diff --git a/packages/ui/src/components/session/NewWorktreeDialog.tsx b/packages/ui/src/components/session/NewWorktreeDialog.tsx
index f8926629..509e8eb0 100644
--- a/packages/ui/src/components/session/NewWorktreeDialog.tsx
+++ b/packages/ui/src/components/session/NewWorktreeDialog.tsx
@@ -1593,7 +1593,7 @@ export function NewWorktreeDialog({
                           <RiArrowDownSLine className="h-4 w-4 shrink-0 text-muted-foreground" />
                         </Button>
                       </DropdownMenuTrigger>
-                      <DropdownMenuContent align="start" sideOffset={6} className="w-[320px] p-0 max-h-[min(var(--available-height),24rem)] flex flex-col overflow-hidden" ref={existingBranchDropdownContentRef}>
+                      <DropdownMenuContent align="start" sideOffset={6} portalToBody className="w-[min(42rem,calc(100vw-2rem))] p-0 max-h-[min(var(--available-height),24rem)] flex flex-col overflow-hidden" ref={existingBranchDropdownContentRef}>
                         <Command shouldFilter={false}>
                         <CommandInput
                           placeholder={t('session.newWorktree.searchBranches')}
@@ -1833,7 +1833,7 @@ export function NewWorktreeDialog({
                         <RiArrowDownSLine className="h-4 w-4 shrink-0 text-muted-foreground" />
                       </Button>
                     </DropdownMenuTrigger>
-                    <DropdownMenuContent align="start" className="w-[320px] p-0" ref={sourceBranchDropdownContentRef}>
+                    <DropdownMenuContent align="start" portalToBody className="w-[min(42rem,calc(100vw-2rem))] p-0 max-h-[min(var(--available-height),24rem)] flex flex-col overflow-hidden" ref={sourceBranchDropdownContentRef}>
                       <Command shouldFilter={false}>
                         <CommandInput
                           placeholder={t('session.newWorktree.searchBranches')}
diff --git a/packages/ui/src/components/ui/dropdown-menu.tsx b/packages/ui/src/components/ui/dropdown-menu.tsx
index 640ca9d7..7f4f0c9e 100644
--- a/packages/ui/src/components/ui/dropdown-menu.tsx
+++ b/packages/ui/src/components/ui/dropdown-menu.tsx
@@ -93,6 +93,7 @@ type ContentProps = {
   align?: "start" | "center" | "end";
   side?: "top" | "right" | "bottom" | "left";
   alignOffset?: number;
+  portalToBody?: boolean;
   style?: React.CSSProperties;
   className?: string;
   children?: React.ReactNode;
@@ -105,6 +106,7 @@ function DropdownMenuContent({
   align,
   side,
   alignOffset,
+  portalToBody = false,
   style,
   children,
   onCloseAutoFocus,
@@ -114,7 +116,7 @@ function DropdownMenuContent({
   void onCloseAutoFocus
 
   return (
-    <BaseMenu.Portal container={portalContext?.portalContainer || undefined}>
+    <BaseMenu.Portal container={portalToBody ? undefined : portalContext?.portalContainer || undefined}>
       <BaseMenu.Positioner
         sideOffset={sideOffset}
         align={align}
diff --git a/packages/ui/src/components/views/SettingsView.tsx b/packages/ui/src/components/views/SettingsView.tsx
index 1f1b7dc2..ffecbda5 100644
--- a/packages/ui/src/components/views/SettingsView.tsx
+++ b/packages/ui/src/components/views/SettingsView.tsx
@@ -71,7 +71,6 @@ import {
 // Same constraints as main sidebar
 const SETTINGS_NAV_MIN_WIDTH = 176;
 const SETTINGS_NAV_MAX_WIDTH = 280;
-const SETTINGS_NAV_RAIL_WIDTH = 48;
 
 type MobileStage = 'nav' | 'page-sidebar' | 'page-content';
 
@@ -372,8 +371,7 @@ export const SettingsView: React.FC<SettingsViewProps> = ({ onClose, forceMobile
     return getSettingsPageMeta(settingsSlug);
   }, [settingsSlug]);
 
