feat: improve thumbnails, placement, and editor responsiveness (#258)

* wip: backport monorepo PRs 278 280 281 283 284

* refactor(editor): align floorplan panel with monorepo split version

packages/viewer/src/components/viewer/frame-limiter.tsx

@@ -0,0 +1,42 @@
+import { useThree } from '@react-three/fiber'
+import { useLayoutEffect } from 'react'
+
+type FrameLimiterProps = {
+  fps?: number
+}
+
+const FrameLimiter: React.FC<FrameLimiterProps> = ({ fps = 50 }) => {
+  const { advance, set, frameloop: initFrameloop } = useThree()
+
+  useLayoutEffect(() => {
+    let elapsed = 0
+    let then = 0
+    let i = 0
+    let raf: number | null = null
+    const interval = 1000 / fps
+
+    function tick(t: DOMHighResTimeStamp) {
+      raf = requestAnimationFrame(tick)
+      elapsed = t - then
+      if (elapsed > interval) {
+        advance(i)
+        i += elapsed / 1000 - (elapsed % interval) / 1000
+        then = t - (elapsed % interval)
+      }
+    }
+
+    set({ frameloop: 'never' })
+    raf = requestAnimationFrame(tick)
+
+    return () => {
+      if (raf) {
+        cancelAnimationFrame(raf)
+      }
+      set({ frameloop: initFrameloop })
+    }
+  }, [fps, advance, set, initFrameloop])
+
+  return null
+}
+
+export default FrameLimiter

packages/viewer/src/components/viewer/index.tsx

@@ -23,6 +23,7 @@ import { ScanSystem } from '../../systems/scan/scan-system'
 import { WallCutout } from '../../systems/wall/wall-cutout'
 import { ZoneSystem } from '../../systems/zone/zone-system'
 import { SceneRenderer } from '../renderers/scene-renderer'
+import FrameLimiter from './frame-limiter'
 import { Lights } from './lights'
 import { PerfMonitor } from './perf-monitor'
 import PostProcessing from './post-processing'
@@ -69,18 +70,27 @@ extend(THREE as any)
  *  - Driver crash or GPU reset
  *  - Browser security policy kills the context
  */
+type WebGPUDeviceLossInfo = {
+  reason?: string
+  message?: string
+}
+
+type WebGPUDeviceLike = {
+  lost: Promise<WebGPUDeviceLossInfo>
+}
+
 function GPUDeviceWatcher() {
   const gl = useThree((s) => s.gl)
 
   useEffect(() => {
     const backend = (gl as any).backend
-    const device: GPUDevice | undefined = backend?.device
+    const device = backend?.device as WebGPUDeviceLike | undefined
 
     if (!device) return
 
-    device.lost.then((info) => {
+    device.lost.then((info: WebGPUDeviceLossInfo) => {
       console.error(
-        `[viewer] WebGPU device lost: reason="${info.reason}", message="${info.message}". ` +
+        `[viewer] WebGPU device lost: reason="${info.reason ?? 'unknown'}", message="${info.message ?? ''}". ` +
           'The page must be reloaded to recover the GPU context.',
       )
     })
@@ -106,6 +116,7 @@ const Viewer: React.FC<ViewerProps> = ({
       camera={{ position: [50, 50, 50], fov: 50 }}
       className={`transition-colors duration-700 ${theme === 'dark' ? 'bg-[#1f2433]' : 'bg-[#fafafa]'}`}
       dpr={[1, 1.5]}
+      frameloop="never"
       gl={async (props) => {
         const renderer = new THREE.WebGPURenderer(props as any)
         renderer.toneMapping = THREE.ACESFilmicToneMapping
@@ -127,6 +138,7 @@ const Viewer: React.FC<ViewerProps> = ({
         enabled: true,
       }}
     >
+      <FrameLimiter fps={50} />
       {/* <AnimatedBackground isDark={theme === 'dark'} /> */}
       <ViewerCamera />
 

packages/viewer/src/components/viewer/post-processing.tsx

@@ -140,7 +140,7 @@ const PostProcessingPasses = () => {
     // loop fights the direct-render fallback path. Short-circuit here so
     // `useFrame` uses the direct `renderer.render(scene, camera)` path
     // exclusively and never attempts the TSL pipeline.
-    const hasWebGPU = typeof navigator !== 'undefined' && typeof navigator.gpu !== 'undefined'
+    const hasWebGPU = typeof navigator !== 'undefined' && 'gpu' in navigator
     if (!hasWebGPU) {
       console.warn(
         '[viewer] WebGPU unavailable — rendering without post-processing (SSGI, outlines, denoise).',