Align runtime and editor documentation with current implementation

docs/circuit-list-editor-interactions.md

@@ -161,6 +161,11 @@ across multiple sections is atomic and occupies one history step. Explicit
 renumbering uses a collision-safe persistent project command and one
 project-history step.
 
+The editor creates client-side UUIDs through `createClientId` in
+`src/frontend/utils/client-id.ts`. It uses `crypto.randomUUID()` when available
+and otherwise generates a UUID v4 with `crypto.getRandomValues()`, so insertion
+also works over plain HTTP from another machine in the LAN.
+
 Covered operations include:
 
 - insert/delete circuit