## ADDED Requirements
### Requirement: Video Generation Page SHALL Provide Mode Switching
The system SHALL let users switch video creation modes inside the video generation page, including normal video generation, popular video generation, and popular MV generation.

#### Scenario: Switch between video modes
- **GIVEN** the user is on the video generation page
- **WHEN** the user selects normal video generation, popular video generation, popular MV generation, or another supported video creation mode
- **THEN** the page updates the active workflow for that mode
- **AND** keeps the user on the same video page

#### Scenario: Popular video and MV modes preserve batch behavior
- **WHEN** the user selects popular video generation or popular MV generation
- **THEN** the page exposes the existing storyboard, lens, model, size, and batch-generation controls required by that workflow
- **AND** the existing serial batch generation requirements remain in effect

### Requirement: Video Generation Page SHALL Remove Legacy Tool Context Header
The video generation page SHALL not render the legacy `tg-tool-context` top context bar.

#### Scenario: User views video generation page
- **WHEN** the video generation page renders
- **THEN** the top page controls are mode-focused
- **AND** no `tg-tool-context` header is shown above the video workflow