feat: P1 features — voice speed, private receipts, room filter, favorites, invite link, poll creation

P1-5: Voice message playback speed toggle (0.75×/1×/1.5×/2×) in AudioContent.tsx
P1-10: Private read receipts toggle in Privacy settings; wired to notifications.ts
P1-3: Room filter input on Home tab and DMs tab (client-side, clears on tab switch)
P1-8: Favorite rooms via m.favourite tag — Favorites section in Home sidebar, star/unstar in right-click menu
P1-9: Room invite link + QR code in room settings (Share Room tile, api.qrserver.com QR)
P1-6: Poll creation modal in composer (PollCreator.tsx, sends m.poll.start)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/features/room-settings/general/General.tsx

@@ -11,6 +11,7 @@ import {
   RoomLocalAddresses,
   RoomPublishedAddresses,
   RoomPublish,
+  RoomShareInvite,
   RoomUpgrade,
 } from '../../common-settings/general';
 import { useRoomCreators } from '../../../hooks/useRoomCreators';
@@ -58,6 +59,10 @@ export function General({ requestClose }: GeneralProps) {
                 <RoomPublishedAddresses permissions={permissions} />
                 <RoomLocalAddresses permissions={permissions} />
               </Box>
+              <Box direction="Column" gap="100">
+                <Text size="L400">Share</Text>
+                <RoomShareInvite />
+              </Box>
               <Box direction="Column" gap="100">
                 <Text size="L400">Advanced Options</Text>
                 <RoomUpgrade permissions={permissions} requestClose={requestClose} />