feat: office address, multi-template SMS manager, hardcoded defaults with auto-seed

- Add streetAddress/city/state/zipCode fields to OfficeContact (schema + storage + UI)
- Support {officeAddress} variable in batch reminder SMS
- Replace single SMS template field with full CRUD template list (add/rename/edit/delete)
- Store SMS template list under _sms_template_list; first template synced to batch reminder
- Hardcode all AI chat template defaults into codebase (reminder SMS, greetings, fallback)
- Add seed-templates.ts that auto-seeds default templates for all users on server boot
- Update README: note that templates are auto-configured on first boot

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

apps/Backend/src/storage/twilio-storage.ts

@@ -87,6 +87,30 @@ export const twilioStorage = {
     });
   },
 
+  async getSmsTemplateList(userId: number): Promise<{ id: string; name: string; body: string }[]> {
+    const settings = await db.twilioSettings.findUnique({ where: { userId } });
+    const all = (settings?.templates as Record<string, string>) || {};
+    const raw = all["_sms_template_list"];
+    if (!raw) return [];
+    try { return JSON.parse(raw); } catch { return []; }
+  },
+
+  async saveSmsTemplateList(userId: number, templates: { id: string; name: string; body: string }[]) {
+    const settings = await db.twilioSettings.findUnique({ where: { userId } });
+    const existing = (settings?.templates as Record<string, string>) || {};
+    const updated: Record<string, string> = {
+      ...existing,
+      "_sms_template_list": JSON.stringify(templates),
+    };
+    // Keep _ai_chat_reminder_sms in sync with the first template for batch sends
+    if (templates.length > 0) updated["_ai_chat_reminder_sms"] = templates[0]!.body;
+    return db.twilioSettings.upsert({
+      where:  { userId },
+      update: { templates: updated },
+      create: { userId, accountSid: "", authToken: "", phoneNumber: "", templates: updated },
+    });
+  },
+
   async getRecentCommunicationsByUser(userId: number, limit = 20) {
     return db.communication.findMany({
       where: { patient: { userId } },