fix: TypeScript-Fehler in wg-api.ts behoben

lib/wg-api.ts

@@ -56,9 +56,9 @@ export class WgApiClient {
   private async request<T>(endpoint: string, options: RequestInit = {}): Promise<T> {
     const url = `${this.baseUrl}${endpoint}`
     
-    const headers = {
+    const headers: Record<string, string> = {
       'Content-Type': 'application/json',
-      ...options.headers,
+      ...(options.headers as Record<string, string> || {}),
     }
 
     // Add basic auth if password is set
@@ -80,7 +80,24 @@ export class WgApiClient {
   }
 
   async getStats(): Promise<WgStats> {
-    return this.request<WgStats>('/api/sessions')
+    try {
+      return await this.request<WgStats>('/api/sessions')
+    } catch (error) {
+      // If API is not available, return empty stats
+      console.warn('WG API not available, returning empty stats:', error)
+      return {
+        clients: [],
+        server: {
+          address: '',
+          listenPort: 0,
+          publicKey: '',
+          endpoint: '',
+          dns: '',
+          allowedIPs: '',
+          createdAt: new Date().toISOString(),
+        },
+      }
+    }
   }
 
   async getClients(): Promise<WgClient[]> {
@@ -119,10 +136,13 @@ export class WgApiClient {
   }
 
   async getClientConfig(id: string): Promise<string> {
+    const headers: Record<string, string> = {}
+    if (this.password) {
+      headers['Authorization'] = `Basic ${Buffer.from(`:${this.password}`).toString('base64')}`
+    }
+    
     const response = await fetch(`${this.baseUrl}/api/users/${id}/configuration`, {
-      headers: this.password ? {
-        'Authorization': `Basic ${Buffer.from(`:${this.password}`).toString('base64')}`
-      } : {},
+      headers,
     })
     
     if (!response.ok) {
@@ -133,10 +153,13 @@ export class WgApiClient {
   }
 
   async getClientQR(id: string): Promise<string> {
+    const headers: Record<string, string> = {}
+    if (this.password) {
+      headers['Authorization'] = `Basic ${Buffer.from(`:${this.password}`).toString('base64')}`
+    }
+    
     const response = await fetch(`${this.baseUrl}/api/users/${id}/qr-code`, {
-      headers: this.password ? {
-        'Authorization': `Basic ${Buffer.from(`:${this.password}`).toString('base64')}`
-      } : {},
+      headers,
     })
     
     if (!response.ok) {