feat(keyboard): add Cmd+./Ctrl+. shortcut to toggle both sidebars

Reassign Cmd+. (Mac) and Ctrl+. (Win/Linux) from toggling the left
sidebar to toggling both sidebars at once. If either is open, both
close; if both are closed, both open. Left sidebar toggle on non-Mac
now uses Ctrl+B to match the Mac Cmd+B binding.

packages/app/src/app/_layout.tsx

@@ -264,6 +264,7 @@ function AppContainer({
   const daemons = useHosts();
   const toggleAgentList = usePanelStore((state) => state.toggleAgentList);
   const toggleFileExplorer = usePanelStore((state) => state.toggleFileExplorer);
+  const toggleBothSidebars = usePanelStore((state) => state.toggleBothSidebars);
 
   const isMobile = UnistylesRuntime.breakpoint === "xs" || UnistylesRuntime.breakpoint === "sm";
   const chromeEnabled = chromeEnabledOverride ?? daemons.length > 0;
@@ -274,6 +275,7 @@ function AppContainer({
     toggleAgentList,
     selectedAgentId,
     toggleFileExplorer,
+    toggleBothSidebars,
   });
 
   const containerStyle = useMemo(

packages/app/src/hooks/use-keyboard-shortcuts.ts

@@ -33,12 +33,14 @@ export function useKeyboardShortcuts({
   toggleAgentList,
   selectedAgentId,
   toggleFileExplorer,
+  toggleBothSidebars,
 }: {
   enabled: boolean;
   isMobile: boolean;
   toggleAgentList: () => void;
   selectedAgentId?: string;
   toggleFileExplorer?: () => void;
+  toggleBothSidebars?: () => void;
 }) {
   const pathname = usePathname();
   const hosts = useHosts();
@@ -228,6 +230,11 @@ export function useKeyboardShortcuts({
         case "sidebar.toggle.left":
           toggleAgentList();
           return true;
+        case "sidebar.toggle.both":
+          if (toggleBothSidebars) {
+            toggleBothSidebars();
+          }
+          return true;
         case "sidebar.toggle.right":
           if (!toggleFileExplorer) {
             return false;

packages/app/src/keyboard/actions.ts

@@ -35,6 +35,7 @@ export type KeyboardActionId =
   | "workspace.navigate.relative"
   | "sidebar.toggle.left"
   | "sidebar.toggle.right"
+  | "sidebar.toggle.both"
   | "command-center.toggle"
   | "shortcuts.dialog.toggle"
   | "workspace.terminal.new"

packages/app/src/keyboard/keyboard-shortcuts.ts

@@ -649,22 +649,16 @@ const SHORTCUT_BINDINGS: readonly ShortcutBinding[] = [
       keys: ["mod", "B"],
     },
   },
-  {
-    id: "sidebar-toggle-left-cmd-period-mac",
-    action: "sidebar.toggle.left",
-    combo: "Cmd+.",
-    when: { mac: true, commandCenter: false },
-  },
   {
     id: "sidebar-toggle-left-ctrl-period-non-mac",
     action: "sidebar.toggle.left",
-    combo: "Ctrl+.",
+    combo: "Ctrl+B",
     when: { mac: false, commandCenter: false, terminal: false },
     help: {
       id: "toggle-left-sidebar",
       section: "panels",
       label: "Toggle left sidebar",
-      keys: ["mod", "."],
+      keys: ["mod", "B"],
     },
   },
   {
@@ -698,6 +692,32 @@ const SHORTCUT_BINDINGS: readonly ShortcutBinding[] = [
     when: { hasSelectedAgent: true, commandCenter: false },
   },
 
+  // --- Toggle both sidebars ---
+  {
+    id: "sidebar-toggle-both-cmd-period-mac",
+    action: "sidebar.toggle.both",
+    combo: "Cmd+.",
+    when: { mac: true, commandCenter: false },
+    help: {
+      id: "toggle-both-sidebars",
+      section: "panels",
+      label: "Toggle both sidebars",
+      keys: ["mod", "."],
+    },
+  },
+  {
+    id: "sidebar-toggle-both-ctrl-period-non-mac",
+    action: "sidebar.toggle.both",
+    combo: "Ctrl+.",
+    when: { mac: false, commandCenter: false, terminal: false },
+    help: {
+      id: "toggle-both-sidebars",
+      section: "panels",
+      label: "Toggle both sidebars",
+      keys: ["mod", "."],
+    },
+  },
+
   // --- Message input ---
   {
     id: "message-input-voice-toggle-cmd-shift-d-mac",

packages/app/src/stores/panel-store.ts

@@ -78,6 +78,7 @@ interface PanelState {
   closeToAgent: () => void;
   toggleAgentList: () => void;
   toggleFileExplorer: () => void;
+  toggleBothSidebars: () => void;
 
   // File explorer settings actions
   setExplorerTab: (tab: ExplorerTab) => void;
@@ -216,6 +217,24 @@ export const usePanelStore = create<PanelState>()(
           return nextState;
         }),
 
+      toggleBothSidebars: () =>
+        set((state) => {
+          // If either sidebar is open, close both. Otherwise, open both.
+          const anyOpen = state.desktop.agentListOpen || state.desktop.fileExplorerOpen;
+          if (anyOpen) {
+            return {
+              mobileView: "agent" as MobilePanelView,
+              desktop: { agentListOpen: false, fileExplorerOpen: false },
+            };
+          }
+          const resolvedTab = resolveExplorerTabFromActiveCheckout(state);
+          return {
+            mobileView: "agent" as MobilePanelView,
+            desktop: { agentListOpen: true, fileExplorerOpen: true },
+            ...(resolvedTab ? { explorerTab: resolvedTab } : {}),
+          };
+        }),
+
       setExplorerTab: (tab) => set({ explorerTab: tab }),
       setExplorerTabForCheckout: ({ serverId, cwd, isGit, tab }) =>
         set((state) => {