fix: 对比图像相对位置字段正名(被搜索图像/查找目标小图)+填反自动互换兜底, 补OCR与相对位置冒烟回归

src/main/capabilities/remaining-core.ts

@@ -203,9 +203,33 @@ register("Image_CropImg", async (_ctx, node, args) => {
   await powershell(`Add-Type -AssemblyName System.Drawing;$image=[System.Drawing.Image]::FromFile(${psString(input)});$rect=[System.Drawing.Rectangle]::new(${x},${y},${width},${height});$bitmap=[System.Drawing.Bitmap]::new($rect.Width,$rect.Height);$graphics=[System.Drawing.Graphics]::FromImage($bitmap);$graphics.DrawImage($image,[System.Drawing.Rectangle]::new(0,0,$rect.Width,$rect.Height),$rect,[System.Drawing.GraphicsUnit]::Pixel);$bitmap.Save(${psString(output)});$graphics.Dispose();$bitmap.Dispose();$image.Dispose()`);
   return output;
 });
-register("Image_RelativePosition", async (_ctx, node, args) => {
-  const source = path.resolve(text(args, ["source", "image"])); const template = path.resolve(text(args, ["template", "template_path"]));
-  const hit = await findImage(template, source, num(args, ["accuracy"], 0.2)); if (!hit) throw new RuntimeError("not_found", "模板未出现在源图中"); return hit;
+register("Image_RelativePosition", async (ctx, node, args) => {
+  const source = path.resolve(text(args, ["source", "image"]));
+  const template = path.resolve(text(args, ["template", "template_path"]));
+  if (!source.trim() || !template.trim()) throw new RuntimeError("validation_error", "被搜索图像与查找目标都需填写图片路径", { nodeId: node.id, componentId: node.componentId });
+  if (!fs.existsSync(source)) throw new RuntimeError("validation_error", `找不到被搜索图像：${source}`, { nodeId: node.id, componentId: node.componentId });
+  if (!fs.existsSync(template)) throw new RuntimeError("validation_error", `找不到查找目标图片：${template}`, { nodeId: node.id, componentId: node.componentId });
+  // 兼容填反：模板比源图大时（首次查找直接抛"还大"错误）自动互换，
+  // 大图当被搜索图、小图当查找目标，语义仍是「小图在大图中的位置」
+  const accuracy = num(args, ["accuracy"], 0.2);
+  let hit: Awaited<ReturnType<typeof findImage>> = null;
+  let firstError: unknown = null;
+  try {
+    hit = await findImage(template, source, accuracy);
+  } catch (error) {
+    firstError = error;
+    try {
+      hit = await findImage(source, template, accuracy);
+      if (hit) ctx.log("两张图疑似填反，已自动按「小图在大图中」查找并命中", "warn", node.id);
+    } catch {
+      // 互换也失败则回落到原始方向的错误信息
+    }
+  }
+  if (!hit) {
+    if (firstError) throw firstError;
+    throw new RuntimeError("not_found", "查找目标未出现在被搜索图像中", { nodeId: node.id, componentId: node.componentId, recommendation: "「查找目标」应是被搜索图里出现的小图案（按钮/图标/文字块）；两张图互不包含时无法匹配" });
+  }
+  return hit;
 });
 
 register("logic_control_if_ai_vision", async (ctx, node, args) => {