chore(desktop): centralize brand configuration

OpenWork-Sync-Mode: export

Qwen-Code-Base: 7295a1b2ff1e6c5ddcf44363f550ec5e34a29565

Qwen-Code-Commit: 076d6b519ad1242d7779304447e4c61c74ed9590

OpenWork-Base: da290c7

Author: DragonnZhang

.gitignore

@@ -7,6 +7,7 @@ dist
 *.tgz
 .build
 apps/electron/release
+apps/electron/electron-builder.generated.yml
 apps/electron/resources/session-mcp-server/
 apps/electron/resources/pi-agent-server/
 

apps/electron/electron-builder.modelstudio.yml

@@ -67,7 +67,7 @@ asar: false
 
 mac:
   category: public.app-category.productivity
-  icon: resources/icon.icns
+  icon: resources/brands/qwen-code/icon.icns
   # macOS 26+ Liquid Glass: Tell macOS to look for icon in Assets.car
   # The value must match --app-icon used in actool (see afterPack.js)
   extendInfo:
@@ -108,7 +108,7 @@ dmg:
   # Custom background (multi-resolution TIFF with 1x+2x for retina support)
   background: resources/dmg-background.tiff
   # Use app icon as the mounted volume icon in Finder
-  icon: resources/icon.icns
+  icon: resources/brands/qwen-code/icon.icns
   iconSize: 80
   title: "Qwen Code Desktop"
   contents:
@@ -123,7 +123,7 @@ dmg:
     height: 380
 
 win:
-  icon: resources/icon.ico
+  icon: resources/brands/qwen-code/icon.ico
   target:
     - target: nsis
       arch:
@@ -164,7 +164,7 @@ nsis:
   deleteAppDataOnUninstall: true
 
 linux:
-  icon: resources/icon.png
+  icon: resources/brands/qwen-code/icon.png
   category: Utility
   maintainer: "Alibaba Group"
   target: