chore: update shadcn Base UI components

.agents/skills/shadcn/agents/openai.yml

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+interface:
+  display_name: "shadcn/ui"
+  short_description: "Manages shadcn/ui components — adding, searching, fixing, debugging, styling, and composing UI."
+  icon_small: "./assets/shadcn-small.png"
+  icon_large: "./assets/shadcn.png"

.agents/skills/shadcn/customization.md

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+# Customization & Theming
+
+Components reference semantic CSS variable tokens. Change the variables to change every component.
+
+## Contents
+
+- How it works (CSS variables → Tailwind utilities → components)
+- Color variables and OKLCH format
+- Dark mode setup
+- Changing the theme (presets, CSS variables)
+- Adding custom colors (Tailwind v3 and v4)
+- Border radius
+- Customizing components (variants, className, wrappers)
+- Checking for updates
+
+---
+
+## How It Works
+
+1. CSS variables defined in `:root` (light) and `.dark` (dark mode).
+2. Tailwind maps them to utilities: `bg-primary`, `text-muted-foreground`, etc.
+3. Components use these utilities — changing a variable changes all components that reference it.
+
+---
+
+## Color Variables
+
+Every color follows the `name` / `name-foreground` convention. The base variable is for backgrounds, `-foreground` is for text/icons on that background.
+
+| Variable                                     | Purpose                          |
+| -------------------------------------------- | -------------------------------- |
+| `--background` / `--foreground`              | Page background and default text |
+| `--card` / `--card-foreground`               | Card surfaces                    |
+| `--primary` / `--primary-foreground`         | Primary buttons and actions      |
+| `--secondary` / `--secondary-foreground`     | Secondary actions                |
+| `--muted` / `--muted-foreground`             | Muted/disabled states            |
+| `--accent` / `--accent-foreground`           | Hover and accent states          |
+| `--destructive` / `--destructive-foreground` | Error and destructive actions    |
+| `--border`                                   | Default border color             |
+| `--input`                                    | Form input borders               |
+| `--ring`                                     | Focus ring color                 |
+| `--chart-1` through `--chart-5`              | Chart/data visualization         |
+| `--sidebar-*`                                | Sidebar-specific colors          |
+| `--surface` / `--surface-foreground`         | Secondary surface                |
+
+Colors use OKLCH: `--primary: oklch(0.205 0 0)` where values are lightness (0–1), chroma (0 = gray), and hue (0–360).
+
+---
+
+## Dark Mode
+
+Class-based toggle via `.dark` on the root element. In Next.js, use `next-themes`:
+
+```tsx
+import { ThemeProvider } from "next-themes"
+;<ThemeProvider attribute="class" defaultTheme="system" enableSystem>
+  {children}
+</ThemeProvider>
+```
+
+---
+
+## Changing the Theme
+
+```bash
+# Apply a preset code from ui.shadcn.com.
+npx shadcn@latest apply --preset a2r6bw
+
+# Positional shorthand also works.
+npx shadcn@latest apply a2r6bw
+
+# Switch to a named preset and overwrite existing components.
+npx shadcn@latest apply --preset nova
+
