Refactor infra tests, clean E2E step suites, and fix TS in tests

tests/smoke/helpers/ipc-verifier.ts

@@ -1,5 +1,10 @@
 import { ElectronApplication } from '@playwright/test';
 
+type IpcHandlerResult = {
+  error?: string;
+  [key: string]: unknown;
+};
+
 export interface IPCTestResult {
   channel: string;
   success: boolean;
@@ -41,10 +46,12 @@ export class IPCVerifier {
         });
       });
 
+      const typed: IpcHandlerResult = result as IpcHandlerResult;
+
       return {
         channel,
-        success: !result.error,
-        error: result.error,
+        success: !typed.error,
+        error: typed.error,
         duration: Date.now() - start,
       };
     } catch (error) {
@@ -79,10 +86,12 @@ export class IPCVerifier {
         });
       });
 
+      const typed: IpcHandlerResult = result as IpcHandlerResult;
+
       return {
         channel,
-        success: (result && !result.error) || typeof result === 'object',
-        error: result && result.error,
+        success: !typed.error,
+        error: typed.error,
         duration: Date.now() - start,
       };
     } catch (error) {
@@ -118,10 +127,12 @@ export class IPCVerifier {
         });
       });
 
+      const typed: IpcHandlerResult = result as IpcHandlerResult;
+
       return {
         channel,
-        success: !result.error,
-        error: result.error,
+        success: !typed.error,
+        error: typed.error,
         duration: Date.now() - start,
       };
     } catch (error) {