perf: Add ram metric

electron/app-metrics.ts

@@ -0,0 +1,23 @@
+import { app } from 'electron';
+
+export interface AppMetricsProcessSnapshot {
+  pid: number;
+  type: string;
+  workingSetKb: number | null;
+}
+
+export interface AppMetricsSnapshot {
+  collectedAt: number;
+  processes: AppMetricsProcessSnapshot[];
+}
+
+export function collectAppMetricsSnapshot(): AppMetricsSnapshot {
+  return {
+    collectedAt: Date.now(),
+    processes: app.getAppMetrics().map((metric) => ({
+      pid: metric.pid,
+      type: metric.type,
+      workingSetKb: metric.memory?.workingSetSize ?? null
+    }))
+  };
+}