## 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.

#### Scenario: User opens App Center
- **WHEN** the user opens App Center
- **THEN** App Center lists the core TrueGrowth modules
- **AND** App Center lists the AIGCPanel utility apps
- **AND** each utility app is categorized by its workflow area, such as audio, video, image, or utility

### Requirement: App Center SHALL include AIGCPanel audio utilities
The system SHALL include AIGCPanel audio utilities in App Center.

#### Scenario: User browses audio apps
- **WHEN** the user filters or scans App Center audio apps
- **THEN** speech recognition, long text to audio, subtitle to audio, voice replacement, and audio normalization are available
- **AND** opening each card launches the corresponding workflow or embedded tool

### Requirement: App Center SHALL include AIGCPanel video processing utilities
The system SHALL include AIGCPanel video processing utilities in App Center.

#### Scenario: User browses video processing apps
- **WHEN** the user filters or scans App Center video apps
- **THEN** video background add, smart cut, segment zoom, annotation, subtitle add, global speed, size convert, compression, segment speed, segment delete/keep, intro/outro image, add audio, merge, format convert, and FFmpeg processing are available
- **AND** opening each card launches the corresponding workflow or embedded tool