fix(pc-client): 主窗口下限改为 1080×680（B-171 特批仅两常量）

仅改 pc-client/electron/main/windowManage.ts 的 minWidth/minHeight。
electron/ 其余文件仍冻结。

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: multica-agent <github@multica.ai>

pc-client/electron/main/windowManage.ts

@@ -35,8 +35,8 @@ export function createMainWindow() {
     show: false,
     width: 1200,
     height: 800,
-    minWidth: 1024,
+    minWidth: 1080,
-    minHeight: 726,
+    minHeight: 680,
     titleBarStyle: "hiddenInset",
     webPreferences: {
       preload: global.pathConfig.preload,