Manage Language Models: visibility-toggle focus loss no longer reproducible

[Copilot]

The reported bug requires a Show/Hide (eye icon) action on each model row in the Manage Language Models editor — pressing Enter on a model toggled its visibility and dropped focus to the top of the list.

Investigation

• That action and the entire model.visible plumbing were removed from chatModelsWidget.ts / chatModelsViewModel.ts / languageModels.ts in commit 40e150fc96a ("Remove model picker visibility overrides").
• In current main, table.onDidOpen only toggles collapse for vendor/group entries; pressing Enter on a model row is a no-op, so no splice/refocus occurs.
• No remaining surface in the manage-models editor changes per-model visibility, so the repro is dead.

Changes

• None. Closing as not actionable against main. If a similar visibility toggle is reintroduced, the splice handler at chatModelsWidget.ts ~L1250 already restores focus via viewModel.selectedEntry — any new toggle just needs to set selectedEntry before mutating the model list.