feat(image-generation): Add ReCraft V4.1 model family support (Standard, Utility, Vector) via OpenRouter

Summary

Add ReCraft V4.1 model family support to OpenClaw's image generation tool, enabling users to access ReCraft's design-oriented models (Standard, Utility, Vector) via the existing image_generate tool.

Motivation

ReCraft V4.1, released in mid-May 2026, is a new generation of image/vector generation model that differentiates itself from existing options by:

1. Design taste — Makes aesthetic decisions about composition, color interaction, and visual flow, producing "art-directed" images rather than generic outputs
2. Vector generation (SVG) — Unlike all other image models that output raster images, ReCraft V4.1 Vector can generate native SVG files — crucial for logos, icons, typography, and UI design
3. Utility line — Optimized for consistency and predictability, ideal for high-volume production (e-commerce, product mockups)

These models fill a gap that no current OpenClaw image generation provider covers: professional vector output and design-quality raster generation.

OpenRouter Availability

ReCraft V4.1 models are already available on OpenRouter (which OpenClaw already supports as an image generation provider), using the following model slugs:

Model Name	OpenRouter Slug
Recraft V4.1	recraft/recraft-v4.1
Recraft V4.1 Pro	recraft/recraft-v4.1-pro
Recraft V4.1 Utility	recraft/recraft-v4.1-utility
Recraft V4.1 Utility Pro	recraft/recraft-v4.1-utility-pro
Recraft V4.1 Vector	recraft/recraft-v4.1-vector
Recraft V4.1 Pro Vector	recraft/recraft-v4.1-pro-vector

Current OpenRouter image model list in OpenClaw only includes google/gemini-3.1-flash-image-preview, google/gemini-3-pro-image-preview, and openai/gpt-5.4-image-2. Adding ReCraft would significantly expand the design capabilities.

Proposed Scope

1. Add recraft/recraft-v4.1 (and variants) to OpenClaw's OpenRouter image provider model catalog
2. Support SVG output format for Vector models (potentially as a format: "svg" option or new outputFormat value)
3. Support the full range of ReCraft's capabilities: aspect ratios, up to ~2048px resolution (Pro models), image-to-image editing

Additional Notes

• ReCraft also supports an independent API at https://api.recraft.ai — could also be considered as a standalone provider plugin
• Vector SVG output is unique to ReCraft among major AI image generators
• Pricing on OpenRouter is approximately $0.04/image