Add custom domain support

frontend/src/lib/api.ts

@@ -50,6 +50,8 @@ export type Relay = {
   status: string
   sync_error: string
   synced: number
+  custom_domain: string
+  custom_domain_verified: number
   info_name: string
   info_icon: string
   info_description: string
@@ -76,6 +78,7 @@ export type CreateRelayInput = {
   blossom_enabled?: number
   livekit_enabled?: number
   push_enabled?: number
+  custom_domain?: string
 }
 
 export type UpdateRelayInput = {
@@ -91,6 +94,7 @@ export type UpdateRelayInput = {
   blossom_enabled?: number
   livekit_enabled?: number
   push_enabled?: number
+  custom_domain?: string
 }
 
 export type Tenant = {

frontend/src/lib/useCustomDomain.ts

@@ -0,0 +1,39 @@
+import { createSignal } from "solid-js"
+import type { Relay } from "@/lib/api"
+import { getRelay, updateRelay } from "@/lib/api"
+
+export default function useCustomDomain(relayId: () => string, mutate: (relay: Relay) => void) {
+  const [saving, setSaving] = createSignal(false)
+  const [verifying, setVerifying] = createSignal(false)
+  const [error, setError] = createSignal<string>()
+
+  async function saveDomain(domain: string) {
+    setSaving(true)
+    setError(undefined)
+    try {
+      const updated = await updateRelay(relayId(), { custom_domain: domain })
+      mutate(updated)
+    } catch (e: unknown) {
+      setError(e instanceof Error ? e.message : "Failed to save domain")
+    } finally {
+      setSaving(false)
+    }
+  }
+
+  // Verification runs in a background poller on the backend; reload the relay so
+  // the UI picks up the latest custom_domain_verified state.
+  async function verifyDomain() {
+    setVerifying(true)
+    setError(undefined)
+    try {
+      const updated = await getRelay(relayId())
+      mutate(updated)
+    } catch (e: unknown) {
+      setError(e instanceof Error ? e.message : "Verification failed")
+    } finally {
+      setVerifying(false)
+    }
+  }
+
+  return { saving, verifying, error, saveDomain, verifyDomain }
+}