fix(app): keep chat status toasts visible below floating headers

Compact native chats extend beneath the floating header. Panel toasts need measured header clearance and a layer above its fade; placing them below the fade leaves an excessive gap. Keep dock overlays outside keyboard translation so opening the keyboard cannot move them offscreen.

packages/app/src/components/floating-header/clearance.test.ts

@@ -0,0 +1,16 @@
+import { describe, expect, it } from "vitest";
+import { floatingHeaderOverlayClearance } from "./clearance";
+
+describe("floating header overlay clearance", () => {
+  it("keeps stationary status overlays 12 points below the measured header", () => {
+    for (const headerHeight of [72, 108, 132]) {
+      const toastTop = floatingHeaderOverlayClearance(true, headerHeight) + 12;
+      expect(toastTop).toBe(headerHeight + 12);
+    }
+  });
+
+  it("adds no clearance when the header is in flow or hidden for fullscreen", () => {
+    expect(floatingHeaderOverlayClearance(false, 108)).toBe(0);
+    expect(floatingHeaderOverlayClearance(false, 0)).toBe(0);
+  });
+});

packages/app/src/components/floating-header/clearance.ts

@@ -0,0 +1,6 @@
+/** Content fades beneath the header; status overlays render above that fade. */
+export const FLOATING_HEADER_FADE_OVERHANG = 48;
+
+export function floatingHeaderOverlayClearance(floating: boolean, headerHeight: number): number {
+  return floating ? headerHeight : 0;
+}

packages/app/src/components/floating-header/index.tsx

@@ -1,10 +1,30 @@
-import { useCallback, useState, type ReactNode } from "react";
+import { createContext, useContext, useCallback, useState, useId, type ReactNode } from "react";
 import { View, type LayoutChangeEvent } from "react-native";
 import { StyleSheet } from "react-native-unistyles";
+import { Portal, PortalHost } from "@gorhom/portal";
+import { useRetainedPanelActive } from "@/components/retained-panel";
 import { EdgeFade } from "@/components/ui/edge-fade";
 
+import { FLOATING_HEADER_FADE_OVERHANG, floatingHeaderOverlayClearance } from "./clearance";
+
+const OverlayClearanceContext = createContext(0);
+const OverlayHostContext = createContext<string | null>(null);
+
+/** Keep status overlays above the fade without lifting the scrolling content. */
+export function FloatingHeaderOverlay({ children }: { children: ReactNode }) {
+  const hostName = useContext(OverlayHostContext);
+  const active = useRetainedPanelActive();
+  if (!hostName) return children;
+  return active ? <Portal hostName={hostName}>{children}</Portal> : null;
+}
+
+/** Clearance for stationary overlays inside this layout, measured to the header bottom. */
+export function useFloatingHeaderOverlayClearance(): number {
+  return useContext(OverlayClearanceContext);
+}
+
 /** How far the fade runs past the header's bottom edge, so content dissolves instead of clipping. */
-const FADE_OVERHANG = 48;
+const FADE_OVERHANG = FLOATING_HEADER_FADE_OVERHANG;
 /** Share of the fade that stays opaque, so the header's title and icons keep contrast. */
 const FADE_SOLID_FRACTION = 0.57;
 
@@ -20,15 +40,24 @@ interface FloatingHeaderLayoutProps {
  * same tree position in both modes, so toggling `floating` never remounts them.
  */
 export function FloatingHeaderLayout({ header, floating, children }: FloatingHeaderLayoutProps) {
+  const overlayHostName = useId();
   const [headerHeight, setHeaderHeight] = useState(0);
   const handleHeaderLayout = useCallback((event: LayoutChangeEvent) => {
     setHeaderHeight(Math.round(event.nativeEvent.layout.height));
   }, []);
 
