Add Milestones 1 & 2: full-stack POS foundation with admin UI

- Node/Express/TypeScript API under /api/v1 with JWT auth (login, refresh, logout, /me)
- Prisma schema: vendors, users, roles, products, categories, taxes, transactions
- SQLite for local dev; Postgres via docker-compose for production
- Full CRUD routes for vendors, users, categories, taxes, products with Zod validation and RBAC
- Paginated list endpoints scoped per vendor; refresh token rotation
- React/TypeScript admin SPA (Vite): login, protected routing, sidebar layout
- Pages: Dashboard, Catalog (tabbed Products/Categories/Taxes), Users, Vendor Settings
- Shared UI: Table, Modal, FormField, Btn, PageHeader components
- Multi-stage Dockerfile; docker-compose with Postgres healthcheck
- Seed script with demo vendor and owner account
- INSTRUCTIONS.md, ROADMAP.md, .claude/launch.json for dev server config

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

server/node_modules/ecdsa-sig-formatter/package.json

@@ -0,0 +1,46 @@
+{
+  "name": "ecdsa-sig-formatter",
+  "version": "1.0.11",
+  "description": "Translate ECDSA signatures between ASN.1/DER and JOSE-style concatenation",
+  "main": "src/ecdsa-sig-formatter.js",
+  "scripts": {
+    "check-style": "eslint .",
+    "pretest": "npm run check-style",
+    "test": "istanbul cover --root src _mocha -- spec",
+    "report-cov": "cat ./coverage/lcov.info | coveralls"
+  },
+  "typings": "./src/ecdsa-sig-formatter.d.ts",
+  "repository": {
+    "type": "git",
+    "url": "git+ssh://git@github.com/Brightspace/node-ecdsa-sig-formatter.git"
+  },
+  "keywords": [
+    "ecdsa",
+    "der",
+    "asn.1",
+    "jwt",
+    "jwa",
+    "jsonwebtoken",
+    "jose"
+  ],
+  "author": "D2L Corporation",
+  "license": "Apache-2.0",
+  "bugs": {
+    "url": "https://github.com/Brightspace/node-ecdsa-sig-formatter/issues"
+  },
+  "homepage": "https://github.com/Brightspace/node-ecdsa-sig-formatter#readme",
+  "dependencies": {
+    "safe-buffer": "^5.0.1"
+  },
+  "devDependencies": {
+    "bench": "^0.3.6",
+    "chai": "^3.5.0",
+    "coveralls": "^2.11.9",
+    "eslint": "^2.12.0",
+    "eslint-config-brightspace": "^0.2.1",
+    "istanbul": "^0.4.3",
+    "jwk-to-pem": "^1.2.5",
+    "mocha": "^2.5.3",
+    "native-crypto": "^1.7.0"
+  }
+}