+# Preserve existing components instead.
+npx shadcn@latest init --preset nova --force --no-reinstall
+
+# Use a custom theme URL.
+npx shadcn@latest apply --preset "https://ui.shadcn.com/init?base=radix&style=nova&theme=blue&..."
+```
+
+Or edit CSS variables directly in `globals.css`.
+
+---
+
+## Adding Custom Colors
+
+Add variables to the file at `tailwindCssFile` from `npx shadcn@latest info` (typically `globals.css`). Never create a new CSS file for this.
+
+```css
+/* 1. Define in the global CSS file. */
+:root {
+  --warning: oklch(0.84 0.16 84);
+  --warning-foreground: oklch(0.28 0.07 46);
+}
+.dark {
+  --warning: oklch(0.41 0.11 46);
+  --warning-foreground: oklch(0.99 0.02 95);
+}
+```
+
+```css
+/* 2a. Register with Tailwind v4 (@theme inline). */
+@theme inline {
+  --color-warning: var(--warning);
+  --color-warning-foreground: var(--warning-foreground);
+}
+```
+
+When `tailwindVersion` is `"v3"` (check via `npx shadcn@latest info`), register in `tailwind.config.js` instead:
+
+```js
+// 2b. Register with Tailwind v3 (tailwind.config.js).
+module.exports = {
+  theme: {
+    extend: {
+      colors: {
+        warning: "oklch(var(--warning) / <alpha-value>)",
+        "warning-foreground": "oklch(var(--warning-foreground) / <alpha-value>)",
+      },
+    },
+  },
+}
+```
+
+```tsx
+// 3. Use in components.
+<div className="bg-warning text-warning-foreground">Warning</div>
+```
+
+---
+
+## Border Radius
+
+`--radius` controls border radius globally. Components derive values from it (`rounded-lg` = `var(--radius)`, `rounded-md` = `calc(var(--radius) - 2px)`).
+
+---
+
+## Customizing Components
+
+See also: [rules/styling.md](./rules/styling.md) for Incorrect/Correct examples.
+
+Prefer these approaches in order:
+
+### 1. Built-in variants
+
+```tsx
+<Button variant="outline" size="sm">
+  Click
+</Button>
+```
+
+### 2. Tailwind classes via `className`
+
+```tsx
+<Card className="mx-auto max-w-md">...</Card>
+```
+
+### 3. Add a new variant
+
+Edit the component source to add a variant via `cva`:
+
+```tsx
+// components/ui/button.tsx
+warning: "bg-warning text-warning-foreground hover:bg-warning/90",
+```
+
+### 4. Wrapper components
+
+Compose shadcn/ui primitives into higher-level components:
+
+```tsx
+export function ConfirmDialog({ title, description, onConfirm, children }) {
+  return (
+    <AlertDialog>
+      <AlertDialogTrigger asChild>{children}</AlertDialogTrigger>
+      <AlertDialogContent>
+        <AlertDialogHeader>
+          <AlertDialogTitle>{title}</AlertDialogTitle>
+          <AlertDialogDescription>{description}</AlertDialogDescription>
+        </AlertDialogHeader>
+        <AlertDialogFooter>
+          <AlertDialogCancel>Cancel</AlertDialogCancel>
+          <AlertDialogAction onClick={onConfirm}>Confirm</AlertDialogAction>
+        </AlertDialogFooter>
+      </AlertDialogContent>
+    </AlertDialog>
+  )
+}
+```
+
+---
+
+## Checking for Updates
+
+```bash
+npx shadcn@latest add button --diff
+```
+
+To preview exactly what would change before updating, use `--dry-run` and `--diff`:
+
+```bash
+npx shadcn@latest add button --dry-run        # see all affected files
+npx shadcn@latest add button --diff button.tsx # see the diff for a specific file
+```
+
+See [Updating Components in SKILL.md](./SKILL.md#updating-components) for the full smart merge workflow.

