[Rush] Add rush-serve plugin dashboard UI and config updates

common/config/rush-plugins/rush-serve-plugin.json

@@ -3,5 +3,12 @@
   "phasedCommands": ["start"],
   "portParameterLongName": "--port",
   "buildStatusWebSocketPath": "/ws",
-  "logServePath": "/logs"
+  "logServePath": "/logs",
+  "globalRouting": [
+    {
+      "workspaceRelativeFolder": "rush-plugins/rush-serve-plugin/lib-commonjs/dashboard",
+      "servePath": "/dashboard",
+      "immutable": false
+    }
+  ]
 }

rush-plugins/rush-serve-plugin/README.md

@@ -22,6 +22,25 @@ This plugin also provides a web socket server that notifies clients of the build
 
 The recommended way to connect to the web socket is to serve a static HTML page from the serve plugin using the `globalRouting` configuration.
 
+This package includes a ready-made dashboard whose source lives under `src/dashboard/` and whose built assets are emitted to `lib-commonjs/dashboard/`. Because the HTML references sibling `dashboard.css` and `dashboard.ts` files, serve the built folder rather than a single file:
+
+```json
+{
+  "$schema": "https://developer.microsoft.com/json-schemas/rush/v5/rush-serve-plugin-options.schema.json",
+  "phasedCommands": ["start"],
+  "buildStatusWebSocketPath": "/ws",
+  "globalRouting": [
+    {
+      "workspaceRelativeFolder": "rush-plugins/rush-serve-plugin/lib-commonjs/dashboard",
+      "servePath": "/dashboard",
+      "immutable": false
+    }
+  ]
+}
+```
+
+Then open `https://localhost:<port>/dashboard/dashboard.html`.
+
 To use the socket:
 
 ```ts

rush-plugins/rush-serve-plugin/config/heft.json

@@ -20,6 +20,22 @@
               ]
             }
           }
+        },
+        "copy-dashboard-assets": {
+          "taskPlugin": {
+            "pluginPackage": "@rushstack/heft",
+            "pluginName": "copy-files-plugin",
+            "options": {
+              "copyOperations": [
+                {
+                  "sourcePath": "src/dashboard",
+                  "destinationFolders": ["lib-commonjs/dashboard", "lib-esm/dashboard"],
+                  "fileExtensions": [".html", ".css"],
+                  "hardlink": true
+                }
+              ]
+            }
+          }
         }
       }
     }

rush-plugins/rush-serve-plugin/eslint.config.js

@@ -9,6 +9,25 @@ module.exports = [
   ...nodeProfile,
   ...friendlyLocalsMixin,
   ...tsdocMixin,
+  {
+    files: ['src/dashboard/**/*.ts'],
+    languageOptions: {
+      sourceType: 'module',
+      globals: {
+        URL: 'readonly',
+        URLSearchParams: 'readonly',
+        WebSocket: 'readonly',
+        document: 'readonly',
+        history: 'readonly',
+        location: 'readonly',
+        localStorage: 'readonly',
+        navigator: 'readonly',
+        requestAnimationFrame: 'readonly',
+        self: 'readonly',
+        window: 'readonly'
+      }
+    }
+  },
   {
     files: ['**/*.ts', '**/*.tsx'],
     languageOptions: {