feat: admin panel with SQLite, auth, and calendar-style schedule editor

Complete admin panel for content management:
- SQLite database with better-sqlite3, seed script from content.ts
- Simple password auth with HMAC-signed cookies (Edge + Node compatible)
- 9 section editors: meta, hero, about, team, classes, schedule, pricing, FAQ, contact
- Team CRUD with image upload and drag reorder
- Schedule editor with Google Calendar-style visual timeline (colored blocks, overlap detection, click-to-add)
- All public components refactored to accept data props from DB (with fallback to static content)
- Middleware protecting /admin/* and /api/admin/* routes

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

src/components/sections/Contact.tsx

@@ -1,12 +1,15 @@
 import { MapPin, Phone, Clock, Instagram } from "lucide-react";
-import { siteContent } from "@/data/content";
 import { BRAND } from "@/lib/constants";
 import { SectionHeading } from "@/components/ui/SectionHeading";
 import { Reveal } from "@/components/ui/Reveal";
 import { IconBadge } from "@/components/ui/IconBadge";
+import type { ContactInfo } from "@/types/content";
 
-export function Contact() {
-  const { contact } = siteContent;
+interface ContactProps {
+  data: ContactInfo;
+}
+
+export function Contact({ data: contact }: ContactProps) {
 
   return (
     <section id="contact" className="relative section-padding bg-neutral-50 dark:bg-[#050505]">