-  // Collapse main nav to icon rail when active page has its own sidebar
-  const isNavCollapsed = !isMobile && activePageMeta?.kind === 'split';
+  // Nav is always open (collapsed state removed)
 
   const openChamberSectionBySlug: Partial<Record<SettingsPageSlug, OpenChamberSection>> = React.useMemo(() => ({
     appearance: 'visual',
@@ -544,7 +542,7 @@ export const SettingsView: React.FC<SettingsViewProps> = ({ onClose, forceMobile
     setMobileStage('page-sidebar');
   }, []);
 
-  const renderSettingsNav = (collapsed: boolean) => {
+  const renderSettingsNav = () => {
     return (
       <div className="flex h-full flex-col overflow-hidden">
         {/* Scrollable nav items */}
@@ -556,7 +554,7 @@ export const SettingsView: React.FC<SettingsViewProps> = ({ onClose, forceMobile
               if (!Icon) return null;
 
               return (
-                <Tooltip key={page.slug} delayDuration={collapsed ? 100 : 600}>
+                <Tooltip key={page.slug} delayDuration={600}>
                   <TooltipTrigger asChild>
                     <button
                       type="button"
@@ -569,12 +567,7 @@ export const SettingsView: React.FC<SettingsViewProps> = ({ onClose, forceMobile
                       )}
                     >
                       <Icon className="h-4 w-4 shrink-0" />
-                      <span
-                        className={cn(
-                          'flex items-center gap-1.5 whitespace-nowrap overflow-hidden transition-opacity duration-150',
-                          collapsed ? 'opacity-0' : 'opacity-100'
-                        )}
-                      >
+                      <span className="flex items-center gap-1.5 whitespace-nowrap overflow-hidden transition-opacity duration-150 opacity-100">
                         <span className="typography-ui-label font-normal truncate">{getPageTitle(page.slug)}</span>
                         {(page.slug === 'voice' || page.slug === 'tunnel') && (
                           <span className="shrink-0 typography-micro px-1 rounded leading-none pb-px text-[var(--status-warning)] bg-[var(--status-warning)]/10">
@@ -584,24 +577,14 @@ export const SettingsView: React.FC<SettingsViewProps> = ({ onClose, forceMobile
                       </span>
                     </button>
                   </TooltipTrigger>
-                  {collapsed && (
-                    <TooltipContent side="right" sideOffset={8}>
-                      {getPageTitle(page.slug)}
-                    </TooltipContent>
-                  )}
                 </Tooltip>
               );
             })}
           </div>
         </div>
 
-        {/* Footer — hidden when collapsed via overflow on parent */}
-        <div
-          className={cn(
-            'overflow-hidden transition-opacity duration-150',
-            collapsed ? 'opacity-0 pointer-events-none' : 'opacity-100'
-          )}
-        >
+        {/* Footer */}
+        <div className="overflow-hidden transition-opacity duration-150 opacity-100">
           <div className="border-t border-border bg-sidebar px-2 py-1 space-y-0.5">
             {!runtimeCtx.isVSCode && (
               <Tooltip delayDuration={300}>
@@ -636,7 +619,7 @@ export const SettingsView: React.FC<SettingsViewProps> = ({ onClose, forceMobile
       return (
         <div className={cn('flex-1 min-h-0 overflow-hidden', runtimeCtx.isVSCode ? 'bg-background' : 'bg-sidebar')}>
           <div className="flex h-full min-h-0 flex-col">
-            <ErrorBoundary>{renderSettingsNav(false)}</ErrorBoundary>
+            <ErrorBoundary>{renderSettingsNav()}</ErrorBoundary>
           </div>
         </div>
       );
@@ -686,16 +669,20 @@ export const SettingsView: React.FC<SettingsViewProps> = ({ onClose, forceMobile
           <div className={cn('w-[264px] min-w-[264px] border-r', runtimeCtx.isVSCode ? 'bg-background' : 'bg-sidebar')} style={{ borderColor: 'var(--interactive-border)' }}>
             <ErrorBoundary>{renderPageSidebar(settingsSlug, {})}</ErrorBoundary>
           </div>
-          <div className="flex-1 overflow-hidden bg-background">
-            <ErrorBoundary>{renderPageContent(settingsSlug)}</ErrorBoundary>
+          <div className="flex-1 overflow-auto scrollbar-none bg-background">
+            <div className="mx-auto w-full max-w-3xl">
+              <ErrorBoundary>{renderPageContent(settingsSlug)}</ErrorBoundary>
+            </div>
           </div>
         </div>
       );
     }
 
