dsh-vision-imagen v1.2.0

Provider abstraction layer — Gemini native + OpenAI-compatible backends (GPT-4o / Qwen-VL / GLM-4V / Moonshot / gpt-image / DALL-E / Flux / SD / OpenRouter). Closed-loop vision self-check after image generation. Full changelog: https://github.com/xuxun-oss/dsh-gemini-bridge/blob/main/CHANGELOG.md