fix(session): disable todo dock auto-scroll (#20840)

packages/app/src/pages/session/composer/session-todo-dock.tsx

@@ -7,7 +7,7 @@ import { useSpring } from "@opencode-ai/ui/motion-spring"
 import { TextReveal } from "@opencode-ai/ui/text-reveal"
 import { TextStrikethrough } from "@opencode-ai/ui/text-strikethrough"
 import { createResizeObserver } from "@solid-primitives/resize-observer"
-import { Index, createEffect, createMemo, on, onCleanup } from "solid-js"
+import { Index, createEffect, createMemo, onCleanup } from "solid-js"
 import { createStore } from "solid-js/store"
 import { composerEnabled, composerProbe } from "@/testing/session-composer"
 import { useLanguage } from "@/context/language"
@@ -210,76 +210,25 @@ export function SessionTodoDock(props: {
             opacity: `${Math.max(0, Math.min(1, 1 - hide()))}`,
           }}
         >
-          <TodoList todos={props.todos} open={!store.collapsed} />
+          <TodoList todos={props.todos} />
         </div>
       </div>
     </DockTray>
   )
 }
 
-function TodoList(props: { todos: Todo[]; open: boolean }) {
+function TodoList(props: { todos: Todo[] }) {
   const [store, setStore] = createStore({
     stuck: false,
-    scrolling: false,
-  })
-  let scrollRef!: HTMLDivElement
-  let timer: number | undefined
-
-  const inProgress = createMemo(() => props.todos.findIndex((todo) => todo.status === "in_progress"))
-
-  const ensure = () => {
-    if (!props.open) return
-    if (store.scrolling) return
-    if (!scrollRef || scrollRef.offsetParent === null) return
-
-    const el = scrollRef.querySelector("[data-in-progress]")
-    if (!(el instanceof HTMLElement)) return
-
-    const topFade = 16
-    const bottomFade = 44
-    const container = scrollRef.getBoundingClientRect()
-    const rect = el.getBoundingClientRect()
-    const top = rect.top - container.top + scrollRef.scrollTop
-    const bottom = rect.bottom - container.top + scrollRef.scrollTop
-    const viewTop = scrollRef.scrollTop + topFade
-    const viewBottom = scrollRef.scrollTop + scrollRef.clientHeight - bottomFade
-
-    if (top < viewTop) {
-      scrollRef.scrollTop = Math.max(0, top - topFade)
-    } else if (bottom > viewBottom) {
-      scrollRef.scrollTop = bottom - (scrollRef.clientHeight - bottomFade)
-    }
-
-    setStore("stuck", scrollRef.scrollTop > 0)
-  }
-
-  createEffect(
-    on([() => props.open, inProgress], () => {
-      if (!props.open || inProgress() < 0) return
-      requestAnimationFrame(ensure)
-    }),
-  )
-
-  onCleanup(() => {
-    if (!timer) return
-    window.clearTimeout(timer)
   })
 
   return (
     <div class="relative">
       <div
         class="px-3 pb-11 flex flex-col gap-1.5 max-h-42 overflow-y-auto no-scrollbar"
-        ref={scrollRef}
         style={{ "overflow-anchor": "none" }}
         onScroll={(e) => {
           setStore("stuck", e.currentTarget.scrollTop > 0)
-          setStore("scrolling", true)
-          if (timer) window.clearTimeout(timer)
-          timer = window.setTimeout(() => {
-            setStore("scrolling", false)
-            if (inProgress() < 0) return
-            requestAnimationFrame(ensure)
-          }, 250)
         }}
       >
         <Index each={props.todos}>