refactor(render): compose render frame orchestrator

Move the accepted draw transaction and failure recovery behind typed frame-phase owners so GameWindow only supplies immutable frame input. Preserve retail draw order, make ImGui/bootstrap shutdown ownership explicit, and restore exact text-render GL state on failures.\n\nCo-authored-by: Codex <codex@openai.com>

docs/plans/2026-07-22-gamewindow-slice-7-render-frame-orchestration.md

@@ -28,7 +28,7 @@ port, or resource-lifetime redesign.
   `RetailPViewPassExecutor` and data-only inputs.
 - [x] F — extract `WorldSceneRenderer`, including both shared-alpha scopes,
   PView/fallback world branches, particles, debug world draw, and completion.
-- [ ] G — compose `RenderFrameOrchestrator`, cut `GameWindow.OnRender` to one
+- [x] G — compose `RenderFrameOrchestrator`, cut `GameWindow.OnRender` to one
   handoff, and delete obsolete frame bodies, fields, helpers, and callbacks.
 - [ ] H — corrected-diff reviews, full Release suite, connected lifecycle and
   soak gates, framebuffer comparison, documentation, memory, and metrics.
@@ -231,12 +231,15 @@ contract requires separate approval and evidence.
 
 ### 4.2 Borrowed resources and shutdown
 
-Slice 7 collaborators borrow the already-created GL/render owners. They do not
-dispose them. The existing retryable shutdown transaction keeps its proven
-dependency order: wait for submitted work; withdraw UI/render publications;
-release textures and mesh owners; then dispose GL backing stores, with
-`GpuFrameFlightController` last among render resources. Slice 8 may group
-construction/disposal after the render cutover is stable.
+The frame orchestrator and phase owners borrow the already-created GL/render
+owners and do not dispose them. The developer-tools backend is itself the
+canonical owner of its ImGui bootstrap and disposes that bootstrap when the
+existing retryable shutdown transaction retires the backend; the frame
+presenter only borrows it. Shutdown keeps its proven dependency order: wait for
+submitted work; withdraw UI/render publications; release textures and mesh
+owners; then dispose GL backing stores, with `GpuFrameFlightController` last
+among render resources. Slice 8 may group construction/disposal after the
+render cutover is stable.
 
 `DisplayFramePacingController` is the focused shared owner for requested VSync,
 live display preview, monitor/window callbacks, and the separate
@@ -354,7 +357,8 @@ Completed 2026-07-22. Paperdoll clone/re-dress/pose/FBO work now belongs to
 `PaperdollFramePresenter`; retained surfaces are narrow and optional, while
 live identity and DAT pose application resolve through focused adapters.
 `DevToolsFramePresenter` owns the ImGui frame, menus, panels, layout, and input
-actions without taking shutdown ownership of the borrowed bootstrap.
+actions while borrowing the bootstrap; `ImGuiDevToolsFrameBackend` explicitly
+owns and disposes that bootstrap at shutdown.
 `WorldRenderDiagnostics`, `DebugVmRenderFactsPublisher`, and
 `RenderFrameDiagnosticsController` own the former render probes, debug facts,
 title/resource cadence, and public snapshot. The production handoff now reports
@@ -471,12 +475,29 @@ corrected-diff reviews are clean.
 
 - compose concrete resource, world, private-presentation, and diagnostic owners;
 - replace `OnRender` with one `RenderFrameOrchestrator.Render` handoff;
-- remove obsolete fields/helpers/callbacks and prove the transitive render graph
-  has no substantial path back to `GameWindow`;
-- preserve the existing shutdown resource list without transferring disposal;
+- remove obsolete fields/helpers/callbacks; prove immediate frame owners retain
+  no direct `GameWindow`/anonymous-delegate back-reference, and document rather
+  than deny recursive paths through borrowed canonical UI/input owners;
+- preserve the existing shutdown dependency order while making the
+  developer-tools backend's pre-existing bootstrap ownership explicit;
 - measure line/field/method counts. Ownership decides completion; the expected
   signal is roughly 5,000–5,500 lines before Slice 8 composition cleanup.
 
+Completed 2026-07-22. `GameWindow.OnRender` now creates one value-only
+`RenderFrameInput` and hands the complete frame to `RenderFrameOrchestrator`.
+Focused preparation, world-scene, private-presentation, and diagnostic owners
+preserve the accepted resource → ImGui begin → weather → world → portal →
+paperdoll → retained UI → ImGui submit → screenshot → diagnostics → GPU close
+order. Recovery now closes an active ImGui frame through the owning Silk
+controller and restores the exact text-render GL state after success or
+failure. Screenshot dimensions travel in the frame input rather than through a
+window callback, and immediate frame owners have no direct `GameWindow` or
+anonymous-delegate back-reference. `GameWindow.cs` is 4,666 raw lines / 196
+fields / 70 methods: 11,057 lines (70.3%) below the 15,723-line campaign
+baseline. The Release build and complete suite pass (7,341 passed / 5 skipped),
+and retail-conformance, architecture, and adversarial corrected-diff reviews
+are clean.
+
 ### H — release and connected gates
 
 After three clean corrected-diff reviews: