fix(tag-dropdown): exclude downstream blocks in loops and parallel siblings

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/hooks/use-accessible-reference-prefixes.ts

@@ -36,17 +36,20 @@ export function useAccessibleReferencePrefixes(blockId?: string | null): Set<str
     loopValues.forEach((loop) => {
       if (!loop?.nodes) return
       if (loop.nodes.includes(blockId)) {
-        accessibleIds.add(loop.id) // Add the loop block itself
-        loop.nodes.forEach((nodeId) => accessibleIds.add(nodeId))
+        accessibleIds.add(loop.id)
+        loop.nodes.forEach((nodeId) => {
+          if (ancestorIds.includes(nodeId)) {
+            accessibleIds.add(nodeId)
+          }
+        })
       }
     })
 
     const parallelValues = Object.values(parallels as Record<string, Parallel>)
     parallelValues.forEach((parallel) => {
       if (!parallel?.nodes) return
       if (parallel.nodes.includes(blockId)) {
-        accessibleIds.add(parallel.id) // Add the parallel block itself
-        parallel.nodes.forEach((nodeId) => accessibleIds.add(nodeId))
+        accessibleIds.add(parallel.id)
       }
     })