Move app shell from RestaurantReviews/ to project root

The dashboard (Express server, React client, Vite build, all config)
now lives at the repository root where it belongs. RestaurantReviews/
retains a README with the exercise API spec, pointing to the root for
source and tests.

What moved:
- src/, package.json, tsconfig, vite/vitest config, eslint, prettier
- Makefile targets merged into root Makefile
- CI workflow updated (no more working-directory override)

Critical path fix: exercises/config.ts ROOT resolves 3 levels up
instead of 4, matching the new depth from project root.

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

Author: georgeglarson

.gitattributes

@@ -1,2 +1,2 @@
 # Mark generated files so GitHub's language stats reflect actual code
-RestaurantReviews/package-lock.json linguist-generated=true
+package-lock.json linguist-generated=true

.github/workflows/ci.yml

@@ -74,18 +74,15 @@ jobs:
       - run: make test
 
   restaurant-reviews:
-    name: RestaurantReviews (TypeScript/React)
+    name: Dashboard + RestaurantReviews (TypeScript/React)
     runs-on: ubuntu-latest
-    defaults:
-      run:
-        working-directory: RestaurantReviews
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
           node-version: "22"
           cache: npm
-          cache-dependency-path: RestaurantReviews/package-lock.json
+          cache-dependency-path: package-lock.json
       - run: npm ci
       - run: make typecheck
       - run: make test

RestaurantReviews/.prettierrc .prettierrcRestaurantReviews/.prettierrc renamed to .prettierrc

@@ -1,4 +1,32 @@
-.PHONY: check-deps test-all
+.PHONY: check-deps test-all deps typecheck test run dev build clean
+
+# ── Dashboard (TypeScript/React) ─────────────────────────────────────
+
+deps:
+	@command -v node >/dev/null 2>&1 || { echo "Node.js not found — install from https://nodejs.org/"; exit 1; }
+	@[ -d node_modules ] || npm install
+
+typecheck: deps
+	npx tsc --noEmit
+
+test: deps
+	npx vitest run --reporter=verbose
+
+# Production: build server + client, then serve from Express
+run: deps build
+	node dist/server/index.js
+
+# Development: Express API + Vite dev server (HMR on :5173, API proxy to :3000)
+dev: deps
+	npx tsx src/server/index.ts & VITE_PID=$$!; npx vite --config vite.config.ts; kill $$VITE_PID 2>/dev/null || true
+
+build: deps
+	npm run build
+
+clean:
+	rm -rf dist
+
+# ── Cross-project ────────────────────────────────────────────────────
 
 check-deps:
 	@echo "Checking dependencies..."
@@ -18,4 +46,4 @@ test-all:
 	@echo "=== MorseCode (Perl) ===" && $(MAKE) -C MorseCode test && echo ""
 	@echo "=== OnScreenKeyboard (Python) ===" && $(MAKE) -C OnScreenKeyboard test && echo ""
 	@echo "=== GildedRose (Go) ===" && $(MAKE) -C GildedRose test && echo ""
-	@echo "=== RestaurantReviews (TypeScript/React) ===" && $(MAKE) -C RestaurantReviews test && echo ""
+	@echo "=== Dashboard (TypeScript/React) ===" && $(MAKE) test && echo ""