fix(ui): optimize react state, performance, and ux logic

- Refactored useFilteredNodes to memoize logic and prevent re-rendering.
- Optimized LeftPanel useMemo dependencies and HostChart O(N) traversal.
- Fixed polling interval desync and added WebSocket throttling/React Strict Mode transport patch.
- Fixed Graph layout dependencies and 'ghost' children chevrons on collapsed nodes.
- Fixed RightPanel tab persistence UI bug and resolved React Hooks order crash.

No remaining known issues from the UI analysis.

src/store/topologyStore.test.ts

@@ -94,39 +94,6 @@ describe('topologyStore', () => {
         });
     });
 
-    /* ----------------------------------------------------------------
-     * Filtering
-     * ------------------------------------------------------------- */
-
-    describe('getFilteredNodes', () => {
-        test('returns all nodes when no filters active', () => {
-            useTopologyStore.getState().setNodes(mockNodes);
-            const filtered = useTopologyStore.getState().getFilteredNodes();
-            expect(filtered).toHaveLength(4);
-        });
-
-        test('filters by search query', () => {
-            useTopologyStore.getState().setNodes(mockNodes);
-            useTopologyStore.getState().setSearchQuery('traefik');
-            const filtered = useTopologyStore.getState().getFilteredNodes();
-            expect(filtered.some(n => n.name === 'Traefik')).toBe(true);
-        });
-
-        test('filters by status', () => {
-            useTopologyStore.getState().setNodes(mockNodes);
-            useTopologyStore.getState().setStatusFilter('stopped');
-            const filtered = useTopologyStore.getState().getFilteredNodes();
-            expect(filtered.every(n => n.data.status === 'stopped')).toBe(true);
-        });
-
-        test('filters by type', () => {
-            useTopologyStore.getState().setNodes(mockNodes);
-            useTopologyStore.getState().toggleTypeFilter('service');
-            const filtered = useTopologyStore.getState().getFilteredNodes();
-            expect(filtered.every(n => n.type === 'service')).toBe(true);
-        });
-    });
-
     /* ----------------------------------------------------------------
      * Type filter toggle
      * ------------------------------------------------------------- */