fix: address PR #644 review comments

- Add 'waiting' status to computeHealthStatus for projects with pending
  features but no active execution (fixes status never being emitted)
- Fix undefined RunningAgentInfo type to use local RunningAgent interface

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/server/src/routes/projects/routes/overview.ts

@@ -90,6 +90,11 @@ function computeHealthStatus(
     return 'active';
   }
 
+  // Pending work but no active execution
+  if (featureCounts.pending > 0) {
+    return 'waiting';
+  }
+
   // If all features are completed or verified
   if (totalFeatures > 0 && featureCounts.pending === 0 && featureCounts.running === 0) {
     return 'completed';