Do some refactoring

frontend/src/pages/admin/AdminRelayDetail.tsx

@@ -1,6 +1,9 @@
 import { useParams, A } from "@solidjs/router"
 import { createResource, createSignal, Show } from "solid-js"
 import { adminDeactivateRelay, adminGetRelay } from "../../lib/api"
+import BackLink from "../../components/BackLink"
+import PageContainer from "../../components/PageContainer"
+import ResourceState from "../../components/ResourceState"
 
 export default function AdminRelayDetail() {
   const params = useParams()
@@ -24,17 +27,16 @@ export default function AdminRelayDetail() {
   }
 
   return (
-    <div class="max-w-4xl mx-auto px-4 py-8">
-      <div class="flex items-center gap-2 mb-6">
-        <A href="/admin/relays" class="text-gray-500 hover:text-gray-700">← Relays</A>
-      </div>
+    <PageContainer>
+      <BackLink href="/admin/relays" label="Relays" />
 
-      <Show when={relay.loading}>
-        <p class="text-gray-500 mb-4">Loading relay...</p>
-      </Show>
-      <Show when={relay.error && !relay.loading}>
-        <p class="text-red-600 mb-4">Failed to load relay.</p>
-      </Show>
+      <ResourceState
+        loading={relay.loading}
+        error={relay.error}
+        loadingText="Loading relay..."
+        errorText="Failed to load relay."
+        class="mb-4"
+      />
 
       <Show when={relay()}>
         {(r) => (
@@ -69,6 +71,6 @@ export default function AdminRelayDetail() {
       <Show when={error()}>
         <p class="mt-3 text-sm text-red-600">{error()}</p>
       </Show>
-    </div>
+    </PageContainer>
   )
 }

frontend/src/pages/admin/AdminRelayEdit.tsx

@@ -1,9 +1,12 @@
-import { A, useNavigate, useParams } from "@solidjs/router"
+import { useNavigate, useParams } from "@solidjs/router"
 import { Show, createEffect, createResource, createSignal } from "solid-js"
 import { adminGetRelay, adminUpdateRelay } from "../../lib/api"
 import RelayForm from "../../components/RelayForm"
 import { RELAY_PLAN_IDS, type RelayPlanId } from "../../lib/relayPlans"
 import { slugify } from "../../lib/slugify"
+import BackLink from "../../components/BackLink"
+import PageContainer from "../../components/PageContainer"
+import ResourceState from "../../components/ResourceState"
 
 export default function AdminRelayEdit() {
   const navigate = useNavigate()
@@ -50,18 +53,16 @@ export default function AdminRelayEdit() {
   }
 
   return (
-    <div class="max-w-2xl mx-auto px-4 py-8">
-      <div class="flex items-center gap-2 mb-6">
-        <A href={`/admin/relays/${params.id}`} class="text-gray-500 hover:text-gray-700">← Back</A>
-      </div>
+    <PageContainer size="narrow">
+      <BackLink href={`/admin/relays/${params.id}`} label="Back" />
       <h1 class="text-2xl font-bold text-gray-900 mb-6">Edit Relay (Admin)</h1>
 
-      <Show when={relay.loading}>
-        <p class="text-gray-500">Loading relay...</p>
-      </Show>
-      <Show when={relay.error && !relay.loading}>
-        <p class="text-red-600">Failed to load relay.</p>
-      </Show>
+      <ResourceState
+        loading={relay.loading}
+        error={relay.error}
+        loadingText="Loading relay..."
+        errorText="Failed to load relay."
+      />
 
       <Show when={relay() && !relay.loading}>
         <RelayForm
@@ -83,6 +84,6 @@ export default function AdminRelayEdit() {
           submittingLabel="Saving..."
         />
       </Show>
-    </div>
+    </PageContainer>
   )
 }

frontend/src/pages/admin/AdminRelays.tsx

@@ -1,6 +1,8 @@
 import { A } from "@solidjs/router"
 import { createMemo, createResource, createSignal, For, Show } from "solid-js"
 import { adminListRelays } from "../../lib/api"
+import PageContainer from "../../components/PageContainer"
+import ResourceState from "../../components/ResourceState"
 
 export default function AdminRelays() {
   const [query, setQuery] = createSignal("")
@@ -19,7 +21,7 @@ export default function AdminRelays() {
   })
 
   return (
-    <div class="max-w-4xl mx-auto px-4 py-8">
+    <PageContainer>
       <h1 class="text-2xl font-bold text-gray-900 mb-6">All Relays</h1>
       <input
         type="search"
@@ -29,12 +31,12 @@ export default function AdminRelays() {
         class="w-full border border-gray-300 rounded-lg px-3 py-2 mb-6 focus:outline-none focus:ring-2 focus:ring-blue-500"
       />
 
