reconcile boot and admin pages further

This adds some remaining parts of the boot page to
the admin panel, and then removes the boot page.

app/common/BaseAPI.ts

@@ -61,6 +61,18 @@ export class BaseAPI {
       'X-Requested-With': 'XMLHttpRequest',
       ...options.headers
     };
+    // If we are in the client, and have a boot key query parameter,
+    // pass it on as a header to make it available for authentication.
+    // This is a fallback mechanism if auth is broken to access the
+    // admin panel.
+    // TODO: should this be more selective?
+    if (typeof window !== 'undefined') {
+      const url = new URL(window.location.href);
+      const bootKey = url.searchParams.get('boot');
+      if (bootKey) {
+        this._headers['X-Boot-Key'] = bootKey;
+      }
+    }
     this._extraParameters = options.extraParameters;
   }
 

app/common/InstallAPI.ts

@@ -1,4 +1,5 @@
 import {BaseAPI, IOptions} from 'app/common/BaseAPI';
+import {BootProbeInfo, BootProbeResult} from 'app/common/BootProbe';
 import {InstallPrefs} from 'app/common/Install';
 import {TelemetryLevel} from 'app/common/Telemetry';
 import {addCurrentOrgToPath} from 'app/common/urlUtils';
@@ -56,6 +57,8 @@ export interface InstallAPI {
    * Returns information about latest version of Grist
    */
   checkUpdates(): Promise<LatestVersion>;
+  getChecks(): Promise<{probes: BootProbeInfo[]}>;
+  runCheck(id: string): Promise<BootProbeResult>;
 }
 
 export class InstallAPIImpl extends BaseAPI implements InstallAPI {
@@ -78,6 +81,14 @@ export class InstallAPIImpl extends BaseAPI implements InstallAPI {
     return this.requestJson(`${this._url}/api/install/updates`, {method: 'GET'});
   }
 
+  getChecks(): Promise<{probes: BootProbeInfo[]}> {
+    return this.requestJson(`${this._url}/api/probes`, {method: 'GET'});
+  }
+
+  runCheck(id: string): Promise<BootProbeResult> {
+    return this.requestJson(`${this._url}/api/probes/${id}`, {method: 'GET'});
+  }
+
   private get _url(): string {
     return addCurrentOrgToPath(this._homeUrl);
   }