first commit

Helpers/BusinessLogoHelper.cs

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+namespace Fitness_core_BE.Helpers
+{
+    // BusinessLogoId (ClientBusiness) holds a relative /Uploads path, not a public URL — there's
+    // no static-file serving configured for it, so the only way to hand it to a client (web or
+    // mobile) is to read the bytes server-side and inline them as a base64 data URL.
+    public static class BusinessLogoHelper
+    {
+        public static async Task<string?> ReadAsDataUrlAsync(string? businessLogoId)
+        {
+            if (string.IsNullOrEmpty(businessLogoId)) return null;
+
+            string uploadsRoot = Path.GetFullPath(Path.Combine(Directory.GetCurrentDirectory(), ".."));
+            string relativePath = Uri.UnescapeDataString(businessLogoId).Replace("/", Path.DirectorySeparatorChar.ToString());
+            string filePath = uploadsRoot + relativePath;
+            if (!File.Exists(filePath)) return null;
+
+            byte[] bytes = await File.ReadAllBytesAsync(filePath);
+            string ext = Path.GetExtension(filePath).TrimStart('.').ToLowerInvariant();
+            string mime = ext == "png" ? "image/png" : ext == "webp" ? "image/webp" : "image/jpeg";
+            return $"data:{mime};base64,{Convert.ToBase64String(bytes)}";
+        }
+    }
+}