fix: remove dead store code and add search input maxLength

- Remove unused networkData, searchQuery, searchResults from zustand store
- Remove setNetworkData write in NetworkGraph
- Add maxLength={200} to search input

src/store/referralNetwork.ts

@@ -1,11 +1,5 @@
 import { create } from 'zustand';
-import type {
-  NetworkGraphData,
-  SelectedNode,
-  NetworkFilters,
-  NetworkUserNode,
-  NetworkCampaignNode,
-} from '@/types/referralNetwork';
+import type { SelectedNode, NetworkFilters } from '@/types/referralNetwork';
 
 const DEFAULT_FILTERS: NetworkFilters = {
   campaigns: [],
@@ -14,51 +8,33 @@ const DEFAULT_FILTERS: NetworkFilters = {
 };
 
 interface ReferralNetworkState {
-  networkData: NetworkGraphData | null;
   selectedNode: SelectedNode;
   hoveredNodeId: string | null;
   highlightedNodes: Set<string>;
-  searchQuery: string;
-  searchResults: { users: NetworkUserNode[]; campaigns: NetworkCampaignNode[] };
   filters: NetworkFilters;
   isFiltersOpen: boolean;
 
-  setNetworkData: (data: NetworkGraphData) => void;
   setSelectedNode: (node: SelectedNode) => void;
   setHoveredNode: (id: string | null) => void;
   setHighlightedNodes: (nodes: Set<string>) => void;
-  setSearchQuery: (query: string) => void;
-  setSearchResults: (results: {
-    users: NetworkUserNode[];
-    campaigns: NetworkCampaignNode[];
-  }) => void;
   updateFilters: (filters: Partial<NetworkFilters>) => void;
   resetFilters: () => void;
   setIsFiltersOpen: (open: boolean) => void;
 }
 
 export const useReferralNetworkStore = create<ReferralNetworkState>()((set) => ({
-  networkData: null,
   selectedNode: null,
   hoveredNodeId: null,
   highlightedNodes: new Set<string>(),
-  searchQuery: '',
-  searchResults: { users: [], campaigns: [] },
   filters: { ...DEFAULT_FILTERS },
   isFiltersOpen: false,
 
-  setNetworkData: (data) => set({ networkData: data }),
-
   setSelectedNode: (node) => set({ selectedNode: node }),
 
   setHoveredNode: (id) => set({ hoveredNodeId: id }),
 
   setHighlightedNodes: (nodes) => set({ highlightedNodes: nodes }),
 
-  setSearchQuery: (query) => set({ searchQuery: query }),
-
-  setSearchResults: (results) => set({ searchResults: results }),
-
   updateFilters: (partial) =>
     set((state) => ({
       filters: { ...state.filters, ...partial },