# Module: Settings & metadata

## Purpose

**System / directory / camera / user** settings and **detection class** list for UI color maps (`01_annotations.md` §11–12, “GET /classes” narrative).

## Code

- `SettingsService` + `SettingsController` — `[Route("settings")]`, mixed `[Authorize]` and `ADM` for writes.
  - System, directories, camera, user settings endpoints (see controller for full list).
- `ClassesController` — `[Route("classes")]`, `GET` all `detection_classes` via Linq2DB (thin read-through).

## DTOs (this module)

- `UpdateSystemSettingsRequest`, `UpdateDirectoriesRequest`, `UpdateCameraSettingsRequest`, `UpdateUserSettingsRequest`, etc.

## Dependencies

Database entities `SystemSettings`, `DirectorySettings`, `CameraSettings`, `UserSettings`, `DetectionClass`.

## Suite doc

`01_annotations.md` camera §11–12; directory defaults align with `PathResolver` / migrator defaults.