Refactor git actions and update React to 19.1.4

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

@@ -412,6 +412,7 @@ function SidebarContent({
             serverId={serverId}
             workspaceId={workspaceId}
             cwd={workspaceRoot}
+            hideHeaderRow={!isMobile}
           />
         )}
         {resolvedTab === "files" && (

packages/app/src/components/git-actions-split-button.tsx

@@ -0,0 +1,192 @@
+import { useCallback } from "react";
+import { View, Text, ActivityIndicator, Pressable } from "react-native";
+import { StyleSheet, useUnistyles } from "react-native-unistyles";
+import { ChevronDown, MoreVertical } from "lucide-react-native";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuSeparator,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
+import type { GitAction, GitActions } from "@/hooks/use-git-actions";
+
+interface GitActionsSplitButtonProps {
+  gitActions: GitActions;
+}
+
+export function GitActionsSplitButton({ gitActions }: GitActionsSplitButtonProps) {
+  const { theme } = useUnistyles();
+
+  const getActionDisplayLabel = useCallback((action: GitAction): string => {
+    if (action.status === "pending") return action.pendingLabel;
+    if (action.status === "success") return action.successLabel;
+    return action.label;
+  }, []);
+
+  return (
+    <View style={styles.row}>
+      {gitActions.primary ? (
+        <View style={styles.splitButton}>
+          <Pressable
+            testID="changes-primary-cta"
+            style={({ hovered, pressed }) => [
+              styles.splitButtonPrimary,
+              (hovered || pressed) && styles.splitButtonPrimaryHovered,
+              gitActions.primary!.disabled && styles.splitButtonPrimaryDisabled,
+            ]}
+            onPress={gitActions.primary.handler}
+            disabled={gitActions.primary.disabled}
+            accessibilityRole="button"
+            accessibilityLabel={gitActions.primary.label}
+          >
+            {gitActions.primary.status === "pending" ? (
+              <ActivityIndicator
+                size="small"
+                color={theme.colors.foreground}
+                style={styles.splitButtonSpinnerOnly}
+              />
+            ) : (
+              <View style={styles.splitButtonContent}>
+                {gitActions.primary.icon}
+                <Text style={styles.splitButtonText}>{getActionDisplayLabel(gitActions.primary)}</Text>
+              </View>
+            )}
+          </Pressable>
+          {gitActions.secondary.length > 0 ? (
+            <DropdownMenu>
+              <DropdownMenuTrigger
+                testID="changes-primary-cta-caret"
+                style={({ hovered, pressed, open }) => [
+                  styles.splitButtonCaret,
+                  (hovered || pressed || open) && styles.splitButtonCaretHovered,
+                ]}
+                accessibilityRole="button"
+                accessibilityLabel="More options"
+              >
+                <ChevronDown size={16} color={theme.colors.foregroundMuted} />
+              </DropdownMenuTrigger>
+              <DropdownMenuContent align="end" testID="changes-primary-cta-menu">
+                {gitActions.secondary.map((action, index) => {
+                  const needsSeparator = action.id === "merge-from-base" || action.id === "push";
+                  return (
+                    <View key={action.id}>
+                      {needsSeparator && index > 0 ? <DropdownMenuSeparator /> : null}
+                      <DropdownMenuItem
+                        testID={`changes-menu-${action.id}`}
+                        leading={action.icon}
+                        disabled={action.disabled}
+                        status={action.status}
+                        pendingLabel={action.pendingLabel}
+                        successLabel={action.successLabel}
+                        closeOnSelect={action.status === "idle" && action.id === "view-pr"}
+                        description={action.description}
+                        onSelect={action.handler}
+                      >
+                        {action.label}
+                      </DropdownMenuItem>
+                    </View>
+                  );
+                })}
+              </DropdownMenuContent>
+            </DropdownMenu>
+          ) : null}
+        </View>
+      ) : null}
+      {gitActions.menu.length > 0 ? (
+        <DropdownMenu>
+          <DropdownMenuTrigger
+            testID="changes-overflow-menu"
+            hitSlop={8}
+            style={[styles.iconButton, styles.overflowMenuButton]}
+            accessibilityRole="button"
+            accessibilityLabel="More actions"
+          >
+            <MoreVertical size={16} color={theme.colors.foregroundMuted} />
+          </DropdownMenuTrigger>
+          <DropdownMenuContent align="end" width={220} testID="changes-overflow-content">
+            {gitActions.menu.map((action) => (
+              <DropdownMenuItem
+                key={action.id}
+                testID={`changes-menu-${action.id}`}
+                leading={action.icon}
+                disabled={action.disabled}
+                status={action.status}
+                pendingLabel={action.pendingLabel}
+                successLabel={action.successLabel}
+                closeOnSelect={false}
+                onSelect={action.handler}
+              >
+                {action.label}
+              </DropdownMenuItem>
+            ))}
+          </DropdownMenuContent>
+        </DropdownMenu>
+      ) : null}
+    </View>
+  );
+}
+
+const styles = StyleSheet.create((theme) => ({
+  row: {
+    flexDirection: "row",
+    alignItems: "center",
+    gap: theme.spacing[1],
+    flexShrink: 0,
+  },
+  splitButton: {
+    flexDirection: "row",
+    alignItems: "stretch",
+    borderRadius: theme.borderRadius.md,
+    borderWidth: theme.borderWidth[1],
+    borderColor: theme.colors.borderAccent,
+    overflow: "hidden",
+  },
+  splitButtonPrimary: {
+    paddingHorizontal: theme.spacing[3],
+    paddingVertical: theme.spacing[1],
+    justifyContent: "center",
+    position: "relative",
+  },
+  splitButtonPrimaryHovered: {
+    backgroundColor: theme.colors.surface2,
+  },
+  splitButtonPrimaryDisabled: {
+    opacity: 0.6,
+  },
+  splitButtonText: {
+    fontSize: theme.fontSize.sm,
+    lineHeight: theme.fontSize.sm * 1.5,
+    color: theme.colors.foreground,
+    fontWeight: theme.fontWeight.normal,
+  },
+  splitButtonContent: {
+    flexDirection: "row",
+    alignItems: "center",
+    justifyContent: "center",
+    gap: theme.spacing[2],
+  },
+  splitButtonSpinnerOnly: {
+    transform: [{ scale: 0.8 }],
+  },
+  splitButtonCaret: {
+    width: 28,
+    alignItems: "center",
+    justifyContent: "center",
+    borderLeftWidth: theme.borderWidth[1],
+    borderLeftColor: theme.colors.borderAccent,
+  },
+  splitButtonCaretHovered: {
+    backgroundColor: theme.colors.surface2,
+  },
+  iconButton: {
+    width: 32,
+    height: 32,
+    alignItems: "center",
+    justifyContent: "center",
+    borderRadius: theme.borderRadius.md,
+  },
+  overflowMenuButton: {
+    marginRight: -theme.spacing[2],
+  },
+}));

