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/Pricing.tsx

@@ -2,15 +2,18 @@
 
 import { useState } from "react";
 import { CreditCard, Building2, ScrollText, Crown, Sparkles } from "lucide-react";
-import { siteContent } from "@/data/content";
 import { SectionHeading } from "@/components/ui/SectionHeading";
 import { Reveal } from "@/components/ui/Reveal";
 import { BookingModal } from "@/components/ui/BookingModal";
+import type { SiteContent } from "@/types/content";
 
 type Tab = "prices" | "rental" | "rules";
 
-export function Pricing() {
-  const { pricing } = siteContent;
+interface PricingProps {
+  data: SiteContent["pricing"];
+}
+
+export function Pricing({ data: pricing }: PricingProps) {
   const [activeTab, setActiveTab] = useState<Tab>("prices");
   const [bookingOpen, setBookingOpen] = useState(false);