Add 3D camera timeline track + cap-demo CLI skill

[richiemcilroy]

Summary

• Adds a "3d" studio editor track: schema (Camera3DSegment/Camera3DTracks), a hand-rolled homography warp + screen-space CoC blur renderer layer, track-heal rescale support, and the desktop UI (track lane, sidebar panel with templates/scenes/keyframe editing).
• Embeds a new cap-demo companion skill into the cap CLI's agent installer (scouts a URL, records it, and treats the footage with the 3D camera), with a build-time guard against accidentally baking node_modules into the binary.

Test plan

• cargo check clean across cap-project, cap-rendering, cap-recording, cap-editor, cap-export, and cap (CLI)
• apps/desktop vitest: 154/154 passing (63 new in three-d.test.ts)
• pnpm tsc -b apps/desktop/tsconfig.json clean

Greptile Summary

This PR adds a 3D camera timeline, rendering and editing support, recording track-healing integration, and an installable cap-demo CLI skill.

• Adds the 3D camera project schema, GPU renderer, shaders, timeline controls, templates, and keyframe editing.
• Integrates 3D tracks with desktop import/export, playback, recording recovery, and track rescaling.
• Embeds the cap-demo skill and assets into the CLI with an installation path and build-time dependency guard.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
crates/project/src/configuration.rs	Adds the serialized 3D camera segment, pose, blur, and keyframe-track configuration model.
crates/rendering/src/layers/camera3d.rs	Implements the GPU layer that applies the 3D camera transform and screen-space blur.
apps/desktop/src/routes/editor/three-d.ts	Adds frontend 3D segment manipulation, templates, scenes, and keyframe helpers with focused tests.
apps/cli/skill/cap-demo/lib/scout-shoot.mjs	Implements the browser scouting and detached recording stage with project-qualified recording shutdown.
apps/cli/skill/cap-demo/lib/treat.py	Converts recorded events into bounded timeline cuts, 3D camera shots, cursor data, music, and an exported demo.
apps/cli/src/agents.rs	Extends agent installation to deploy the embedded cap-demo companion skill.
crates/recording/src/track_heal.rs	Extends timeline healing and rescaling to preserve 3D camera segments and their keyframes.

_{Reviews (3): Last reviewed commit: "fix: keep cap-demo second shot boundary ..." | Re-trigger Greptile}

Context used (3)

• Context used - AGENTS.md (source)
• Knowledge Base — Cap CLI (apps/cli)
• Knowledge Base — Agent API & CLI Agent Login (apps/web + apps/cli)

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Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	npm/​playwright-core@​1.62.1
	cargo/​include_dir@​0.7.4

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[richiemcilroy]

hey @greptileai, please re-review the PR

[richiemcilroy]

hey @greptileai, please re-review the PR