packages/app/src/components/git-diff-pane.tsx

@@ -23,7 +23,6 @@ import {
   GitMerge,
   ListChevronsDownUp,
   ListChevronsUpDown,
-  MoreVertical,
   RefreshCcw,
   Upload,
 } from "lucide-react-native";
@@ -47,7 +46,6 @@ import {
   DropdownMenuItem,
   DropdownMenuSeparator,
   DropdownMenuTrigger,
-  type ActionStatus,
 } from "@/components/ui/dropdown-menu";
 import { GitHubIcon } from "@/components/icons/github-icon";
 import {
@@ -58,36 +56,11 @@ import { buildNewAgentRoute, resolveNewAgentWorkingDir } from "@/utils/new-agent
 import { openExternalUrl } from "@/utils/open-external-url";
 import { shouldShowMergeFromBaseAction } from "./git-action-visibility";
 
-// =============================================================================
-// Git Actions Data Structure
-// =============================================================================
+import { type GitActionId, type GitAction, type GitActions } from "@/hooks/use-git-actions";
+import { GitActionsSplitButton } from "@/components/git-actions-split-button";
 
-type GitActionId =
-  | "commit"
-  | "push"
-  | "view-pr"
-  | "create-pr"
-  | "merge-branch"
-  | "merge-from-base"
-  | "archive-worktree";
-
-interface GitAction {
-  id: GitActionId;
-  label: string;
-  pendingLabel: string;
-  successLabel: string;
-  disabled: boolean;
-  status: ActionStatus;
-  description?: string;
-  icon?: ReactElement;
-  handler: () => void;
-}
-
-interface GitActions {
-  primary: GitAction | null;
-  secondary: GitAction[];
-  menu: GitAction[];
-}
+// Re-export types from shared hook
+export type { GitActionId, GitAction, GitActions } from "@/hooks/use-git-actions";
 
 function openURLInNewTab(url: string): void {
   void openExternalUrl(url);
@@ -466,13 +439,14 @@ interface GitDiffPaneProps {
   serverId: string;
   workspaceId?: string | null;
   cwd: string;
+  hideHeaderRow?: boolean;
 }
 
 type DiffFlatItem =
   | { type: "header"; file: ParsedDiffFile; fileIndex: number; isExpanded: boolean }
   | { type: "body"; file: ParsedDiffFile; fileIndex: number };
 
-export function GitDiffPane({ serverId, workspaceId, cwd }: GitDiffPaneProps) {
+export function GitDiffPane({ serverId, workspaceId, cwd, hideHeaderRow }: GitDiffPaneProps) {
   const { theme } = useUnistyles();
   const isMobile =
     UnistylesRuntime.breakpoint === "xs" || UnistylesRuntime.breakpoint === "sm";
@@ -1219,119 +1193,22 @@ export function GitDiffPane({ serverId, workspaceId, cwd }: GitDiffPaneProps) {
   ]);
 
   // Helper to get display label based on status
-  const getActionDisplayLabel = useCallback((action: GitAction): string => {
-    if (action.status === "pending") return action.pendingLabel;
-    if (action.status === "success") return action.successLabel;
-    return action.label;
-  }, []);
 
   return (
     <View style={styles.container}>
-      <View style={styles.header} testID="changes-header">
-        <View style={styles.headerLeft}>
-          <GitBranch size={16} color={theme.colors.foregroundMuted} />
-          <Text style={styles.branchLabel} testID="changes-branch" numberOfLines={1}>
-            {branchLabel}
-          </Text>
-        </View>
-        {isGit ? (
-          <View style={styles.headerRight}>
-            {gitActions.primary ? (
-              <View style={styles.splitButton}>
-                <Pressable
-                  testID="changes-primary-cta"
-                  style={[
-                    styles.splitButtonPrimary,
-                    gitActions.primary.disabled && styles.splitButtonPrimaryDisabled,
-                  ]}
-                  onPress={gitActions.primary.handler}
-                  disabled={gitActions.primary.disabled}
-                  accessibilityRole="button"
-                  accessibilityLabel={gitActions.primary.label}
-                >
-                  {gitActions.primary.status === "pending" ? (
-                    <ActivityIndicator
-                      size="small"
-                      color={theme.colors.foreground}
-                      style={styles.splitButtonSpinnerOnly}
-                    />
-                  ) : (
-                    <View style={styles.splitButtonContent}>
-                      {gitActions.primary.icon}
-                      <Text style={styles.splitButtonText}>{getActionDisplayLabel(gitActions.primary)}</Text>
-                    </View>
-                  )}
-                </Pressable>
-                {gitActions.secondary.length > 0 ? (
-                  <DropdownMenu>
-                    <DropdownMenuTrigger
-                      testID="changes-primary-cta-caret"
-                      style={styles.splitButtonCaret}
-                      accessibilityRole="button"
-                      accessibilityLabel="More options"
-                    >
-                      <ChevronDown size={16} color={theme.colors.foregroundMuted} />
-                    </DropdownMenuTrigger>
-                    <DropdownMenuContent align="end" testID="changes-primary-cta-menu">
-                      {gitActions.secondary.map((action, index) => {
-                        const needsSeparator = action.id === "merge-from-base" || action.id === "push";
-                        return (
-                          <View key={action.id}>
-                            {needsSeparator && index > 0 ? <DropdownMenuSeparator /> : null}
-                            <DropdownMenuItem
-                              testID={`changes-menu-${action.id}`}
-                              leading={action.icon}
-                              disabled={action.disabled}
-                              status={action.status}
-                              pendingLabel={action.pendingLabel}
-                              successLabel={action.successLabel}
-                              closeOnSelect={action.status === "idle" && action.id === "view-pr"}
-                              description={action.description}
-                              onSelect={action.handler}
-                            >
-                              {action.label}
-                            </DropdownMenuItem>
-                          </View>
-                        );
-                      })}
-                    </DropdownMenuContent>
-                  </DropdownMenu>
-                ) : null}
-              </View>
-            ) : null}
-            {gitActions.menu.length > 0 ? (
-              <DropdownMenu>
-                <DropdownMenuTrigger
-                  testID="changes-overflow-menu"
-                  hitSlop={8}
-                  style={[styles.iconButton, styles.overflowMenuButton]}
-                  accessibilityRole="button"
-                  accessibilityLabel="More actions"
-                >
-                  <MoreVertical size={16} color={theme.colors.foregroundMuted} />
-                </DropdownMenuTrigger>
-                <DropdownMenuContent align="end" width={220} testID="changes-overflow-content">
-                  {gitActions.menu.map((action) => (
-                    <DropdownMenuItem
-                      key={action.id}
-                      testID={`changes-menu-${action.id}`}
-                      leading={action.icon}
-                      disabled={action.disabled}
-                      status={action.status}
-                      pendingLabel={action.pendingLabel}
-                      successLabel={action.successLabel}
-                      closeOnSelect={false}
-                      onSelect={action.handler}
-                    >
-                      {action.label}
-                    </DropdownMenuItem>
-                  ))}
-                </DropdownMenuContent>
-              </DropdownMenu>
-            ) : null}
+      {!hideHeaderRow ? (
+        <View style={styles.header} testID="changes-header">
+          <View style={styles.headerLeft}>
+            <GitBranch size={16} color={theme.colors.foregroundMuted} />
+            <Text style={styles.branchLabel} testID="changes-branch" numberOfLines={1}>
+              {branchLabel}
+            </Text>
           </View>
-        ) : null}
-      </View>
+          {isGit ? (
+            <GitActionsSplitButton gitActions={gitActions} />
+          ) : null}
+        </View>
+      ) : null}
 
