fix(settings): remove obsolete thread controls

[leoisadev1]

What Changed

• Removed auto-settle preferences and inactivity or pull-request-driven settlement across web, desktop, and mobile.
• Removed automatic conversation naming from first-turn generation, provider metadata, and bot or group prompt seeds.
• Removed bot-irrelevant thread controls from General settings and renamed the remaining model control to Fallback model.
• Updated contracts, focused tests, and user documentation for manual-only settlement.

Why

Akeru uses a bot roster. The inherited thread automation and General settings exposed a T3 Code workflow that the bot interface does not use.

UI Changes

Before

After

Testing

• vp test run on 10 focused files: 345 tests passed.
• Targeted typechecks passed for contracts, server, web, mobile, and desktop.
• Targeted lint passed with one existing SettingsPanels.tsx inline-schema warning.
• Browser verification confirmed the retired General settings are absent.

Checklist

• This PR is small and focused
• I explained what changed and why
• This PR does not add a plugin or provider
• I included before/after screenshots for the UI changes
• This PR has no animation or interaction change that needs a video

Model: gpt-5.6-sol
Harness: Codex in T3 Code

[vercel]

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Project	Deployment	Actions	Updated
akeru-bot-landing	Building	Preview	Sep 2, 2026 9:12pm UTC

[greptile-apps]

Greptile Summary

This PR removes obsolete automatic settlement and conversation-naming behavior while retaining manual thread lifecycle controls.

• Removes auto-settlement preferences and merged/inactive thread classification across clients.
• Removes first-turn and provider-driven automatic thread renaming.
• Simplifies General settings while restoring the mobile Project Grouping entry.
• Updates shared contracts, tests, and thread-sidebar documentation.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains; the previously reported Project Grouping navigation issue is fixed by restoring a row whose target is registered and correctly wired.

Important Files Changed

Filename	Overview
apps/mobile/src/features/settings/SettingsRouteScreen.tsx	Removes the obsolete auto-settle switch while preserving a valid, reachable Project Grouping settings row.
packages/client-runtime/src/state/threadSettled.ts	Restricts effective settlement behavior to the remaining manual lifecycle state.
apps/server/src/orchestration/Layers/ProviderCommandReactor.ts	Removes automatic first-turn title generation while retaining other first-turn processing.
packages/contracts/src/orchestration.ts	Updates orchestration contracts to remove the obsolete title-seed field.
apps/web/src/components/settings/SettingsPanels.tsx	Removes obsolete General settings controls and presents the remaining model preference as the fallback model.

_{Reviews (5): Last reviewed commit: "Merge remote-tracking branch 'origin/mai..." | Re-trigger Greptile}