-      <Show when={relays.loading}>
-        <p class="text-gray-500">Loading relays...</p>
-      </Show>
-      <Show when={relays.error && !relays.loading}>
-        <p class="text-red-600">Failed to load relays.</p>
-      </Show>
+      <ResourceState
+        loading={relays.loading}
+        error={relays.error}
+        loadingText="Loading relays..."
+        errorText="Failed to load relays."
+      />
       <Show when={(filtered().length ?? 0) > 0} fallback={<p class="text-gray-500">No relays found.</p>}>
         <ul class="space-y-3">
           <For each={filtered()}>
@@ -55,6 +57,6 @@ export default function AdminRelays() {
           </For>
         </ul>
       </Show>
-    </div>
+    </PageContainer>
   )
 }

frontend/src/pages/admin/AdminTenantDetail.tsx

@@ -1,6 +1,9 @@
 import { useParams, A } from "@solidjs/router"
 import { createResource, createSignal, For, Show } from "solid-js"
 import { adminGetTenant, adminUpdateTenantStatus } from "../../lib/api"
+import BackLink from "../../components/BackLink"
+import PageContainer from "../../components/PageContainer"
+import ResourceState from "../../components/ResourceState"
 
 export default function AdminTenantDetail() {
   const params = useParams()
@@ -24,18 +27,17 @@ export default function AdminTenantDetail() {
   }
 
   return (
-    <div class="max-w-4xl mx-auto px-4 py-8">
-      <div class="flex items-center gap-2 mb-6">
-        <A href="/admin/tenants" class="text-gray-500 hover:text-gray-700">← Tenants</A>
-      </div>
+    <PageContainer>
+      <BackLink href="/admin/tenants" label="Tenants" />
       <h1 class="text-2xl font-bold text-gray-900 mb-6">Tenant {params.id}</h1>
 
-      <Show when={detail.loading}>
-        <p class="text-gray-500 mb-4">Loading tenant...</p>
-      </Show>
-      <Show when={detail.error && !detail.loading}>
-        <p class="text-red-600 mb-4">Failed to load tenant.</p>
-      </Show>
+      <ResourceState
+        loading={detail.loading}
+        error={detail.error}
+        loadingText="Loading tenant..."
+        errorText="Failed to load tenant."
+        class="mb-4"
+      />
 
       <div class="space-y-6">
         <section class="bg-white border border-gray-200 rounded-xl p-6">
@@ -93,6 +95,6 @@ export default function AdminTenantDetail() {
           <p class="text-sm text-red-600">{error()}</p>
         </Show>
       </div>
-    </div>
+    </PageContainer>
   )
 }

frontend/src/pages/admin/AdminTenants.tsx

@@ -3,6 +3,8 @@ import { createEffect, createMemo, createResource, createSignal, For, onCleanup,
 import { getProfilePicture } from "applesauce-core/helpers/profile"
 import { adminListTenants } from "../../lib/api"
 import { eventStore, primeProfiles } from "../../lib/nostr"
+import PageContainer from "../../components/PageContainer"
+import ResourceState from "../../components/ResourceState"
 
 function shortenPubkey(pubkey: string) {
   if (pubkey.length <= 16) return pubkey
@@ -48,7 +50,7 @@ export default function AdminTenants() {
   })
 
   return (
-    <div class="max-w-4xl mx-auto px-4 py-8">
+    <PageContainer>
       <h1 class="text-2xl font-bold text-gray-900 mb-6">Tenants</h1>
       <input
         type="search"
@@ -58,12 +60,12 @@ export default function AdminTenants() {
         class="w-full border border-gray-300 rounded-lg px-3 py-2 mb-6 focus:outline-none focus:ring-2 focus:ring-blue-500"
       />
 
-      <Show when={tenants.loading}>
-        <p class="text-gray-500">Loading tenants...</p>
-      </Show>
-      <Show when={tenants.error && !tenants.loading}>
-        <p class="text-red-600">Failed to load tenants.</p>
-      </Show>
+      <ResourceState
+        loading={tenants.loading}
+        error={tenants.error}
+        loadingText="Loading tenants..."
+        errorText="Failed to load tenants."
+      />
       <Show when={(filtered().length ?? 0) > 0} fallback={<p class="text-gray-500">No tenants found.</p>}>
         <ul class="space-y-3">
           <For each={filtered()}>
@@ -96,6 +98,6 @@ export default function AdminTenants() {
           </For>
         </ul>
       </Show>
-    </div>
+    </PageContainer>
   )
 }