[修正] single-file publish WebUI 路徑 + 補齊 .gitignore

- AppPaths 改用 Environment.ProcessPath 取得 EXE 實際位置
- .gitignore 新增 SDK/CSharp bin/obj、Server.Tests、pptx、temp scripts

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Reymer

.gitignore

@@ -127,3 +127,14 @@ Assets/DevKit.meta
 # Server publish output
 publish/
 EdgeLink-*.zip
+
+# Build artifacts
+SDK/CSharp/**/bin/
+SDK/CSharp/**/obj/
+Server.Tests/bin/
+Server.Tests/obj/
+
+# Temp scripts & presentations
+*.pptx
+add_slide.py
+simulate_firmware.py

Server/Infrastructure/AppPaths.cs

@@ -2,9 +2,11 @@ namespace EdgeLink.Infrastructure;
 
 public static class AppPaths
 {
-    // 執行檔所在目錄（等同 Unity 的專案根目錄）
+    // 執行檔所在目錄（single-file publish 下用 ProcessPath，否則 BaseDirectory）
     public static string Root { get; } =
-        Path.GetFullPath(AppContext.BaseDirectory);
+        Path.GetFullPath(
+            Path.GetDirectoryName(Environment.ProcessPath ?? AppContext.BaseDirectory)
+            ?? AppContext.BaseDirectory);
 
     // 設定檔目錄：<exe目錄>/Setting/
     public static string SettingDir { get; } =