feat: add three-surface RPA locator standards and examples

examples/real_browser_rpa/scripts/service/task_rpa.py

@@ -188,42 +188,22 @@ async def _ensure_logged_in(page, *, wait_sec: int) -> None:
 async def _find_search_input(page) -> Tuple[Optional[Any], str]:
     for sel in SEARCH_INPUT_SELECTORS:
         try:
-            loc = page.locator(sel).first
-            if await _visible(loc):
+            loc = page.locator(sel)
+            count = await loc.count()
+            if count == 1 and await _visible(loc):
                 return loc, sel
+            if count > 1:
+                logger.warning("search_input_ambiguous selector=%s count=%s", sel, count)
         except Exception:
             continue
 
-    candidates: List[Tuple[int, Any, str]] = []
-    try:
-        inputs = await page.locator("input").all()
-    except Exception:
-        inputs = []
-    for inp in inputs:
-        try:
-            if not await inp.is_visible():
-                continue
-            box = await inp.bounding_box()
-            if not box or box.get("width", 0) < 120:
-                continue
-            placeholder = await inp.get_attribute("placeholder") or ""
-            score = box.get("width", 0)
-            if "搜索" in placeholder:
-                score += 500
-            if box.get("y", 9999) < 200:
-                score += 200
-            candidates.append((score, inp, f"input placeholder={placeholder!r}"))
-        except Exception:
-            continue
-    if candidates:
-        candidates.sort(key=lambda x: x[0], reverse=True)
-        _, inp, sel = candidates[0]
-        return inp, sel
-
     try:
         ph = page.get_by_placeholder(re.compile("搜索"))
-        if await ph.count() > 0 and await ph.first.is_visible():
-            return ph.first, "placeholder=搜索"
+        count = await ph.count()
+        if count == 1 and await ph.is_visible():
+            return ph, "placeholder=搜索"
+        if count > 1:
+            logger.warning("search_input_ambiguous selector=placeholder_search count=%s", count)
     except Exception:
         pass
     return None, ""
@@ -232,14 +212,24 @@ async def _find_search_input(page) -> Tuple[Optional[Any], str]:
 async def _find_search_button(page):
     try:
         btn = page.get_by_role("button", name="搜索")
-        if await btn.count() > 0 and await btn.first.is_visible():
-            return btn.first
+        count = await btn.count()
+        if count == 1 and await btn.is_visible():
+            return btn
+        if count > 1:
+            logger.warning("search_button_ambiguous selector=role_button_search count=%s", count)
     except Exception:
         pass
     try:
-        btn = page.locator(SEARCH_BUTTON_SELECTOR).first
-        if await btn.count() > 0 and await btn.is_visible():
+        btn = page.locator(SEARCH_BUTTON_SELECTOR)
+        count = await btn.count()
+        if count == 1 and await btn.is_visible():
             return btn
+        if count > 1:
+            logger.warning(
+                "search_button_ambiguous selector=%s count=%s",
+                SEARCH_BUTTON_SELECTOR,
+                count,
+            )
     except Exception:
         pass
     return None