[kitlangton]

Summary

• add V2 Protocol and Server routes for current project and project directories
• regenerate @opencode-ai/client with projects.current/directories
• migrate TUI project state and move-session dialog to the generated client

Tests

• bun turbo typecheck
• packages/schema: bun test --timeout 5000 test/contract-hygiene.test.ts
• packages/core: bun test --timeout 5000 test/project-directories.test.ts test/shared-schema.test.ts
• packages/client: bun test --timeout 5000 test/promise.test.ts test/contract-identity.test.ts
• packages/tui: bun test --timeout 5000 test/cli/tui/.test.ts test/cli/cmd/tui/.test.ts test/context/local.test.ts

Closes #34432