From e8eebe49407de8947bf509d5cf04d9080ee4edf7 Mon Sep 17 00:00:00 2001
From: "Somhairle H. Marisol" <muqiu-han@outlook.com>
Date: Mon, 21 Sep 2026 07:02:13 +0800
Subject: Real historical replay: timeline pins load run's own checkpoint GLBs
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- renderTimeline rebuilds #timeline-track after each snapshot and wires
  click-to-pin on completed checkpoints (kept placeholder nodes otherwise)
- selection loads the pinned run's own steps/<n>-*.glb (generation/
  ownership guards apply), pins survive live snapshots, 跟随最新 restores
  live scope, replay pauses/scrubs through 已完成 versions
- placeholder fallback now clearly labeled (占位…) only before any run
- acceptance: historical_replay_regression (9 checks) pins mid-run,
  asserts no auto-follow strays, late-older-response precedence, served
  checkpoint sha256 vs CLI reference, and viewport geometry change
- fix: timeline-track id missing in index.html crashed renderTimeline
  (null firstChild), leaving static placeholder nodes non-clickable
- driver: 71/71 checks, zero console/page errors
---
 src/SomhairlesDream.Frontend/Bindings.fs | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/SomhairlesDream.Frontend/Bindings.fs')

diff --git a/src/SomhairlesDream.Frontend/Bindings.fs b/src/SomhairlesDream.Frontend/Bindings.fs
index 2822e33..e7c567d 100644
--- a/src/SomhairlesDream.Frontend/Bindings.fs
+++ b/src/SomhairlesDream.Frontend/Bindings.fs
@@ -103,6 +103,9 @@ let createVector3 () : ThreeVector = jsNative
 [<Emit("window.SOMHAIRLES_VIEWER = { camera: $0, scene: $1, group: $2, canvas: $3 }")>]
 let exposeViewerDebug (camera: ThreeCamera) (scene: ThreeNode) (group: ThreeNode) (canvas: obj) : unit = jsNative
 
+[<Emit("var child; while ((child = $0.firstChild)) { $0.removeChild(child); }")>]
+let clearChildren (node: obj) : unit = jsNative
+
 [<Emit("new THREE.WebGLRenderer($0)")>]
 let createRenderer (options: obj) : ThreeRenderer = jsNative
 
-- 
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