fix stream error handling

PATCH_README_STREAM_SHOP_FIX.md

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+# RetrieX Stream/Shop Fix Patch
+
+This patch contains only the files changed for the Stream/Shop robustness fix.
+
+Changed files:
+- public/assets/js/base.js
+- src/Agent/AgentRunner.php
+- src/Commerce/SearchRepairService.php
+- src/Commerce/ShopSearchService.php
+- src/Controller/AskSseController.php
+- src/Shopware/ShopwareCriteriaBuilder.php
+- src/Shopware/StoreApiClient.php
+- src/Shopware/StoreApiException.php
+
+Not included:
+- var/cache
+- var/log
+- var/knowledge
+- full project/vendor/data files
+
+Recommended after applying:
+- Clear Symfony cache
+- Restart PHP-FPM / web container if OPcache is active
+- Test the known 1.4.2 regression prompts and one shop-search prompt