feat(13.1): add UserMenu component with avatar, Settings link, and Sign Out

- Install @radix-ui/react-dropdown-menu and add shadcn/ui dropdown-menu component
- Create src/components/user-menu.tsx: avatar button showing user initial,
  DropdownMenu with name/email label, Settings link (/app/settings), Sign Out
  (calls signOut with redirect to /login)
- Replace placeholder div in src/app/app/layout.tsx with <UserMenu />
- Remove now-redundant standalone Settings link from nav bar (Settings is in dropdown)
- Mark task 13.1 done in openspec/changes/user-accounts/tasks.md

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

openspec/changes/user-accounts/tasks.md

@@ -75,7 +75,7 @@
 
 ## 13. App Layout & User Menu
 
-- [ ] 13.1 `[sonnet]` Create user menu component: avatar/initial, dropdown with "Settings" and "Sign Out" links
+- [x] 13.1 `[sonnet]` Create user menu component: avatar/initial, dropdown with "Settings" and "Sign Out" links
 - [ ] 13.2 `[haiku]` Add settings gear icon to sidebar (near theme toggle)
 - [ ] 13.3 `[haiku]` Wire `signOut()` in user menu to destroy session and redirect to `/login`
 

package-lock.json

@@ -10,6 +10,7 @@
       "license": "ISC",
       "dependencies": {
         "@radix-ui/react-dialog": "^1.1.15",
+        "@radix-ui/react-dropdown-menu": "^2.1.16",
         "@radix-ui/react-label": "^2.1.8",
         "@radix-ui/react-select": "^2.2.6",
         "@radix-ui/react-slider": "^1.3.6",
@@ -2275,6 +2276,35 @@
         }
       }
     },
+    "node_modules/@radix-ui/react-dropdown-menu": {
+      "version": "2.1.16",
+      "resolved": "https://registry.npmjs.org/@radix-ui/react-dropdown-menu/-/react-dropdown-menu-2.1.16.tgz",
+      "integrity": "sha512-1PLGQEynI/3OX/ftV54COn+3Sud/Mn8vALg2rWnBLnRaGtJDduNW/22XjlGgPdpcIbiQxjKtb7BkcjP00nqfJw==",
+      "license": "MIT",
+      "dependencies": {
+        "@radix-ui/primitive": "1.1.3",
+        "@radix-ui/react-compose-refs": "1.1.2",
+        "@radix-ui/react-context": "1.1.2",
+        "@radix-ui/react-id": "1.1.1",
+        "@radix-ui/react-menu": "2.1.16",
+        "@radix-ui/react-primitive": "2.1.3",
+        "@radix-ui/react-use-controllable-state": "1.2.2"
+      },
+      "peerDependencies": {
+        "@types/react": "*",
+        "@types/react-dom": "*",
+        "react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc",
+        "react-dom": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+      },
+      "peerDependenciesMeta": {
+        "@types/react": {
+          "optional": true
+        },
+        "@types/react-dom": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/@radix-ui/react-focus-guards": {
       "version": "1.1.3",
       "resolved": "https://registry.npmjs.org/@radix-ui/react-focus-guards/-/react-focus-guards-1.1.3.tgz",
@@ -2397,6 +2427,46 @@
         }
       }
     },
+    "node_modules/@radix-ui/react-menu": {
+      "version": "2.1.16",
+      "resolved": "https://registry.npmjs.org/@radix-ui/react-menu/-/react-menu-2.1.16.tgz",
+      "integrity": "sha512-72F2T+PLlphrqLcAotYPp0uJMr5SjP5SL01wfEspJbru5Zs5vQaSHb4VB3ZMJPimgHHCHG7gMOeOB9H3Hdmtxg==",
+      "license": "MIT",
+      "dependencies": {
+        "@radix-ui/primitive": "1.1.3",
+        "@radix-ui/react-collection": "1.1.7",
+        "@radix-ui/react-compose-refs": "1.1.2",
+        "@radix-ui/react-context": "1.1.2",
+        "@radix-ui/react-direction": "1.1.1",
+        "@radix-ui/react-dismissable-layer": "1.1.11",
+        "@radix-ui/react-focus-guards": "1.1.3",
+        "@radix-ui/react-focus-scope": "1.1.7",
+        "@radix-ui/react-id": "1.1.1",
+        "@radix-ui/react-popper": "1.2.8",
+        "@radix-ui/react-portal": "1.1.9",
