initial commit

Services/IAppLogger.cs

@@ -0,0 +1,23 @@
+namespace HC_APTBS.Services
+{
+    /// <summary>
+    /// Application-level structured logger.
+    /// Implementations write to dated files under <c>%UserProfile%\.HC_APTBS\log\</c>.
+    /// </summary>
+    public interface IAppLogger
+    {
+        /// <summary>Logs a fatal or unrecoverable error.</summary>
+        /// <param name="source">Class or component name (used as a prefix in the log line).</param>
+        /// <param name="message">Error message.</param>
+        void Error(string source, string message);
+
+        /// <summary>Logs a non-fatal warning.</summary>
+        void Warning(string source, string message);
+
+        /// <summary>Logs a normal informational message.</summary>
+        void Info(string source, string message);
+
+        /// <summary>Logs a verbose debug message.</summary>
+        void Debug(string source, string message);
+    }
+}