[Feature] Template System - Predefined Scene Templates and Project Templates

[vzeman]

Summary

Build a template system to dramatically accelerate project creation. Templates encode proven scene structures, parameter combinations, and storytelling patterns so users can start with a solid foundation rather than a blank canvas.

Requirements

Project Templates

• Product showcase (10-15 scenes, commercial style)
• Short documentary (5-8 scenes, cinematic)
• Social media reel (5 scenes, vertical, fast-paced)
• Tutorial/explainer (8-12 scenes, clear and informative)
• Music video (12-20 scenes, creative)
• Real estate showcase (6-10 scenes, professional)
• Travel vlog (10-15 scenes, dynamic)

Scene Templates

• Opening title card
• Product close-up
• Aerial establishing shot
• Interview/talking head
• B-roll nature
• Text overlay
• Call-to-action ending

Template Management

• Template browsing UI: gallery with preview images, tags, filter by style/genre
• Template preview: show sample output images
• Apply template to existing project (merge or replace)
• Create custom template from current project
• Share templates (export/import as .aivt file)
• Community templates (optional future: template marketplace)
• Template versioning

Acceptance Criteria

• All built-in project and scene templates are available in the browser
• Templates can be applied to new or existing projects
• Users can create and export custom templates
• Template import from .aivt file works correctly

Related

Part of the ai-video-editor Flutter application. Works with #61 (Project Management) and #62 (Scene Management).