chore: 移除 DMG 背景图，添加 README.txt 到 DMG 根目录

.github/workflows/release.yml

@@ -70,6 +70,42 @@ jobs:
           TAURI_SIGNING_PRIVATE_KEY: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY }}
           TAURI_SIGNING_PRIVATE_KEY_PASSWORD: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY_PASSWORD }}
 
+      - name: Add README to DMG
+        run: |
+          DMG_PATH=$(ls tauri-app/src-tauri/target/universal-apple-darwin/release/bundle/dmg/*.dmg | head -1)
+          DMG_RW="/tmp/temp_rw.dmg"
+          MOUNT_POINT="/tmp/dmg_mount"
+
+          # 转换为可读写格式
+          hdiutil convert "$DMG_PATH" -format UDRW -o "$DMG_RW"
+
+          # 挂载可读写 DMG
+          mkdir -p "$MOUNT_POINT"
+          hdiutil attach "$DMG_RW" -mountpoint "$MOUNT_POINT" -nobrowse
+
+          # 复制 README.txt 到 DMG 根目录
+          cp tauri-app/src-tauri/README.txt "$MOUNT_POINT/"
+
+          # 卸载
+          hdiutil detach "$MOUNT_POINT"
+
+          # 删除原 DMG，转换回压缩只读格式
+          rm -f "$DMG_PATH"
+          hdiutil convert "$DMG_RW" -format UDZO -o "$DMG_PATH"
+
+          # 清理临时文件
+          rm -f "$DMG_RW"
+
+      - name: Re-sign DMG
+        working-directory: tauri-app
+        run: |
+          DMG_PATH=$(ls src-tauri/target/universal-apple-darwin/release/bundle/dmg/*.dmg | head -1)
+          rm -f "${DMG_PATH}.sig"
+          npx tauri signer sign -k "$TAURI_SIGNING_PRIVATE_KEY" -p "$TAURI_SIGNING_PRIVATE_KEY_PASSWORD" "$DMG_PATH"
+        env:
+          TAURI_SIGNING_PRIVATE_KEY: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY }}
+          TAURI_SIGNING_PRIVATE_KEY_PASSWORD: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY_PASSWORD }}
+
       - name: Upload artifacts
         uses: actions/upload-artifact@v4
         with: