Make voice rooms in sidebar reactive

src/app/core/state.ts

@@ -663,6 +663,28 @@ export const displayRoom = (url: string, h: string) => getRoom(makeRoomId(url, h
 
 export const roomComparator = (url: string) => (h: string) => displayRoom(url, h).toLowerCase()
 
+export const deriveRoomsWithLivekit = (url: string) =>
+  derived(roomsById, $roomsById => {
+    const set = new Set<string>()
+    for (const room of $roomsById.values()) {
+      if (room.url === url && room.event?.tags?.some(t => t[0] === "livekit")) {
+        set.add(room.h)
+      }
+    }
+    return set
+  })
+
+export const deriveRoomsNoText = (url: string) =>
+  derived(roomsById, $roomsById => {
+    const set = new Set<string>()
+    for (const room of $roomsById.values()) {
+      if (room.url === url && room.event?.tags?.some(t => t[0] === "no-text")) {
+        set.add(room.h)
+      }
+    }
+    return set
+  })
+
 export const roomHasLivekit = (url: string, h: string) => {
   const room = getRoom(makeRoomId(url, h))
   return room?.event?.tags?.some(t => t[0] === "livekit") ?? false