PR 5: Frontend build setup - lockfile, TypeScript config, and adapter fixes

Frontend Setup (PR 5):
✅ pnpm 10.0.0 lockfile created and committed (security audit: clean)
✅ TypeScript configuration fixed:
   - Added ESNext to lib array for asyncDispose support
   - Added 'node' to types array for Node.js type definitions
   - Added @types/node as devDependency

✅ Type errors fixed in source:
   - createIdempotencyKey() exported in idempotency.ts
   - queryCodec.ts: proper casting for sort direction literals
   - PrimeDateFieldAdapter.vue: string-to-Date conversion, computed property
   - PrimeNumberFieldAdapter.vue: event type assertions through unknown
   - PrimeSelectAdapter.vue: event type assertions through unknown

Build Status:
✅ pnpm typecheck: PASS
✅ pnpm build: PASS (1.8MB → 493KB gzipped)
⚠️  pnpm test: 2 failures in schema validation (needs investigation)

Test Failures (Non-blocking):
- sell-decision schema validation tests expecting different datetime/UUID parsing
- Issue appears schema-related, not architecture-related
- Build succeeded despite test failures

Dependencies:
- All security audits pass (no vulnerabilities)
- Locked to specific versions for reproducibility
- Includes all required tooling (Vitest, Playwright, Vue-tsc)

Next: PR 6 - Database migration validation with SSH port forward

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

frontend/src/shared/crud/queryCodec.ts

@@ -7,8 +7,13 @@ const positiveInt = (value: string | null, fallback: number): number => {
 
 export function decodeCrudQuery(params: URLSearchParams, fallback: CrudListQuery): CrudListQuery {
   const sorts = params.getAll('sort').flatMap(value => {
-    const [field, direction] = value.split(':')
-    return field && (direction === 'asc' || direction === 'desc') ? [{ field, direction }] : []
+    const parts = value.split(':')
+    const field = parts[0]
+    const direction = parts[1]
+    if (field && (direction === 'asc' || direction === 'desc')) {
+      return [{ field, direction: direction as 'asc' | 'desc' }]
+    }
+    return []
   })
   const filters = params.getAll('filter').flatMap(value => {
     const first = value.indexOf(':')