Render thread pages on the server

src/app.d.ts

@@ -1,6 +1,7 @@
 // See https://svelte.dev/docs/kit/types#app.d.ts
 // for information about these interfaces
 import type { ForumShell, Profiles } from "$lib/forum/snapshot";
+import type { ThreadDetail } from "$lib/forum/thread";
 
 declare global {
   namespace App {
@@ -10,6 +11,7 @@ declare global {
     interface PageData {
       shell?: ForumShell | null;
       profiles?: Profiles | null;
+      thread?: ThreadDetail | null;
     }
     // interface PageState {}
     // interface Platform {}