fix(typescript): tighten TypeScript null safety and error handling across backend and ops UI

ts_web/elements/ops-view-emails.ts

@@ -83,13 +83,13 @@ export class OpsViewEmails extends DeesElement {
   private async handleEmailClick(e: CustomEvent<interfaces.requests.IEmail>) {
     const emailSummary = e.detail;
     try {
-      const context = appstate.loginStatePart.getState();
+      const context = appstate.loginStatePart.getState()!;
       const request = new plugins.domtools.plugins.typedrequest.TypedRequest<
         interfaces.requests.IReq_GetEmailDetail
       >('/typedrequest', 'getEmailDetail');
 
       const response = await request.fire({
-        identity: context.identity,
+        identity: context.identity!,
         emailId: emailSummary.id,
       });