perf: diagnoistics improvements

toju-app/src/app/infrastructure/diagnostics/diagnostics.bootstrap.ts

@@ -7,6 +7,11 @@ import type { ElectronApi } from '../../core/platform/electron/electron-api.mode
 import { PerfDiagnosticsCollector, publishRendererDiagnosticsSample } from './diagnostics.collector';
 import type { PerfDiagEntry, PerfDiagReporter } from './diagnostics.models';
 
+declare global {
+  // Registered for synchronous main-process sampling at high-memory threshold.
+  var __collectPerfDiagSample: (() => PerfDiagEntry[]) | undefined;
+}
+
 const SAMPLE_INTERVAL_MS = 10_000;
 
 let started = false;
@@ -36,6 +41,22 @@ export async function bootstrapPerfDiagnostics(
 
   started = true;
 
+  let immediateSampleCollector: PerfDiagnosticsCollector | null = null;
+
+  runInInjectionContext(injector, () => {
+    immediateSampleCollector = inject(PerfDiagnosticsCollector);
+  });
+
+  globalThis.__collectPerfDiagSample = () => {
+    if (!immediateSampleCollector) {
+      return [];
+    }
+
+    const sample = immediateSampleCollector.collectSample();
+
+    return sample ? immediateSampleCollector.buildEntries(sample) : [];
+  };
+
   const reporter: PerfDiagReporter = {
     report: (entry: PerfDiagEntry) => reportSample(entry)
   };
@@ -92,5 +113,6 @@ function stopPerfDiagnosticsSampling(): void {
     sampleTimer = null;
   }
 
+  delete globalThis.__collectPerfDiagSample;
   started = false;
 }