refactor(overlay): split bounds ownership by layer for TASK-20.1

backlog/config.yml

@@ -6,7 +6,7 @@ milestones: []
 date_format: yyyy-mm-dd
 max_column_width: 20
 default_editor: "nvim"
-auto_open_browser: true
+auto_open_browser: false
 default_port: 6420
 remote_operations: true
 auto_commit: false

backlog/tasks/task-20.1 - Refactor-overlay-runtime-to-use-per-layer-window-bounds-ownership.md

@@ -1,10 +1,10 @@
 ---
 id: TASK-20.1
 title: Refactor overlay runtime to use per-layer window bounds ownership
-status: To Do
+status: Done
 assignee: []
 created_date: '2026-02-12 08:47'
-updated_date: '2026-02-12 09:42'
+updated_date: '2026-02-12 10:12'
 labels: []
 dependencies: []
 parent_task_id: TASK-20
@@ -19,8 +19,24 @@ Refactor overlay runtime so each overlay layer owns and applies its bounds indep
 
 ## Acceptance Criteria
 <!-- AC:BEGIN -->
-- [ ] #1 `updateOverlayBoundsService` no longer applies the same bounds to every overlay window by default.
-- [ ] #2 Main runtime/manager exposes per-layer bounds update paths for visible and invisible overlays.
-- [ ] #3 Window tracker updates feed shared origin data; each layer applies its own computed bounds.
-- [ ] #4 Single-layer behavior (visible-only or invisible-only) remains unchanged from user perspective.
+- [x] #1 `updateOverlayBoundsService` no longer applies the same bounds to every overlay window by default.
+- [x] #2 Main runtime/manager exposes per-layer bounds update paths for visible and invisible overlays.
+- [x] #3 Window tracker updates feed shared origin data; each layer applies its own computed bounds.
+- [x] #4 Single-layer behavior (visible-only or invisible-only) remains unchanged from user perspective.
 <!-- AC:END -->
+
+## Implementation Notes
+
+<!-- SECTION:NOTES:BEGIN -->
+Started implementation for per-layer overlay bounds ownership refactor.
+
+Implemented per-layer bounds ownership path: visible and invisible layers now update bounds independently through overlay manager/runtime plumbing, while preserving existing geometry source behavior.
+
+Replaced shared all-window bounds application with per-window bound application service and layer-specific runtime calls from visibility/tracker flows.
+<!-- SECTION:NOTES:END -->
+
+## Final Summary
+
+<!-- SECTION:FINAL_SUMMARY:BEGIN -->
+Refactored overlay bounds ownership to per-layer update paths. Tracker geometry remains shared input, but visible/invisible windows apply bounds independently via explicit layer routes. Existing single-layer UX behavior is preserved.
+<!-- SECTION:FINAL_SUMMARY:END -->