admin: completeness + UI consistency pass

Arcadia wiring:
- home: real Overview dashboard (tenants/users/audit/health probe) replacing the inherited Vibespace welcome tiles; skeleton loaders, refresh button, registers admin context
- profile: split into Account (synced via getUser/updateUser of session user) and local Preferences; updateSessionUser keeps the appbar in sync after edits
- session: drop unused signIn mock, add updateSessionUser, refresh tests
- profile schema: drop redundant Profile.name/email (session is the source of truth)
- routes: delete orphaned resources route + lib

Auth flows that previously 404'd:
- /signup, /login/forgot, /login/reset, /login/2fa wired via @crema/arcadia-auth-ui
- shared AuthShell + AuthBrand wrapper

Assistant tools (admin-tools.ts):
- +10 tools: deactivate_tenant, set_user_status, delete_user, list_memberships, list_roles, revoke_api_key, create_user, update_user, assign_role, remove_role
- list_memberships gains user_id filter for "tenants this user belongs to" queries
- search_kb / read_chunk: new token resolution (window override → VITE_ARCADIA_SEARCH_TOKEN service token → operator session JWT → "dev"); on 401/403 emit a tailored hint based on which token was used

UI consistency:
- new PageHeader component
- AppShell.title was unrendered — dropped; first-child padding on #main-content keeps the floating actions pill from colliding with header content
- removed dead "Sign in required" fallback cards from 14 routes (AppShell already redirects)
- stripped p-6 from outer wrappers across 14 routes (was double-padding under AppShell's own p-6)
- migrated home + tenants to PageHeader

arcadia-search ergonomics:
- scripts/mint-search-token.mjs + `npm run mint:search-token` mints HS512 JWT with required tenant_id claim, upserts VITE_ARCADIA_SEARCH_TOKEN into .env.local
- README/.env document the new VITE_ARCADIA_SEARCH_URL / VITE_ARCADIA_SEARCH_TOKEN knobs
- .env.local now gitignored

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

app/lib/profile.ts

@@ -1,11 +1,10 @@
-// User profile — name, email, title, bio, signature, default agent.
-// Persisted in localStorage; reactive across tabs.
+// Local user preferences — title, bio, signature, avatar, default agent.
+// Persisted in localStorage; reactive across tabs. Identity (name, email)
+// is owned by the arcadia session, not this store — see ~/lib/session.ts.
 
 import { useEffect, useSyncExternalStore } from "react"
 
 export type Profile = {
-  name: string
-  email: string
   title: string
   bio: string
   signature: string
@@ -14,8 +13,6 @@ export type Profile = {
 }
 
 export const DEFAULT_PROFILE: Profile = {
-  name: "Signed-in user",
-  email: "user@example.com",
   title: "",
   bio: "",
   signature: "",
@@ -33,12 +30,6 @@ function readFromStorage(): Profile {
     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,