init: arcadia-admin — admin webapp for arcadia-core, cloned from vibespace

Initial commit. Spun up via the docs/STARTER.md recipe: cp from vibespace,
reset git, rename package, set brand to "Arcadia Admin" with Shield icon
in app/lib/identity.ts.

Inherits the full Crema sibling-lib wiring including @crema/arcadia-client
(typed HTTP + Phoenix Channels realtime against arcadia-core) and
@crema/arcadia-auth-ui (login/signup/password-reset/2FA forms). The /login
route already renders <LoginForm>; <ArcadiaProvider> in app/root.tsx reads
VITE_ARCADIA_URL (default localhost:4000) and VITE_ARCADIA_TENANT (default
"default").

CLAUDE.md and README rewritten to frame this as the admin app for
arcadia-core. docs/STARTER.md removed — arcadia-admin is a leaf consumer,
not a downstream starter.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/components/ui/chip.tsx

@@ -0,0 +1,48 @@
+import { cva, type VariantProps } from "class-variance-authority"
+import type { ComponentProps } from "react"
+
+import { cn } from "~/lib/utils"
+
+const chipVariants = cva(
+  "inline-flex shrink-0 items-center gap-1 rounded-full border text-xs font-medium whitespace-nowrap transition-colors outline-none select-none focus-visible:ring-3 focus-visible:ring-ring/50 disabled:pointer-events-none disabled:opacity-50 aria-pressed:border-transparent [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-3.5",
+  {
+    variants: {
+      variant: {
+        default:
+          "border-border bg-background text-foreground hover:bg-muted aria-pressed:bg-primary aria-pressed:text-primary-foreground",
+        secondary:
+          "border-transparent bg-secondary text-secondary-foreground hover:bg-secondary/80 aria-pressed:bg-primary aria-pressed:text-primary-foreground",
+      },
+      size: {
+        default: "h-7 px-3",
+        sm: "h-6 px-2.5",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+      size: "default",
+    },
+  }
+)
+
+function Chip({
+  className,
+  variant = "default",
+  size = "default",
+  active,
+  type = "button",
+  ...props
+}: ComponentProps<"button"> &
+  VariantProps<typeof chipVariants> & { active?: boolean }) {
+  return (
+    <button
+      data-slot="chip"
+      type={type}
+      aria-pressed={active}
+      className={cn(chipVariants({ variant, size, className }))}
+      {...props}
+    />
+  )
+}
+
+export { Chip, chipVariants }