feat(FN-3895): add event-driven unblock for scheduler startup recovery when

Adds an event-driven unblock path that automatically releases agents when their blocked-by dependencies complete, including startup recovery logic for any tasks still blocked at engine initialization; covered by scheduler and self-healing test suites with a minor CSS fix for the compact mobile impor

Fusion-Task-Id: FN-3895

packages/dashboard/app/components/AgentsView.css

@@ -1306,8 +1306,9 @@
     justify-content: center;
   }
 
-  /* New Agent: icon-only on mobile, sized to match view-toggle buttons.
-     Text is visually hidden via font-size: 0 (the SVG icon keeps its size). */
+  /* Import + New Agent: icon-only on mobile, sized to match view-toggle
+     buttons so the no-wrap action row never overflows (FN-3895 follow-up). */
+  .agents-view-primary-actions .agent-import-trigger,
   .agents-view-primary-actions .btn-task-create {
     width: calc(var(--space-lg) * 2 + var(--space-xs));
     height: calc(var(--space-lg) * 2 + var(--space-xs));

packages/dashboard/app/components/AgentsView.tsx

@@ -800,7 +800,7 @@ export function AgentsView({ addToast, projectId, onOpenTaskLogs, agentOnboardin
               <RefreshCw size={16} className={isLoading ? "spin" : undefined} />
             </button>
             <button
-              className="btn btn-sm"
+              className="btn btn-sm agent-import-trigger"
               onClick={() => {
                 setIsImporting(true);
                 setIsControlsPanelOpen(false);