feat: add auth and data providers with mock data hooks

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/hooks/use-campaigns.ts

@@ -0,0 +1,37 @@
+import { useMemo } from 'react';
+
+import type { Campaign, Ad, CampaignStatus } from '@/types/entities';
+import { useData } from '@/providers/data-provider';
+
+type UseCampaignsFilters = {
+    status?: CampaignStatus;
+};
+
+type UseCampaignsResult = {
+    campaigns: Campaign[];
+    ads: Ad[];
+};
+
+export const useCampaigns = (filters: UseCampaignsFilters = {}): UseCampaignsResult => {
+    const { campaigns, ads } = useData();
+    const { status } = filters;
+
+    const filteredCampaigns = useMemo(() => {
+        if (status === undefined) {
+            return campaigns;
+        }
+
+        return campaigns.filter((campaign) => campaign.campaignStatus === status);
+    }, [campaigns, status]);
+
+    const filteredAds = useMemo(() => {
+        const campaignIds = new Set(filteredCampaigns.map((campaign) => campaign.id));
+
+        return ads.filter((ad) => ad.campaignId !== null && campaignIds.has(ad.campaignId));
+    }, [ads, filteredCampaigns]);
+
+    return {
+        campaigns: filteredCampaigns,
+        ads: filteredAds,
+    };
+};