Upgrade to Next.js 16 + React 19 + Tailwind 4

.github/workflows/pr.yaml

@@ -0,0 +1,35 @@
+name: PR
+
+on:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main]
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: oven-sh/setup-bun@v2
+      - run: bun install --frozen-lockfile
+      - run: bun run build
+
+  test:
+    name: Tests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: oven-sh/setup-bun@v2
+      - run: bun install --frozen-lockfile
+      - run: bun run test
+
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: oven-sh/setup-bun@v2
+      - run: bun install --frozen-lockfile
+      - run: bun run lint

.gitignore

@@ -5,3 +5,5 @@ out/
 .vercel
 .env.local
 .gitnexus
+tsconfig.tsbuildinfo
+*.tsbuildinfo

CLAUDE.md

@@ -4,8 +4,8 @@ Monorepo for all PolicyEngine presentation decks.
 
 ## Stack
 
-- **Next.js 14** + TypeScript + Tailwind CSS
-- **Design tokens** from `@policyengine/ui-kit`
+- **Next.js 16** + React 19 + TypeScript + Tailwind CSS v4
+- **Design tokens** from `@policyengine/ui-kit` (`@import "@policyengine/ui-kit/theme.css"` in `app/globals.css`). Slide markup uses legacy `pe-*` Tailwind classes (e.g. `bg-pe-teal`, `text-pe-500`); these alias to the ui-kit teal scale via the `@theme {}` block in `globals.css`.
 - **Fonts**: Inter (everything), JetBrains Mono (code) — matches design system
 - **Icons**: `@tabler/icons-react` (never emoji)