diff --git a/emrg/gui/main.js b/emrg/gui/main.js
index 678d778..b2a175b 100644
--- a/emrg/gui/main.js
+++ b/emrg/gui/main.js
@@ -56,10 +56,22 @@ function main() {
 
   // ── 窗口 ────────────────────────────────────────────────
 
+  // rant 2026-08-11T17:37:03：打包版曾用 Electron 默认图标（蓝色原子球）。
+  // package.json build.mac/win/linux.icon 显式指向 packaging/assets 单文件修复主图标；
+  // 这里为 Windows/Linux 窗口标题栏提供运行时图标（打包版经 extraResources 落到 resources/icon.png）。
+  function windowIconPath() {
+    const candidates = [
+      path.join(__dirname, "..", "icon.png"), // packaged: resources/icon.png（extraResources）
+      path.join(__dirname, "..", "packaging", "assets", "icon.png"), // source: 仓库 packaging/assets/icon.png
+    ];
+    return candidates.find((p) => fs.existsSync(p)) || undefined;
+  }
+
   function createWindow() {
     win = new BrowserWindow({
       width: 1000,
       height: 700,
+      icon: windowIconPath(),
       webPreferences: {
         contextIsolation: true,
         nodeIntegration: false,
diff --git a/emrg/gui/package.json b/emrg/gui/package.json
index 143d17d..e3e5328 100644
--- a/emrg/gui/package.json
+++ b/emrg/gui/package.json
@@ -28,6 +28,10 @@
       {
         "from": "../dist/runtime",
         "to": "runtime"
+      },
+      {
+        "from": "../packaging/assets/icon.png",
+        "to": "icon.png"
       }
     ],
     "files": [
@@ -41,7 +45,7 @@
       "package.json",
       "scripts/**"
     ],
-    "icon": "../packaging/assets/",
+    "icon": "../packaging/assets/icon.png",
     "mac": {
       "hardenedRuntime": true,
       "notarize": false,
@@ -54,7 +58,8 @@
           ]
         }
       ],
-      "category": "public.app-category.developer-tools"
+      "category": "public.app-category.developer-tools",
+      "icon": "../packaging/assets/icon.icns"
     },
     "win": {
       "target": [
@@ -64,7 +69,8 @@
             "x64"
           ]
         }
-      ]
+      ],
+      "icon": "../packaging/assets/icon.ico"
     },
     "linux": {
       "target": [
@@ -76,7 +82,8 @@
           "from": "../dist/runtime",
           "to": "runtime"
         }
-      ]
+      ],
+      "icon": "../packaging/assets/icon.png"
     },
     "nsis": {
       "oneClick": false,
@@ -84,4 +91,4 @@
       "perMachine": false
     }
   }
-}
\ No newline at end of file
+}