feat(ui): Live Changes (CDC) tab — real-time Debezium stream with filters, volume bars and before/after diff

ui/src/App.tsx

@@ -18,6 +18,7 @@ import { KnowledgeChatView } from './components/features/KnowledgeChatView'
 import { StorageView } from './components/features/StorageView'
 import { HdfsView } from './components/features/HdfsView'
 import { DataGenView } from './components/features/DataGenView'
+import { ChangesView } from './components/features/ChangesView'
 import { SearchView } from './components/features/SearchView'
 import { SshTerminal } from './components/features/SshTerminal'
 import { TerminalDock } from './components/features/TerminalDock'
@@ -128,6 +129,8 @@ export default function App() {
                   />
                 ) : cc.mainView === 'datagen' ? (
                   <DataGenView onPulse={cc.pulseFlow} onOpenPlatform={() => cc.setMainView('platform')} />
+                ) : cc.mainView === 'changes' ? (
+                  <ChangesView liveChanges={cc.changes} />
                 ) : cc.mainView === 'presentation' ? (
                   <PresentationView />
                 ) : cc.mainView === 'dataquality' ? (