Implement admin ports and system settings management

- Port CRUD: list, create, update with branding, currency, timezone
- System settings: upsert key-value pairs per port with known settings UI
  (AI feature flags, invoice discount, pipeline weights, berth rules)
- Settings manager with toggle switches, number inputs, and JSON editors
- Replace both stub pages with real implementations

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

src/lib/validators/ports.ts

@@ -0,0 +1,41 @@
+import { z } from 'zod';
+
+export const createPortSchema = z.object({
+  name: z.string().min(1).max(200),
+  slug: z
+    .string()
+    .min(1)
+    .max(100)
+    .regex(/^[a-z0-9-]+$/, 'Slug must be lowercase alphanumeric with hyphens'),
+  logoUrl: z.string().url().optional(),
+  primaryColor: z
+    .string()
+    .regex(/^#[0-9a-fA-F]{6}$/)
+    .optional(),
+  defaultCurrency: z.string().length(3).default('USD'),
+  timezone: z.string().min(1).default('America/Anguilla'),
+});
+
+export type CreatePortInput = z.infer<typeof createPortSchema>;
+
+export const updatePortSchema = z.object({
+  name: z.string().min(1).max(200).optional(),
+  slug: z
+    .string()
+    .min(1)
+    .max(100)
+    .regex(/^[a-z0-9-]+$/, 'Slug must be lowercase alphanumeric with hyphens')
+    .optional(),
+  logoUrl: z.string().url().nullable().optional(),
+  primaryColor: z
+    .string()
+    .regex(/^#[0-9a-fA-F]{6}$/)
+    .nullable()
+    .optional(),
+  defaultCurrency: z.string().length(3).optional(),
+  timezone: z.string().min(1).optional(),
+  isActive: z.boolean().optional(),
+  settings: z.record(z.string(), z.unknown()).optional(),
+});
+
+export type UpdatePortInput = z.infer<typeof updatePortSchema>;

src/lib/validators/settings.ts

@@ -0,0 +1,14 @@
+import { z } from 'zod';
+
+export const upsertSettingSchema = z.object({
+  key: z.string().min(1).max(100),
+  value: z.unknown(),
+});
+
+export type UpsertSettingInput = z.infer<typeof upsertSettingSchema>;
+
+export const deleteSettingSchema = z.object({
+  key: z.string().min(1).max(100),
+});
+
+export type DeleteSettingInput = z.infer<typeof deleteSettingSchema>;