feat: add Selenium Settings page to configure paymentGroupId per office

Adds a new Settings → Advanced → Selenium Settings page where the office
name (paymentGroupId) used in United/DentalHub portal dropdowns can be
configured without touching code. Previously hardcoded as "Summit Dental
Care"; now injected from DB into the three United workers at job dispatch.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/db/shared/schemas/variants/input/AiSettings.input.ts

@@ -0,0 +1,22 @@
+import * as z from 'zod';
+// prettier-ignore
+export const AiSettingsInputSchema = z.object({
+    id: z.number().int(),
+    userId: z.number().int(),
+    apiKey: z.string(),
+    aiEnabled: z.boolean(),
+    openAiKey: z.string(),
+    openAiEnabled: z.boolean(),
+    claudeAiKey: z.string(),
+    claudeAiEnabled: z.boolean(),
+    claudeAiModel: z.string(),
+    openAiModel: z.string(),
+    googleAiModel: z.string(),
+    dentalMgmtKey: z.string(),
+    dentalMgmtEnabled: z.boolean(),
+    afterHoursEnabled: z.boolean(),
+    openPhoneReply: z.boolean(),
+    user: z.unknown()
+}).strict();
+
+export type AiSettingsInputType = z.infer<typeof AiSettingsInputSchema>;