fix(renderer): deferred path honors the render-target override

[proggeramlug]

The override set by begin_texture_mode was only consulted by the simple 2D end_frame — end_frame_with_scene (every 3D app) acquired and presented the surface unconditionally, so render-to-texture has silently no-oped for 3D content since Q1. Now the deferred frame's final passes write the RT view (all depth-less — no attachment-size hazards), nothing presents, and the screenshot branch defers to the next real frame.

Proven live: the editor's model thumbnails render into 128px targets and draw through drawTexturePro — screenshot-verified, the first successful RT sampling in the engine. Follow-up tracked: a native golden test for the RT round-trip.

https://claude.ai/code/session_01PmL9WgNMkAgvpYSHEZga8K

Summary by CodeRabbit

• Bug Fixes
  • Improved rendering when drawing to custom textures by correctly using the configured color and depth targets.
  • Prevented unnecessary screen presentation and screenshot readback during off-screen rendering.
  • Preserved normal display output when rendering directly to the screen.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 7bb8e6ac-ee01-4d39-b87f-f36953a8e59a

📥 Commits

Reviewing files that changed from the base of the PR and between 64cfec3 and 0e2c981.

📒 Files selected for processing (1)

• native/shared/src/renderer/mod.rs

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📝 Walkthrough

Walkthrough

end_frame_with_scene now renders directly to active render-target overrides, preserves those views, suppresses swapchain-dependent screenshot readback, and presents frames only when a swapchain output was acquired.

Changes

Render-target output handling

Layer / File(s)	Summary
Render-target selection native/shared/src/renderer/mod.rs	end_frame_with_scene detects active render-target overrides, skips swapchain acquisition, and selects the override color and depth views.
Output-dependent frame completion native/shared/src/renderer/mod.rs	Screenshot readback is disabled for render-target frames, and present_frame runs only when swapchain output exists.

Estimated code review effort: 3 (Moderate) | ~20 minutes

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/render-to-texture

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