fix trace npe. fix /boot redirect after install

src/kiri/mode/cam/cl-trace.js

@@ -144,7 +144,7 @@ export function traceHoverUp(int, ev) {
 
 export function traceToggle(obj, skip) {
     let material = obj.material[0] || obj.material;
-    if (!material) return;
+    if (!(material && obj.trace)) return;
     let { color, colorSave } = material;
     let { widget, poly } = obj.trace;
     let areas = env.poppedRec.areas;

web/boot/service.js

@@ -143,7 +143,7 @@ async function _fetch(e) {
 
     if (url.pathname.endsWith("/")) {
         return e.respondWith(redirectOr404(appendURL(url, 'index.html').pathname));
-    } else if (url.pathname.indexOf(".") < 0) {
+    } else if (url.pathname.indexOf(".") < 0 || url.pathname.endsWith("/boot")) {
         return e.respondWith(redirectOr404(appendURL(url, '/index.html').pathname));
     } else {
         e.respondWith(fromCacheOrNetwork(request));

web/kiri/manifest.json

@@ -2,7 +2,7 @@
     "name": "Kiri:Moto 4.5.0",
     "short_name": "Kiri:Moto",
     "description": "Slicer for 3D printers, CNC mills, laser cutters and more",
-    "start_url": "/boot/",
+    "start_url": "/boot/index.html",
     "id": "/kiri/",
     "display": "standalone",
     "theme_color": "#7e99b7",