+        "@radix-ui/react-presence": "1.1.5",
+        "@radix-ui/react-primitive": "2.1.3",
+        "@radix-ui/react-roving-focus": "1.1.11",
+        "@radix-ui/react-slot": "1.2.3",
+        "@radix-ui/react-use-callback-ref": "1.1.1",
+        "aria-hidden": "^1.2.4",
+        "react-remove-scroll": "^2.6.3"
+      },
+      "peerDependencies": {
+        "@types/react": "*",
+        "@types/react-dom": "*",
+        "react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc",
+        "react-dom": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+      },
+      "peerDependenciesMeta": {
+        "@types/react": {
+          "optional": true
+        },
+        "@types/react-dom": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/@radix-ui/react-popper": {
       "version": "1.2.8",
       "resolved": "https://registry.npmjs.org/@radix-ui/react-popper/-/react-popper-1.2.8.tgz",
@@ -2500,6 +2570,37 @@
         }
       }
     },
+    "node_modules/@radix-ui/react-roving-focus": {
+      "version": "1.1.11",
+      "resolved": "https://registry.npmjs.org/@radix-ui/react-roving-focus/-/react-roving-focus-1.1.11.tgz",
+      "integrity": "sha512-7A6S9jSgm/S+7MdtNDSb+IU859vQqJ/QAtcYQcfFC6W8RS4IxIZDldLR0xqCFZ6DCyrQLjLPsxtTNch5jVA4lA==",
+      "license": "MIT",
+      "dependencies": {
+        "@radix-ui/primitive": "1.1.3",
+        "@radix-ui/react-collection": "1.1.7",
+        "@radix-ui/react-compose-refs": "1.1.2",
+        "@radix-ui/react-context": "1.1.2",
+        "@radix-ui/react-direction": "1.1.1",
+        "@radix-ui/react-id": "1.1.1",
+        "@radix-ui/react-primitive": "2.1.3",
+        "@radix-ui/react-use-callback-ref": "1.1.1",
+        "@radix-ui/react-use-controllable-state": "1.2.2"
+      },
+      "peerDependencies": {
+        "@types/react": "*",
+        "@types/react-dom": "*",
+        "react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc",
+        "react-dom": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+      },
+      "peerDependenciesMeta": {
+        "@types/react": {
+          "optional": true
+        },
+        "@types/react-dom": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/@radix-ui/react-select": {
       "version": "2.2.6",
       "resolved": "https://registry.npmjs.org/@radix-ui/react-select/-/react-select-2.2.6.tgz",

package.json

@@ -16,6 +16,7 @@
   "license": "ISC",
   "dependencies": {
     "@radix-ui/react-dialog": "^1.1.15",
+    "@radix-ui/react-dropdown-menu": "^2.1.16",
     "@radix-ui/react-label": "^2.1.8",
     "@radix-ui/react-select": "^2.2.6",
     "@radix-ui/react-slider": "^1.3.6",

src/app/app/layout.tsx

@@ -2,7 +2,7 @@
 
 import { SessionProvider } from 'next-auth/react';
 import Link from 'next/link';
-import { Settings } from 'lucide-react';
+import { UserMenu } from '@/components/user-menu';
 
 /**
  * Protected app layout.
@@ -12,10 +12,7 @@ import { Settings } from 'lucide-react';
  *
  * Contains a minimal top nav bar with:
  *  - App title / home link
- *  - Settings link (→ /app/settings)
+ *  - UserMenu component (avatar, settings link, sign-out)
- *  - Placeholder slot for the user menu (task 13.1)
- *
- * The full user-menu dropdown (avatar, sign-out, etc.) is wired up in task 13.1.
  */
 export default function AppLayout({
   children,
@@ -24,7 +21,6 @@ export default function AppLayout({
 }>) {
   return (
     <SessionProvider>
-      {/* Minimal nav bar — user menu dropdown added in task 13.1 */}
       <header className="fixed top-0 inset-x-0 z-50 h-10 flex items-center justify-between px-4 bg-background border-b border-border">
         <Link
           href="/app"
@@ -34,19 +30,7 @@ export default function AppLayout({
         </Link>
 
