feat(FN-4015): classify and recover from stale module-resolution incidents

Merges FN-4015 to add stale module-resolution incident detection and self-healing in the engine (`transient-error-detector.ts`, `self-healing.ts`) with mobile regression coverage for the shared `AgentErrorDetailsModal` layout.

Fusion-Task-Id: FN-4015

packages/dashboard/app/components/AgentErrorDetailsModal.css

@@ -31,6 +31,7 @@
   flex: 1 1 auto;
   min-height: 0;
   overflow: hidden;
+  display: flex;
 }
 
 .agent-error-modal__error {
@@ -52,15 +53,14 @@
   .agent-error-modal {
     width: 100%;
     max-width: 100%;
-    height: 100vh;
-    height: 100dvh;
-    max-height: 100vh;
-    max-height: 100dvh;
+    height: 100%;
+    max-height: 100%;
     flex: 1 1 auto;
+    min-height: 0;
   }
 
   .agent-error-modal__content {
-    display: flex;
+    flex: 1 1 auto;
   }
 
   .agent-error-modal__error {
@@ -69,5 +69,6 @@
     min-height: 0;
     width: 100%;
     -webkit-overflow-scrolling: touch;
+    overscroll-behavior: contain;
   }
 }