generate image cannot set resolution or aspectRatio (generate video can)

[caskland-hue]

openart generate video accepts --aspect-ratio and --resolution. openart generate image accepts only --model, --image, -o/--output, --async and --timeout, so there is no way to set a model's image parameters from the CLI.

The models do expose them:

$ openart model form byte-plus-seedream-5-lite text2image
  resolution:  default "2K", enum ["2K","3K"]
  aspectRatio: default "4:3", enum ["1:1","4:3","3:4","16:9","9:16","3:2","2:3","21:9"]
  imageCount:  default 1

But --dry-run shows the request body carries only the prompt:

$ openart generate image "a red fox in the snow" --model byte-plus-seedream-5-lite --dry-run
{
  "body": {
    "model": "byte-plus-seedream-5-lite",
    "media": "image",
    "mode": "text2image",
    "params": { "prompt": "a red fox in the snow" }
  },
  "endpoint": "POST /api/cli/v1/generate"
}

So every CLI image generation returns the server defaults - for this model 2K / 4:3, i.e. 2848x1600. openart model cost quotes 2K and 3K at the same 15 credits, so the CLI cannot reach the larger output at any price, and 16:9 is unreachable entirely.

That makes the CLI unusable for batch image work, which is a shame because --async plus creation list is otherwise a very good batch story. Passing the flags anyway fails with error: unknown flag: --aspect-ratio, and there is no --param-style escape hatch, no config file, and no project- or workspace-level default.

Either of these would fix it:

• wire the existing --aspect-ratio / --resolution flags into generate image as well, or
• add a generic --param key=value (repeatable) validated against model form, which would also cover imageCount, quality, outputFormat and the other per-model fields.

Environment: CLI v0.1.1, macOS arm64 (installed via install.sh).