Implement critical editor override state

docs/player_gm_ux_redesign_plan.md

@@ -551,6 +551,17 @@ Acceptance criteria:
 
 ### Phase 3: Generated versus overridden state model
 
+Status:
+
+- implemented in the web app on March 15, 2026
+
+Implemented model:
+
+- result-level override flags separate generated description and collection state from manual edits
+- effect rows and condition rows carry explicit origin keys plus override markers
+- re-parse now merges generated parser output with the current override state instead of replacing the whole editor payload
+- saved editor state is persisted so later edit sessions keep the same generated-versus-overridden boundaries
+
 Scope:
 
 - explicitly track which values are parser-generated and which values were manually overridden