     return (
-      <div className="h-full overflow-hidden bg-background">
-        <ErrorBoundary>{renderPageContent(settingsSlug)}</ErrorBoundary>
+      <div className="h-full overflow-auto scrollbar-none bg-background">
+        <div className="mx-auto w-full max-w-3xl">
+          <ErrorBoundary>{renderPageContent(settingsSlug)}</ErrorBoundary>
+        </div>
       </div>
     );
   };
@@ -792,28 +779,26 @@ export const SettingsView: React.FC<SettingsViewProps> = ({ onClose, forceMobile
                   : runtimeCtx.isVSCode
                     ? 'bg-background'
                     : 'bg-sidebar',
-                isResizing && !isNavCollapsed ? '' : 'transition-[width,min-width] duration-200 ease-[cubic-bezier(0.25,0.1,0.25,1)]'
+                isResizing ? '' : 'transition-[width,min-width] duration-200 ease-[cubic-bezier(0.25,0.1,0.25,1)]'
               )}
               style={{
-                width: isNavCollapsed ? `${SETTINGS_NAV_RAIL_WIDTH}px` : `${navWidth}px`,
-                minWidth: isNavCollapsed ? `${SETTINGS_NAV_RAIL_WIDTH}px` : `${navWidth}px`,
+                width: `${navWidth}px`,
+                minWidth: `${navWidth}px`,
                 borderColor: 'var(--interactive-border)',
               }}
             >
-              {!isNavCollapsed && (
-                <div
-                  className={cn(
-                    'absolute right-0 top-0 z-20 h-full w-[6px] -mr-[3px] cursor-col-resize',
-                    isResizing ? 'bg-primary/30' : 'bg-transparent hover:bg-primary/20'
-                  )}
-                  onPointerDown={handlePointerDown}
-                  role="separator"
-                  aria-orientation="vertical"
-                  aria-label={t('settings.view.actions.resizeNavigation')}
-                />
-              )}
+              <div
+                className={cn(
+                  'absolute right-0 top-0 z-20 h-full w-[6px] -mr-[3px] cursor-col-resize',
+                  isResizing ? 'bg-primary/30' : 'bg-transparent hover:bg-primary/20'
+                )}
+                onPointerDown={handlePointerDown}
+                role="separator"
+                aria-orientation="vertical"
+                aria-label={t('settings.view.actions.resizeNavigation')}
+              />
               <ErrorBoundary>
-                {renderSettingsNav(isNavCollapsed)}
+                {renderSettingsNav()}
               </ErrorBoundary>
             </div>
 
diff --git a/packages/ui/src/components/views/SettingsWindow.tsx b/packages/ui/src/components/views/SettingsWindow.tsx
index c4923797..00e961f2 100644
--- a/packages/ui/src/components/views/SettingsWindow.tsx
+++ b/packages/ui/src/components/views/SettingsWindow.tsx
@@ -41,7 +41,7 @@ export const SettingsWindow: React.FC<SettingsWindowProps> = ({ open, onOpenChan
           aria-describedby={descriptionId}
           className={cn(
             'fixed z-50 top-[50%] left-[50%] translate-x-[-50%] translate-y-[-50%]',
-            'w-[90vw] max-w-[960px] h-[85vh] max-h-[900px]',
+            'w-[90vw] max-w-[1200px] h-[85vh] max-h-[900px]',
             'rounded-xl border shadow-none overflow-hidden',
             'bg-background'
           )}