diff --git a/apps/mobile/src/components/AndroidScreenHeader.tsx b/apps/mobile/src/components/AndroidScreenHeader.tsx
index 46bc2c7c0912..f672830d3645 100644
--- a/apps/mobile/src/components/AndroidScreenHeader.tsx
+++ b/apps/mobile/src/components/AndroidScreenHeader.tsx
@@ -18,6 +18,7 @@ export function AndroidHeaderIconButton(props: {
   readonly icon: AppSymbolName;
   readonly onPress?: () => void;
   readonly disabled?: boolean;
+  readonly filled?: boolean;
 }) {
   return (
     <Pressable
@@ -27,14 +28,21 @@ export function AndroidHeaderIconButton(props: {
       hitSlop={8}
       onPress={props.onPress}
       className={cn(
-        "size-11 items-center justify-center rounded-full bg-subtle",
+        "size-11 items-center justify-center rounded-full",
+        props.filled ? "bg-primary" : "bg-subtle",
         props.disabled && "opacity-55",
       )}
     >
       <SymbolView
         name={props.icon}
         size={20}
-        tintColorClassName={props.disabled ? "accent-icon-subtle" : "accent-foreground"}
+        tintColorClassName={
+          props.disabled
+            ? "accent-icon-subtle"
+            : props.filled
+              ? "accent-primary-foreground"
+              : "accent-foreground"
+        }
         type="monochrome"
       />
     </Pressable>
diff --git a/apps/mobile/src/components/AppSymbol.tsx b/apps/mobile/src/components/AppSymbol.tsx
index aa714bccb419..1f6bbeec8135 100644
--- a/apps/mobile/src/components/AppSymbol.tsx
+++ b/apps/mobile/src/components/AppSymbol.tsx
@@ -81,6 +81,7 @@ import IconSun from "@tabler/icons-react-native/IconSun";
 import IconTerminal2 from "@tabler/icons-react-native/IconTerminal2";
 import IconTextDecrease from "@tabler/icons-react-native/IconTextDecrease";
 import IconTextIncrease from "@tabler/icons-react-native/IconTextIncrease";
+import IconTextWrap from "@tabler/icons-react-native/IconTextWrap";
 import IconTool from "@tabler/icons-react-native/IconTool";
 import IconTrash from "@tabler/icons-react-native/IconTrash";
 import IconTypography from "@tabler/icons-react-native/IconTypography";
@@ -96,6 +97,7 @@ const ANDROID_ICON_BY_SF_SYMBOL: Partial<Record<SFSymbol, Icon>> = {
   "arrow.branch": IconGitBranch,
   "arrow.clockwise": IconRefresh,
   "arrow.down.circle": IconArrowDownCircle,
+  "arrow.left.and.line.vertical.and.arrow.right": IconTextWrap,
   "arrow.right.circle": IconArrowRightCircle,
   "arrow.triangle.branch": IconGitBranch,
   "arrow.triangle.pull": IconGitPullRequest,
diff --git a/apps/mobile/src/features/files/SourceFileSurface.tsx b/apps/mobile/src/features/files/SourceFileSurface.tsx
index 2eabce998e8e..b308f550eeb4 100644
--- a/apps/mobile/src/features/files/SourceFileSurface.tsx
+++ b/apps/mobile/src/features/files/SourceFileSurface.tsx
@@ -2,7 +2,7 @@ import { useAtomValue } from "@effect/atom-react";
 import { AsyncResult } from "effect/unstable/reactivity";
 import type { ComponentType } from "react";
 import { memo, useCallback, useEffect, useMemo, useRef, useState } from "react";
-import { FlatList, ScrollView, Text as NativeText, useWindowDimensions, View } from "react-native";
+import { FlatList, ScrollView, Text as NativeText, View } from "react-native";
 
