feat: add three-surface RPA locator standards and examples

examples/real_browser_rpa/assets/element-map.sample.yaml

@@ -0,0 +1,45 @@
+surface: browser
+status: placeholder_requires_real_site_inspection
+elements:
+  - logical_name: search_input
+    purpose: 输入搜索关键词
+    scope:
+      kind: main
+      business_container: 待真实拾取
+    primary_locator:
+      strategy: role_or_label
+      value: 待真实拾取
+    fallback_locators: []
+    expected_count: 1
+    ready_condition:
+      visible: true
+      enabled: true
+    postcondition:
+      description: 搜索结果容器出现
+    verified_target_version: 待填写
+
+  - logical_name: search_button
+    purpose: 提交搜索
+    scope:
+      logical_parent: search_form
+    primary_locator:
+      strategy: role
+      value: button,name=搜索
+    fallback_locators: []
+    expected_count: 1
+    postcondition:
+      description: 结果页或业务错误状态出现
+    verified_target_version: 待填写
+
+  - logical_name: result_container
+    purpose: 承载搜索结果
+    scope:
+      kind: main
+    primary_locator:
+      strategy: stable_business_container
+      value: 待真实拾取
+    fallback_locators: []
+    expected_count: 1
+    postcondition:
+      description: 列表项、空结果或结束标记可区分
+    verified_target_version: 待填写