Phase 1a: shared schemas, service layer, server tooling

- shared/schemas/: move Zod schemas out of routes so client + server share them
- shared/types.ts: inferred types and enums for cross-package use
- server tsconfig rootDir raised to ".." so shared/ compiles in-tree
- server/src/services/: ticket, comment, cti, user, auth, notification (stub), search (stub)
- Routes thinned to validate-delegate-return; business logic now testable in isolation
- server/src/lib/httpError.ts: typed HttpError replaces ad-hoc throw shapes
- server/src/lib/logger.ts: pino structured logging replaces console.log
- autoClose job delegates to ticketService.closeStale()
- express-rate-limit on /api/auth/login (10 / 15min / IP)
- vitest + vitest-mock-extended; 20 service-level tests cover auth, ticket, comment, user flows
- CI: lint + test jobs before docker builds

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

shared/schemas/user.ts

@@ -0,0 +1,21 @@
+import { z } from 'zod';
+import { roleSchema } from './enums';
+
+export const createUserSchema = z.object({
+  username: z.string().min(1).max(50),
+  email: z.string().email(),
+  displayName: z.string().min(1).max(100),
+  password: z.string().min(8).optional(),
+  role: roleSchema.default('AGENT'),
+});
+
+export const updateUserSchema = z.object({
+  displayName: z.string().min(1).max(100).optional(),
+  email: z.string().email().optional(),
+  password: z.string().min(8).optional(),
+  role: roleSchema.optional(),
+  regenerateApiKey: z.boolean().optional(),
+});
+
+export type CreateUserInput = z.infer<typeof createUserSchema>;
+export type UpdateUserInput = z.infer<typeof updateUserSchema>;