 import { AppText as Text } from "../../components/AppText";
 import { LoadingStrip } from "../../components/LoadingStrip";
@@ -50,6 +50,7 @@ const HighlightedSourceLine = memo(function HighlightedSourceLine(props: {
       style={{ minHeight: props.codeSurface.rowHeight }}
     >
       <NativeText
+        allowFontScaling={false}
         className="select-none pr-3 text-right text-foreground-tertiary"
         style={{
           width: props.codeSurface.gutterWidth,
@@ -61,6 +62,7 @@ const HighlightedSourceLine = memo(function HighlightedSourceLine(props: {
         {props.index + 1}
       </NativeText>
       <NativeText
+        allowFontScaling={false}
         selectable
         numberOfLines={props.wordBreak ? undefined : 1}
         className="flex-1 font-normal text-foreground"
@@ -152,10 +154,9 @@ function NativeSourceFileSurface(
   },
 ) {
   const { NativeView, onRefresh } = props;
-  const { codeSurface, codeWordBreak, nativeSourceStyle } = useAppearanceCodeSurface();
+  const { codeSurface, nativeSourceStyle } = useAppearanceCodeSurface();
   const { themeAppearance, themeId } = useAppearancePreferences();
   const appTheme = useUniwindTheme();
-  const { width: viewportWidth } = useWindowDimensions();
   const { rowsJson, status, targetIndex, tokens } = useSourceFileModel(props);
   const [isPullRefreshing, setIsPullRefreshing] = useState(false);
   const handlePullToRefresh = useCallback(async () => {
@@ -179,9 +180,7 @@ function NativeSourceFileSurface(
     [appTheme, themeAppearance, themeId],
   );
   const styleJson = useMemo(() => JSON.stringify(nativeSourceStyle), [nativeSourceStyle]);
-  const contentWidth = codeWordBreak
-    ? Math.max(240, viewportWidth - codeSurface.gutterWidth - 24)
-    : NATIVE_SOURCE_CONTENT_WIDTH;
+  const contentWidth = NATIVE_SOURCE_CONTENT_WIDTH;
 
   return (
     <View className="relative flex-1 bg-sheet">
@@ -215,15 +214,39 @@ function JavaScriptSourceFileSurface(props: SourceFileSurfaceProps) {
   const { codeSurface, codeWordBreak } = useAppearanceCodeSurface();
   const { lines, status, targetIndex, tokens } = useSourceFileModel(props);
   const listRef = useRef<FlatList<string>>(null);
+  const [isPullRefreshing, setIsPullRefreshing] = useState(false);
+
+  const handlePullToRefresh = useCallback(async () => {
+    if (!props.onRefresh) {
+      return;
+    }
+    setIsPullRefreshing(true);
+    try {
+      await props.onRefresh();
+    } finally {
+      setIsPullRefreshing(false);
+    }
+  }, [props.onRefresh]);
+  const scrollRetryCountRef = useRef(0);
+  const retryFrameRef = useRef<number | null>(null);
+  const targetIndexRef = useRef<number | null>(null);
+  targetIndexRef.current = targetIndex;
 
   useEffect(() => {
     if (targetIndex === null) {
       return;
     }
+    scrollRetryCountRef.current = 0;
     const frame = requestAnimationFrame(() => {
       listRef.current?.scrollToIndex({ index: targetIndex, animated: false, viewPosition: 0.3 });
     });
-    return () => cancelAnimationFrame(frame);
+    return () => {
+      cancelAnimationFrame(frame);
+      if (retryFrameRef.current !== null) {
+        cancelAnimationFrame(retryFrameRef.current);
+        retryFrameRef.current = null;
+      }
+    };
   }, [props.path, targetIndex]);
 
   const renderLine = useCallback(
@@ -240,6 +263,31 @@ function JavaScriptSourceFileSurface(props: SourceFileSurfaceProps) {
     [codeSurface, codeWordBreak, targetIndex, tokens],
   );
 
+  const handleScrollToIndexFailed = useCallback(
+    (info: { index: number; averageItemLength: number }) => {
+      listRef.current?.scrollToOffset({
+        offset: Math.max(0, info.averageItemLength * info.index),
+        animated: false,
+      });
+      if (retryFrameRef.current !== null || scrollRetryCountRef.current >= 3) {
+        return;
+      }
+      scrollRetryCountRef.current += 1;
+      retryFrameRef.current = requestAnimationFrame(() => {
+        retryFrameRef.current = null;
+        if (targetIndexRef.current === null || targetIndexRef.current !== info.index) {
+          return;
+        }
+        listRef.current?.scrollToIndex({
+          index: info.index,
+          animated: false,
+          viewPosition: 0.3,
+        });
+      });
+    },
+    [],
+  );
+
   const list = (
     <FlatList
       ref={listRef}
@@ -248,6 +296,7 @@ function JavaScriptSourceFileSurface(props: SourceFileSurfaceProps) {
       initialNumToRender={80}
       maxToRenderPerBatch={80}
       windowSize={12}
+      onScrollToIndexFailed={handleScrollToIndexFailed}
       {...(codeWordBreak
         ? {}
         : {
@@ -263,6 +312,12 @@ function JavaScriptSourceFileSurface(props: SourceFileSurfaceProps) {
         paddingTop: 8,
       }}
       renderItem={renderLine}
+      {...(props.onRefresh
+        ? {
+            refreshing: isPullRefreshing,
+            onRefresh: () => void handlePullToRefresh(),
+          }
+        : {})}
     />
   );
 
