Fix deleted rooms persisting in navigation

Rooms were staying in the sidebar after deletion because the timestamp
comparison used gt (strictly greater than). When the relay generates a
ROOM_DELETE event at the same timestamp as the ROOM_META, gt returns
false and the room survives the filter. Switch to gte so equal
timestamps correctly suppress the room.

Also fetch ROOM_DELETE events alongside ROOM_META in loadRoom so that
direct navigation to a deleted room picks up the delete, and remove
the room from the user's group list on successful deletion so it drops
out of favorites immediately.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/app/components/RoomDetail.svelte

@@ -122,6 +122,7 @@
           repository.removeEvent(thunk.event.id)
           pushToast({theme: "error", message})
         } else {
+          await removeRoomMembership(url, h)
           goto(makeSpacePath(url))
         }
       },

src/app/core/state.ts

@@ -5,7 +5,7 @@ import {derived, readable, writable} from "svelte/store"
 import * as nip19 from "nostr-tools/nip19"
 import {
   on,
-  gt,
+  gte,
   max,
   spec,
   call,
@@ -596,6 +596,9 @@ export const splitRoomId = (id: string) => id.split("'")
 export const hasNip29 = (relay?: RelayProfile) =>
   Boolean(relay?.supported_nips?.map?.(String)?.includes?.("29"))
 
+const getRoomDeleteId = (event: TrustedEvent) =>
+  getTagValue("h", event.tags) || getTagValue("d", event.tags)
+
 export const roomMetaEventsByIdByUrl = deriveEventsByIdByUrl({
   tracker,
   repository,
@@ -610,7 +613,9 @@ export const roomsByUrl = derived(roomMetaEventsByIdByUrl, roomMetaEventsByIdByU
     const deletedByH = new Map<string, number>()
 
     for (const event of deleteEvents) {
-      for (const h of getTagValues("h", event.tags)) {
+      const h = getRoomDeleteId(event)
+
+      if (h) {
         deletedByH.set(h, max([deletedByH.get(h), event.created_at]))
       }
     }
@@ -620,7 +625,7 @@ export const roomsByUrl = derived(roomMetaEventsByIdByUrl, roomMetaEventsByIdByU
     for (const event of metaEvents) {
       const meta = tryCatch(() => readRoomMeta(event))
 
-      if (!meta || gt(deletedByH.get(meta.h), meta.event.created_at)) {
+      if (!meta || gte(deletedByH.get(meta.h), meta.event.created_at)) {
         continue
       }
 
@@ -651,7 +656,10 @@ export const loadRoom = call(() => {
 
     await load({
       relays: [url],
-      filters: [{kinds: [ROOM_META], "#d": [h]}],
+      filters: [
+        {kinds: [ROOM_META], "#d": [h]},
+        {kinds: [ROOM_DELETE], "#h": [h]},
+      ],
     })
   }