Update to latest Svelte Beta

Resolves sveltejs/kit#5952

frontend/package.json

@@ -12,15 +12,14 @@
     "check:watch": "svelte-check --tsconfig ./tsconfig.json --watch",
     "lint": "prettier --check --plugin-search-dir=. . && eslint .",
     "format": "prettier --write --plugin-search-dir=. .",
-    "prebuild": "cd ../audio-worklet && npm run build",
     "postinstall": "cd ../audio-worklet && npm install",
     "postci": "cd ../audio-worklet && npm ci",
     "postlint": "cd ../audio-worklet && npm run lint",
     "prelint": "npm run format"
   },
   "devDependencies": {
-    "@sveltejs/adapter-static": "^1.0.0-next.39",
-    "@sveltejs/kit": "1.0.0-next.426",
+    "@sveltejs/adapter-static": "^1.0.0-next.41",
+    "@sveltejs/kit": "1.0.0-next.461",
     "@types/lodash": "^4.14.178",
     "@types/webmidi": "^2.0.6",
     "@typescript-eslint/eslint-plugin": "^5.27.0",
@@ -37,7 +36,7 @@
     "svelte-preprocess": "^4.10.6",
     "tslib": "^2.3.1",
     "typescript": "^4.7.4",
-    "vite": "^3.0.0"
+    "vite": "^3.1.0-beta.1"
   },
   "dependencies": {
     "@crikey/stores-base": "^0.0.13",

frontend/src/hooks.ts

@@ -1,6 +1,6 @@
 import type { Handle } from '@sveltejs/kit'
 import config from '../vite.config'
-import { dev } from '$app/env'
+import { dev } from '$app/environment'
 
 /**
  * https://gist.github.com/michaelwooley/3d35e552fbaeaa44801f93228c486a8a
@@ -39,7 +39,7 @@ const updateResponseHeadersInDevFactory = (): ((r: Response) => void) => {
 const updateResponseHeadersInDev = updateResponseHeadersInDevFactory()
 
 export const handle: Handle = async ({ event, resolve }) => {
-  const response = await resolve(event, { ssr: false })
+  const response = await resolve(event)
 
   updateResponseHeadersInDev(response)
 

frontend/src/routes/workspace/[slug]/+page.ts

@@ -7,9 +7,6 @@ export const load: PageLoad = async event => {
   if (id === 'new') {
     const new_id = await new_workspace()
 
-    // > There is a known bug with `redirect`: it will currently fail during client-side navigation, due to [#5952](https://github.com/sveltejs/kit/issues/5952)
-    // At least in dev mode
-    console.log(`/workspace/${new_id}`)
     throw redirect(307, `/workspace/${new_id}`)
   } else {
     // Try load the workspace from localstorage