## MODIFIED Requirements
### Requirement: Toolbox Discovery SHALL be folded into App Center
The system SHALL expose toolbox and AIGCPanel utility discovery through App Center instead of a standalone tools navigation page.

#### Scenario: User views main navigation
- **WHEN** the main shell navigation renders
- **THEN** no standalone tools navigation item is shown
- **AND** App Center remains available as the entry point for utility tools

#### Scenario: User opens a legacy tools route
- **WHEN** the user opens an existing tools route or bookmark
- **THEN** the system redirects or presents an App Center equivalent
- **AND** the relevant utility tools remain reachable