fix(viz): per-panel picker finds feedBackViz_* factories (3D highway missing in split screen)

[topkoa]

What

In split screen, the per-panel viz picker stopped offering migrated visualizations (the 3D highway, etc.). The main-player picker was fine.

Root cause

The viz-factory global was renamed window.slopsmithViz_<id> → window.feedBackViz_<id> in the feedBack rename. Core's main-player picker (static/app.js) and highway_3d both register/look up under the new name. Splitscreen was the one laggard — it still gated every per-panel viz option on window['slopsmithViz_' + id], which is now always undefined, so no migrated viz showed up in the split picker.

Fix

Add a dual-prefix helper and route every lookup through it:

const VIZ_FACTORY_PREFIXES = ['feedBackViz_', 'slopsmithViz_'];
function vizFactory(id) { /* feedBackViz_ first, then legacy slopsmithViz_ */ }
function hasVizFactory(id) { return typeof vizFactory(id) === 'function'; }

• Prefers the new feedBackViz_<id>, falls back to the legacy slopsmithViz_<id> (core still keeps it as a compat shim for third-party viz) — so this works whether a viz migrated or not.
• Routed all ~10 sites: _rescanVizPluginsFromWindow (window-scan), _startVizFactoryWatch seed/tick/all-present, populateSelect filter + watch trigger, getPanelControlsFor (panelControls override), and the three factory-instantiation paths (enterVizMode, viz restore in initPanel, and the in-place viz switch in select.onchange).
• Version bump 1.10.6 → 1.10.7 so installs cache-bust the updated screen.js (and the Plugin Manager sees the update).

Scope / notes

• Behavior-only; no API or layout change. A few inline comments still narrate the old slopsmithViz_ name — left as-is to keep the diff focused; the helper documents the rename.
• node --check screen.js passes.

Test

Split screen → per-panel picker now lists the 3D highway (and other migrated viz), selecting it installs the renderer, and a saved 3D-viz panel restores on reload.

[Copilot]

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