fix(app): keep the crash screen readable and its retry reachable (#3043)

The root error fallback was one unbounded scroller, so on a phone the title
rendered under the status bar and a long stack trace pushed Retry off the
bottom of the screen — the one action that recovers the app was unreachable
on exactly the errors that need it most.

The screen is now a fixed shell: a safe-area message block, an independently
scrolling details region, and a Retry that stays put. `SafeAreaProvider` moved
above the boundary in the root tree because the fallback renders when the app
tree below it has already failed, and insets have to be available there.

The hand-rolled Pressable and bordered message box are replaced by the shared
`<Button>` and `<ScrollableCodeSurface>`, which gives the trace a monospace
face and horizontal scrolling instead of wrapping mid-token. On desktop the
trace is capped and the action sits with the message; a button pinned to the
bottom of a tall window reads as detached from the content it belongs to.

Dropped the "Something went wrong" kicker — it restated the title one line
above it.

packages/app/src/app/_layout.tsx

@@ -954,19 +954,17 @@ function RuntimeProviders({ children }: { children: ReactNode }) {
 // context and need one shared provider for sibling sheets to stack.
 function RootProviders({ children }: { children: ReactNode }) {
   return (
-    <SafeAreaProvider>
+    <WindowChromeProvider>
-      <WindowChromeProvider>
+      <KeyboardProvider>
-        <KeyboardProvider>
+        <KeyboardShiftProvider>
-          <KeyboardShiftProvider>
+          <ToastProvider>
-            <ToastProvider>
+            <PortalProvider>
-              <PortalProvider>
+              <BottomSheetModalProvider>{children}</BottomSheetModalProvider>
-                <BottomSheetModalProvider>{children}</BottomSheetModalProvider>
+            </PortalProvider>
-              </PortalProvider>
+          </ToastProvider>
-            </ToastProvider>
+        </KeyboardShiftProvider>
-          </KeyboardShiftProvider>
+      </KeyboardProvider>
-        </KeyboardProvider>
+    </WindowChromeProvider>
-      </WindowChromeProvider>
-    </SafeAreaProvider>
   );
 }
 
@@ -998,9 +996,11 @@ export default function RootLayout() {
   return (
     <QueryProvider>
       <I18nProvider>
-        <RootErrorBoundary>
+        <SafeAreaProvider>
-          <RootAppTree />
+          <RootErrorBoundary>
-        </RootErrorBoundary>
+            <RootAppTree />
+          </RootErrorBoundary>
+        </SafeAreaProvider>
       </I18nProvider>
     </QueryProvider>
   );

