Add user settings, audit log, berth CRUD, and missing endpoints

- PATCH /api/v1/me: self-service profile update (name, phone, timezone)
- User settings page with profile editor + notification preferences
- Audit log API with filtering (entity, action, user, date range)
- Audit log page with search, entity type, and action filters
- Berth create/delete: POST /api/v1/berths + DELETE /api/v1/berths/[id]
- Client duplicates endpoint: GET /api/v1/clients/duplicates?name=
- Replace settings and audit stub pages with real implementations

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/lib/services/audit.service.ts

@@ -0,0 +1,57 @@
+import { and, eq, desc, sql, gte, lte } from 'drizzle-orm';
+
+import { db } from '@/lib/db';
+import { auditLogs } from '@/lib/db/schema';
+
+interface AuditListQuery {
+  page: number;
+  limit: number;
+  entityType?: string;
+  action?: string;
+  userId?: string;
+  entityId?: string;
+  dateFrom?: string;
+  dateTo?: string;
+  search?: string;
+}
+
+export async function listAuditLogs(portId: string, query: AuditListQuery) {
+  const conditions = [eq(auditLogs.portId, portId)];
+
+  if (query.entityType) conditions.push(eq(auditLogs.entityType, query.entityType));
+  if (query.action) conditions.push(eq(auditLogs.action, query.action));
+  if (query.userId) conditions.push(eq(auditLogs.userId, query.userId));
+  if (query.entityId) conditions.push(eq(auditLogs.entityId, query.entityId));
+  if (query.dateFrom) conditions.push(gte(auditLogs.createdAt, new Date(query.dateFrom)));
+  if (query.dateTo) conditions.push(lte(auditLogs.createdAt, new Date(query.dateTo)));
+  if (query.search) {
+    conditions.push(
+      sql`(${auditLogs.entityType} ILIKE ${'%' + query.search + '%'} OR ${auditLogs.action} ILIKE ${'%' + query.search + '%'})`,
+    );
+  }
+
+  const offset = (query.page - 1) * query.limit;
+
+  const [data, countResult] = await Promise.all([
+    db
+      .select()
+      .from(auditLogs)
+      .where(and(...conditions))
+      .orderBy(desc(auditLogs.createdAt))
+      .limit(query.limit)
+      .offset(offset),
+    db
+      .select({ count: sql<number>`count(*)` })
+      .from(auditLogs)
+      .where(and(...conditions)),
+  ]);
+
+  return {
+    data,
+    pagination: {
+      page: query.page,
+      limit: query.limit,
+      total: Number(countResult[0]?.count ?? 0),
+    },
+  };
+}