## ADDED Requirements

### Requirement: User Config Storage

The system SHALL store user configuration as JSONB key-value pairs linked to the user.

#### Scenario: Create config on first write
- GIVEN an authenticated user with no config
- WHEN they update settings
- THEN a UserConfig row is created with their user_id

### Requirement: Config Keys

The system SHALL support these configuration keys:
- `default_editor`: string
- `theme`: "light" | "dark" | "system"
- `git_user_name`: string
- `git_user_email`: string

#### Scenario: Update theme
- GIVEN an authenticated user
- WHEN they PATCH /users/me/config with {"theme": "dark"}
- THEN only the theme key is updated
- AND other keys remain unchanged

### Requirement: Config Retrieval

The system SHALL return user configuration on request.

#### Scenario: Get config
- GIVEN an authenticated user with config
- WHEN they GET /users/me/config
- THEN their full configuration is returned

### Requirement: Frontend Theme Application

The system SHALL apply the user's theme preference on application load.

#### Scenario: Load with dark theme
- GIVEN a user with theme="dark"
- WHEN the app loads
- THEN the dark CSS class is applied to the document
