feat: portal redesign — shadcn/ui, React Query, Zod, isolated portals

Foundation:
- CLAUDE.md with full coding rules (tech stack, patterns, redirect rules)
- Install @tanstack/react-query, zod, react-hook-form, shadcn/ui deps
- CSS variables design system (Tailwind v4 + tw-animate-css)
- Shared components: Button, Input, Label, Card, Badge, Separator, Form
- PortalLoginShell: two-column login layout (branding left, form right)
- PortalNav: shared sidebar nav used by all portals
- ReactQueryProvider in root layout
- api-client.ts: typed fetch wrapper (no raw fetch in components)

Portal isolation:
- Sidebar now returns null for all non-chapter routes; portals own their layout
- Admin layout: auth guard + PortalNav (slate accent)
- Org layout: auth guard + PortalNav (violet accent)
- Member layout: server-side cookie check → MemberNav client component
- Chapter admin sidebar: PortalNav (blue accent)

Login pages (all use react-hook-form + Zod + PortalLoginShell):
- /login → defaults next to /search (was /) — fixes redirect bug
- /admin/login → replaces /admin
- /org/login → replaces /org
- /member-login → two-step phone+OTP with proper form validation

Portal selector (/) redesigned with accent border-left cards

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

apps/web/app/_components/ui/badge.tsx

@@ -0,0 +1,28 @@
+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-md border px-2.5 py-0.5 text-xs font-semibold transition-colors focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2',
+  {
+    variants: {
+      variant: {
+        default: 'border-transparent bg-primary text-primary-foreground shadow hover:bg-primary/80',
+        secondary: 'border-transparent bg-secondary text-secondary-foreground hover:bg-secondary/80',
+        destructive: 'border-transparent bg-destructive text-destructive-foreground shadow hover:bg-destructive/80',
+        outline: 'text-foreground',
+        success: 'border-transparent bg-emerald-100 text-emerald-700',
+        warning: 'border-transparent bg-amber-100 text-amber-700',
+      },
+    },
+    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 };