DeepSeek brain + automatic image recognition

Key features

• Anonymous endpoints are hard-capped at 20 s (a hanging free tier can no longer stall a turn for minutes)
• GUI image attachments auto-transcribed for text-only DeepSeek on DeepSeek Harness.
• Key resolution orderconfig apiKey → $VISION_API_KEY → $DASHSCOPE_API_KEY.
• RightDeepSeek's full answer derived from the transcribed image text.
• HTTP 429 on anonymous endpoints fails immediately instead of sleeping on a useless Retry-After