@@ -281,6 +336,10 @@ function JavaScriptSourceFileSurface(props: SourceFileSurfaceProps) {
 }
 
 export function SourceFileSurface(props: SourceFileSurfaceProps) {
+  const { codeWordBreak } = useAppearanceCodeSurface();
+  if (codeWordBreak) {
+    return <JavaScriptSourceFileSurface {...props} />;
+  }
   const NativeView = resolveNativeReviewDiffView();
   return NativeView ? (
     <NativeSourceFileSurface {...props} NativeView={NativeView} />
diff --git a/apps/mobile/src/features/files/ThreadFilesRouteScreen.tsx b/apps/mobile/src/features/files/ThreadFilesRouteScreen.tsx
index 29bbdb49c890..ee04057afba5 100644
--- a/apps/mobile/src/features/files/ThreadFilesRouteScreen.tsx
+++ b/apps/mobile/src/features/files/ThreadFilesRouteScreen.tsx
@@ -547,6 +547,9 @@ export function ThreadFileScreen(props: ThreadFileRouteScreenProps) {
     readonly mode: FileViewMode;
   } | null>(null);
   const [previewRevision, setPreviewRevision] = useState(0);
+  const { appearance, setCodeWordBreak } = useAppearancePreferences();
+  const codeWordBreak = appearance.codeWordBreak;
+  const primaryColor = useUniwindTheme()["--color-primary"];
   const previewKey = JSON.stringify([environmentId, cwd, relativePath, previewRevision]);
   const [fullScreenPreview, setFullScreenPreview] = useState<FilePreviewSource | null>(null);
   const isVideoFile = relativePath !== null && isVideoPreviewFile(relativePath);
@@ -562,6 +565,9 @@ export function ThreadFileScreen(props: ThreadFileRouteScreenProps) {
       ? modeOverride.mode
       : defaultViewMode(relativePath);
   const resolvedActiveMode = isVideoFile ? "preview" : canPreview ? activeMode : "source";
+  const handleToggleWordBreak = useCallback(() => {
+    setCodeWordBreak(!codeWordBreak);
+  }, [codeWordBreak, setCodeWordBreak]);
   const assetPreviewPath = isBrowserFile || isImageFile || isVideoFile ? relativePath : null;
   const assetPreview = useWorkspaceFileAssetUrlState({
     cwd,
@@ -843,6 +849,14 @@ export function ThreadFileScreen(props: ThreadFileRouteScreenProps) {
           onBack={handleBack}
           trailing={
             <>
+              {resolvedActiveMode === "source" ? (
+                <AndroidHeaderIconButton
+                  accessibilityLabel={codeWordBreak ? "Disable word wrap" : "Enable word wrap"}
+                  icon="arrow.left.and.line.vertical.and.arrow.right"
+                  onPress={handleToggleWordBreak}
+                  filled={codeWordBreak}
+                />
+              ) : null}
               {fileInspector.supported ? (
                 <AndroidHeaderIconButton
                   accessibilityLabel={
@@ -884,6 +898,15 @@ export function ThreadFileScreen(props: ThreadFileRouteScreenProps) {
             separateBackground
           />
         ) : null}
+        {resolvedActiveMode === "source" ? (
+          <NativeHeaderToolbar.Button
+            accessibilityLabel={codeWordBreak ? "Disable word wrap" : "Enable word wrap"}
+            icon="arrow.left.and.line.vertical.and.arrow.right"
+            onPress={handleToggleWordBreak}
+            separateBackground
+            tintColor={codeWordBreak ? primaryColor : undefined}
+          />
+        ) : null}
         <NativeHeaderToolbar.Menu accessibilityLabel="File actions" icon="ellipsis">
           {fileMenuActions.some(({ inline }) => inline) ? (
             <NativeHeaderToolbar.Menu inline>