docs(rpa): mandate poll_until and raise kit min to 1.2.11 (v1.0.78)

Backport bounded readiness-wait convention and thin env/readiness error codes from platform-kit 1.2.11 into template docs, examples, and default platform_kit_min_version.

Co-authored-by: Cursor <cursoragent@cursor.com>

examples/real_browser_rpa/scripts/service/task_rpa.py

@@ -12,6 +12,7 @@ from typing import Any, Callable, Dict, List, Optional, Tuple
 
 from jiangchang_skill_core import config
 from jiangchang_skill_core.activity import interruptible_sleep
+from jiangchang_skill_core.rpa import poll_until
 
 from service.browser_session import close_browser_context, get_start_url, start_browser_session
 from service.human_verification import (
@@ -236,17 +237,20 @@ async def _find_search_button(page):
 
 
 async def _wait_search_results(page, timeout_sec: float = 45.0) -> bool:
-    deadline = time.monotonic() + timeout_sec
-    while time.monotonic() < deadline:
+    """有界等待搜索结果容器出现（kit poll_until；区分加载中与超时未就绪）。"""
+
+    async def _ready() -> bool:
         try:
             url = page.url or ""
             if "/search" in url or "search" in url.lower():
                 if await page.locator(RESULT_CONTAINER_SELECTOR).count() > 0:
                     return True
         except Exception:
-            pass
-        await interruptible_sleep(0.8)
-    return False
+            return False
+        return False
+
+    result = await poll_until(_ready, timeout_sec=timeout_sec, interval_sec=0.8)
+    return result.ok
 
 
 async def _has_end_marker(page) -> bool: