fix: reserve Windows titlebar chrome space for Code actions

src/pages/Chat/CodingConversationHeader.tsx

@@ -20,6 +20,7 @@ import {
 import { Input } from '@/components/ui/input';
 import { cn } from '@/lib/utils';
 import { useSettingsStore } from '@/stores/settings';
+import { TITLEBAR_LOGO_WIDTH, WINDOWS_TITLEBAR_CONTROLS_WIDTH } from '@/components/layout/titlebar-metrics';
 import type { ConversationSnapshot } from '@/types/coding-conversation';
 import type { CodingConversationMetadata } from '@/types/coding-project';
 
@@ -110,7 +111,8 @@ export function CodingConversationHeader({
     <header
       className={cn(
         'drag-region flex h-10 min-w-0 items-center gap-1 border-b border-border/80 px-3',
-        hasCustomTitleBar ? 'bg-transparent pr-40' : 'bg-background',
+        hasCustomTitleBar ? 'bg-transparent' : 'bg-background',
+        platform === 'darwin' && 'pr-40',
       )}
       data-testid="coding-conversation-header"
     >
@@ -184,7 +186,11 @@ export function CodingConversationHeader({
             <div
               className="pointer-events-none fixed right-0 top-0 z-[80] h-10"
               data-testid="coding-conversation-header-titlebar"
-              style={{ left: `${sidebarCollapsed ? WORKSPACE_COLUMN_WIDTH : WORKSPACE_COLUMN_WIDTH * 2}px` }}
+              style={{
+                left: `${sidebarCollapsed ? WORKSPACE_COLUMN_WIDTH : WORKSPACE_COLUMN_WIDTH * 2}px`,
+                // Keep both actions and their hit area outside the product chrome.
+                right: platform === 'win32' ? TITLEBAR_LOGO_WIDTH + WINDOWS_TITLEBAR_CONTROLS_WIDTH : 0,
+              }}
             >
               <div className="pointer-events-auto h-full">{header}</div>
             </div>,