feat: add GPU monitoring support via Glances integration (#5255)

* feat: add GPU monitoring support via Glances integration

- Add GPU fields to SystemHealthMonitoring interface (gpuId, name,
  memoryUtilization, processorUtilization, temperature, fanSpeed)
- Extend Glances integration to parse GPU data from /api/4/all endpoint
  (supports NVIDIA, AMD, and Intel GPUs via Glances)
- Add GPU utilization ring to Health Monitoring widget with tooltip
  showing VRAM usage, temperature, and fan speed
- Add GPU time-series chart to System Resources widget (grape color)
- Add GPU toggle option to both widgets
- Add English translations for GPU labels
- Add gpu: [] to all other integrations (dashdot, truenas, unraid,
  openmediavault) for backward compatibility
- Add GPU mock data for development/testing

Closes community request from PR #5102 for GPU monitoring support.

* fix: implement GPU monitoring for dashdot integration and clarify OMV comment

- Add GPU load fetching via dashdot /load/gpu endpoint
- Add GPU info parsing from dashdot /info endpoint
- Add gpuLoadApi and gpu field to internalServerInfoApi schemas
- Add getCurrentGpuLoadAsync method to DashDotIntegration
- Map GPU load data to SystemHealthMonitoring gpu array
- Add explanatory comment for OMV's empty gpu array

Addresses review comments from manuel-rw on PR #5255

* Delete manifest.json

packages/integrations/src/dashdot/dashdot-integration.ts

@@ -33,6 +33,7 @@ export class DashDotIntegration extends Integration implements ISystemHealthMoni
     const memoryLoad = await this.getCurrentMemoryLoadAsync();
     const storageLoad = await this.getCurrentStorageLoadAsync();
     const networkLoad = await this.getCurrentNetworkLoadAsync();
+    const gpuLoad = await this.getCurrentGpuLoadAsync();
 
     const channel = this.getChannel();
     const history = await channel.getSliceUntilTimeAsync(dayjs().subtract(15, "minutes").toDate());
@@ -56,6 +57,14 @@ export class DashDotIntegration extends Integration implements ISystemHealthMoni
       availablePkgUpdates: 0,
       rebootRequired: false,
       smart: [], // API endpoint does not provide S.M.A.R.T data.
+      gpu: gpuLoad.map((gpu, index) => ({
+        gpuId: `gpu-${index}`,
+        name: info.gpuNames[index] ?? `GPU ${index}`,
+        memoryUtilization: gpu.memory ?? 0,
+        processorUtilization: gpu.load ?? 0,
+        temperature: null,
+        fanSpeed: null,
+      })),
       uptime: info.uptime,
       version: `${info.operatingSystemVersion}`,
       loadAverage: {
@@ -76,6 +85,7 @@ export class DashDotIntegration extends Integration implements ISystemHealthMoni
       cpuModel: serverInfo.cpu.model,
       operatingSystemVersion: `${serverInfo.os.distro} ${serverInfo.os.release} (${serverInfo.os.kernel})`,
       uptime: serverInfo.os.uptime,
+      gpuNames: serverInfo.gpu.map((gpu) => gpu.brand),
     };
   }
 
@@ -150,6 +160,17 @@ export class DashDotIntegration extends Integration implements ISystemHealthMoni
     return await networkLoadApi.parseAsync(JSON.parse(result));
   }
 
