refactor(health): share health snapshot computation

ts/api/server.ts

@@ -16,6 +16,7 @@ import { ModelRegistry } from '../models/registry.ts';
 import { ModelLoader } from '../models/loader.ts';
 import { GpuDetector } from '../hardware/gpu-detector.ts';
 import { ClusterHandler } from './handlers/cluster.ts';
+import { buildHealthSnapshot } from '../helpers/health.ts';
 
 interface IApiServerOptions {
   gpuDetector?: GpuDetector;
@@ -209,47 +210,15 @@ export class ApiServer {
       const gpus = await this.gpuDetector.detectGpus();
       const models = await this.containerManager.getAllAvailableModels();
 
-      let status: 'ok' | 'degraded' | 'error' = 'ok';
-      const reasons = new Set<'unhealthy_container' | 'no_models_available' | 'gpu_detection_failed'>();
-      const containerHealth: Record<string, 'healthy' | 'unhealthy'> = {};
-      const gpuStatus: Record<string, 'available' | 'in_use' | 'error'> = {};
-
-      // Check container health
-      for (const [id, containerStatus] of statuses) {
-        if (containerStatus.running && containerStatus.health === 'healthy') {
-          containerHealth[id] = 'healthy';
-        } else {
-          containerHealth[id] = 'unhealthy';
-          status = 'degraded';
-          reasons.add('unhealthy_container');
-        }
-      }
-
-      // Check GPU status
-      for (const gpu of gpus) {
-        gpuStatus[gpu.id] = 'available';
-      }
-
-      if (models.size === 0) {
-        status = 'degraded';
-        reasons.add('no_models_available');
-      }
-
-      const response: IHealthResponse = {
-        status,
-        reasons: Array.from(reasons),
+      const response: IHealthResponse = buildHealthSnapshot({
+        statuses,
+        modelCount: models.size,
+        gpus,
+        startTime: this.startTime,
         version: VERSION,
-        uptime: Math.floor((Date.now() - this.startTime) / 1000),
-        containers: statuses.size,
-        models: models.size,
-        gpus: gpus.length,
-        details: {
-          containers: containerHealth,
-          gpus: gpuStatus,
-        },
-      };
+      });
 
-      res.writeHead(status === 'ok' ? 200 : 503, { 'Content-Type': 'application/json' });
+      res.writeHead(response.status === 'ok' ? 200 : 503, { 'Content-Type': 'application/json' });
       res.end(JSON.stringify(response, null, 2));
     } catch (error) {
       res.writeHead(500, { 'Content-Type': 'application/json' });