tauri: update nsis icon

packages/tauri/src-tauri/tauri.conf.json

@@ -30,6 +30,11 @@
     "externalBin": ["sidecars/opencode-cli"],
     "macOS": {
       "entitlements": "./entitlements.plist"
+    },
+    "windows": {
+      "nsis": {
+        "installerIcon": "icons/dev/icon.ico"
+      }
     }
   }
 }

packages/tauri/src-tauri/tauri.prod.conf.json

@@ -10,7 +10,12 @@
       "icons/prod/128x128@2x.png",
       "icons/prod/icon.icns",
       "icons/prod/icon.ico"
-    ]
+    ],
+    "windows": {
+      "nsis": {
+        "installerIcon": "icons/prod/icon.ico"
+      }
+    }
   },
   "plugins": {
     "updater": {