fix(crawler): read pixelrag artifacts from app data

docs/guides/browse_sh_crawler_playbook.md

@@ -123,6 +123,7 @@ runtime_artifacts/pixelrag_visual_evidence/<platform>/<manifest_id>/capture_rece
 ```
 
 API readback 只讀 receipt 和檔案存在狀態，不重新抓外站、不寫資料庫。
+正式 app 容器內的 readback 預設讀 `/app/data/ai_automation/pixelrag_visual_evidence`；host worker 若直接在 188 執行，預設仍可用 `runtime_artifacts/pixelrag_visual_evidence`，需要給 API 回讀時再同步到容器掛載的 `data/ai_automation`。
 
 安全邊界：
 

services/pixelrag_crawler_integration_service.py

@@ -29,10 +29,14 @@ RESULT_MANIFEST_REJECTED = "PIXELRAG_VISUAL_EVIDENCE_MANIFEST_REJECTED"
 ALLOWED_PLATFORMS = ("momo", "pchome", "market_intel", "external_market")
 DEFAULT_VIEWPORT = {"name": "desktop-1440", "width": 1440, "height": 950}
 DEFAULT_TILE_SIZE = {"width": 512, "height": 512}
-DEFAULT_ARTIFACT_ROOT = os.getenv(
-    "PIXELRAG_VISUAL_EVIDENCE_ROOT",
-    "runtime_artifacts/pixelrag_visual_evidence",
-)
+def _default_artifact_root() -> str:
+    container_root = Path("/app/data/ai_automation")
+    if container_root.exists():
+        return str(container_root / "pixelrag_visual_evidence")
+    return "runtime_artifacts/pixelrag_visual_evidence"
+
+
+DEFAULT_ARTIFACT_ROOT = os.getenv("PIXELRAG_VISUAL_EVIDENCE_ROOT", _default_artifact_root())
 DEFAULT_ARTIFACT_MAX_AGE_HOURS = int(os.getenv("PIXELRAG_VISUAL_EVIDENCE_MAX_AGE_HOURS", "168"))
 VISUAL_FALLBACK_CONFIDENCE_TRIGGERS = {
     "low",