chore(native-chat): remove rail wake comments (#39585)

src/renderer/src/components/native-chat/viewport/rail/use-native-chat-rail-wake.ts

@@ -1,25 +1,14 @@
 import { useCallback, useEffect, useRef } from 'react'
-
-/** How long the rail stays lit after the last scroll input, before its CSS fade begins. */
 const NATIVE_CHAT_RAIL_WAKE_MS = 300
-/** Scroll events extend a wake this long after the input, so app-driven scrolls never keep it lit. */
 const NATIVE_CHAT_RAIL_SUSTAIN_MS = 1500
-
-/**
- * Lights the idle-dimmed message rail while the reader scrolls. Writes a data attribute on the
- * rail's node instead of state, so scrolling never re-renders the transcript.
- */
 export function useNativeChatRailWake(): {
   railRef: React.RefObject<HTMLDivElement | null>
   wake: () => void
-  /** A scroll event: keeps a just-lit rail lit through scrollbar drags and touch flings. */
   sustain: () => void
 } {
   const railRef = useRef<HTMLDivElement | null>(null)
   const timer = useRef<ReturnType<typeof setTimeout> | null>(null)
-  /** When the rail may go dark again. */
   const sleepAt = useRef(0)
-  /** Scroll events before this still belong to the reader's last input. */
   const sustainUntil = useRef(0)
 
   const wake = useCallback(() => {
@@ -27,7 +16,6 @@ export function useNativeChatRailWake(): {
     sleepAt.current = now + NATIVE_CHAT_RAIL_WAKE_MS
     sustainUntil.current = now + NATIVE_CHAT_RAIL_SUSTAIN_MS
     const rail = railRef.current
-    // Why: a gesture fires wheel events every frame; write the DOM and arm a timer once per gesture.
     if (rail && !('awake' in rail.dataset)) {
       rail.dataset.awake = ''
     }
@@ -49,7 +37,6 @@ export function useNativeChatRailWake(): {
   }, [])
 
   const sustain = useCallback(() => {
-    // Why: most scroll events (streaming, auto-follow) arrive with no wake pending; skip the clock read.
     if (timer.current === null) {
       return
     }