V10.514 新增 Webcrumbs host data API

tests/test_external_tool_entrypoints.py

@@ -39,9 +39,14 @@ def test_external_tool_bridge_pages_are_diagnostic_not_blank():
     assert "external-tool-diagnostics" in template
     assert "external-tool-action-grid" in template
     assert "def webcrumbs_status()" in route_source
+    assert "@system_public_bp.route('/api/webcrumbs/marketplace-host-data')" in route_source
+    assert "def webcrumbs_marketplace_host_data_api()" in route_source
+    assert "build_webcrumbs_seed_data(limit=limit)" in route_source
+    assert "'allowed_match_contract': 'exact/total_price/price_alert_exact'" in route_source
     assert "def webcrumbs_asset_proxy(asset_path)" in route_source
     assert "WEBCRUMBS_ASSET_ALLOWED_PREFIXES" in route_source
     assert "Webcrumbs 共用 UI Runtime" in service_source
+    assert "def build_webcrumbs_seed_data(limit: int = 5)" in service_source
     assert "build_webcrumbs_marketplace_host_data" in service_source
     assert "plugin_previews" in service_source
     assert "finance.market-ticker-strip/0.1.0" in service_source

tests/test_webcrumbs_host_data_service.py

@@ -65,3 +65,19 @@ def test_webcrumbs_host_data_uses_empty_state_without_risks(monkeypatch):
     assert payload["marketSnapshot"][0]["freshness_status"] == "no_current_exact_risk"
     assert payload["aiCandidate"]["release_status"] == "blocked"
     assert "非同款、單位價或變體候選" in payload["aiCandidate"]["thesis"]
+
+
+def test_webcrumbs_seed_data_fallback_does_not_expose_demo_values(monkeypatch):
+    from services import external_tool_payload_service as payload_service
+
+    def boom(limit):
+        raise RuntimeError("db unavailable")
+
+    monkeypatch.setattr(payload_service, "build_webcrumbs_marketplace_host_data", boom)
+
+    payload = payload_service.build_webcrumbs_seed_data(limit=5)
+
+    assert payload["marketSnapshot"][0]["freshness_status"] == "diagnostic_unavailable"
+    assert payload["aiCandidate"]["release_status"] == "blocked"
+    assert "fallback demo" in payload["aiCandidate"]["thesis"]
+    assert "TAIEX" not in str(payload)