Fix desktop layout and window controls at half-screen width (#1983)

* fix(app): preserve desktop layout in half-screen windows

Treat native window controls as physical corner obstructions instead of deriving clearance from compact layout state. Keep 751px windows in desktop mode while preserving usable content when persisted sidebars are wide.

* fix(app): retain sidebar width across window resizes

* fix(app): yield app sidebar to narrow settings

* test(app): wait for mobile sidebar motion to settle

* fix(app): yield navigation to narrow workspace explorer

* fix(app): mark sidebar sizing helpers as worklets

* fix(app): hide app navigation when space is constrained

packages/app/src/screens/workspace/workspace-screen.tsx

@@ -6,6 +6,7 @@ import {
   useRef,
   useState,
   type ReactElement,
+  type ComponentProps,
   type ReactNode,
 } from "react";
 import { useStoreWithEqualityFn } from "zustand/traditional";
@@ -61,6 +62,7 @@ import {
 import { ExplorerSidebar } from "@/components/explorer-sidebar";
 import { SplitContainer } from "@/components/split-container";
 import { RetainedPanel } from "@/components/retained-panel";
+import { WindowChromeRegion } from "@/utils/desktop-window";
 import { SourceControlPanelIcon } from "@/components/icons/source-control-panel-icon";
 import { WorkspaceActions } from "@/git/workspace-actions";
 import { WorkspaceOpenInEditorButton } from "@/screens/workspace/workspace-open-in-editor-button";
@@ -1566,6 +1568,46 @@ function shouldShowWorkspaceExplorerSidebar(input: {
   return !input.isMobile && input.isRouteFocused && shouldShowWorkspaceScreenHeader(input);
 }
 
+interface WorkspaceChromeRowProps extends Omit<
+  ComponentProps<typeof ExplorerSidebar>,
+  "workspaceRoot"
+> {
+  children: ReactNode;
+  explorerOpen: boolean;
+  portalHostName: string;
+  showExplorerSidebar: boolean;
+  workspaceRoot: string | null;
+}
+
+function WorkspaceChromeRow({
+  children,
+  explorerOpen,
+  portalHostName,
+  showExplorerSidebar,
+  workspaceRoot,
+  ...explorerProps
+}: WorkspaceChromeRowProps) {
+  const explorerRendered = showExplorerSidebar && explorerOpen && workspaceRoot !== null;
+
+  return (
+    <View style={styles.threePaneRow}>
+      <WindowChromeRegion corners={explorerRendered ? "top-left" : "both"}>
+        <FloatingPanelPortalHostNameProvider hostName={portalHostName}>
+          {children}
+        </FloatingPanelPortalHostNameProvider>
+      </WindowChromeRegion>
+
+      <FloatingPanelPortalHost name={portalHostName} />
+
+      {showExplorerSidebar && workspaceRoot ? (
+        <WindowChromeRegion corners="top-right">
+          <ExplorerSidebar {...explorerProps} workspaceRoot={workspaceRoot} />
+        </WindowChromeRegion>
+      ) : null}
+    </View>
+  );
+}
+
 function buildWorkspaceTerminalScopeKey(serverId: string, workspaceId: string): string | null {
   if (!serverId || !workspaceId) {
     return null;
@@ -3624,23 +3666,18 @@ function WorkspaceScreenContent({
               workspaceId={normalizedWorkspaceId}
               isRouteFocused={isRouteFocused}
             />
-            <View style={styles.threePaneRow}>
-              <FloatingPanelPortalHostNameProvider hostName={workspaceFloatingPanelPortalHostName}>
-                {workspaceCenterColumn}
-              </FloatingPanelPortalHostNameProvider>
-
-              <FloatingPanelPortalHost name={workspaceFloatingPanelPortalHostName} />
-
-              {showExplorerSidebar && workspaceDirectory ? (
-                <ExplorerSidebar
-                  serverId={normalizedServerId}
-                  workspaceId={normalizedWorkspaceId}
-                  workspaceRoot={workspaceDirectory}
-                  isGit={isGitCheckout}
-                  onOpenFile={handleOpenFileFromExplorer}
-                />
-              ) : null}
-            </View>
+            <WorkspaceChromeRow
+              portalHostName={workspaceFloatingPanelPortalHostName}
+              showExplorerSidebar={showExplorerSidebar}
+              explorerOpen={isExplorerOpen}
+              serverId={normalizedServerId}
+              workspaceId={normalizedWorkspaceId}
+              workspaceRoot={workspaceDirectory}
+              isGit={isGitCheckout}
+              onOpenFile={handleOpenFileFromExplorer}
+            >
+              {workspaceCenterColumn}
+            </WorkspaceChromeRow>
             <ImportSessionSheet
               visible={isImportSheetVisible}
               client={client}