       {isGit ? (
         <View style={styles.diffStatusContainer}>
@@ -1438,12 +1315,6 @@ const styles = StyleSheet.create((theme) => ({
     flex: 1,
     minWidth: 0,
   },
-  headerRight: {
-    flexDirection: "row",
-    alignItems: "center",
-    gap: theme.spacing[1],
-    flexShrink: 0,
-  },
   branchLabel: {
     fontSize: theme.fontSize.sm,
     color: theme.colors.foreground,
@@ -1496,112 +1367,6 @@ const styles = StyleSheet.create((theme) => ({
     paddingVertical: theme.spacing[1],
     borderRadius: theme.borderRadius.base,
   },
-  splitButton: {
-    flexDirection: "row",
-    alignItems: "stretch",
-    borderRadius: theme.borderRadius.md,
-    backgroundColor: theme.colors.surface2,
-    borderWidth: theme.borderWidth[1],
-    borderColor: theme.colors.borderAccent,
-    overflow: "hidden",
-  },
-  splitButtonPrimary: {
-    paddingHorizontal: theme.spacing[3],
-    paddingVertical: theme.spacing[1],
-    justifyContent: "center",
-    position: "relative",
-  },
-  splitButtonPrimaryDisabled: {
-    opacity: 0.6,
-  },
-  splitButtonText: {
-    fontSize: theme.fontSize.sm,
-    lineHeight: theme.fontSize.sm * 1.5,
-    color: theme.colors.foreground,
-    fontWeight: theme.fontWeight.medium,
-  },
-  splitButtonContent: {
-    flexDirection: "row",
-    alignItems: "center",
-    justifyContent: "center",
-    gap: theme.spacing[2],
-  },
-  splitButtonSpinnerOnly: {
-    transform: [{ scale: 0.8 }],
-  },
-  splitButtonCaret: {
-    width: 36,
-    alignItems: "center",
-    justifyContent: "center",
-    borderLeftWidth: theme.borderWidth[1],
-    borderLeftColor: theme.colors.borderAccent,
-  },
-  iconButton: {
-    width: 32,
-    height: 32,
-    alignItems: "center",
-    justifyContent: "center",
-    borderRadius: theme.borderRadius.md,
-  },
-  overflowMenuButton: {
-    marginRight: -theme.spacing[2],
-  },
-  menuOverlay: {
-    flex: 1,
-  },
-  menuBackdrop: {
-    position: "absolute",
-    top: 0,
-    right: 0,
-    bottom: 0,
-    left: 0,
-  },
-  dropdownMenu: {
-    backgroundColor: theme.colors.surface0,
-    borderWidth: 1,
-    borderColor: theme.colors.borderAccent,
-    borderRadius: theme.borderRadius.lg,
-    overflow: "hidden",
-    shadowColor: "#000",
-    shadowOffset: { width: 0, height: 4 },
-    shadowOpacity: 0.2,
-    shadowRadius: 8,
-    elevation: 8,
-  },
-  menuItem: {
-    flexDirection: "row",
-    alignItems: "center",
-    gap: theme.spacing[2],
-    paddingHorizontal: theme.spacing[3],
-    paddingVertical: theme.spacing[2],
-  },
-  menuItemSelected: {
-    backgroundColor: theme.colors.surface2,
-  },
-  menuItemDisabled: {
-    opacity: 0.5,
-  },
-  menuItemText: {
-    fontSize: theme.fontSize.sm,
-    color: theme.colors.foreground,
-    fontWeight: theme.fontWeight.medium,
-  },
-  menuHintText: {
-    paddingHorizontal: theme.spacing[3],
-    paddingBottom: theme.spacing[2],
-    fontSize: theme.fontSize.xs,
-    color: theme.colors.foregroundMuted,
-  },
-  menuItemDestructive: {
-    backgroundColor: "rgba(248, 81, 73, 0.08)",
-  },
-  menuItemTextDestructive: {
-    color: theme.colors.destructive,
-  },
-  menuDivider: {
-    height: 1,
-    backgroundColor: theme.colors.border,
-  },
   actionErrorText: {
     paddingHorizontal: theme.spacing[3],
     paddingBottom: theme.spacing[1],

packages/app/src/components/headers/header-toggle-button.tsx

@@ -1,4 +1,4 @@
-import type { PropsWithChildren, ReactElement } from "react";
+import type { ReactElement, ReactNode } from "react";
 import {
   Platform,
   Text,
@@ -12,6 +12,21 @@ import { Tooltip, TooltipContent, TooltipTrigger } from "@/components/ui/tooltip
 import { Shortcut } from "@/components/ui/shortcut";
 import type { ShortcutKey } from "@/utils/format-shortcut";
 