packages/app/src/components/root-error-boundary.test.tsx

@@ -0,0 +1,95 @@
+import React, { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { JSDOM } from "jsdom";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { RootErrorFallback } from "./root-error-boundary";
+
+const { runtime, theme } = vi.hoisted(() => ({
+  runtime: { breakpoint: "xs" },
+  theme: {
+    spacing: { 2: 8, 3: 12, 4: 16, 6: 24, 8: 32 },
+    borderWidth: { 1: 1 },
+    borderRadius: { md: 6, lg: 8, xl: 12 },
+    fontFamily: { ui: "system-ui", mono: "monospace" },
+    fontSize: { xs: 11, code: 12, sm: 13, base: 15, xl: 20 },
+    fontWeight: { normal: "400", medium: "500", semibold: "600" },
+    colors: {
+      accent: "#369",
+      accentForeground: "#fff",
+      border: "#333",
+      borderAccent: "#444",
+      destructive: "#c33",
+      foreground: "#fff",
+      foregroundMuted: "#aaa",
+      surface0: "#111",
+      surface1: "#181818",
+      surface2: "#222",
+      surface3: "#333",
+    },
+    opacity: { 50: 0.5 },
+  },
+}));
+
+vi.mock("react-native-unistyles", () => ({
+  StyleSheet: {
+    create: (factory: unknown) => (typeof factory === "function" ? factory(theme) : factory),
+  },
+  useUnistyles: () => ({ theme, rt: runtime }),
+  withUnistyles: (component: unknown) => component,
+}));
+
+vi.mock("react-native-safe-area-context", () => ({
+  useSafeAreaInsets: () => ({ top: 47, right: 3, bottom: 34, left: 5 }),
+}));
+
+vi.mock("react-i18next", () => ({
+  useTranslation: () => ({ t: (key: string) => key }),
+}));
+
+let root: Root | null = null;
+
+beforeEach(() => {
+  const dom = new JSDOM("<!doctype html><html><body></body></html>");
+  vi.stubGlobal("React", React);
+  vi.stubGlobal("IS_REACT_ACT_ENVIRONMENT", true);
+  vi.stubGlobal("window", dom.window);
+  vi.stubGlobal("document", dom.window.document);
+  vi.stubGlobal("HTMLElement", dom.window.HTMLElement);
+  vi.stubGlobal("Node", dom.window.Node);
+  vi.stubGlobal("navigator", dom.window.navigator);
+
+  const container = document.createElement("div");
+  document.body.appendChild(container);
+  root = createRoot(container);
+});
+
+afterEach(() => {
+  act(() => root?.unmount());
+  root = null;
+  vi.unstubAllGlobals();
+});
+
+describe("RootErrorFallback", () => {
+  for (const breakpoint of ["xs", "lg"]) {
+    it(`keeps the safe-area header and retry action outside the scrollable details on ${breakpoint}`, () => {
+      runtime.breakpoint = breakpoint;
+      act(() => {
+        root?.render(<RootErrorFallback error={"failure\n".repeat(200)} onRetry={vi.fn()} />);
+      });
+
+      const screen = document.querySelector('[data-testid="root-error-boundary"]');
+      const header = document.querySelector('[data-testid="root-error-boundary-header"]');
+      const details = document.querySelector('[data-testid="root-error-boundary-details"]');
+      const retry = document.querySelector('[data-testid="root-error-boundary-retry"]');
+
+      expect(screen).not.toBeNull();
+      expect(header).not.toBeNull();
+      expect(details).not.toBeNull();
+      expect(retry).not.toBeNull();
+      expect(screen?.getAttribute("style")).toContain("padding: 47px 3px 34px 5px");
+      expect(details?.contains(header)).toBe(false);
+      expect(details?.contains(retry)).toBe(false);
+      expect(screen?.contains(retry)).toBe(true);
+    });
+  }
+});

packages/app/src/components/root-error-boundary.tsx

@@ -1,8 +1,11 @@
 import React, { Component, Fragment, type ErrorInfo, type ReactNode } from "react";
-import { Pressable, ScrollView, Text, View } from "react-native";
+import { Text, View } from "react-native";
-import type { PressableStateCallbackType, StyleProp, ViewStyle } from "react-native";
 import { useTranslation } from "react-i18next";
+import { useSafeAreaInsets } from "react-native-safe-area-context";
 import { StyleSheet } from "react-native-unistyles";
+import { Button } from "@/components/ui/button";
+import { ScrollableCodeSurface } from "@/components/ui/scrollable-code-surface";
+import { useIsCompactFormFactor } from "@/constants/layout";
 import { formatCaughtValue } from "./root-error-details";
 
 interface RootErrorBoundaryProps {
@@ -48,110 +51,113 @@ export class RootErrorBoundary extends Component<RootErrorBoundaryProps, RootErr
   }
 }
 
+// A stack trace is reference material, not the screen. Cap it so the message and
+// the retry action stay the shape of the page; the rest scrolls.
+const DETAILS_MAX_HEIGHT = 300;
+
 interface RootErrorFallbackProps {
   error: string;
   onRetry: () => void;
 }
 
-function RootErrorFallback({ error, onRetry }: RootErrorFallbackProps) {
+export function RootErrorFallback({ error, onRetry }: RootErrorFallbackProps) {
   const { t } = useTranslation();
+  const insets = useSafeAreaInsets();
+  const isCompact = useIsCompactFormFactor();
+
+  const retry = (
+    <Button variant="default" onPress={onRetry} testID="root-error-boundary-retry">
+      {t("common.actions.retry")}
+    </Button>
+  );
 
