fix(threads): drop the fallback root quote on every thread reply; add Threads + Widgets to the mobile room menu (#165, #211)

Inside the thread panel each reply rendered a 'Thread ↩ <root author> <root
text…>' quote because the spec's fallback reply relation (is_falling_back
+ m.in_reply_to root) was treated like a real reply — noise on every row
when the root is already pinned at the top. Genuine reply-to-a-reply
quotes are kept. The Threads list and Widgets panel had desktop-only
header buttons and no way to open them on a phone; both are now in the
mobile ⋮ menu next to Members / Media Gallery.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA

src/app/features/room/RoomViewHeader.tsx

@@ -107,6 +107,10 @@ const RoomMenu = forwardRef<HTMLDivElement, RoomMenuProps>(
     const [reportRoomOpen, setReportRoomOpen] = useState(false);
     const [bookmarksOpen, setBookmarksOpen] = useAtom(bookmarksPanelAtom);
     const [mobileMembers, setMobileMembers] = useAtom(mobileMembersPanelAtom);
+    // [Gitea #165 / #211] Threads list and Widgets had desktop-only header
+    // buttons and no mobile entry point at all.
+    const [threadsList, setThreadsList] = useAtom(threadsListAtom);
+    const [widgets, setWidgets] = useAtom(widgetsPanelAtom);
 
     const handleMarkAsRead = () => {
       markAsRead(mx, room.roomId, hideActivity);
@@ -226,6 +230,38 @@ const RoomMenu = forwardRef<HTMLDivElement, RoomMenuProps>(
               </Text>
             </MenuItem>
           )}
+          {screenSize === ScreenSize.Mobile && (
+            <MenuItem
+              onClick={() => {
+                setThreadsList(!threadsList);
+                requestClose();
+              }}
+              size="300"
+              after={<Icon size="100" src={Icons.Thread} filled={threadsList} />}
+              radii="300"
+              aria-pressed={threadsList}
+            >
+              <Text style={{ flexGrow: 1 }} as="span" size="T300" truncate>
+                Threads
+              </Text>
+            </MenuItem>
+          )}
+          {screenSize === ScreenSize.Mobile && (
+            <MenuItem
+              onClick={() => {
+                setWidgets(!widgets);
+                requestClose();
+              }}
+              size="300"
+              after={<Icon size="100" src={Icons.Category} filled={widgets} />}
+              radii="300"
+              aria-pressed={widgets}
+            >
+              <Text style={{ flexGrow: 1 }} as="span" size="T300" truncate>
+                Widgets
+              </Text>
+            </MenuItem>
+          )}
           {!isServerNotice && (
             <MenuItem
               onClick={handleInvite}