+interface HeaderToggleButtonState {
+  hovered: boolean;
+  pressed: boolean;
+}
+
+interface HeaderToggleButtonProps extends Omit<PressableProps, "style" | "onPress" | "children"> {
+  onPress: NonNullable<PressableProps["onPress"]>;
+  tooltipLabel: string;
+  tooltipKeys: ShortcutKey[];
+  tooltipSide: "left" | "right" | "top" | "bottom";
+  tooltipDelayDuration?: number;
+  style?: StyleProp<ViewStyle>;
+  children: ReactNode | ((state: HeaderToggleButtonState) => ReactNode);
+}
+
 export function HeaderToggleButton({
   onPress,
   tooltipLabel,
@@ -22,16 +37,7 @@ export function HeaderToggleButton({
   disabled,
   children,
   ...props
-}: PropsWithChildren<
-  Omit<PressableProps, "style" | "onPress"> & {
-    onPress: NonNullable<PressableProps["onPress"]>;
-    tooltipLabel: string;
-    tooltipKeys: ShortcutKey[];
-    tooltipSide: "left" | "right" | "top" | "bottom";
-    tooltipDelayDuration?: number;
-    style?: StyleProp<ViewStyle>;
-  }
->): ReactElement {
+}: HeaderToggleButtonProps): ReactElement {
   const tooltipTestID =
     typeof props.testID === "string" && props.testID.length > 0
       ? `${props.testID}-tooltip`
@@ -53,7 +59,10 @@ export function HeaderToggleButton({
         }}
         style={[styles.button, style]}
       >
-        {children}
+        {typeof children === "function"
+          ? (state: { pressed: boolean; hovered?: boolean }) =>
+              children({ hovered: Boolean(state.hovered), pressed: state.pressed })
+          : children}
       </TooltipTrigger>
       <TooltipContent testID={tooltipTestID} side={tooltipSide} align="center" offset={8}>
         <View style={styles.tooltipRow}>

packages/app/src/components/icons/source-control-panel-icon.tsx

@@ -0,0 +1,32 @@
+import Svg, { Rect, Line } from "react-native-svg";
+
+interface SourceControlPanelIconProps {
+  size?: number;
+  color?: string;
+}
+
+export function SourceControlPanelIcon({
+  size = 16,
+  color = "currentColor",
+}: SourceControlPanelIconProps) {
+  return (
+    <Svg width={size} height={size} viewBox="0 0 24 24" fill="none">
+      <Rect
+        x={3}
+        y={3}
+        width={18}
+        height={18}
+        rx={2}
+        stroke={color}
+        strokeWidth={2}
+        strokeLinecap="round"
+        strokeLinejoin="round"
+      />
+      {/* Plus */}
+      <Line x1={9} y1={9.5} x2={15} y2={9.5} stroke={color} strokeWidth={2} strokeLinecap="round" />
+      <Line x1={12} y1={6.5} x2={12} y2={12.5} stroke={color} strokeWidth={2} strokeLinecap="round" />
+      {/* Minus */}
+      <Line x1={9} y1={16} x2={15} y2={16} stroke={color} strokeWidth={2} strokeLinecap="round" />
+    </Svg>
+  );
+}

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

@@ -339,7 +339,7 @@ export function LeftSidebar({ selectedAgentId: _selectedAgentId }: LeftSidebarPr
                             hovered && styles.newAgentButtonTextHovered,
                           ]}
                         >
-                          Open project
+                          Add project
                         </Text>
                       </>
                     )}
@@ -463,7 +463,7 @@ export function LeftSidebar({ selectedAgentId: _selectedAgentId }: LeftSidebarPr
                 <Text
                   style={[styles.newAgentButtonText, hovered && styles.newAgentButtonTextHovered]}
                 >
-                  Open project
+                  Add project
                 </Text>
               </>
             )}

packages/app/src/components/message-input.tsx

@@ -101,6 +101,7 @@ export interface MessageInputRef {
 const MIN_INPUT_HEIGHT = 30
 const MAX_INPUT_HEIGHT = 160
 const IS_WEB = Platform.OS === 'web'
+const IS_DEV = Boolean((globalThis as { __DEV__?: boolean }).__DEV__)
 
 type WebTextInputKeyPressEvent = NativeSyntheticEvent<
   TextInputKeyPressEventData & {
@@ -112,12 +113,68 @@ type WebTextInputKeyPressEvent = NativeSyntheticEvent<
 
 type TextAreaHandle = {
   scrollHeight?: number
+  clientHeight?: number
+  offsetHeight?: number
+  scrollTop?: number
+  selectionStart?: number | null
+  selectionEnd?: number | null
   style?: {
     height?: string
     overflowY?: string
   } & Record<string, unknown>
 }
 
+function logWebStickyBottom(
+  event: string,
+  details: Record<string, unknown>
+): void {
+  if (!IS_DEV || !IS_WEB) {
+    return
+  }
+  console.log('[WebStickyBottom]', event, details)
+}
+
+function getDebugNow(): number | null {
+  if (typeof performance !== 'undefined' && typeof performance.now === 'function') {
+    return Number(performance.now().toFixed(3))
+  }
+  return null
+}
+
+function getElementDescriptor(element: HTMLElement | null): string | null {
+  if (!element) return null
+  const tag = element.tagName?.toLowerCase() ?? 'unknown'
+  const id = element.id ? `#${element.id}` : ''
+  const testId = element.getAttribute?.('data-testid')
+  const label = element.getAttribute?.('aria-label')
+  const suffix = testId
+    ? `[data-testid="${testId}"]`
+    : label
+      ? `[aria-label="${label}"]`
+      : ''
+  return `${tag}${id}${suffix}`
+}
+
+function getScrollableAncestorChain(element: HTMLElement | null): string[] {
+  if (!element || typeof window === 'undefined') {
+    return []
+  }
+  const results: string[] = []
+  let current = element.parentElement
+  while (current) {
+    const style = window.getComputedStyle(current)
+    const overflowY = style.overflowY
+    const canScroll =
+      (overflowY === 'auto' || overflowY === 'scroll' || overflowY === 'overlay') &&
+      current.scrollHeight > current.clientHeight
+    if (canScroll) {
+      results.push(getElementDescriptor(current) ?? current.tagName.toLowerCase())
+    }
+    current = current.parentElement
+  }
+  return results
+}
+
 function ImageAttachmentThumbnail({ image }: { image: ImageAttachment }) {
   const uri = useAttachmentPreviewUrl(image)
   if (!uri) {
@@ -164,6 +221,8 @@ export const MessageInput = forwardRef<MessageInputRef, MessageInputProps>(funct
   const toast = useToast()
   const voice = useVoiceOptional()
   const [inputHeight, setInputHeight] = useState(MIN_INPUT_HEIGHT)
+  const rootRef = useRef<View | null>(null)
+  const inputWrapperRef = useRef<View | null>(null)
   const textInputRef = useRef<TextInput | (TextInput & { getNativeRef?: () => unknown }) | null>(
     null
   )
@@ -509,6 +568,12 @@ export const MessageInput = forwardRef<MessageInputRef, MessageInputProps>(funct
     return null
   }, [])
 