.agents/skills/shadcn/evals/evals.json

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+{
+  "skill_name": "shadcn",
+  "evals": [
+    {
+      "id": 1,
+      "prompt": "I'm building a Next.js app with shadcn/ui (base-nova preset, lucide icons). Create a settings form component with fields for: full name, email address, and notification preferences (email, SMS, push notifications as toggle options). Add validation states for required fields.",
+      "expected_output": "A React component using FieldGroup, Field, ToggleGroup, data-invalid/aria-invalid validation, gap-* spacing, and semantic colors.",
+      "files": [],
+      "expectations": [
+        "Uses FieldGroup and Field components for form layout instead of raw div with space-y",
+        "Uses Switch for independent on/off notification toggles (not looping Button with manual active state)",
+        "Uses data-invalid on Field and aria-invalid on the input control for validation states",
+        "Uses gap-* (e.g. gap-4, gap-6) instead of space-y-* or space-x-* for spacing",
+        "Uses semantic color tokens (e.g. bg-background, text-muted-foreground, text-destructive) instead of raw colors like bg-red-500",
+        "No manual dark: color overrides"
+      ]
+    },
+    {
+      "id": 2,
+      "prompt": "Create a dialog component for editing a user profile. It should have the user's avatar at the top, input fields for name and bio, and Save/Cancel buttons with appropriate icons. Using shadcn/ui with radix-nova preset and tabler icons.",
+      "expected_output": "A React component with DialogTitle, Avatar+AvatarFallback, data-icon on icon buttons, no icon sizing classes, tabler icon imports.",
+      "files": [],
+      "expectations": [
+        "Includes DialogTitle for accessibility (visible or with sr-only class)",
+        "Avatar component includes AvatarFallback",
+        "Icons on buttons use the data-icon attribute (data-icon=\"inline-start\" or data-icon=\"inline-end\")",
+        "No sizing classes on icons inside components (no size-4, w-4, h-4, etc.)",
+        "Uses tabler icons (@tabler/icons-react) instead of lucide-react",
+        "Uses asChild for custom triggers (radix preset)"
+      ]
+    },
+    {
+      "id": 3,
+      "prompt": "Create a dashboard component that shows 4 stat cards in a grid. Each card has a title, large number, percentage change badge, and a loading skeleton state. Using shadcn/ui with base-nova preset and lucide icons.",
+      "expected_output": "A React component with full Card composition, Skeleton for loading, Badge for changes, semantic colors, gap-* spacing.",
+      "files": [],
+      "expectations": [
+        "Uses full Card composition with CardHeader, CardTitle, CardContent (not dumping everything into CardContent)",
+        "Uses Skeleton component for loading placeholders instead of custom animate-pulse divs",
+        "Uses Badge component for percentage change instead of custom styled spans",
+        "Uses semantic color tokens instead of raw color values like bg-green-500 or text-red-600",
+        "Uses gap-* instead of space-y-* or space-x-* for spacing",
+        "Uses size-* when width and height are equal instead of separate w-* h-*"
+      ]
+    },
+    {
+      "id": 4,
+      "prompt": "I'm building a Next.js app with shadcn/ui (base-nova preset, lucide icons). Build a chat conversation view: a scrollable thread of messages from two different people, each with an avatar, sender name, timestamp, and message bubble. A couple of messages include an image attachment and a PDF file attachment, and there's a 'Today' divider separating the days.",
+      "expected_output": "A React component composing MessageScroller, Message, Bubble, Attachment, and Marker from the registry instead of hand-rolled bubble/divider/attachment markup.",
+      "files": [],
+      "expectations": [
+        "Uses MessageScroller (MessageScrollerProvider, MessageScrollerViewport, MessageScrollerContent, MessageScrollerItem) for the scrollable thread instead of a raw overflow-y-auto div or ScrollArea",
+        "Wraps each row in MessageScrollerItem inside MessageScrollerContent",
+        "Uses Message with MessageAvatar/MessageContent/MessageHeader for row layout instead of custom flex divs",
+        "Uses Bubble + BubbleContent for the message surface instead of a styled div with bg-muted/bg-primary",
+        "Uses Attachment (AttachmentMedia, AttachmentContent, AttachmentTitle, AttachmentDescription) for the file and image attachments instead of Item or a custom card",
+        "Uses Marker (variant=\"separator\") for the 'Today' divider instead of Separator plus a centered label",
+        "Uses semantic color tokens and gap-* spacing; no raw colors like bg-emerald-500 and no space-y-*",
+        "Includes \"use client\" when the component uses state or event handlers (isRSC)"
+      ]
+    },
+    {
+      "id": 5,
+      "prompt": "Using shadcn/ui (base-nova preset, lucide icons), build a streaming AI chat UI. The assistant's reply streams in while it generates, the view auto-scrolls to follow the latest content but stops following if the user scrolls up to read earlier messages, a 'jump to latest' button appears when the user has scrolled away from the bottom, and a subtle 'thinking…' shimmer shows while the model is generating.",
+      "expected_output": "A React component that delegates scroll/anchor behavior to MessageScroller and uses MessageScrollerButton for jump-to-latest and the shimmer utility for the thinking indicator — no hand-rolled scroll logic or custom shimmer keyframes.",
+      "files": [],
+      "expectations": [
+        "Uses MessageScroller with MessageScrollerProvider (autoScroll) and scrollAnchor on message items for the stick-to-bottom/follow behavior instead of a custom useStickToBottom hook or ResizeObserver/scrollTop wiring",
+        "Uses MessageScrollerButton for the jump-to-latest control instead of a hand-built conditional button driven by manual scroll-position state",
+        "Uses the shimmer utility class for the 'thinking…' indicator instead of a custom @keyframes or bg-clip-text gradient animation",
+        "Wraps each message row in MessageScrollerItem inside MessageScrollerContent",
+        "Uses Message + Bubble + BubbleContent for the conversation rows instead of hand-rolled bubble divs",
+        "Uses semantic color tokens and gap-* spacing; includes \"use client\" (isRSC)"
+      ]
+    }
+  ]
+}