+  const overlayClearance = floatingHeaderOverlayClearance(floating, headerHeight);
+
   return (
     <View style={styles.root}>
       {floating ? null : header}
-      <View style={styles.content}>{children(floating ? headerHeight : 0)}</View>
+      <View style={styles.content}>
+        <OverlayClearanceContext.Provider value={overlayClearance}>
+          <OverlayHostContext.Provider value={floating ? overlayHostName : null}>
+            {children(floating ? headerHeight : 0)}
+          </OverlayHostContext.Provider>
+        </OverlayClearanceContext.Provider>
+      </View>
       {floating ? (
         <View style={styles.overlay} pointerEvents="box-none">
           <EdgeFade
@@ -42,6 +71,9 @@ export function FloatingHeaderLayout({ header, floating, children }: FloatingHea
           </View>
         </View>
       ) : null}
+      <View style={styles.statusOverlay} pointerEvents="box-none">
+        <PortalHost name={overlayHostName} />
+      </View>
     </View>
   );
 }
@@ -55,6 +87,13 @@ const styles = StyleSheet.create({
     flex: 1,
     minHeight: 0,
   },
+  statusOverlay: {
+    position: "absolute",
+    top: 0,
+    bottom: 0,
+    left: 0,
+    right: 0,
+  },
   overlay: {
     position: "absolute",
     top: 0,

packages/app/src/components/toast-host.tsx

@@ -1,3 +1,7 @@
+import {
+  FloatingHeaderOverlay,
+  useFloatingHeaderOverlayClearance,
+} from "@/components/floating-header";
 import { useCallback, useEffect, useMemo, useRef, useState, type ReactNode } from "react";
 import { createPortal } from "react-dom";
 import {
@@ -190,9 +194,11 @@ export function ToastViewport({
     return clearTimer;
   }, [clearTimer, durationMs, scheduleDismiss, toastId]);
 
+  const panelClearance = useFloatingHeaderOverlayClearance();
   const headerHeight = isMobile ? HEADER_INNER_HEIGHT_MOBILE : HEADER_INNER_HEIGHT;
   const headerTopPadding = isMobile ? HEADER_TOP_PADDING_MOBILE : 0;
-  const topOffset = placement === "app-shell" ? insets.top + headerTopPadding + headerHeight : 0;
+  const topOffset =
+    placement === "app-shell" ? insets.top + headerTopPadding + headerHeight : panelClearance;
 
   const content = (
     <View
@@ -220,7 +226,7 @@ export function ToastViewport({
     return createPortal(content, getOverlayRoot());
   }
 
-  return content;
+  return placement === "panel" ? <FloatingHeaderOverlay>{content}</FloatingHeaderOverlay> : content;
 }
 
 function ToastCard({

packages/app/src/composer/dock/index.native.tsx

@@ -179,8 +179,8 @@ export function ComposerDock({
               <View style={fullscreen ? fullscreenSurface : dockStyles.composer}>{composer}</View>
             </ComposerViewportContent>
           </ComposerViewportContent>
-          {overlay}
         </KeyboardTranslateView>
+        {overlay}
       </ComposerViewport>
     );
   }
@@ -214,8 +214,8 @@ export function ComposerDock({
             {composer}
           </View>
         </ComposerViewportContent>
-        {overlay}
       </KeyboardTranslateView>
+      {overlay}
     </ComposerViewport>
   );
 }

packages/app/src/composer/dock/overlay-placement.test.ts

@@ -0,0 +1,31 @@
+import { readFileSync } from "node:fs";
+import ts from "typescript";
+import { expect, it } from "vitest";
+
+it("keeps dock overlays outside keyboard translation in every native layout", () => {
+  const source = ts.createSourceFile(
+    "dock.tsx",
+    readFileSync(new URL("./index.native.tsx", import.meta.url), "utf8"),
+    ts.ScriptTarget.Latest,
+    true,
+    ts.ScriptKind.TSX,
+  );
+  let surfaces = 0;
+  function visit(node: ts.Node) {
+    if (
+      ts.isJsxElement(node) &&
+      node.openingElement.tagName.getText(source) === "KeyboardTranslateView"
+    ) {
+      surfaces++;
+      function assertStationary(child: ts.Node) {
+        if (ts.isJsxExpression(child))
+          expect(child.expression?.getText(source)).not.toBe("overlay");
+        ts.forEachChild(child, assertStationary);
+      }
+      ts.forEachChild(node, assertStationary);
+    }
+    ts.forEachChild(node, visit);
+  }
+  visit(source);
+  expect(surfaces).toBe(2);
+});