+  const getWebElement = useCallback((target: 'root' | 'wrapper'): HTMLElement | null => {
+    const ref = target === 'root' ? rootRef.current : inputWrapperRef.current
+    if (!ref) return null
+    return ref instanceof HTMLElement ? ref : ((ref as unknown as { getBoundingClientRect?: () => DOMRect }).getBoundingClientRect ? (ref as unknown as HTMLElement) : null)
+  }, [])
+
   useEffect(() => {
     if (!IS_WEB || !onAddImages) {
       return
@@ -562,36 +627,125 @@ export const MessageInput = forwardRef<MessageInputRef, MessageInputProps>(funct
     onAddImages,
   ])
 
+  useEffect(() => {
+    if (!IS_WEB || typeof ResizeObserver === 'undefined') {
+      return
+    }
+
+    const textarea = getWebTextArea()
+    const root = getWebElement('root')
+    const wrapper = getWebElement('wrapper')
+    const observed = [
+      { name: 'composer_root', element: root },
+      { name: 'composer_wrapper', element: wrapper },
+      { name: 'composer_textarea', element: textarea as unknown as HTMLElement | null },
+    ].filter((entry): entry is { name: string; element: HTMLElement } => entry.element instanceof HTMLElement)
+
+    if (observed.length === 0) {
+      return
+    }
+
+    const observer = new ResizeObserver((entries) => {
+      for (const entry of entries) {
+        const target = entry.target as HTMLElement
+        const match = observed.find((item) => item.element === target)
+        if (!match) {
+          continue
+        }
+        const textareaNode = getWebTextArea()
+        logWebStickyBottom('composer_element_resized', {
+          target: match.name,
+          width: target.clientWidth,
+          height: target.clientHeight,
+          offsetHeight: target.offsetHeight,
+          scrollHeight: target.scrollHeight,
+          textareaClientHeight: textareaNode?.clientHeight ?? null,
+          textareaOffsetHeight: textareaNode?.offsetHeight ?? null,
+          textareaScrollHeight: textareaNode?.scrollHeight ?? null,
+          textareaScrollTop: (textareaNode as unknown as HTMLTextAreaElement | null)?.scrollTop ?? null,
+          valueLength: valueRef.current.length,
+        })
+      }
+    })
+
+    for (const entry of observed) {
+      observer.observe(entry.element)
+    }
+
+    return () => {
+      observer.disconnect()
+    }
+  }, [getWebElement, getWebTextArea])
+
+  useEffect(() => {
+    if (!IS_WEB) {
+      return
+    }
+    const textarea = getWebTextArea() as (HTMLTextAreaElement & TextAreaHandle) | null
+    if (!textarea || typeof textarea.addEventListener !== 'function') {
+      return
+    }
+
+    const handleScroll = () => {
+      const textareaElement = textarea as unknown as HTMLElement
+      const chatScroller =
+        typeof document !== 'undefined'
+          ? (document.querySelector('[data-testid="agent-chat-scroll"]') as HTMLElement | null)
+          : null
+      logWebStickyBottom('composer_textarea_scrolled', {
+        now: getDebugNow(),
+        scrollTop: textarea.scrollTop,
+        clientHeight: textarea.clientHeight ?? null,
+        scrollHeight: textarea.scrollHeight ?? null,
+        selectionStart: textarea.selectionStart ?? null,
+        selectionEnd: textarea.selectionEnd ?? null,
+        textareaDescriptor: getElementDescriptor(textareaElement),
+        chatScrollerDescriptor: getElementDescriptor(chatScroller),
+        chatScrollerContainsTextarea: Boolean(chatScroller && textareaElement && chatScroller.contains(textareaElement)),
+        textareaScrollableAncestors: getScrollableAncestorChain(textareaElement),
+        valueLength: valueRef.current.length,
+      })
+    }
+
+    textarea.addEventListener('scroll', handleScroll, { passive: true })
+    return () => {
+      textarea.removeEventListener('scroll', handleScroll)
+    }
+  }, [getWebTextArea])
+
   function measureWebInputHeight(source: string): boolean {
     if (!IS_WEB) return false
     const textarea = getWebTextArea()
     if (!textarea || typeof textarea.scrollHeight !== 'number') return false
-
-    const prevHeight = textarea.style?.height
-    const prevOverflow = textarea.style?.overflowY
-    if (textarea.style) {
-      textarea.style.height = 'auto'
-      textarea.style.overflowY = 'hidden'
-    }
-
     const scrollHeight = textarea.scrollHeight ?? 0
-    if (textarea.style) {
-      textarea.style.height = prevHeight ?? ''
-      textarea.style.overflowY = prevOverflow ?? ''
-    }
 
     if (baselineInputHeightRef.current === null && scrollHeight > 0) {
       baselineInputHeightRef.current = scrollHeight
+      logWebStickyBottom('composer_baseline_measured', {
+        source,
+        baseline: scrollHeight,
+      })
     }
 
     const baseline = baselineInputHeightRef.current ?? MIN_INPUT_HEIGHT
     const rawTarget = scrollHeight > 0 ? scrollHeight : baseline
     const bounded = Math.max(MIN_INPUT_HEIGHT, Math.min(MAX_INPUT_HEIGHT, rawTarget))
 
-    if (Math.abs(inputHeightRef.current - bounded) >= 1) {
+    const previousHeight = inputHeightRef.current
+    if (Math.abs(previousHeight - bounded) >= 1) {
       inputHeightRef.current = bounded
       setInputHeight(bounded)
       onHeightChange?.(bounded)
+      logWebStickyBottom('composer_height_changed', {
+        source,
+        previousHeight,
+        nextHeight: bounded,
+        scrollHeight,
+        clientHeight: textarea.clientHeight ?? null,
+        offsetHeight: textarea.offsetHeight ?? null,
+        baseline,
+        rawTarget,
+      })
       return true
     }
     return false
@@ -600,25 +754,51 @@ export const MessageInput = forwardRef<MessageInputRef, MessageInputProps>(funct
   function setBoundedInputHeight(nextHeight: number) {
     const bounded = Math.max(MIN_INPUT_HEIGHT, Math.min(MAX_INPUT_HEIGHT, nextHeight))
     if (Math.abs(inputHeightRef.current - bounded) < 1) return
+    const previousHeight = inputHeightRef.current
     inputHeightRef.current = bounded
     setInputHeight(bounded)
     onHeightChange?.(bounded)
+    logWebStickyBottom('composer_height_changed_native', {
+      previousHeight,
+      nextHeight: bounded,
+    })
   }
 