+  private async getCurrentGpuLoadAsync() {
+    const response = await fetchWithTrustedCertificatesAsync(this.url("/load/gpu"));
+    const result = await response.text();
+
+    // response is either valid json or empty if gpu widget is disabled.
+    if (result.length === 0) return [];
+
+    const data = await gpuLoadApi.parseAsync(JSON.parse(result));
+    return data.layout;
+  }
+
   private getChannel() {
     return createChannelEventHistoryOld<z.infer<typeof cpuLoadPerCoreApiList>>(
       `integration:${this.integration.id}:history:cpu`,
@@ -198,6 +219,23 @@ const internalServerInfoApi = z.object({
       ),
     }),
   ),
+  gpu: z
+    .array(
+      z.object({
+        brand: z.string(),
+        model: z.string().optional(),
+      }),
+    )
+    .default([]),
 });
 
 const cpuLoadPerCoreApiList = z.array(cpuLoadPerCoreApi);
+
+const gpuLoadApi = z.object({
+  layout: z.array(
+    z.object({
+      load: z.number().min(0).optional(),
+      memory: z.number().min(0).optional(),
+    }),
+  ),
+});

packages/integrations/src/glances/glances-integration.ts

@@ -59,6 +59,14 @@ export class GlancesIntegration extends Integration implements ISystemHealthMoni
       loadAverage: null,
       smart: [],
       cpuTemp: undefined,
+      gpu: stats.gpu.map((gpu) => ({
+        gpuId: gpu.gpu_id,
+        name: gpu.name,
+        memoryUtilization: gpu.mem ?? 0,
+        processorUtilization: gpu.proc ?? 0,
+        temperature: gpu.temperature ?? null,
+        fanSpeed: gpu.fan_speed ?? null,
+      })),
     };
   }
 
@@ -150,4 +158,16 @@ const allSchema = z.object({
   quicklook: z.object({
     cpu_name: z.string(),
   }),
+  gpu: z
+    .array(
+      z.object({
+        gpu_id: z.string(),
+        name: z.string(),
+        mem: z.number().nullable().optional(),
+        proc: z.number().nullable().optional(),
+        temperature: z.number().nullable().optional(),
+        fan_speed: z.number().nullable().optional(),
+      }),
+    )
+    .default([]),
 });

packages/integrations/src/interfaces/health-monitoring/health-monitoring-types.ts

@@ -31,6 +31,14 @@ export interface SystemHealthMonitoring {
     overallStatus: string;
     healthy: boolean;
   }[];
+  gpu: {
+    gpuId: string;
+    name: string;
+    memoryUtilization: number;
+    processorUtilization: number;
+    temperature: number | null;
+    fanSpeed: number | null;
+  }[];
 }
 
 // TODO: in the future decouple this from the Proxmox integration

packages/integrations/src/mock/data/system-health-monitoring.ts

@@ -36,6 +36,16 @@ export class SystemHealthMonitoringMockService implements ISystemHealthMonitorin
           healthy: true,
         },
       ],
+      gpu: [
+        {
+          gpuId: "mock0",
+          name: "Mock GPU RTX 4090",
+          memoryUtilization: Math.floor(Math.random() * 100),
+          processorUtilization: Math.floor(Math.random() * 100),
+          temperature: Math.floor(Math.random() * 90),
+          fanSpeed: Math.floor(Math.random() * 2000),
+        },
+      ],
     });
   }
 }

packages/integrations/src/openmediavault/openmediavault-integration.ts

@@ -86,6 +86,7 @@ export class OpenMediaVaultIntegration extends Integration implements ISystemHea
       cpuTemp: cpuTempResult.success ? cpuTempResult.data.response.cputemp : undefined,
       fileSystem,
       smart,
+      gpu: [], // OpenMediaVault does not expose GPU monitoring via its RPC API.
     };
   }
 

packages/integrations/src/truenas/truenas-integration.ts

@@ -297,6 +297,7 @@ export class TrueNasIntegration extends Integration implements ISystemHealthMoni
       version: systemInformation.version,
       cpuModelName: systemInformation.model,
       rebootRequired: false,
+      gpu: [],
     };
   }
 

packages/integrations/src/unraid/unraid-integration.ts

@@ -70,6 +70,7 @@ export class UnraidIntegration extends Integration implements ISystemHealthMonit
         // See ArrayDiskStatus from https://studio.apollographql.com/public/Unraid-API/variant/current/explorer
         healthy: disk.status === "DISK_OK",
       })),
+      gpu: [],
     };
   }