feat: add schedule column labels, office hours enforcement, and appointment move fix

- Schedule columns default to labels A–F (localStorage, per-browser, click to rename)
- Settings → Advanced → Office Hours: configure Doctors (A-C) and Hygienists (D-F) AM/PM hours per weekday
- Gray out schedule slots outside office hours; override dialog for manual exceptions
- Override Office Hours toggle: select specific dates where all slots are open
- Fix appointment move: send only real DB fields to avoid Zod strict-mode rejection of computed fields (hasProcedures, hasClaimWithNumber)
- Fix backend PUT /appointments: safe error logging to prevent Prisma error crashing Node inspect
- Add OfficeHours Prisma model and GET/PUT /api/office-hours route

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

apps/Frontend/src/components/layout/sidebar.tsx

@@ -26,6 +26,7 @@ import {
   Stethoscope,
   Workflow,
   Bot,
+  Clock,
 } from "lucide-react";
 import { cn } from "@/lib/utils";
 import { useMemo, useState, useEffect } from "react";
@@ -221,6 +222,11 @@ export function Sidebar() {
             path: "/settings/ai",
             icon: <Bot className="h-4 w-4 text-gray-400" />,
           },
+          {
+            name: "Office Hours",
+            path: "/settings/officehours",
+            icon: <Clock className="h-4 w-4 text-gray-400" />,
+          },
         ],
       },
     ],