         <nav className="flex items-center gap-2">
-          {/* Settings link */}
+          <UserMenu />
-          <Link
-            href="/app/settings"
-            className="flex items-center gap-1.5 px-2 py-1 text-xs text-muted-foreground hover:text-foreground rounded hover:bg-secondary/50 transition-colors"
-          >
-            <Settings className="w-3.5 h-3.5" />
-            Settings
-          </Link>
-
-          {/* User menu placeholder — implemented in task 13.1 */}
-          <div className="w-7 h-7 rounded-full bg-secondary/50 flex items-center justify-center text-xs text-muted-foreground" aria-label="User menu (coming soon)">
-            ?
-          </div>
         </nav>
       </header>
 

src/components/ui/dropdown-menu.tsx

@@ -0,0 +1,200 @@
+"use client"
+
+import * as React from "react"
+import * as DropdownMenuPrimitive from "@radix-ui/react-dropdown-menu"
+import { Check, ChevronRight, Circle } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+const DropdownMenu = DropdownMenuPrimitive.Root
+
+const DropdownMenuTrigger = DropdownMenuPrimitive.Trigger
+
+const DropdownMenuGroup = DropdownMenuPrimitive.Group
+
+const DropdownMenuPortal = DropdownMenuPrimitive.Portal
+
+const DropdownMenuSub = DropdownMenuPrimitive.Sub
+
+const DropdownMenuRadioGroup = DropdownMenuPrimitive.RadioGroup
+
+const DropdownMenuSubTrigger = React.forwardRef<
+  React.ElementRef<typeof DropdownMenuPrimitive.SubTrigger>,
+  React.ComponentPropsWithoutRef<typeof DropdownMenuPrimitive.SubTrigger> & {
+    inset?: boolean
+  }
+>(({ className, inset, children, ...props }, ref) => (
+  <DropdownMenuPrimitive.SubTrigger
+    ref={ref}
+    className={cn(
+      "flex cursor-default select-none items-center gap-2 rounded-sm px-2 py-1.5 text-sm outline-none focus:bg-accent data-[state=open]:bg-accent [&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0",
+      inset && "pl-8",
+      className
+    )}
+    {...props}
+  >
+    {children}
+    <ChevronRight className="ml-auto" />
+  </DropdownMenuPrimitive.SubTrigger>
+))
+DropdownMenuSubTrigger.displayName =
+  DropdownMenuPrimitive.SubTrigger.displayName
+
+const DropdownMenuSubContent = React.forwardRef<
+  React.ElementRef<typeof DropdownMenuPrimitive.SubContent>,
+  React.ComponentPropsWithoutRef<typeof DropdownMenuPrimitive.SubContent>
+>(({ className, ...props }, ref) => (
+  <DropdownMenuPrimitive.SubContent
+    ref={ref}
+    className={cn(
+      "z-50 min-w-[8rem] overflow-hidden rounded-md border bg-popover p-1 text-popover-foreground shadow-lg data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 origin-[--radix-dropdown-menu-content-transform-origin]",
+      className
+    )}
+    {...props}
+  />
+))
+DropdownMenuSubContent.displayName =
+  DropdownMenuPrimitive.SubContent.displayName
+
+const DropdownMenuContent = React.forwardRef<
+  React.ElementRef<typeof DropdownMenuPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof DropdownMenuPrimitive.Content>
+>(({ className, sideOffset = 4, ...props }, ref) => (
+  <DropdownMenuPrimitive.Portal>
+    <DropdownMenuPrimitive.Content
+      ref={ref}
+      sideOffset={sideOffset}
+      className={cn(
+        "z-50 max-h-[var(--radix-dropdown-menu-content-available-height)] min-w-[8rem] overflow-y-auto overflow-x-hidden rounded-md border bg-popover p-1 text-popover-foreground shadow-md data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 origin-[--radix-dropdown-menu-content-transform-origin]",
+        className
+      )}
+      {...props}
+    />
+  </DropdownMenuPrimitive.Portal>
+))
+DropdownMenuContent.displayName = DropdownMenuPrimitive.Content.displayName
+
+const DropdownMenuItem = React.forwardRef<
+  React.ElementRef<typeof DropdownMenuPrimitive.Item>,
+  React.ComponentPropsWithoutRef<typeof DropdownMenuPrimitive.Item> & {
+    inset?: boolean
+  }
+>(({ className, inset, ...props }, ref) => (
+  <DropdownMenuPrimitive.Item
