Implemented admin assign unit UI

ui/src/api/units.ts

@@ -12,4 +12,15 @@ export async function getUnits(): Promise<Unit[]> {
         throw new Error("Failed to fetch units");
     }
     return response.json();
+}
+
+export async function adminAssignUnit(member: number, unit: number, reason: string) {
+    const response = await fetch(`${addr}/memberUnits/admin?memberId=${member}&unitId=${unit}&reason=${encodeURIComponent(reason)}`, {
+        method: 'POST',
+        credentials: 'include'
+    });
+    if (!response.ok) {
+        throw new Error("Failed to assign unit");
+    }
+    return;
 }