   return (
-    <ScrollView
+    <View
-      style={styles.container}
+      style={[
-      contentContainerStyle={styles.contentContainer}
+        styles.container,
+        {
+          paddingTop: insets.top,
+          paddingRight: insets.right,
+          paddingBottom: insets.bottom,
+          paddingLeft: insets.left,
+        },
+      ]}
       testID="root-error-boundary"
     >
       <View style={styles.content}>
-        <Text style={styles.kicker}>{t("rootError.kicker")}</Text>
+        <View style={styles.header} testID="root-error-boundary-header">
-        <Text style={styles.title}>{t("rootError.title")}</Text>
+          <Text style={styles.title}>{t("rootError.title")}</Text>
-        <Text style={styles.body}>{t("rootError.body")}</Text>
+          <Text style={styles.body}>{t("rootError.body")}</Text>
-        <View style={styles.messageBox}>
-          <Text style={styles.messageLabel}>{t("rootError.details")}</Text>
-          <Text style={styles.message}>{error}</Text>
         </View>
-        <Pressable
+        <View style={styles.details}>
-          accessibilityRole="button"
+          <Text style={styles.detailsLabel}>{t("rootError.details")}</Text>
-          onPress={onRetry}
+          <ScrollableCodeSurface
-          style={retryButtonStyle}
+            maxHeight={isCompact ? undefined : DETAILS_MAX_HEIGHT}
-          testID="root-error-boundary-retry"
+            style={styles.detailsSurface}
-        >
+            scrollStyle={styles.detailsScroll}
-          <Text style={styles.retryButtonText}>{t("common.actions.retry")}</Text>
+            testID="root-error-boundary-details"
-        </Pressable>
+          >
+            {error}
+          </ScrollableCodeSurface>
+        </View>
+        {isCompact ? null : retry}
       </View>
-    </ScrollView>
+      {isCompact ? <View style={styles.footer}>{retry}</View> : null}
+    </View>
   );
 }
 
-function retryButtonStyle({ pressed }: PressableStateCallbackType): StyleProp<ViewStyle> {
-  return [styles.retryButton, pressed ? styles.retryButtonPressed : null];
-}
-
 const styles = StyleSheet.create((theme) => ({
   container: {
     flex: 1,
     backgroundColor: theme.colors.surface0,
   },
-  contentContainer: {
+  content: {
-    flexGrow: 1,
+    flex: 1,
+    alignSelf: "center",
+    width: "100%",
+    maxWidth: 420,
     justifyContent: "center",
+    gap: theme.spacing[6],
     paddingHorizontal: theme.spacing[6],
     paddingVertical: theme.spacing[8],
   },
-  content: {
+  header: {
-    alignSelf: "center",
+    alignItems: "center",
-    width: "100%",
+    gap: theme.spacing[2],
-    maxWidth: 520,
-    gap: theme.spacing[4],
-  },
-  kicker: {
-    color: theme.colors.destructive,
-    fontSize: theme.fontSize.sm,
-    fontWeight: theme.fontWeight.semibold,
   },
   title: {
     color: theme.colors.foreground,
     fontSize: theme.fontSize.xl,
-    fontWeight: theme.fontWeight.semibold,
+    fontWeight: theme.fontWeight.medium,
+    textAlign: "center",
   },
   body: {
     color: theme.colors.foregroundMuted,
-    fontSize: theme.fontSize.base,
-    lineHeight: 22,
-  },
-  messageBox: {
-    gap: theme.spacing[2],
-    borderWidth: 1,
-    borderColor: theme.colors.borderAccent,
-    borderRadius: theme.borderRadius.lg,
-    backgroundColor: theme.colors.surface1,
-    padding: theme.spacing[4],
-  },
-  messageLabel: {
-    color: theme.colors.foregroundMuted,
-    fontSize: theme.fontSize.xs,
-    fontWeight: theme.fontWeight.semibold,
-  },
-  message: {
-    color: theme.colors.foreground,
     fontSize: theme.fontSize.sm,
     lineHeight: 20,
+    textAlign: "center",
   },
-  retryButton: {
+  details: {
-    alignSelf: "flex-start",
+    flexShrink: 1,
-    minHeight: 40,
+    gap: theme.spacing[2],
-    justifyContent: "center",
-    borderRadius: theme.borderRadius.md,
-    backgroundColor: theme.colors.accent,
-    paddingHorizontal: theme.spacing[4],
-    paddingVertical: theme.spacing[2],
   },
-  retryButtonPressed: {
+  detailsLabel: {
-    opacity: 0.85,
+    color: theme.colors.foregroundMuted,
+    fontSize: theme.fontSize.xs,
+    fontWeight: theme.fontWeight.medium,
   },
-  retryButtonText: {
+  detailsSurface: {
-    color: theme.colors.accentForeground,
+    flexShrink: 1,
-    fontSize: theme.fontSize.sm,
+  },
-    fontWeight: theme.fontWeight.semibold,
+  detailsScroll: {
+    flexShrink: 1,
+  },
+  footer: {
+    alignSelf: "center",
+    width: "100%",
+    maxWidth: 420,
+    paddingHorizontal: theme.spacing[6],
+    paddingBottom: theme.spacing[6],
   },
 }));

