📝(docs) add pip component documentation

add jsdoc comments to pip components and hooks

src/frontend/src/features/rooms/livekit/components/DocumentPiPPortal.tsx

@@ -29,6 +29,12 @@ const copyStyles = (source: Document, target: Document) => {
   })
 }
 
+/**
+ * React Portal that renders children into a Document Picture-in-Picture window.
+ * Handles PiP window lifecycle, style injection, React root management, and uses UNSAFE_PortalProvider
+ * to ensure React Aria overlays render correctly within the PiP window.
+ * Creates a fresh React root on reopen to prevent black screen issues.
+ */
 export const DocumentPiPPortal = ({
   isOpen,
   width,

src/frontend/src/features/rooms/livekit/components/PipControlBar.tsx

@@ -9,7 +9,10 @@ import { HandToggle } from './controls/HandToggle'
 import { OptionsButton } from './controls/Options/OptionsButton'
 import { StartMediaButton } from './controls/StartMediaButton'
 
-// Compact PiP toolbar; keep all PiP-specific controls in one place.
+/**
+ * Compact control bar for the Picture-in-Picture window.
+ * Centralizes all PiP controls (devices, reactions, screen share, options, etc.) in one reusable component.
+ */
 export const PipControlBar = ({
   showScreenShare,
 }: {

src/frontend/src/features/rooms/livekit/components/PipView.tsx

@@ -23,7 +23,11 @@ const pickTrackForPip = (
   return tracks[0]
 }
 
-// Renders the PiP viewport and a compact control bar inside the PiP window.
+/**
+ * Main view component for the Picture-in-Picture window.
+ * Handles track selection (prioritizes screen share), layout switching (grid for multiple participants),
+ * and renders the control bar and side panel within the PiP window.
+ */
 export const PipView = () => {
   const tracks = useTracks(
     [

src/frontend/src/features/rooms/livekit/components/RoomPiP.tsx

@@ -2,6 +2,10 @@ import { DocumentPiPPortal } from './DocumentPiPPortal'
 import { PipView } from './PipView'
 import { useRoomPiP } from '../hooks/useRoomPiP'
 
+/**
+ * Wrapper that mounts the PiP UI when room-level PiP state is enabled.
+ * Bridges RoomPiPProvider state with DocumentPiPPortal and PipView rendering.
+ */
 export const RoomPiP = () => {
   const { isOpen, close } = useRoomPiP()
 

src/frontend/src/features/rooms/livekit/components/controls/Options/PipOptionsMenu.tsx

@@ -11,14 +11,17 @@ type PipOptionsMenuProps = {
   label: string
 }
 
-// PiP-specific options menu positioned locally above the trigger button.
+/**
+ * PiP-specific options menu with absolute positioning for correct alignment in PiP window.
+ * Renders locally (unlike standard Menu) and closes automatically on item click or outside click.
+ */
 export const PipOptionsMenu = ({
   wrapperRef,
   isOpen,
   setIsOpen,
   label,
 }: PipOptionsMenuProps) => {
-  // Close menu when a menu item action completes (e.g., transcription, effects).
+  // Close menu when a menu item action completes (e.g., transcription, effects, recording).
   useEffect(() => {
     if (!isOpen) return
     const doc = wrapperRef.current?.ownerDocument ?? document

src/frontend/src/features/rooms/livekit/hooks/RoomPiPProvider.tsx

@@ -1,6 +1,11 @@
 import { useCallback, useMemo, useState } from 'react'
 import { RoomPiPContext } from './roomPiPContext'
 
+/**
+ * Context Provider that manages Picture-in-Picture state at the room level.
+ * Handles open/closed state, browser support detection, and exposes open/close/toggle functions.
+ * Components access PiP state via the useRoomPiP hook.
+ */
 export const RoomPiPProvider = ({
   children,
 }: {

src/frontend/src/primitives/useOverlayPortalContainer.tsx

@@ -1,20 +1,23 @@
 import { useMemo } from 'react'
 import { useUNSAFE_PortalContext } from '@react-aria/overlays'
 
+/**
+ * Hook to retrieve the portal container for overlays (menus, tooltips, popovers).
+ * Returns the container from UNSAFE_PortalProvider context (pip-root in PiP, undefined in main window).
+ */
 export const useOverlayPortalContainer = () => {
   const { getContainer } = useUNSAFE_PortalContext()
 
-  // Read the portal container provided by UNSAFE_PortalProvider.
-  // This is how overlays know which document/window they should render into.
-  // "UNSAFE" means we're overriding the library default container on purpose.
   return useMemo(() => getContainer?.() ?? undefined, [getContainer])
 }
 
+/**
+ * Hook to retrieve the boundary element for overlay positioning.
+ * Returns the portal container in PiP (for PiP-relative positioning), undefined in main window.
+ */
 export const useOverlayBoundaryElement = () => {
   const portalContainer = useOverlayPortalContainer()
   return useMemo(() => {
-    // Use the portal container as the positioning boundary.
-    // In PiP this keeps overlays positioned relative to the PiP window.
     if (portalContainer) return portalContainer
     return undefined
   }, [portalContainer])