phase 6

backend/app/images/schemas.py

@@ -83,6 +83,23 @@ class BoardImageCreate(BaseModel):
         return v
 
 
+class BoardImageUpdate(BaseModel):
+    """Schema for updating board image position/transformations."""
+
+    position: dict[str, float] | None = Field(None, description="Canvas position")
+    transformations: dict[str, Any] | None = Field(None, description="Image transformations")
+    z_order: int | None = Field(None, description="Layer order")
+    group_id: UUID | None = Field(None, description="Group membership")
+
+    @field_validator("position")
+    @classmethod
+    def validate_position(cls, v: dict[str, float] | None) -> dict[str, float] | None:
+        """Validate position has x and y if provided."""
+        if v is not None and ("x" not in v or "y" not in v):
+            raise ValueError("Position must contain 'x' and 'y' coordinates")
+        return v
+
+
 class BoardImageResponse(BaseModel):
     """Response for board image with all metadata."""