Do some refactoring

frontend/src/components/BackLink.tsx

@@ -0,0 +1,14 @@
+import { A } from "@solidjs/router"
+
+type BackLinkProps = {
+  href: string
+  label: string
+}
+
+export default function BackLink(props: BackLinkProps) {
+  return (
+    <div class="flex items-center gap-2 mb-6">
+      <A href={props.href} class="text-gray-500 hover:text-gray-700">← {props.label}</A>
+    </div>
+  )
+}

frontend/src/components/PageContainer.tsx

@@ -0,0 +1,12 @@
+import type { JSX } from "solid-js"
+
+type PageContainerProps = {
+  children: JSX.Element
+  size?: "narrow" | "wide"
+}
+
+export default function PageContainer(props: PageContainerProps) {
+  const maxWidthClass = () => (props.size === "narrow" ? "max-w-2xl" : "max-w-4xl")
+
+  return <div class={`${maxWidthClass()} mx-auto px-4 py-8`}>{props.children}</div>
+}

frontend/src/components/ResourceState.tsx

@@ -0,0 +1,22 @@
+import { Show } from "solid-js"
+
+type ResourceStateProps = {
+  loading: boolean
+  error: unknown
+  loadingText: string
+  errorText: string
+  class?: string
+}
+
+export default function ResourceState(props: ResourceStateProps) {
+  return (
+    <>
+      <Show when={props.loading}>
+        <p class={`text-gray-500 ${props.class ?? ""}`.trim()}>{props.loadingText}</p>
+      </Show>
+      <Show when={props.error && !props.loading}>
+        <p class={`text-red-600 ${props.class ?? ""}`.trim()}>{props.errorText}</p>
+      </Show>
+    </>
+  )
+}

frontend/src/pages/Account.tsx

@@ -1,5 +1,7 @@
 import { createMemo, createResource, createSignal, For, Show } from "solid-js"
 import { getTenant, listTenantInvoices, updateTenantBilling } from "../lib/api"
+import PageContainer from "../components/PageContainer"
+import ResourceState from "../components/ResourceState"
 
 export default function Account() {
   const [tenant, { refetch: refetchTenant }] = createResource(getTenant)
@@ -25,7 +27,7 @@ export default function Account() {
   }
 
   return (
-    <div class="max-w-4xl mx-auto px-4 py-8">
+    <PageContainer>
       <h1 class="text-2xl font-bold text-gray-900 mb-6">My Account</h1>
 
       <div class="space-y-6">
@@ -40,9 +42,12 @@ export default function Account() {
               )}
             </Show>
           </div>
-          <Show when={tenant.loading}>
-            <p class="text-gray-500">Loading account...</p>
-          </Show>
+          <ResourceState
+            loading={tenant.loading}
+            error={undefined}
+            loadingText="Loading account..."
+            errorText=""
+          />
         </section>
 
         <section class="bg-white border border-gray-200 rounded-xl p-6">
@@ -106,6 +111,6 @@ export default function Account() {
           </Show>
         </section>
       </div>
-    </div>
+    </PageContainer>
   )
 }

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>
   )
 }

frontend/src/pages/relays/RelayDetail.tsx

@@ -1,6 +1,9 @@
 import { useParams, A } from "@solidjs/router"
 import { createResource, createSignal, Show } from "solid-js"
 import { deactivateTenantRelay, getTenantRelay } from "../../lib/api"
+import BackLink from "../../components/BackLink"
+import PageContainer from "../../components/PageContainer"
+import ResourceState from "../../components/ResourceState"
 
 export default function RelayDetail() {
   const params = useParams()
@@ -24,18 +27,16 @@ export default function RelayDetail() {
   }
 
   return (
-    <div class="max-w-4xl mx-auto px-4 py-8">
-      <div class="flex items-center gap-2 mb-6">
-        <A href="/relays" class="text-gray-500 hover:text-gray-700">← Relays</A>
-      </div>
+    <PageContainer>
+      <BackLink href="/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()}>
         {(loadedRelay) => (
@@ -67,6 +68,6 @@ export default function RelayDetail() {
       <Show when={error()}>
         <p class="mt-3 text-sm text-red-600">{error()}</p>
       </Show>
-    </div>
+    </PageContainer>
   )
 }

frontend/src/pages/relays/RelayEdit.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 { getTenantRelay, updateTenantRelay } 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 RelayEdit() {
   const navigate = useNavigate()
@@ -50,18 +53,16 @@ export default function RelayEdit() {
   }
 
   return (
-    <div class="max-w-2xl mx-auto px-4 py-8">
-      <div class="flex items-center gap-2 mb-6">
-        <A href={`/relays/${params.id}`} class="text-gray-500 hover:text-gray-700">← Back</A>
-      </div>
+    <PageContainer size="narrow">
+      <BackLink href={`/relays/${params.id}`} label="Back" />
       <h1 class="text-2xl font-bold text-gray-900 mb-6">Edit Relay</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 RelayEdit() {
           submittingLabel="Saving..."
         />
       </Show>
-    </div>
+    </PageContainer>
   )
 }

frontend/src/pages/relays/RelayList.tsx

@@ -1,6 +1,8 @@
 import { A } from "@solidjs/router"
 import { createMemo, createResource, createSignal, For, Show } from "solid-js"
 import { listTenantRelays } from "../../lib/api"
+import PageContainer from "../../components/PageContainer"
+import ResourceState from "../../components/ResourceState"
 
 export default function RelayList() {
   const [relays] = createResource(listTenantRelays)
@@ -20,7 +22,7 @@ export default function RelayList() {
   })
 
   return (
-    <div class="max-w-4xl mx-auto px-4 py-8">
+    <PageContainer>
       <div class="flex items-center justify-between mb-6">
         <h1 class="text-2xl font-bold text-gray-900">My Relays</h1>
         <A
@@ -53,13 +55,12 @@ export default function RelayList() {
         </select>
       </div>
 
-      <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 match your filters.</p>}>
         <ul class="space-y-3">
@@ -83,6 +84,6 @@ export default function RelayList() {
           </For>
         </ul>
       </Show>
-    </div>
+    </PageContainer>
   )
 }