+    ref={ref}
+    className={cn(
+      "relative flex cursor-default select-none items-center gap-2 rounded-sm px-2 py-1.5 text-sm outline-none transition-colors focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50 [&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0",
+      inset && "pl-8",
+      className
+    )}
+    {...props}
+  />
+))
+DropdownMenuItem.displayName = DropdownMenuPrimitive.Item.displayName
+
+const DropdownMenuCheckboxItem = React.forwardRef<
+  React.ElementRef<typeof DropdownMenuPrimitive.CheckboxItem>,
+  React.ComponentPropsWithoutRef<typeof DropdownMenuPrimitive.CheckboxItem>
+>(({ className, children, checked, ...props }, ref) => (
+  <DropdownMenuPrimitive.CheckboxItem
+    ref={ref}
+    className={cn(
+      "relative flex cursor-default select-none items-center rounded-sm py-1.5 pl-8 pr-2 text-sm outline-none transition-colors focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50",
+      className
+    )}
+    checked={checked}
+    {...props}
+  >
+    <span className="absolute left-2 flex h-3.5 w-3.5 items-center justify-center">
+      <DropdownMenuPrimitive.ItemIndicator>
+        <Check className="h-4 w-4" />
+      </DropdownMenuPrimitive.ItemIndicator>
+    </span>
+    {children}
+  </DropdownMenuPrimitive.CheckboxItem>
+))
+DropdownMenuCheckboxItem.displayName =
+  DropdownMenuPrimitive.CheckboxItem.displayName
+
+const DropdownMenuRadioItem = React.forwardRef<
+  React.ElementRef<typeof DropdownMenuPrimitive.RadioItem>,
+  React.ComponentPropsWithoutRef<typeof DropdownMenuPrimitive.RadioItem>
+>(({ className, children, ...props }, ref) => (
+  <DropdownMenuPrimitive.RadioItem
+    ref={ref}
+    className={cn(
+      "relative flex cursor-default select-none items-center rounded-sm py-1.5 pl-8 pr-2 text-sm outline-none transition-colors focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50",
+      className
+    )}
+    {...props}
+  >
+    <span className="absolute left-2 flex h-3.5 w-3.5 items-center justify-center">
+      <DropdownMenuPrimitive.ItemIndicator>
+        <Circle className="h-2 w-2 fill-current" />
+      </DropdownMenuPrimitive.ItemIndicator>
+    </span>
+    {children}
+  </DropdownMenuPrimitive.RadioItem>
+))
+DropdownMenuRadioItem.displayName = DropdownMenuPrimitive.RadioItem.displayName
+
+const DropdownMenuLabel = React.forwardRef<
+  React.ElementRef<typeof DropdownMenuPrimitive.Label>,
+  React.ComponentPropsWithoutRef<typeof DropdownMenuPrimitive.Label> & {
+    inset?: boolean
+  }
+>(({ className, inset, ...props }, ref) => (
+  <DropdownMenuPrimitive.Label
+    ref={ref}
+    className={cn(
+      "px-2 py-1.5 text-sm font-semibold",
+      inset && "pl-8",
+      className
+    )}
+    {...props}
+  />
+))
+DropdownMenuLabel.displayName = DropdownMenuPrimitive.Label.displayName
+
+const DropdownMenuSeparator = React.forwardRef<
+  React.ElementRef<typeof DropdownMenuPrimitive.Separator>,
+  React.ComponentPropsWithoutRef<typeof DropdownMenuPrimitive.Separator>
+>(({ className, ...props }, ref) => (
+  <DropdownMenuPrimitive.Separator
+    ref={ref}
+    className={cn("-mx-1 my-1 h-px bg-muted", className)}
+    {...props}
+  />
+))
+DropdownMenuSeparator.displayName = DropdownMenuPrimitive.Separator.displayName
+
+const DropdownMenuShortcut = ({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLSpanElement>) => {
+  return (
+    <span
+      className={cn("ml-auto text-xs tracking-widest opacity-60", className)}
+      {...props}
+    />
+  )
+}
+DropdownMenuShortcut.displayName = "DropdownMenuShortcut"
+
+export {
+  DropdownMenu,
+  DropdownMenuTrigger,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuCheckboxItem,
+  DropdownMenuRadioItem,
+  DropdownMenuLabel,
+  DropdownMenuSeparator,
+  DropdownMenuShortcut,
+  DropdownMenuGroup,
+  DropdownMenuPortal,
+  DropdownMenuSub,
+  DropdownMenuSubContent,
+  DropdownMenuSubTrigger,
+  DropdownMenuRadioGroup,
+}

