Improve group membership detection

src/app/components/MenuSpaceRoomItem.svelte

@@ -3,7 +3,7 @@
   import SecondaryNavItem from "@lib/components/SecondaryNavItem.svelte"
   import ChannelName from "@app/components/ChannelName.svelte"
   import {makeRoomPath} from "@app/routes"
-  import {deriveChannel, channelIsLocked} from "@app/state"
+  import {deriveChannel} from "@app/state"
   import {notifications} from "@app/notifications"
 
   interface Props {
@@ -23,7 +23,7 @@
   href={path}
   {replaceState}
   notification={notify ? $notifications.has(path) : false}>
-  {#if channelIsLocked($channel)}
+  {#if $channel?.closed || $channel?.private}
     <Icon icon="lock" size={4} />
   {:else}
     <Icon icon="hashtag" />

src/app/components/RoomCreate.svelte

@@ -2,7 +2,7 @@
   import {goto} from "$app/navigation"
   import {randomId} from "@welshman/lib"
   import {displayRelayUrl} from "@welshman/util"
-  import {deriveRelay} from "@welshman/app"
+  import {deriveRelay, getThunkError} from "@welshman/app"
   import {preventDefault} from "@lib/html"
   import Field from "@lib/components/Field.svelte"
   import Spinner from "@lib/components/Spinner.svelte"
@@ -11,7 +11,7 @@
   import ModalHeader from "@lib/components/ModalHeader.svelte"
   import ModalFooter from "@lib/components/ModalFooter.svelte"
   import {hasNip29, loadChannel} from "@app/state"
-  import {addRoomMembership, createRoom, editRoom, joinRoom, getThunkError} from "@app/commands"
+  import {createRoom, editRoom, joinRoom} from "@app/commands"
   import {makeSpacePath} from "@app/routes"
   import {pushToast} from "@app/toast"
 
@@ -43,7 +43,6 @@
 
     await loadChannel(url, room)
 
-    addRoomMembership(url, room, name)
     goto(makeSpacePath(url, room))
   }