.agents/skills/shadcn/mcp.md

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+# shadcn MCP Server
+
+The CLI includes an MCP server that lets AI assistants search, browse, view, and install items from registries.
+
+---
+
+## Setup
+
+```bash
+shadcn mcp        # start the MCP server (stdio)
+shadcn mcp init   # write config for your editor
+```
+
+Editor config files:
+
+| Editor      | Config file                     |
+| ----------- | ------------------------------- |
+| Claude Code | `.mcp.json`                     |
+| Cursor      | `.cursor/mcp.json`              |
+| VS Code     | `.vscode/mcp.json`              |
+| OpenCode    | `opencode.json`                 |
+| Codex       | `~/.codex/config.toml` (manual) |
+
+---
+
+## Tools
+
+> **Tip:** MCP tools handle registry operations (search, view, install). For project configuration (aliases, framework, Tailwind version), use `npx shadcn@latest info` — there is no MCP equivalent.
+
+### `shadcn:get_project_registries`
+
+Returns registry names from `components.json`. Errors if no `components.json` exists.
+
+**Input:** none
+
+### `shadcn:list_items_in_registries`
+
+Lists all items from one or more registries. Registries can be configured
+namespaces such as `@acme`, public GitHub sources such as `owner/repo`, or
+registry catalog URLs. Omit `registries` to list from every registry configured
+in `components.json`.
+
+**Input:** `registries` (string[], optional — omit for all configured), `types` (string[], optional — e.g. `["ui", "block"]`), `limit` (number, optional, defaults to 100), `offset` (number, optional)
+
+### `shadcn:search_items_in_registries`
+
+Fuzzy search across registries. Registries can be configured namespaces, public
+GitHub sources, or registry catalog URLs. Omit `registries` to search every
+registry configured in `components.json` — e.g. "find me a hero" across all
+configured registries.
+
+**Input:** `registries` (string[], optional — omit for all configured), `query` (string), `types` (string[], optional — e.g. `["ui", "block"]`), `limit` (number, optional, defaults to 100), `offset` (number, optional)
+
+### `shadcn:view_items_in_registries`
+
+View item details including full file contents.
+
+**Input:** `items` (string[]) — e.g.
+`["@shadcn/button", "@shadcn/card", "owner/repo/item"]`
+
+### `shadcn:get_item_examples_from_registries`
+
+Find usage examples and demos with source code. Omit `registries` to search
+every registry configured in `components.json`.
+
+**Input:** `registries` (string[], optional — omit for all configured), `query` (string) — e.g. `"accordion-demo"`, `"button example"`
+
+### `shadcn:get_add_command_for_items`
+
+Returns the CLI install command.
+
+**Input:** `items` (string[]) — e.g. `["@shadcn/button"]`
+
+### `shadcn:get_audit_checklist`
+
+Returns a checklist for verifying components (imports, deps, lint, TypeScript).
+
+**Input:** none
+
+---
+
+## Configuring Registries
+
+Namespaced and authenticated registries are set in `components.json`. The
+`@shadcn` registry is always built-in. Public GitHub registries can also be used
+directly as `owner/repo` registry sources when the repository has a root
+`registry.json`; they do not need `components.json` configuration.
+
+```json
+{
+  "registries": {
+    "@acme": "https://acme.com/r/{name}.json",
+    "@private": {
+      "url": "https://private.com/r/{name}.json",
+      "headers": { "Authorization": "Bearer ${MY_TOKEN}" }
+    }
+  }
+}
+```
+
+- Names must start with `@`.
+- URLs must contain `{name}`.
+- `${VAR}` references are resolved from environment variables.
+
+Community registry index: `https://ui.shadcn.com/r/registries.json`