chore(test): проверить изоляцию повтора при смене источника

docs/ux-ui/acceptance/browser-outbox-source-2026-10-08.json

@@ -0,0 +1,58 @@
+{
+  "date": "2026-10-08",
+  "frontendSource": "b55588f",
+  "backendSource": "8782054",
+  "browserHttpMocks": false,
+  "cases": [
+    {
+      "lateOutcome": "normal-receipt-after-commit",
+      "databaseA": "mmapp_acceptance_20261007",
+      "databaseB": "mmapp_acceptance_sourceb_20261008",
+      "heldAfterActualCommit": {
+        "id": "acceptance-source-A-1791445970964",
+        "status": "pending",
+        "resolution_version": 1,
+        "retry_count": 0
+      },
+      "sourceBUnchangedAndWritable": true,
+      "noCheckpointLeakToB": true,
+      "checkpointRetainedOnReturnA": true,
+      "lateOutcomeCannotClearCheckpoint": true,
+      "reloadPreservesCheckpoint": true,
+      "explicitReviewDoesNotRetry": true,
+      "retryRequests": 1,
+      "sourceBRetryCalls": 0,
+      "externalSenderCalls": 0,
+      "mobileFits": true,
+      "pageErrors": []
+    },
+    {
+      "lateOutcome": "backend-error-after-commit",
+      "databaseA": "mmapp_acceptance_20261007",
+      "databaseB": "mmapp_acceptance_sourceb_20261008",
+      "heldAfterActualCommit": {
+        "id": "acceptance-source-A-1791445970964",
+        "status": "pending",
+        "resolution_version": 1,
+        "retry_count": 0
+      },
+      "sourceBUnchangedAndWritable": true,
+      "noCheckpointLeakToB": true,
+      "checkpointRetainedOnReturnA": true,
+      "lateOutcomeCannotClearCheckpoint": true,
+      "reloadPreservesCheckpoint": true,
+      "explicitReviewDoesNotRetry": true,
+      "retryRequests": 1,
+      "sourceBRetryCalls": 0,
+      "externalSenderCalls": 0,
+      "mobileFits": true,
+      "pageErrors": []
+    }
+  ],
+  "limits": [
+    "Current committed frontend in Next dev local mode; deployed production remains locked same-origin",
+    "Two real backend processes and distinct PostgreSQL databases, synthetic queue fixtures",
+    "Response held after actual SQL COMMIT; navigation aborts old client request; no physical network fault",
+    "Auth false; no real Telegram send/chat or Portal login"
+  ]
+}