chore(cleanup): remove Copilot/instruction prompt files; fix Google Fonts URL in index.html; drop local apphost artifacts

Author: Maurice Peters

.apphost.pid

@@ -10,7 +10,7 @@
     <!-- Local Conduit CSS to avoid CORS errors -->
     <link rel="stylesheet" href="css/main.css" />
     <link href="https://code.ionicframework.com/ionicons/2.0.1/css/ionicons.min.css" rel="stylesheet" type="text/css" crossorigin="anonymous">
-    <link href="https:////fonts.googleapis.com/css?family=Titillium+Web:700|Source+Serif+Pro:400,700|Merriweather+Sans:400,700|Source+Sans+Pro:400,300,600,700,300italic,400italic,600italic,700italic" rel="stylesheet" type="text/css" crossorigin="anonymous">
+    <link href="https://fonts.googleapis.com/css?family=Titillium+Web:700|Source+Serif+Pro:400,700|Merriweather+Sans:400,700|Source+Sans+Pro:400,300,600,700,300italic,400italic,600italic,700italic" rel="stylesheet" type="text/css" crossorigin="anonymous">
     <script type='module' src="abies.js"></script>
 </head>