feat(call): add docked call panel and remote cursor overlay

- Implemented DockedCallPanel component to render the docked call interface when an active call is present.
- Created RemoteCursorOverlay component to display remote cursor positions during screen sharing.
- Added hooks for managing docked call state and remote cursor functionality.
- Introduced pending drag state management for seamless transitions between docked and floating states.
- Developed embed filter management components for personal and room-wide settings, allowing users to customize URL embed visibility.
- Implemented auto-joining functionality for rooms within spaces, enhancing user experience during space navigation.
- Added state management for tracking joining progress of rooms in spaces.

src/app/pages/client/SidebarNav.tsx

@@ -18,6 +18,7 @@ import {
   SearchTab,
 } from './sidebar';
 import { CreateTab } from './sidebar/CreateTab';
+import { HiddenSpacesTabs } from './sidebar/SpaceTabs';
 
 export function SidebarNav() {
   const scrollRef = useRef<HTMLDivElement>(null);
@@ -37,6 +38,7 @@ export function SidebarNav() {
               <ExploreTab />
               <CreateTab />
             </SidebarStack>
+            <HiddenSpacesTabs />
           </Scroll>
         }
         sticky={