Address PR comments on RoomForm

src/app/core/state.ts

@@ -146,6 +146,7 @@ import {
   displayProfileByPubkey,
   getProfile,
 } from "@welshman/app"
+import {checkRelayHasLivekit} from "$lib/livekit"
 import {readFeed} from "@lib/feeds"
 
 export const fromCsv = (s: string) => (s || "").split(",").filter(identity)
@@ -1197,6 +1198,12 @@ export const deriveSupportedMethods = simpleCache(([url]: [string]) => {
   })
 })
 
+export const deriveHasLivekit = simpleCache(([url]: [string]) =>
+  readable<boolean | undefined>(undefined, set => {
+    checkRelayHasLivekit(url).then(has => set(has))
+  }),
+)
+
 export const deriveTimeout = (timeout: number) => {
   const store = writable<boolean>(false)