小优化，产品愿景，视觉规范，交互和导航大版本

art-agent/backend/app/config.py

@@ -228,6 +228,50 @@ IMAGE_MODELS: dict[str, dict[str, Any]] = {
 }
 
 
+# ─── 视角变换模型注册表 ─────────────────────────────────
+#
+# 视角变换模型不用于生图，而是将已有图片转换为不同视角。
+# 输入通常只需一张图，输出为多个固定视角的图片。
+
+VIEW_TRANSFORM_MODELS: dict[str, dict[str, Any]] = {
+    "zero123plus": {
+        "id": "zero123plus",
+        "name": "Zero123++",
+        "provider": "replicate",
+        "model_id": "jd7h/zero123plusplus:c69c6559a29011b576f1ff0371b3bc1add2856480c60520c7e9ce0b40a6e9052",
+        "description": "单图生成 6 个固定视角，适合建筑/物体的多角度预览",
+        "output_views": [
+            {"azimuth": 30, "elevation": 30},
+            {"azimuth": 90, "elevation": -20},
+            {"azimuth": 150, "elevation": 30},
+            {"azimuth": 210, "elevation": -20},
+            {"azimuth": 270, "elevation": 30},
+            {"azimuth": 330, "elevation": -20},
+        ],
+        "grid_layout": {"cols": 3, "rows": 2},
+    },
+}
+
+
+def get_view_transform_model_config(model_id: str | None = None) -> dict[str, Any]:
+    """获取视角变换模型配置，默认返回 zero123plus。"""
+    if model_id and model_id in VIEW_TRANSFORM_MODELS:
+        return VIEW_TRANSFORM_MODELS[model_id]
+    return VIEW_TRANSFORM_MODELS["zero123plus"]
+
+
+def get_view_transform_models_list() -> list[dict]:
+    """返回前端下拉列表所需的视角变换模型摘要信息。"""
+    return [
+        {
+            "id": cfg["id"],
+            "name": cfg["name"],
+            "description": cfg["description"],
+        }
+        for cfg in VIEW_TRANSFORM_MODELS.values()
+    ]
+
+
 def get_default_image_model_id() -> str:
     """返回 .env 中配置的默认模型短 ID，若不在注册表中则回退到 flux-schnell。"""
     env_model = os.getenv("IMAGE_MODEL", "flux-schnell")