Initial TrueGrowth source import

openspec/changes/update-aigcpanel-tools-app-center/specs/app-center/spec.md

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+## 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

openspec/changes/update-aigcpanel-tools-app-center/specs/toolbox/spec.md

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+## 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