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/lib/profile.ts

@@ -0,0 +1,115 @@
+// User profile — name, email, title, bio, signature, default agent.
+// Persisted in localStorage; reactive across tabs.
+
+import { useEffect, useSyncExternalStore } from "react"
+
+export type Profile = {
+  name: string
+  email: string
+  title: string
+  bio: string
+  signature: string
+  avatarUrl: string
+  defaultAgentId: string
+}
+
+export const DEFAULT_PROFILE: Profile = {
+  name: "Signed-in user",
+  email: "user@example.com",
+  title: "",
+  bio: "",
+  signature: "",
+  avatarUrl: "",
+  defaultAgentId: "",
+}
+
+const STORAGE_KEY = "crema.profile"
+const CHANGE_EVENT = "crema:profile-change"
+
+function readFromStorage(): Profile {
+  if (typeof window === "undefined") return DEFAULT_PROFILE
+  try {
+    const raw = localStorage.getItem(STORAGE_KEY)
+    if (!raw) return DEFAULT_PROFILE
+    const parsed = JSON.parse(raw) as Partial<Profile>
+    return {
+      name:
+        typeof parsed.name === "string" && parsed.name.trim().length > 0
+          ? parsed.name
+          : DEFAULT_PROFILE.name,
+      email:
+        typeof parsed.email === "string" ? parsed.email : DEFAULT_PROFILE.email,
+      title:
+        typeof parsed.title === "string" ? parsed.title : DEFAULT_PROFILE.title,
+      bio: typeof parsed.bio === "string" ? parsed.bio : DEFAULT_PROFILE.bio,
+      signature:
+        typeof parsed.signature === "string"
+          ? parsed.signature
+          : DEFAULT_PROFILE.signature,
+      avatarUrl:
+        typeof parsed.avatarUrl === "string"
+          ? parsed.avatarUrl
+          : DEFAULT_PROFILE.avatarUrl,
+      defaultAgentId:
+        typeof parsed.defaultAgentId === "string"
+          ? parsed.defaultAgentId
+          : DEFAULT_PROFILE.defaultAgentId,
+    }
+  } catch {
+    return DEFAULT_PROFILE
+  }
+}
+
+export function loadProfile(): Profile {
+  return readFromStorage()
+}
+
+export function saveProfile(next: Profile) {
+  if (typeof window === "undefined") return
+  localStorage.setItem(STORAGE_KEY, JSON.stringify(next))
+  window.dispatchEvent(new CustomEvent(CHANGE_EVENT))
+}
+
+export function resetProfile() {
+  saveProfile(DEFAULT_PROFILE)
+}
+
+export function profileInitials(name: string): string {
+  const words = name.trim().split(/\s+/).filter(Boolean)
+  if (words.length === 0) return "?"
+  if (words.length === 1) return words[0].slice(0, 2).toUpperCase()
+  return (words[0][0] + words[words.length - 1][0]).toUpperCase()
+}
+
+let cached: Profile | null = null
+
+function subscribe(cb: () => void): () => void {
+  const onChange = () => {
+    cached = null
+    cb()
+  }
+  window.addEventListener(CHANGE_EVENT, onChange)
+  window.addEventListener("storage", (e) => {
+    if (e.key === STORAGE_KEY) onChange()
+  })
+  return () => {
+    window.removeEventListener(CHANGE_EVENT, onChange)
+  }
+}
+
+function getSnapshot(): Profile {
+  if (!cached) cached = readFromStorage()
+  return cached
+}
+
+function getServerSnapshot(): Profile {
+  return DEFAULT_PROFILE
+}
+
+export function useProfile(): Profile {
+  const value = useSyncExternalStore(subscribe, getSnapshot, getServerSnapshot)
+  useEffect(() => {
+    cached = null
+  }, [])
+  return value
+}