Promote Level 19 overlay system to baseline.

PR Details:
- Marks completion of Level 19
- Locks validated state

Author: DavidQ

docs/dev/CODEX_COMMANDS.md

@@ -1,10 +1,7 @@
 MODEL: GPT-5.4
-REASONING: medium
+REASONING: low
 
 COMMAND:
-Execute full validation of overlay system:
-- Validate all integrated subsystems
-- Confirm no regressions
-- Update roadmap status only
-
+Promote Level 19 overlay system to baseline.
+Update roadmap status only.
 Package ZIP to <project folder>/tmp/

docs/dev/COMMIT_COMMENT.txt

@@ -1,5 +1,5 @@
-Finalize overlay system validation.
+Promote Level 19 overlay system to baseline.
 
 PR Details:
-- Full integration validation across all overlay features
-- Marks Level 19 readiness
+- Marks completion of Level 19
+- Locks validated state

docs/dev/reports/validation_checklist.txt

@@ -1,4 +1,3 @@
-[ ] All subsystems validated
-[ ] No regressions found
-[ ] Gameplay unaffected
-[ ] Roadmap status updated
+[ ] System stable
+[ ] No regressions
+[ ] Roadmap updated

docs/dev/roadmaps/MASTER_ROADMAP_HIGH_LEVEL.md

@@ -801,7 +801,7 @@
 - [ ] ensure all systems expose debug data
 - [x] ensure providers are complete and consistent
 - [x] validate debug panels across systems
-- [ ] confirm production-safe debug toggling
+- [x] confirm production-safe debug toggling
 
 ### Track E — Toolchain Validation
 - [ ] verify tools integrate cleanly with engine

docs/pr/BUILD_PR.md

@@ -1,24 +1,19 @@
-# BUILD_PR_LEVEL_19_9_OVERLAY_FINAL_INTEGRATION_VALIDATION
+# BUILD_PR_LEVEL_19_10_OVERLAY_PROMOTE_BASELINE
 
 ## Purpose
-Perform full validation of overlay system integration across gameplay, input, layout, and composition.
+Promote validated Level 19 overlay system to baseline.
 
 ## Roadmap Improvement
-Completes Level 19 with a full-system validation milestone.
+Marks Level 19 complete and production-ready.
 
 ## Scope
-- Validate all overlay subsystems together
-- Confirm no regressions across input, rendering, layout, and composition
-- Final readiness check for Level 19
+- Promote current implementation as baseline
+- Ensure no regression from validation state
 
 ## Test Steps
-1. Run gameplay with multiple overlays
-2. Cycle overlays, toggle visibility
-3. Validate layout, priority, readability
-4. Stress test inputs
-5. Confirm no regressions
+1. Run gameplay with overlays
+2. Confirm all systems stable
 
 ## Expected
-- System stable
-- No conflicts
-- Ready for promotion
+- Stable baseline
+- Ready for next level