refactor(app): compose live presentation startup

docs/ISSUES.md

@@ -26,15 +26,14 @@ What does NOT go here:
 
 ## Current queue — 2026-07-22
 
-- **Active structural work:** `GameWindow` decomposition. Slices 1–7 are
-  complete; Slice 8 checkpoints A–G now own native callbacks, live-session
-  composition, world-environment state, reversible device input/raw pointer,
-  physical framebuffer publication, gameplay action priority, typed commands,
-  the retained-root item-drop edge, and two-phase runtime settings outside the
-  shell.
+- **Active structural work:** `GameWindow` decomposition. Slices 1–7 and Slice
+  8 checkpoints A–H are complete; I.1–I.6 now own the executable ordered
+  startup path through retained UI and live presentation, including the
+  canonical runtime/world, selection/radar, landblock publishers, and
+  portal/sky/particle resources.
   `GameWindow.OnUpdate` and `GameWindow.OnRender` are typed orchestration
-  handoffs and the class is 3,663 lines / 162 fields / 37 methods. Remaining
-  Slice 8 resource/composition/shutdown
+  handoffs and the class is 2,840 raw lines. I.7–I.9 plus the remaining
+  shutdown/closeout
   cleanup is active in
   [`docs/architecture/code-structure.md`](architecture/code-structure.md).
   This is the behavior-preserving prerequisite before new M4 feature bodies.