packages/app/src/i18n/resources/ar.ts

@@ -1243,7 +1243,6 @@ export const ar: TranslationResources = {
     },
   },
   rootError: {
-    kicker: "حدث خطأ",
     title: "واجه Paseo مشكلة.",
     body: "جرّب مرة أخرى لإعادة تحميل التطبيق. إذا استمر حدوث ذلك، فأرفق التفاصيل أدناه عند الإبلاغ عنه.",
     details: "التفاصيل",

packages/app/src/i18n/resources/en.ts

@@ -1253,7 +1253,6 @@ export const en = {
     },
   },
   rootError: {
-    kicker: "Something went wrong",
     title: "Paseo ran into a problem.",
     body: "Try again to reload the app. If this keeps happening, include the details below when you report it.",
     details: "Details",

packages/app/src/i18n/resources/es.ts

@@ -1283,7 +1283,6 @@ export const es: TranslationResources = {
     },
   },
   rootError: {
-    kicker: "Algo salió mal",
     title: "Paseo tuvo un problema.",
     body: "Vuelve a intentarlo para recargar la app. Si sigue ocurriendo, incluye los detalles de abajo al reportarlo.",
     details: "Detalles",

packages/app/src/i18n/resources/fr.ts

@@ -1286,7 +1286,6 @@ export const fr: TranslationResources = {
     },
   },
   rootError: {
-    kicker: "Une erreur s'est produite",
     title: "Paseo a rencontré un problème.",
     body: "Réessayez pour recharger l'application. Si cela continue, joignez les détails ci-dessous au signalement.",
     details: "Détails",

packages/app/src/i18n/resources/ja.ts

@@ -1256,7 +1256,6 @@ export const ja: TranslationResources = {
     },
   },
   rootError: {
-    kicker: "問題が発生しました",
     title: "Paseo で問題が発生しました。",
     body: "アプリを再読み込みするにはもう一度お試しください。繰り返し発生する場合は、以下の詳細を添えて報告してください。",
     details: "詳細",

packages/app/src/i18n/resources/ko.ts

@@ -1252,7 +1252,6 @@ export const ko: TranslationResources = {
     },
   },
   rootError: {
-    kicker: "문제가 발생했습니다.",
     title: "Paseo에 문제가 발생했습니다.",
     body: "앱을 다시 로드해 보세요. 이런 일이 계속 발생하면 신고할 때 아래 세부정보를 포함하세요.",
     details: "세부",

packages/app/src/i18n/resources/pt-BR.ts

@@ -1269,7 +1269,6 @@ export const ptBR: TranslationResources = {
     },
   },
   rootError: {
-    kicker: "Algo deu errado",
     title: "O Paseo encontrou um problema.",
     body: "Tente novamente para recarregar o app. Se isso continuar acontecendo, inclua os detalhes abaixo ao relatar o problema.",
     details: "Detalhes",

packages/app/src/i18n/resources/ru.ts

@@ -1272,7 +1272,6 @@ export const ru: TranslationResources = {
     },
   },
   rootError: {
-    kicker: "Что-то пошло не так",
     title: "В Paseo возникла проблема.",
     body: "Попробуйте снова перезагрузить приложение. Если это повторяется, приложите приведенные ниже подробности к отчету.",
     details: "Подробности",

packages/app/src/i18n/resources/zh-CN.ts

@@ -1227,7 +1227,6 @@ export const zhCN: TranslationResources = {
     },
   },
   rootError: {
-    kicker: "出现问题",
     title: "Paseo 遇到了问题。",
     body: "请重试以重新加载应用。如果问题持续发生，请在报告时附上下面的详细信息。",
     details: "详情",