新增画布对话助手

src/schemas/canvas_assistant.py

@@ -0,0 +1,31 @@
+from typing import Literal
+
+from pydantic import BaseModel, Field
+
+
+# ====================== 请求模型 ======================
+class TriggerRequest(BaseModel):
+    action: Literal["enter_canvas", "tool_trigger"] = Field(
+        ...,
+        description="操作类型：enter_canvas = 进入画布，tool_trigger = 点击工具"
+    )
+
+    tool_name: str | None = Field(
+        None,
+        description="当 action=tool_trigger 时必填。支持的工具：to_real_style, surface_edit_canvas, surface_edit_ai, color_palette, scene_composition, 3d_model, to_3d_view"
+    )
+
+    language: Literal["zh", "en"] = Field(
+        "zh",
+        description="返回语言：zh=中文，en=英文"
+    )
+
+    class Config:
+        json_schema_extra = {
+            "example": {
+                "session_id": "canvas_20260331_001",
+                "action": "tool_trigger",
+                "tool_name": "3d_model",
+                "language": "zh"
+            }
+        }