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/pages/gpu-service/instances/components/instance-type-item.tsx

@@ -115,7 +115,7 @@ function getInstanceDerived(item: InstanceTypeItemModel) {
     acceleratable,
     isGPU: acceleratable,
     manufacturer: acceleratable ? spec.manufacturer || '' : 'cpu', // GPU manufacturer or 'cpu' for non-acceleratable types
-    displayName: acceleratable ? spec.product || item.name : 'CPU Only',
+    displayName: acceleratable ? spec.product || item.name : 'CPU-only',
     ramUnit: spec.unitResourcesParsed?.ram?.value,
     os: _.capitalize(spec.os) || '',
     arch: spec.arch,

src/pages/gpu-service/instances/utils/render-instance-type.tsx

@@ -131,7 +131,7 @@ export const renderInstanceType = (
     // Types breakdown only wants CPU + RAM, for example.
     categories?: SpecCategory[];
     // Override the primary label (default: derived "<product> x <count>" /
-    // "CPU Only"). The Instance Types breakdown keeps its plain product name.
+    // "CPU-only"). The Instance Types breakdown keeps its plain product name.
     title?: string;
   }
 ) => {
@@ -148,7 +148,7 @@ export const renderInstanceType = (
       ? isSliced
         ? `${description.product} (${sliceMemoryPercentage}%)`
         : `${description.product} x ${accelerator}`
-      : 'CPU Only');
+      : 'CPU-only');
 
   const volume = (record.spec as any)?.volume;
   // Spec popover grouped by category (GPU / CPU / Memory / Disk), mirroring
@@ -251,7 +251,7 @@ const mibToGiQuantity = (mib?: number): string | undefined =>
 export interface InstanceTypeMiB {
   name?: string;
   product?: string;
-  // accelerator (GPU card) count; 0/undefined → CPU-only ("CPU Only").
+  // accelerator (GPU card) count; 0/undefined → CPU-only.
   gpuCount?: number;
   // Per-card values.
   unitCpuMilli?: number;