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/zod/v4/classic/errors.js

@@ -0,0 +1,41 @@
+import * as core from "../core/index.js";
+import { $ZodError } from "../core/index.js";
+const initializer = (inst, issues) => {
+    $ZodError.init(inst, issues);
+    inst.name = "ZodError";
+    Object.defineProperties(inst, {
+        format: {
+            value: (mapper) => core.formatError(inst, mapper),
+            // enumerable: false,
+        },
+        flatten: {
+            value: (mapper) => core.flattenError(inst, mapper),
+            // enumerable: false,
+        },
+        addIssue: {
+            value: (issue) => inst.issues.push(issue),
+            // enumerable: false,
+        },
+        addIssues: {
+            value: (issues) => inst.issues.push(...issues),
+            // enumerable: false,
+        },
+        isEmpty: {
+            get() {
+                return inst.issues.length === 0;
+            },
+            // enumerable: false,
+        },
+    });
+    // Object.defineProperty(inst, "isEmpty", {
+    //   get() {
+    //     return inst.issues.length === 0;
+    //   },
+    // });
+};
+export const ZodError = core.$constructor("ZodError", initializer);
+export const ZodRealError = core.$constructor("ZodError", initializer, {
+    Parent: Error,
+});
+// /** @deprecated Use `z.core.$ZodErrorMapCtx` instead. */
+// export type ErrorMapCtx = core.$ZodErrorMapCtx;