feat(FN-3196): sort done column by recency, add collapsible agent error dis

This merge consolidates several improvements across the dashboard, engine, and CLI: mobile nav now extends into iOS safe area, done columns sort by recency with merge-active state preserved, agent views gain collapsible error displays, per-project HeartbeatMonitor isolation is fixed for multi-projec

Fusion-Task-Id: FN-3196

packages/dashboard/app/components/MemoryView.tsx

@@ -113,7 +113,7 @@ function countTotalInsights(categories: ParsedInsightCategory[]): number {
 function getBackendDisplayName(backend: string): string {
   switch (backend) {
     case "file":
-      return "File (.fusion/memory/)";
+      return "File (.fusion/memory/, agent/<agent-name>/memory/)";
     case "readonly":
       return "Read-Only";
     case "qmd":