feat(app): session timeline/turn rework (#13196)

Co-authored-by: David Hill <iamdavidhill@gmail.com>

packages/app/src/pages/session/session-prompt-dock.tsx

@@ -1,16 +1,17 @@
-import { For, Show } from "solid-js"
-import type { QuestionRequest } from "@opencode-ai/sdk/v2"
+import { For, Show, createEffect, createMemo, createSignal, on, onCleanup } from "solid-js"
+import type { QuestionRequest, Todo } from "@opencode-ai/sdk/v2"
 import { Button } from "@opencode-ai/ui/button"
 import { BasicTool } from "@opencode-ai/ui/basic-tool"
 import { PromptInput } from "@/components/prompt-input"
 import { QuestionDock } from "@/components/question-dock"
-import { questionSubtitle } from "@/pages/session/session-prompt-helpers"
+import { SessionTodoDock } from "@/components/session-todo-dock"
 
 export function SessionPromptDock(props: {
   centered: boolean
   questionRequest: () => QuestionRequest | undefined
   permissionRequest: () => { patterns: string[]; permission: string } | undefined
   blocked: boolean
+  todos: Todo[]
   promptReady: boolean
   handoffPrompt?: string
   t: (key: string, vars?: Record<string, string | number | boolean>) => string
@@ -22,10 +23,88 @@ export function SessionPromptDock(props: {
   onSubmit: () => void
   setPromptDockRef: (el: HTMLDivElement) => void
 }) {
+  const done = createMemo(
+    () =>
+      props.todos.length > 0 && props.todos.every((todo) => todo.status === "completed" || todo.status === "cancelled"),
+  )
+
+  const [dock, setDock] = createSignal(props.todos.length > 0)
+  const [closing, setClosing] = createSignal(false)
+  const [opening, setOpening] = createSignal(false)
+  let timer: number | undefined
+  let raf: number | undefined
+
+  const scheduleClose = () => {
+    if (timer) window.clearTimeout(timer)
+    timer = window.setTimeout(() => {
+      setDock(false)
+      setClosing(false)
+      timer = undefined
+    }, 400)
+  }
+
+  createEffect(
+    on(
+      () => [props.todos.length, done()] as const,
+      ([count, complete], prev) => {
+        if (raf) cancelAnimationFrame(raf)
+        raf = undefined
+
+        if (count === 0) {
+          if (timer) window.clearTimeout(timer)
+          timer = undefined
+          setDock(false)
+          setClosing(false)
+          setOpening(false)
+          return
+        }
+
+        if (!complete) {
+          if (timer) window.clearTimeout(timer)
+          timer = undefined
+          const wasHidden = !dock() || closing()
+          setDock(true)
+          setClosing(false)
+          if (wasHidden) {
+            setOpening(true)
+            raf = requestAnimationFrame(() => {
+              setOpening(false)
+              raf = undefined
+            })
+            return
+          }
+          setOpening(false)
+          return
+        }
+
+        if (prev && prev[1]) {
+          if (closing() && !timer) scheduleClose()
+          return
+        }
+
+        setDock(true)
+        setOpening(false)
+        setClosing(true)
+        scheduleClose()
+      },
+    ),
+  )
+
+  onCleanup(() => {
+    if (!timer) return
+    window.clearTimeout(timer)
+  })
+
+  onCleanup(() => {
+    if (!raf) return
+    cancelAnimationFrame(raf)
+  })
+
   return (
     <div
       ref={props.setPromptDockRef}
-      class="absolute inset-x-0 bottom-0 pt-12 pb-4 flex flex-col justify-center items-center z-50 bg-gradient-to-t from-background-stronger via-background-stronger to-transparent pointer-events-none"
+      data-component="session-prompt-dock"
+      class="shrink-0 w-full pb-4 flex flex-col justify-center items-center bg-background-stronger pointer-events-none"
     >
       <div
         classList={{
@@ -35,18 +114,8 @@ export function SessionPromptDock(props: {
       >
         <Show when={props.questionRequest()} keyed>
           {(req) => {
-            const subtitle = questionSubtitle(req.questions.length, (key) => props.t(key))
             return (
-              <div data-component="tool-part-wrapper" data-question="true" class="mb-3">
-                <BasicTool
-                  icon="bubble-5"
-                  locked
-                  defaultOpen
-                  trigger={{
-                    title: props.t("ui.tool.questions"),
-                    subtitle,
-                  }}
-                />
+              <div>
                 <QuestionDock request={req} />
               </div>
             )
@@ -122,12 +191,39 @@ export function SessionPromptDock(props: {
               </div>
             }
           >
-            <PromptInput
-              ref={props.inputRef}
-              newSessionWorktree={props.newSessionWorktree}
-              onNewSessionWorktreeReset={props.onNewSessionWorktreeReset}
-              onSubmit={props.onSubmit}
-            />
+            <Show when={dock()}>
+              <div
+                classList={{
+                  "transition-[max-height,opacity,transform] duration-[400ms] ease-out overflow-hidden": true,
+                  "max-h-[320px]": !closing(),
+                  "max-h-0 pointer-events-none": closing(),
+                  "opacity-0 translate-y-9": closing() || opening(),
+                  "opacity-100 translate-y-0": !closing() && !opening(),
+                }}
+              >
+                <SessionTodoDock
+                  todos={props.todos}
+                  title={props.t("session.todo.title")}
+                  collapseLabel={props.t("session.todo.collapse")}
+                  expandLabel={props.t("session.todo.expand")}
+                />
+              </div>
+            </Show>
+            <div
+              classList={{
+                "relative z-10": true,
+                "transition-[margin] duration-[400ms] ease-out": true,
+                "-mt-9": dock() && !closing(),
+                "mt-0": !dock() || closing(),
+              }}
+            >
+              <PromptInput
+                ref={props.inputRef}
+                newSessionWorktree={props.newSessionWorktree}
+                onNewSessionWorktreeReset={props.onNewSessionWorktreeReset}
+                onSubmit={props.onSubmit}
+              />
+            </div>
           </Show>
         </Show>
       </div>