feat: partner-campaign integration in admin UI

- Add partner badge to campaigns list
- Add partner selector dropdown in campaign edit
- Support ?partnerId= query param in campaign create (replaces separate page)
- Filter already-assigned campaigns in partner assign flow
- Show taken campaigns greyed out with partner name
- Delete AdminPartnerCampaignCreate (replaced by query param approach)
- Add partner translations (ru, en, zh, fa)

src/api/campaigns.ts

@@ -17,6 +17,8 @@ export interface CampaignListItem {
   registrations_count: number;
   total_revenue_kopeks: number;
   conversion_rate: number;
+  partner_user_id: number | null;
+  partner_name: string | null;
   created_at: string;
 }
 
@@ -40,6 +42,8 @@ export interface CampaignDetail {
   tariff_id: number | null;
   tariff_duration_days: number | null;
   tariff: TariffInfo | null;
+  partner_user_id: number | null;
+  partner_name: string | null;
   created_by: number | null;
   created_at: string;
   updated_at: string | null;
@@ -59,6 +63,7 @@ export interface CampaignCreateRequest {
   subscription_squads?: string[];
   tariff_id?: number;
   tariff_duration_days?: number;
+  partner_user_id?: number | null;
 }
 
 export interface CampaignUpdateRequest {
@@ -73,6 +78,7 @@ export interface CampaignUpdateRequest {
   subscription_squads?: string[];
   tariff_id?: number;
   tariff_duration_days?: number;
+  partner_user_id?: number | null;
 }
 
 export interface CampaignToggleResponse {
@@ -159,6 +165,12 @@ export interface TariffListItem {
   device_limit: number;
 }
 
+export interface AvailablePartner {
+  user_id: number;
+  username: string | null;
+  first_name: string | null;
+}
+
 export const campaignsApi = {
   // Get campaigns overview
   getOverview: async (): Promise<CampaignsOverview> => {
@@ -240,4 +252,10 @@ export const campaignsApi = {
     const response = await apiClient.get('/cabinet/admin/campaigns/available-tariffs');
     return response.data;
   },
+
+  // Get available partners for campaign assignment
+  getAvailablePartners: async (): Promise<AvailablePartner[]> => {
+    const response = await apiClient.get('/cabinet/admin/campaigns/available-partners');
+    return response.data;
+  },
 };