feat: Guest Management & RSVP system (7ead7758)

Backend:
- POST /api/events/:id/guests — add guest, auto-generate RSVP token (128-bit
  crypto.randomBytes), build wa.me WhatsApp deep-link, store in invitations
- GET /api/events/:id/guests — list with pg_trgm fuzzy Hebrew name search,
  status filter, pagination; returns RSVP summary + capacity warning at 90%
- GET /api/events/:id/guests/export — CSV export with UTF-8 BOM for Excel
  Hebrew support (json2csv)
- PUT /api/guests/:id — PATCH-style update (COALESCE), organizer ownership check
- DELETE /api/guests/:id — hard delete per Israeli Privacy Law 2023
- GET /api/rsvp/:token — public (no auth), marks opened_at on first visit
- POST /api/rsvp/:token — idempotent RSVP submit, supports dietary update,
  handles cancelled events (410)
- Israeli phone normalization: 05X-XXXXXXX → +972XXXXXXXXX E.164
- Capacity warning returned in add/list/update responses when confirmed ≥ 90%
  of venue_capacity (fire safety compliance)

Frontend:
- GuestListPage — sortable/filterable table, inline RSVP status override,
  WhatsApp send links, delete with confirmation, 30s polling for real-time updates
- AddGuestForm — RTL Hebrew form, all guest fields, shows WhatsApp link on success
- RsvpSummaryCard — 4-metric summary (total/confirmed/declined/pending) + capacity warning
- RsvpPage — public page at /rsvp/:token, shows event details, confirm/decline,
  dietary preference update; no login required
- New UI components: Badge, Select (shadcn/ui compatible)
- App.tsx: added /events/:eventId/guests (protected) and /rsvp/:token (public) routes

Build: 0 TS errors, all routes wired in server.js

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

client/src/components/ui/badge.tsx

@@ -0,0 +1,30 @@
+import * as React from 'react';
+import { cva, type VariantProps } from 'class-variance-authority';
+import { cn } from '@/lib/utils';
+
+const badgeVariants = cva(
+  'inline-flex items-center rounded-full border px-2.5 py-0.5 text-xs font-semibold transition-colors',
+  {
+    variants: {
+      variant: {
+        default: 'border-transparent bg-primary text-primary-foreground',
+        secondary: 'border-transparent bg-muted text-muted-foreground',
+        destructive: 'border-transparent bg-destructive text-destructive-foreground',
+        outline: 'text-foreground',
+        success: 'border-transparent bg-green-100 text-green-800',
+        warning: 'border-transparent bg-yellow-100 text-yellow-800',
+      },
+    },
+    defaultVariants: { variant: 'default' },
+  }
+);
+
+export interface BadgeProps
+  extends React.HTMLAttributes<HTMLDivElement>,
+    VariantProps<typeof badgeVariants> {}
+
+function Badge({ className, variant, ...props }: BadgeProps) {
+  return <div className={cn(badgeVariants({ variant }), className)} {...props} />;
+}
+
+export { Badge, badgeVariants };