feat(gpu-service): instance-type activate/deactivate, displayName, unified flavor display

- add activate/deactivate row actions (phase-driven) with new PUT APIs
- add displayName field; list shows displayName || name
- rename list OS column title to Platform
- share a two-line flavor renderer between the create dropdown and the list
- normalize 'CPU Only' label to 'CPU-only'

src/locales/zh-CN/gpuservice.ts

@@ -121,12 +121,15 @@ export default {
   'gpuservice.instance.ram': '内存',
   'gpuservice.instance.os': '系统',
   'gpuservice.instance.arch': '架构',
-'gpuservice.instanceType': 'GPU 实例类型',
+  'gpuservice.instanceType': 'GPU 实例类型',
   'gpuservice.instanceType.add': '添加实例类型',
   'gpuservice.instanceType.flavor': '规格',
   'gpuservice.instanceType.flavor.required': '请选择实例类型规格',
   'gpuservice.instanceType.flavor.gpuGroup': 'GPU 算力',
   'gpuservice.instanceType.flavor.cpuGroup': 'CPU 算力',
+  'gpuservice.instanceType.activate': '启用',
+  'gpuservice.instanceType.deactivate': '停用',
+  'gpuservice.instanceType.platform': '平台',
   'gpuservice.instanceType.product': '商品',
   'gpuservice.instanceType.unitCpu': '单位 CPU',
   'gpuservice.instanceType.unitCpu.tip': '每 GPU 对应多少 CPU',