feat: Add complete Doubao API support (Seedance + Seedream)

[inoribea]

Summary

This PR adds complete support for Doubao (豆包) API, including Seedance (video generation) and Seedream (image generation) capabilities.

Changes

Core API Clients

• Seedance API: Added src/api/seedance.ts with full video generation API integration
  • Text-to-video generation
  • Image-to-video generation
  • First & last frame video generation
• Seedream API: Added src/api/seedream.ts with full image generation API integration
  • Text-to-image generation
  • Image-to-image editing
  • Multi-image fusion
  • Group image generation
  • Image editing with mask support

Components

• Seedance:
  • src/views/video/seedanceInput.vue - User input component
  • src/views/video/seedancePage.vue - Main page component
• Seedream:
  • src/views/mj/aiSeedream.vue - Complete UI component with all modes

Routing & Integration

• Added /seedance route for Seedance feature
• Integrated Seedream into src/api/openapi.ts:
  • handleSeedream() - Process text/multi-image generation
  • handleSeedreamEdit() - Process image editing with mask
• Added action handlers: gpt.seedream and gpt.seedream.edit

Templates & Configuration

• Added two Seedance video generation templates:
  • doubao-seedance-1-0-pro-250528 - Pro version with extended options
  • doubao-seedance-1-0-lite-i2v-250428 - Lite version for image-to-video
• Added environment variables:
  • DOUBAO_SERVER - Doubao API endpoint
  • DOUBAO_KEY - Doubao API key
  • Smart fallback to OPENAI_API_BASE_URL and OPENAI_API_KEY

i18n & Documentation

• Added comprehensive Chinese and English translations for both features
• Updated README with:
  • Feature descriptions
  • Configuration guide
  • Docker deployment examples

Seedance Features

• ✅ Text-to-video generation
• ✅ Image-to-video generation (first frame)
• ✅ First & last frame video generation
• ✅ Configurable resolution (720p/1080p)
• ✅ Configurable aspect ratio (16:9/9:16/1:1)
• ✅ Configurable duration (5s/8s/10s/12s for pro, 5s/8s/10s for lite)
• ✅ FPS selection (24/30 fps)
• ✅ Camera fixed mode toggle
• ✅ Watermark control
• ✅ Custom seed support
• ✅ Model list caching (10 minutes TTL)

Seedream Features

• ✅ Text-to-image generation
• ✅ Image-to-image editing
• ✅ Multi-image fusion (up to 14 reference images)
• ✅ Group image generation (multiple coherent images)
• ✅ Image editing with mask support
• ✅ Configurable resolution (1K/2K/4K)
• ✅ Response format selection (URL/Base64)
• ✅ Watermark control
• ✅ Prompt optimization
• ✅ Model list caching (10 minutes TTL)

[vercel]

@inoribea is attempting to deploy a commit to the dooy's projects Team on Vercel.

A member of the Team first needs to authorize it.