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# System Configuration
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Administrative configuration interface (creme_config) for system settings, entity configuration, UI customization, and application management through web-based configuration tools.
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## Capabilities
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### Configuration Registry
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Central registry system for managing configurable components and settings.
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```python { .api }
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class ConfigRegistry:
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    """
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    Central registry for configuration items and settings.
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    Manages configuration of:
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    - Entity configurations
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    - UI components (bricks, blocks)
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    - User interface settings
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    - Application-specific settings
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    """
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def get_config_registry():
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    """Returns the global configuration registry instance."""
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```
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### Entity Configuration
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Tools for configuring entity behavior, field visibility, and custom properties.
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```python { .api }
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class FieldsConfig:
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    """Configuration for entity field visibility and behavior."""
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class CustomField:
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    """Custom field definitions for extending entity models."""
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class CustomForm:
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    """Custom form configurations for entity creation/editing."""
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```
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### UI Configuration
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Interface configuration for dashboards, detail views, and list displays.
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```python { .api }
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class BrickConfig:
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    """Configuration for dashboard bricks and blocks."""
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class HeaderFilter:
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    """Configuration for list view columns and filtering."""
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class MenuConfig:
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    """Navigation menu configuration."""
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```
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### User Management Configuration
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Tools for configuring user roles, permissions, and access control.
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```python { .api }
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class UserRole:
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    """User role definitions and permissions."""
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class EntityCredentials:
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    """Entity-level access control configuration."""
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class CredentialsConfig:
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    """Credential system configuration."""
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```
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## Imports
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```python
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from creme.creme_config.registry import config_registry
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from creme.creme_config.core import ConfigRegistry
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```
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## Web Interface
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The creme_config app provides web-based administration interfaces accessible at:
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- `/creme_config/`: Main configuration dashboard
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- `/creme_config/entity/`: Entity configuration tools
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- `/creme_config/fields/`: Field configuration management
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- `/creme_config/bricks/`: UI brick configuration
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- `/creme_config/user/`: User and role management