Try fixing initialization

frontend/src/core/api/crypto/sessions.ts

@@ -0,0 +1,53 @@
+/**
+ * API functions for managing Signal Protocol sessions on the server
+ */
+
+import { API_BASE_URL } from "@/core/config";
+import { getAuthHeaders } from "../user/auth";
+
+export interface SessionData {
+    recipientId: number;
+    deviceId: number;
+    encryptedData: string; // JSON string of encrypted session
+}
+
+/**
+ * Upload encrypted Signal Protocol sessions to the server
+ */
+export async function uploadSessions(sessions: SessionData[], token: string): Promise<void> {
+    const headers = getAuthHeaders(token, true);
+    
+    const payload = {
+        sessions
+    };
+
+    const res = await fetch(`${API_BASE_URL}/crypto/signal/sessions`, {
+        method: "POST",
+        headers,
+        body: JSON.stringify(payload)
+    });
+    
+    if (!res.ok) {
+        throw new Error(`Failed to upload sessions: ${res.statusText}`);
+    }
+}
+
+/**
+ * Fetch all encrypted Signal Protocol sessions from the server
+ */
+export async function fetchSessions(token: string): Promise<SessionData[]> {
+    const headers = getAuthHeaders(token, true);
+    
+    const res = await fetch(`${API_BASE_URL}/crypto/signal/sessions`, {
+        method: "GET",
+        headers
+    });
+    
+    if (!res.ok) {
+        throw new Error(`Failed to fetch sessions: ${res.statusText}`);
+    }
+    
+    const data = await res.json();
+    return data.sessions || [];
+}
+