   function handleContentSizeChange(
     event: NativeSyntheticEvent<TextInputContentSizeChangeEventData>
   ) {
+    const contentHeight = event.nativeEvent.contentSize.height
     if (IS_WEB) {
-      measureWebInputHeight('contentSizeChange')
+      logWebStickyBottom('composer_content_size_change', {
+        reportedHeight: contentHeight,
+      })
+      if (baselineInputHeightRef.current === null && contentHeight > 0) {
+        baselineInputHeightRef.current = contentHeight
+        logWebStickyBottom('composer_baseline_measured', {
+          source: 'contentSizeChange',
+          baseline: contentHeight,
+        })
+      }
+      setBoundedInputHeight(contentHeight)
       return
     }
-    const contentHeight = event.nativeEvent.contentSize.height
     setBoundedInputHeight(contentHeight)
   }
 
   function handleSelectionChange(event: NativeSyntheticEvent<TextInputSelectionChangeEventData>) {
     const start = event.nativeEvent.selection?.start ?? 0
     const end = event.nativeEvent.selection?.end ?? start
+    if (IS_WEB) {
+      const textarea = getWebTextArea()
+      logWebStickyBottom('composer_selection_changed', {
+        now: getDebugNow(),
+        start,
+        end,
+        textareaScrollTop: textarea?.scrollTop ?? null,
+        textareaClientHeight: textarea?.clientHeight ?? null,
+        textareaScrollHeight: textarea?.scrollHeight ?? null,
+      })
+    }
     onSelectionChangeCallback?.({ start, end })
   }
 
@@ -674,14 +854,20 @@ export const MessageInput = forwardRef<MessageInputRef, MessageInputProps>(funct
     (nextValue: string) => {
       markScrollInvestigationEvent(investigationComponentId, 'inputChange')
       onChangeText(nextValue)
+      if (IS_WEB) {
+        logWebStickyBottom('composer_text_changed', {
+          valueLength: nextValue.length,
+          lineCount: nextValue.split('\n').length,
+        })
+      }
     },
     [investigationComponentId, onChangeText]
   )
 
   return (
-    <View style={styles.container} testID="message-input-root">
+    <View ref={rootRef} style={styles.container} testID="message-input-root">
       {/* Regular input */}
-      <Animated.View style={[styles.inputWrapper, inputAnimatedStyle]}>
+      <Animated.View ref={inputWrapperRef} style={[styles.inputWrapper, inputAnimatedStyle]}>
         {/* Image preview pills */}
         {hasImages && (
           <View style={styles.imagePreviewContainer} testID="message-input-image-preview">

packages/app/src/components/project-picker-modal.tsx

@@ -155,7 +155,7 @@ export function ProjectPickerModal() {
 
   // Keyboard navigation
   useEffect(() => {
-    if (!open) return;
+    if (!open || Platform.OS !== "web") return;
 
     function handler(event: KeyboardEvent) {
       const key = event.key;
@@ -200,7 +200,6 @@ export function ProjectPickerModal() {
     return () => window.removeEventListener("keydown", handler, true);
   }, [activeIndex, handleSelectPath, handleSubmitCustom, open, options, query, setOpen]);
 
-  if (Platform.OS !== "web") return null;
   if (!serverId) return null;
 
   return (

packages/app/src/components/sidebar-workspace-list.tsx

@@ -665,11 +665,6 @@ function WorkspaceRowInner({
           </Text>
         </View>
         <View style={styles.workspaceRowRight}>
-          {showShortcutBadge && shortcutNumber !== null ? (
-            <View style={styles.shortcutBadge}>
-              <Text style={styles.shortcutBadgeText}>{shortcutNumber}</Text>
-            </View>
-          ) : null}
           {onArchive && (isHovered || isMobile) ? (
             <DropdownMenu>
               <DropdownMenuTrigger
@@ -716,6 +711,11 @@ function WorkspaceRowInner({
               <Text style={styles.diffStatDeletions}>-{workspace.diffStat.deletions}</Text>
             </View>
           ) : null}
+          {showShortcutBadge && shortcutNumber !== null ? (
+            <View style={styles.shortcutBadge}>
+              <Text style={styles.shortcutBadgeText}>{shortcutNumber}</Text>
+            </View>
+          ) : null}
         </View>
       </Pressable>
     </View>
@@ -1772,7 +1772,7 @@ const styles = StyleSheet.create((theme) => ({
   shortcutBadgeText: {
     color: theme.colors.foregroundMuted,
     fontSize: theme.fontSize.xs,
-    fontWeight: '600',
+    fontWeight: theme.fontWeight.normal,
     lineHeight: 14,
   },
 }))

packages/app/src/components/stream-strategy-web.tsx

@@ -24,6 +24,7 @@ const USER_SCROLL_DELTA_EPSILON = 1
 const AUTO_SCROLL_BOTTOM_THRESHOLD_PX = 64
 const AUTO_SCROLL_RESUME_THRESHOLD_PX = 1
 const WEB_STREAM_SCROLLBAR_STYLE_ID = 'web-stream-viewport-scrollbar-style'
+const IS_DEV = Boolean((globalThis as { __DEV__?: boolean }).__DEV__)
 const WEB_STREAM_SCROLLBAR_STYLE = `
   #agent-chat-scroll-web-dom-scroll,
   #agent-chat-scroll-web-dom-virtualized {
@@ -39,6 +40,20 @@ const WEB_STREAM_SCROLLBAR_STYLE = `
   }
 `
 
