refactor(validations): split lib/validations.ts into a barrel'd folder (slice 1)

1141-line lib/validations.ts → lib/validations/<feature>.ts + primitives.ts +
an index.ts barrel. '@/lib/validations' now resolves to the barrel, so all 40
importers are untouched. Every one of the 143 exports is preserved verbatim
(verified by symbol-diff); schemas moved unchanged. tsc 0, 635 tests green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

lib/validations/dues.ts

@@ -0,0 +1,18 @@
+import { z } from 'zod'
+import { DUES_LINK_PLATFORMS, isSafeDuesUrl } from '../dues-payments-logic'
+
+// One external pay-here URL per platform. url must be absolute https (no
+// http downgrade, no javascript:/data: scheme) since it is rendered as a
+// member-clickable anchor. instructions is an optional memo hint (e.g. "put
+// your member name in the note") to help the treasurer reconcile later.
+export const duesPaymentMethodSchema = z.object({
+  platform: z.enum(DUES_LINK_PLATFORMS as unknown as [string, ...string[]]),
+  url: z
+    .string()
+    .trim()
+    .max(500)
+    .refine(isSafeDuesUrl, 'Enter an absolute https:// URL'),
+  instructions: z.string().trim().max(300).optional().nullable(),
+  is_active: z.boolean().optional().default(true),
+  sort_order: z.number().int().min(0).max(999).optional().default(0),
+})