feat(i18n): replace Chinese UI text in Step4Report.vue render functions

Only UI display text is replaced. Regex parsing patterns are kept as-is
since they match the backend output format.

locales/en.json

@@ -213,7 +213,39 @@
     "waitingForReportAgent": "Waiting for Report Agent...",
     "collapse": "Collapse ▲",
     "expandAll": "Show all {count} ▼",
-    "expandAllEntities": "Show all {count} ▼"
+    "expandAllEntities": "Show all {count} ▼",
+    "scenarioLabel": "Scenario: ",
+    "tabKeyFacts": "Key Facts ({count})",
+    "tabCoreEntities": "Core Entities ({count})",
+    "tabRelationChains": "Relation Chains ({count})",
+    "tabSubQueries": "Sub-queries ({count})",
+    "panelKeyFacts": "Latest key facts from temporal memory",
+    "totalCount": "{count} total",
+    "totalEntityCount": "{count} total",
+    "panelCoreEntities": "Core Entities",
+    "factCount": "{count} facts",
+    "panelRelationChains": "Relation Chains",
+    "panelSubQueries": "Drift query analysis sub-questions",
+    "emptyKeyFacts": "No key facts available",
+    "emptyCoreEntities": "No core entities available",
+    "emptyRelationChains": "No relation chains available",
+    "tabActiveFacts": "Active Facts ({count})",
+    "tabHistoricalFacts": "Historical Facts ({count})",
+    "tabEntities": "Entities ({count})",
+    "panelActiveFacts": "Active Facts",
+    "emptyActiveFacts": "No active facts available",
+    "panelHistoricalFacts": "Historical Facts",
+    "emptyHistoricalFacts": "No historical facts available",
+    "panelEntities": "Entities",
+    "emptyEntities": "No entities available",
+    "searchLabel": "Search: ",
+    "tabFacts": "Facts ({count})",
+    "tabEdges": "Edges ({count})",
+    "tabNodes": "Nodes ({count})",
+    "panelSearchResults": "Search Results",
+    "emptySearchResults": "No results found",
+    "panelRelatedEdges": "Related Edges",
+    "panelRelatedNodes": "Related Nodes"
   },
   "step5": {
     "interactiveTools": "Interactive Tools",