+function logWebStickyBottom(event: string, details: Record<string, unknown>): void {
+  if (!IS_DEV) {
+    return
+  }
+  console.log('[WebStickyBottom]', event, details)
+}
+
+function getDebugNow(): number | null {
+  if (typeof performance !== 'undefined' && typeof performance.now === 'function') {
+    return Number(performance.now().toFixed(3))
+  }
+  return null
+}
+
 function isScrollContainerNearBottom(
   scrollContainer: Pick<HTMLElement, 'scrollTop' | 'clientHeight' | 'scrollHeight'>,
   thresholdPx = AUTO_SCROLL_BOTTOM_THRESHOLD_PX
@@ -119,6 +134,13 @@ function WebStreamViewport(props: StreamRenderInput & { isMobileBreakpoint: bool
   }
   const followOutputRef = useRef(followOutput)
   const lastKnownScrollTopRef = useRef(0)
+  const lastLoggedMetricsRef = useRef<{
+    scrollTop: number
+    clientWidth: number
+    clientHeight: number
+    scrollWidth: number
+    scrollHeight: number
+  } | null>(null)
   const pendingUserScrollUpIntentRef = useRef(false)
   const isPointerScrollActiveRef = useRef(false)
   const lastTouchClientYRef = useRef<number | null>(null)
@@ -156,6 +178,17 @@ function WebStreamViewport(props: StreamRenderInput & { isMobileBreakpoint: bool
       const viewportHeight = instance.scrollRect?.height ?? 0
       const scrollOffset = instance.scrollOffset ?? 0
       const remainingDistance = instance.getTotalSize() - (scrollOffset + viewportHeight)
+      logWebStickyBottom('virtualizer_item_size_change', {
+        agentId: props.agentId,
+        delta: _delta,
+        itemIndex: _item.index,
+        itemStart: _item.start,
+        itemSize: _item.size,
+        viewportHeight,
+        scrollOffset,
+        totalSize: instance.getTotalSize(),
+        remainingDistance,
+      })
       return remainingDistance > AUTO_SCROLL_BOTTOM_THRESHOLD_PX
     }
     return () => {
@@ -187,11 +220,21 @@ function WebStreamViewport(props: StreamRenderInput & { isMobileBreakpoint: bool
       if (isScrollContainerOverscrolledPastBottom(scrollContainer)) {
         return
       }
+      logWebStickyBottom('viewport_scroll_to_bottom', {
+        agentId: props.agentId,
+        behavior,
+        followOutput: followOutputRef.current,
+        scrollTop: scrollContainer.scrollTop,
+        clientWidth: scrollContainer.clientWidth,
+        clientHeight: scrollContainer.clientHeight,
+        scrollWidth: scrollContainer.scrollWidth,
+        scrollHeight: scrollContainer.scrollHeight,
+      })
       scrollElementToBottom(scrollContainer, behavior)
       lastKnownScrollTopRef.current = scrollContainer.scrollTop
       syncNearBottom(scrollContainer, onNearBottomChange)
     },
-    [onNearBottomChange]
+    [onNearBottomChange, props.agentId]
   )
 
   const scheduleStickToBottom = useCallback(
@@ -203,6 +246,15 @@ function WebStreamViewport(props: StreamRenderInput & { isMobileBreakpoint: bool
       if (pendingAutoScrollFrameRef.current !== null) {
         return
       }
+      logWebStickyBottom('viewport_schedule_stick_to_bottom', {
+        agentId: props.agentId,
+        followOutput: followOutputRef.current,
+        scrollTop: scrollContainer?.scrollTop ?? null,
+        clientWidth: scrollContainer?.clientWidth ?? null,
+        clientHeight: scrollContainer?.clientHeight ?? null,
+        scrollWidth: scrollContainer?.scrollWidth ?? null,
+        scrollHeight: scrollContainer?.scrollHeight ?? null,
+      })
       pendingAutoScrollFrameRef.current = window.requestAnimationFrame(() => {
         pendingAutoScrollFrameRef.current = null
         if (!followOutputRef.current) {
@@ -211,7 +263,7 @@ function WebStreamViewport(props: StreamRenderInput & { isMobileBreakpoint: bool
         scrollMessagesToBottom('auto')
       })
     },
-    [scrollMessagesToBottom]
+    [props.agentId, scrollMessagesToBottom]
   )
 
   const forceStickToBottom = useCallback(() => {
@@ -254,7 +306,31 @@ function WebStreamViewport(props: StreamRenderInput & { isMobileBreakpoint: bool
       },
     } as never)
     syncNearBottom(scrollContainer, onNearBottomChange)
-  }, [onNearBottomChange, streamScrollbarMetrics])
+    const currentMetrics = {
+      scrollTop: scrollContainer.scrollTop,
+      clientWidth: scrollContainer.clientWidth,
+      clientHeight: scrollContainer.clientHeight,
+      scrollWidth: scrollContainer.scrollWidth,
+      scrollHeight: scrollContainer.scrollHeight,
+    }
+    const previousMetrics = lastLoggedMetricsRef.current
+    const shouldLog =
+      !previousMetrics ||
+      previousMetrics.scrollTop !== currentMetrics.scrollTop ||
+      previousMetrics.clientWidth !== currentMetrics.clientWidth ||
+      previousMetrics.clientHeight !== currentMetrics.clientHeight ||
+      previousMetrics.scrollWidth !== currentMetrics.scrollWidth ||
+      previousMetrics.scrollHeight !== currentMetrics.scrollHeight
+    if (shouldLog) {
+      lastLoggedMetricsRef.current = currentMetrics
+      logWebStickyBottom('viewport_metrics_updated', {
+        agentId: props.agentId,
+        followOutput: followOutputRef.current,
+        distanceFromBottom: getScrollContainerDistanceFromBottom(scrollContainer),
+        ...currentMetrics,
+      })
+    }
+  }, [onNearBottomChange, props.agentId, streamScrollbarMetrics])
 
   const handleDomScroll = useCallback(() => {
     const scrollContainer = scrollContainerRef.current
@@ -283,6 +359,19 @@ function WebStreamViewport(props: StreamRenderInput & { isMobileBreakpoint: bool
     }
 
     lastKnownScrollTopRef.current = currentScrollTop
+    logWebStickyBottom('viewport_dom_scroll', {
+      agentId: props.agentId,
+      now: getDebugNow(),
+      scrollTop: currentScrollTop,
+      clientHeight: scrollContainer.clientHeight,
+      scrollHeight: scrollContainer.scrollHeight,
+      activeElementTag:
+        typeof document !== 'undefined' ? document.activeElement?.tagName?.toLowerCase() ?? null : null,
+      activeElementRole:
+        typeof document !== 'undefined'
+          ? document.activeElement?.getAttribute?.('aria-label') ?? null
+          : null,
+    })
     updateScrollMetrics()
   }, [cancelPendingStickToBottom, updateScrollMetrics])
 
@@ -348,6 +437,15 @@ function WebStreamViewport(props: StreamRenderInput & { isMobileBreakpoint: bool
 
     updateScrollMetrics()
     const observer = new ResizeObserver(() => {
+      logWebStickyBottom('viewport_resize_observed', {
+        agentId: props.agentId,
+        followOutput: followOutputRef.current,
+        scrollTop: scrollContainer.scrollTop,
+        clientWidth: scrollContainer.clientWidth,
+        clientHeight: scrollContainer.clientHeight,
+        scrollWidth: scrollContainer.scrollWidth,
+        scrollHeight: scrollContainer.scrollHeight,
+      })
       updateScrollMetrics()
       if (!followOutputRef.current) {
         return
@@ -361,7 +459,7 @@ function WebStreamViewport(props: StreamRenderInput & { isMobileBreakpoint: bool
     return () => {
       observer.disconnect()
     }
-  }, [scheduleStickToBottom, updateScrollMetrics])
+  }, [props.agentId, scheduleStickToBottom, updateScrollMetrics])
 
   useEffect(() => {
     const scrollContainer = scrollContainerRef.current
@@ -369,6 +467,59 @@ function WebStreamViewport(props: StreamRenderInput & { isMobileBreakpoint: bool
       return
     }
 
