Complete monorepo toolchain setup (tasks 1.1-1.7)

- Turborepo + pnpm workspaces with catalog for shared dependency versions
- TypeScript strict config (base + per-package extends)
- Tailwind CSS v4 via @tailwindcss/vite plugin
- ESLint + Prettier shared config
- Planner app scaffolded with React Router 7 (port 3001)
- Journal app scaffolded with React Router 7 (port 3000)
- Both apps build and start successfully via turbo

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/ui/package.json

@@ -2,6 +2,10 @@
   "name": "@trails-cool/ui",
   "version": "0.0.1",
   "type": "module",
+  "exports": {
+    ".": "./src/index.ts",
+    "./styles.css": "./src/styles.css"
+  },
   "main": "./src/index.ts",
   "types": "./src/index.ts"
 }

packages/ui/src/styles.css

@@ -0,0 +1 @@
+@import "tailwindcss";

packages/ui/tsconfig.json

@@ -0,0 +1,8 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "outDir": "dist",
+    "rootDir": "src"
+  },
+  "include": ["src"]
+}