src/components/user-menu.tsx

@@ -0,0 +1,87 @@
+'use client';
+
+import { useSession, signOut } from 'next-auth/react';
+import Link from 'next/link';
+import { Settings, LogOut } from 'lucide-react';
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuLabel,
+  DropdownMenuSeparator,
+  DropdownMenuTrigger,
+} from '@/components/ui/dropdown-menu';
+
+/**
+ * UserMenu component — avatar button that opens a dropdown with:
+ *  - User name/email display (non-clickable)
+ *  - Settings link → /app/settings
+ *  - Separator
+ *  - Sign Out button
+ *
+ * The avatar shows the first letter of the user's name or email.
+ */
+export function UserMenu() {
+  const { data: session } = useSession();
+
+  const user = session?.user;
+  const displayName = user?.name || user?.email || '';
+  const initial = displayName.charAt(0).toUpperCase() || '?';
+  const label = user?.name || user?.email || 'Account';
+
+  return (
+    <DropdownMenu>
+      <DropdownMenuTrigger asChild>
+        <button
+          className="w-7 h-7 rounded-full bg-primary/80 flex items-center justify-center text-xs font-semibold text-primary-foreground hover:bg-primary transition-colors focus:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+          aria-label="User menu"
+        >
+          {initial}
+        </button>
+      </DropdownMenuTrigger>
+
+      <DropdownMenuContent align="end" className="w-52">
+        {/* User identity — non-clickable */}
+        <DropdownMenuLabel className="font-normal">
+          <div className="flex flex-col gap-0.5">
+            {user?.name && (
+              <span className="text-sm font-medium leading-none truncate">
+                {user.name}
+              </span>
+            )}
+            {user?.email && (
+              <span className="text-xs text-muted-foreground truncate">
+                {user.email}
+              </span>
+            )}
+            {!user?.name && !user?.email && (
+              <span className="text-sm text-muted-foreground">{label}</span>
+            )}
+          </div>
+        </DropdownMenuLabel>
+
+        <DropdownMenuSeparator />
+
+        <DropdownMenuItem asChild>
+          <Link
+            href="/app/settings"
+            className="flex items-center gap-2 cursor-pointer"
+          >
+            <Settings className="w-4 h-4" />
+            Settings
+          </Link>
+        </DropdownMenuItem>
+
+        <DropdownMenuSeparator />
+
+        <DropdownMenuItem
+          className="flex items-center gap-2 text-destructive focus:text-destructive cursor-pointer"
+          onSelect={() => signOut({ callbackUrl: '/login' })}
+        >
+          <LogOut className="w-4 h-4" />
+          Sign Out
+        </DropdownMenuItem>
+      </DropdownMenuContent>
+    </DropdownMenu>
+  );
+}