+    const originalScrollTo = scrollContainer.scrollTo.bind(scrollContainer)
+    const scrollTopDescriptor =
+      Object.getOwnPropertyDescriptor(Object.getPrototypeOf(scrollContainer), 'scrollTop') ??
+      Object.getOwnPropertyDescriptor(Element.prototype, 'scrollTop')
+    scrollContainer.scrollTo = ((...args: Parameters<HTMLElement['scrollTo']>) => {
+      const firstArg = args[0] as ScrollToOptions | number | undefined
+      const target =
+        typeof firstArg === 'object' && firstArg !== null
+          ? {
+              top: firstArg.top ?? null,
+              left: firstArg.left ?? null,
+              behavior: firstArg.behavior ?? null,
+            }
+          : {
+              top: typeof args[1] === 'number' ? args[1] : null,
+              left: typeof firstArg === 'number' ? firstArg : null,
+              behavior: null,
+            }
+      logWebStickyBottom('viewport_scroll_to_called', {
+        agentId: props.agentId,
+        now: getDebugNow(),
+        currentScrollTop: scrollContainer.scrollTop,
+        target,
+        stack:
+          typeof Error !== 'undefined'
+            ? new Error().stack?.split('\n').slice(1, 6).join('\n') ?? null
+            : null,
+      })
+      return originalScrollTo(...args)
+    }) as typeof scrollContainer.scrollTo
+    if (scrollTopDescriptor?.get && scrollTopDescriptor?.set) {
+      Object.defineProperty(scrollContainer, 'scrollTop', {
+        configurable: true,
+        enumerable: scrollTopDescriptor.enumerable ?? false,
+        get() {
+          return scrollTopDescriptor.get?.call(scrollContainer)
+        },
+        set(value: number) {
+          logWebStickyBottom('viewport_scroll_top_set', {
+            agentId: props.agentId,
+            now: getDebugNow(),
+            currentScrollTop: scrollTopDescriptor.get?.call(scrollContainer) ?? null,
+            nextScrollTop: value,
+            stack:
+              typeof Error !== 'undefined'
+                ? new Error().stack?.split('\n').slice(1, 6).join('\n') ?? null
+                : null,
+          })
+          return scrollTopDescriptor.set?.call(scrollContainer, value)
+        },
+      })
+    }
+
     const handleWheel = (event: WheelEvent) => {
       if (event.deltaY < 0) {
         pendingUserScrollUpIntentRef.current = true
@@ -403,6 +554,25 @@ function WebStreamViewport(props: StreamRenderInput & { isMobileBreakpoint: bool
     const handleTouchEnd = () => {
       lastTouchClientYRef.current = null
     }
+    const handleSelectionChange = () => {
+      const activeElement =
+        typeof document !== 'undefined' ? (document.activeElement as HTMLTextAreaElement | null) : null
+      logWebStickyBottom('document_selection_changed', {
+        agentId: props.agentId,
+        now: getDebugNow(),
+        activeElementTag: activeElement?.tagName?.toLowerCase() ?? null,
+        activeElementRole: activeElement?.getAttribute?.('aria-label') ?? null,
+        selectionStart:
+          activeElement && typeof activeElement.selectionStart === 'number'
+            ? activeElement.selectionStart
+            : null,
+        selectionEnd:
+          activeElement && typeof activeElement.selectionEnd === 'number'
+            ? activeElement.selectionEnd
+            : null,
+        scrollTop: scrollContainer.scrollTop,
+      })
+    }
 
     scrollContainer.addEventListener('scroll', handleDomScroll, { passive: true })
     scrollContainer.addEventListener('wheel', handleWheel, { passive: true })
@@ -413,6 +583,9 @@ function WebStreamViewport(props: StreamRenderInput & { isMobileBreakpoint: bool
     scrollContainer.addEventListener('touchmove', handleTouchMove, { passive: true })
     scrollContainer.addEventListener('touchend', handleTouchEnd, { passive: true })
     scrollContainer.addEventListener('touchcancel', handleTouchEnd, { passive: true })
+    if (typeof document !== 'undefined') {
+      document.addEventListener('selectionchange', handleSelectionChange, { passive: true })
+    }
 
     return () => {
       scrollContainer.removeEventListener('scroll', handleDomScroll)
@@ -424,8 +597,15 @@ function WebStreamViewport(props: StreamRenderInput & { isMobileBreakpoint: bool
       scrollContainer.removeEventListener('touchmove', handleTouchMove)
       scrollContainer.removeEventListener('touchend', handleTouchEnd)
       scrollContainer.removeEventListener('touchcancel', handleTouchEnd)
+      scrollContainer.scrollTo = originalScrollTo
+      if (scrollTopDescriptor) {
+        Reflect.deleteProperty(scrollContainer, 'scrollTop')
+      }
+      if (typeof document !== 'undefined') {
+        document.removeEventListener('selectionchange', handleSelectionChange)
+      }
     }
-  }, [cancelPendingStickToBottom, handleDomScroll])
+  }, [cancelPendingStickToBottom, handleDomScroll, props.agentId])
 
   useEffect(() => {
     const handle: StreamViewportHandle = {
@@ -438,6 +618,16 @@ function WebStreamViewport(props: StreamRenderInput & { isMobileBreakpoint: bool
         if (!followOutputRef.current) {
           return
         }
+        const scrollContainer = scrollContainerRef.current
+        logWebStickyBottom('viewport_prepare_for_change', {
+          agentId: props.agentId,
+          followOutput: followOutputRef.current,
+          scrollTop: scrollContainer?.scrollTop ?? null,
+          clientWidth: scrollContainer?.clientWidth ?? null,
+          clientHeight: scrollContainer?.clientHeight ?? null,
+          scrollWidth: scrollContainer?.scrollWidth ?? null,
+          scrollHeight: scrollContainer?.scrollHeight ?? null,
+        })
         scheduleStickToBottom()
       },
     }
@@ -448,7 +638,7 @@ function WebStreamViewport(props: StreamRenderInput & { isMobileBreakpoint: bool
       }
       cancelPendingStickToBottom()
     }
-  }, [cancelPendingStickToBottom, forceStickToBottom, scheduleStickToBottom, viewportRef])
+  }, [cancelPendingStickToBottom, forceStickToBottom, props.agentId, scheduleStickToBottom, viewportRef])
 
   const contentContainerStyle = useMemo(
     (): CSSProperties => ({