Initial Dansori EQ workspace

src/DansoriEQ.App/Apo/ApoLocator.cs

@@ -0,0 +1,26 @@
+// PRE-GENERATED (design session). Locates the Equalizer APO config dir via default paths.
+// Dev session may add a registry lookup (HKLM\SOFTWARE\EqualizerAPO) for robustness.
+using System;
+using System.IO;
+
+namespace DansoriEQ.App.Apo;
+
+public static class ApoLocator
+{
+    public static string? FindConfigDir()
+    {
+        foreach (var pf in new[]
+        {
+            Environment.GetFolderPath(Environment.SpecialFolder.ProgramFiles),
+            Environment.GetFolderPath(Environment.SpecialFolder.ProgramFilesX86)
+        })
+        {
+            if (string.IsNullOrEmpty(pf)) continue;
+            var dir = Path.Combine(pf, "EqualizerAPO", "config");
+            if (Directory.Exists(dir)) return dir;
+        }
+        return null;
+    }
+
+    public static bool IsInstalled => FindConfigDir() != null;
+}