## MODIFIED Requirements
### Requirement: App Center SHALL be the primary discovery surface
The system SHALL present first-party creation modules and AIGCPanel utility apps in App Center as the primary discovery surface, and media-generation cards SHALL open the relevant page mode inside the unified image, video, or music creation experience.

#### Scenario: User opens a media-generation app card
- **WHEN** the user opens an image, video, popular video, popular MV, or music generation card from App Center
- **THEN** the system opens the relevant media generation page
- **AND** selects the matching page mode automatically
- **AND** does not require the user to find a separate toolbox navigation page

#### Scenario: User scans App Center media apps
- **WHEN** the user filters App Center by image, video, or audio
- **THEN** generation cards remain discoverable
- **AND** cards describe the mode they will open rather than implying each card is a separate standalone page