## ADDED Requirements

### Requirement: Image query fallback uses AI-focused defaults
When extracted image keywords are insufficient, the system SHALL use AI-focused default fallback terms.

#### Scenario: Empty keyword extraction
- **WHEN** keyword extraction yields no usable topic keywords
- **THEN** the system uses default fallback terms including AI-domain keywords (for example `ai`, `machine learning`, `deep learning`)

### Requirement: Generic AI image fallback is guaranteed
If provider lookups fail to return a usable summary image, the system SHALL use a generic AI-themed fallback image.

#### Scenario: Provider chain failure
- **WHEN** all configured image providers return no usable image
- **THEN** the system assigns a generic AI fallback image URL/path for summary image

### Requirement: Fallback behavior remains context-aware first
The system SHALL attempt context-aware keyword retrieval before any generic fallback image is selected.

#### Scenario: Context-aware attempt precedes fallback
- **WHEN** summary image selection runs for a news item
- **THEN** the system first attempts provider queries from extracted context-aware keywords
- **AND** only falls back to generic AI image if these attempts fail
