feat: allow disabling provider update checks

[repparw]

Summary

Adds a persisted server setting, enableProviderUpdateChecks, to control provider CLI update checks. When disabled, provider snapshot enrichment skips latest-version resolution entirely instead of letting the checker run and hiding the resulting UI notification.

Changes

• packages/contracts/src/settings.ts — Adds enableProviderUpdateChecks to server settings and settings patches, defaulting to true.
• apps/web/src/components/settings/SettingsPanels.tsx — Adds a General Settings switch for provider update checks.
• apps/server/src/provider/providerUpdateSettings.ts — Shares provider snapshot settings derived from provider config plus server settings.
• Provider drivers — Codex, Claude, Cursor, Grok, and OpenCode now observe the setting and pass it into version advisory enrichment.
• apps/server/src/provider/providerMaintenance.ts — Skips latest-version resolution when update checks are disabled, returning an unknown advisory without contacting the registry.
• Removes the prior environment descriptor capability / web toast suppression path.

Motivation

Some users install providers through external package managers such as Nix/nixpkgs, where npm latest is not the source of truth. In that case T3 Code should not run the provider update checker at all, rather than only suppressing the launch notification.

Test plan

• vp run typecheck
• vp check
• vp test run apps/server/src/provider/providerMaintenance.test.ts

Note: in this local shell, normal pnpm install failed because node-pty needed Python for node-gyp; dependencies were linked with pnpm install --ignore-scripts so the validation commands could run.

Note

Add enableProviderUpdateChecks setting to disable provider version advisory checks

• Adds enableProviderUpdateChecks boolean (default true) to ServerSettings and ServerSettingsPatch in settings.ts, and exposes a toggle in the General settings panel.
• Updates enrichProviderSnapshotWithVersionAdvisory in providerMaintenance.ts to skip network version lookups when the flag is false, preserving checkedAt without making requests.
• All provider drivers (Claude, Codex, Cursor, Grok, OpenCode) now inject ServerSettingsService and propagate enableProviderUpdateChecks through their snapshot enrichment pipelines via the new providerUpdateSettings.ts module.
• Behavioral Change: drivers now require ServerSettingsService at runtime; tests must include ServerSettingsService.layerTest() in their test layers.

^{Macroscope summarized 8e49a0d.}

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[macroscopeapp]

Approvability

Verdict: Needs human review

This PR introduces a new user-facing feature (toggle to disable provider update checks) with changes spanning 5 provider drivers, a new abstraction layer, schema additions, and UI controls. The cross-cutting nature of the changes and the author being new to the codebase warrant human review.

^{You can customize Macroscope's approvability policy. Learn more.}

Dismissing prior approval to re-evaluate b801730

Dismissing prior approval to re-evaluate e7f9677

[juliusmarminge]

this feels like the wrong approach. should jsut be a setting like everythign else and it shouldn't be a UI level thing, it should block the update checker to run in the first place, not just suppress the toast

Dismissing prior approval to re-evaluate 8e49a0d