Implement the catwalk visualization

[williamthorsen]

Spike #162 created a detailed prototype for a "catwalk"-style visualization of orchestrated runs.

This ticket captures the overall goal of implementing the same functionality in the factory workspace.

Design document: docs/plans/2026-03-04-catwalk-visualization-design.md

Sub-issues

Milestone 1: Static layout + orchestrator positioning

• Scaffold catwalk visualization with CatwalkCanvas and tab switcher #176 — Scaffold catwalk visualization with CatwalkCanvas and tab switcher
• Add shared artifact color constants and catwalk dimension/timing constants #177 — Add shared artifact color constants and catwalk dimension/timing constants
• Implement catwalk layout engine #178 — Implement catwalk layout engine
• Define CatwalkSceneConfig types and implement run-to-catwalk mapper #179 — Define CatwalkSceneConfig types and implement run-to-catwalk mapper
• Implement static catwalk actors #180 — Implement static catwalk actors
• Implement CatwalkScene with config-driven actor management #181 — Implement CatwalkScene with config-driven actor management

Milestone 2: Agent states + basic artifacts + orchestrator movement

• Implement catwalk config differ #182 — Implement catwalk config differ
• Add animated state transitions to catwalk actors #183 — Add animated state transitions to catwalk actors

Milestone 3: Chute animations, carried artifacts, code badge

• Catwalk milestone 3: Chute animations, carried artifacts, code badge #184 — Tracking issue (to be broken into sub-issues)

Milestone 4: Verdicts, HUD, demo mode, polish

• Catwalk milestone 4: Verdicts, HUD, demo mode, polish #185 — Tracking issue (to be broken into sub-issues)

Supporting work

• Remove Factory visualization code #186 — Remove Factory visualization code
• Move Flow diagram to src/client/visualizations/flow/ #187 — Move Flow diagram to src/client/visualizations/flow/