feat(web): sticky provider options and Grok composer affordances

[EnzoTironi]

Recovery: New PR after head fork EnzoTironi/t3code was deleted (auto-closed #5426). Same branch tip.

Original: #5426

What Changed

• Sticky composer options fall back when the per-thread draft has no options, so picker changes (e.g. Grok effort) reach sendTurn on existing threads
• Sticky does not override the thread/project model slug
• Sticky options re-keyed under the selected instance id (custom instances work)
• Gate built-in /plan /default slash items on showInteractionModeToggle
• Remove Grok "Early Access" badge

Fixes #5421

Why

Without sticky option fallback, changing effort on an existing thread kept stale thread-turn options. Folding sticky into selectedModel would silently switch models — fixed so sticky is options-only.

UI Changes

Grok Early Access badge removed

Before (badge present):

After (badge removed; Cursor still has Early Access):

Composer effort control (sticky options apply to this picker)

Sticky is send-payload behavior (no new components). /plan slash only when the provider exposes plan mode.

Checklist

• This PR is small and focused (~+237 / 4 files)
• I explained what changed and why
• Before/after screenshots for badge removal
• Effort picker screenshot (sticky option surface)
• Video N/A

Test plan

• composerDraftStore unit tests (sticky options, model preserve, instance re-key)

Model: grok-4.5 (Grok Build)

---

Note

Medium Risk
Changes how composer model options are merged for send payloads across instances and sticky state; well-covered by new unit tests but affects multi-provider draft behavior.

Overview
Fixes composer option resolution (e.g. Grok reasoning effort) so picker changes on existing threads reach sendTurn without changing the thread/project model slug.

deriveEffectiveComposerModelState now takes stickyModelSelectionByProvider and resolves options per selected instance via optionsForInstance, with precedence: draft options for the current instance → sticky → thread/project. Cross-instance and legacy kind-keyed draft entries no longer block sticky; Grok is included in setProviderModelOptions persistence.

Built-in /plan and /default slash menu items only appear when showInteractionModeToggle is true. Grok’s Early Access settings badge is removed.

^{Reviewed by Cursor Bugbot for commit 907d061. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Add sticky provider options and Grok composer affordances in the chat composer

• deriveEffectiveComposerModelState now accepts stickyModelSelectionByProvider and uses it as a fallback when the draft lacks options for the selected provider instance, without affecting model slug resolution.
• Option lookups are scoped to the selected provider instance via a new optionsForInstance helper, replacing the broader modelSelectionByProviderToOptions.
• Grok is added to the providers whose options are persisted in setProviderModelOptions, matching the behavior of codex, claudeAgent, cursor, and opencode.
• /plan and /default slash commands are gated behind composerProviderControls.showInteractionModeToggle, hiding them for providers that don't expose an interaction mode toggle.
• The "Early Access" badge is removed from the Grok provider entry in providerDriverMeta.ts.

^{Macroscope summarized 907d061.}

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[macroscopeapp]

Approvability

Verdict: Needs human review

This PR introduces a new feature with cross-thread sticky model options state and provider-specific UI behavior changes (conditional slash commands). New features with runtime behavior changes and new state management warrant human review.

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