +571,7 @@ function MobileSidebar({
     animateToOpen,
     animateToClose,
     isGesturing,
+    mobileVisualPanel,
     gestureAnimatingRef,
     closeGestureRef,
   } = useSidebarAnimation();
@@ -603,7 +608,7 @@ function MobileSidebar({
     () =>
       Gesture.Pan()
         .withRef(closeGestureRef)
-        .enabled(isOpen)
+        .enabled(true)
         .manualActivation(true)
         .onTouchesDown((event) => {
           const touch = event.changedTouches[0];
@@ -625,6 +630,11 @@ function MobileSidebar({
           const absDeltaX = Math.abs(deltaX);
           const absDeltaY = Math.abs(deltaY);
 
+          if (mobileVisualPanel.value !== MOBILE_VISUAL_PANEL_AGENT_LIST) {
+            stateManager.fail();
+            return;
+          }
+
           if (deltaX >= 10) {
             stateManager.fail();
             return;
@@ -654,9 +664,11 @@ function MobileSidebar({
           isGesturing.value = false;
           const shouldClose = event.translationX < -windowWidth / 3 || event.velocityX < -500;
           if (shouldClose) {
+            mobileVisualPanel.value = MOBILE_VISUAL_PANEL_AGENT;
             animateToClose();
             runOnJS(handleCloseFromGesture)();
           } else {
+            mobileVisualPanel.value = MOBILE_VISUAL_PANEL_AGENT_LIST;
             animateToOpen();
           }
         })
@@ -664,11 +676,11 @@ function MobileSidebar({
           isGesturing.value = false;
         }),
     [
-      isOpen,
       closeGestureRef,
       closeTouchStartX,
       closeTouchStartY,
       isGesturing,
+      mobileVisualPanel,
       windowWidth,
       translateX,
       backdropOpacity,