docs: fix trailing slash issue on demo site

Author: hperrin

packages/site/package.json

@@ -5,7 +5,8 @@
   "type": "module",
   "scripts": {
     "dev": "svelte-kit dev",
-    "build": "svelte-kit build",
+    "build": "svelte-kit build && npm run rename-md",
+    "rename-md": "cd build && mv INSTALL.mdindex.html INSTALL.md.html && mv MIGRATING.mdindex.html MIGRATING.md.html && mv REPL.mdindex.html REPL.md.html && mv SVELTEKIT.mdindex.html SVELTEKIT.md.html && mv THEMING.mdindex.html THEMING.md.html && cd ..",
     "package": "svelte-kit package",
     "preview": "svelte-kit preview",
     "prepare": "svelte-kit sync && npm run smui-theme-light && npm run smui-theme-dark && npm run site-light && npm run site-dark",

packages/site/src/routes/__layout.svelte

@@ -226,22 +226,22 @@
   )[] = [
     {
       name: 'Installation',
-      route: '/INSTALL.md/',
+      route: '/INSTALL.md',
       indent: 0,
     },
     {
       name: 'SvelteKit',
-      route: '/SVELTEKIT.md/',
+      route: '/SVELTEKIT.md',
       indent: 1,
     },
     {
       name: 'Theming',
-      route: '/THEMING.md/',
+      route: '/THEMING.md',
       indent: 0,
     },
     {
       name: 'Migrating',
-      route: '/MIGRATING.md/',
+      route: '/MIGRATING.md',
       indent: 0,
     },
     {

packages/site/svelte.config.js

@@ -37,6 +37,8 @@ const config = {
       default: true,
     },
 
+    trailingSlash: 'always',
+
     vite: {
       ssr: {
         noExternal: ['tinygesture'],