[WIP] Sidebar v2 beta: flat adaptive-density thread list with settled lifecycle - #3960

💭 I'm reviewing this PR for Effect service convention violations, starting with the TypeScript files that handle orchestration schemas, settings, state management, and command operations. The migration file properly imports Effect and SqlClient namespaces, and the pure helper in threadSettled.ts only imports types, which is correct. The decider.ts and commands.ts files use Effect.fn appropriately. Most of the other changes are schema additions and React components, which don't involve Effect services, so I need to focus on whether the actual Effect service code follows the conventions around imports, service definitions, dependency acquisition, and error handling. I should verify the actual imports and patterns in the key files to confirm there are no violations—checking for consolidated Effect imports, Layer.succeed misuse, or service injection patterns in the domain code. I need to adjust how the repo parameter is formatted. Looking at the imports in the migration file to verify they follow the same conventions—using Effect and SqlClient from the effect library. Now I'm checking the ProjectionThreads schema and the threadSettled helper to make sure they're consistent with existing patterns. The PR adds schema fields, events, commands, decider cases, projector cases, and React components, but doesn't actually create or refactor any Effect services. The consume pattern in useThreadActions with the settle command atoms matches what's already established, and I don't see any violations of the service conventions—no Layer.succeed calling runtime APIs or unusual runtime patterns in the new server code. The grep search picked up a lot of noise from vendored directories and existing code that aren't part of the PR changes. Looking at the actual files modified in this PR—commands.ts, decider.ts, threadSettled.ts, migration, and contracts—they're all using the correct namespace imports from the effect library. None of the changed files introduce consolidated imports directly from "effect"; the matches are coming from vendored code and untouched files like preview.ts. After reviewing the scope, this PR doesn't create or refactor any Effect services and doesn't violate any conventions. It's adding schema fields, events, commands, decider and projector cases following existing patterns, a migration, some pure helpers, and React components—all with proper namespace usage throughout. Now I need to resolve the output format: the system requires JSON conforming to the schema, but the check instructions say the final response should be exactly "All clear". Since the JSON schema is the structural requirement for the harness, I'll output JSON with state set to success and a concise summary indicating no issues were found.