fix(meteor): resolve action messages for child devices via parent studio

- Fall back to parent device studioAndConfigId when the target device has none
- Matches the existing setStatus lookup pattern for subdevices like casparcg0

Author: rjmunro

meteor/server/api/__tests__/peripheralDevice.resolveActionResult.test.ts

@@ -158,6 +158,41 @@ describe('resolveActionResult', () => {
 		expect(resolved).toBe(result)
 	})
 
+	it('resolves messages for child devices via the parent studio', async () => {
+		const parentDeviceId = protectString<PeripheralDeviceId>('parent0')
+		jest.spyOn(PeripheralDevices, 'findOneAsync').mockImplementation(async (id) => {
+			if (id === deviceId) {
+				return {
+					name: 'casparcg0',
+					parentDeviceId,
+				} as any
+			}
+			if (id === parentDeviceId) {
+				return {
+					studioAndConfigId: { studioId, configId: 'config0' },
+				} as any
+			}
+			return undefined
+		})
+		jest.spyOn(Studios, 'findOneAsync').mockResolvedValue({ blueprintId: 'blueprint0' } as any)
+		jest.spyOn(Blueprints, 'findOneAsync').mockResolvedValue({
+			_id: 'blueprint0',
+			name: 'test',
+			code: '',
+		} as any)
+		mockEvalBlueprint.mockReturnValue({
+			deviceActionMessages: {
+				[ACTION_ERROR_CODE]: 'Failed to trigger graphics at {{url}}: {{errorMessage}}',
+			},
+		} as any)
+
+		const resolved = await resolveActionResult(deviceId, makeErrorResult())
+
+		expect(resolved.response).toEqual({
+			key: 'Failed to trigger graphics at http://graphics/api: connection refused',
+		})
+	})
+
 	it('returns the original result when the device has no studio', async () => {
 		jest.spyOn(PeripheralDevices, 'findOneAsync').mockResolvedValue({
 			name: 'Playout Gateway',

meteor/server/api/peripheralDevice.ts

@@ -220,12 +220,23 @@ export async function resolveActionResult(
 
 	try {
 		const device = (await PeripheralDevices.findOneAsync(deviceId, {
-			projection: { name: 1, studioAndConfigId: 1 },
-		})) as Pick<PeripheralDevice, 'name' | 'studioAndConfigId'> | undefined
+			projection: { name: 1, studioAndConfigId: 1, parentDeviceId: 1 },
+		})) as Pick<PeripheralDevice, 'name' | 'studioAndConfigId' | 'parentDeviceId'> | undefined
 
-		if (!device?.studioAndConfigId?.studioId) return result
+		if (!device) return result
 
-		const studioBlueprint = await getStudioBlueprintManifest(device.studioAndConfigId.studioId)
+		// Child devices (like casparcg0) don't have studioAndConfigId directly - get it from parent
+		let studioId = device.studioAndConfigId?.studioId
+		if (!studioId && device.parentDeviceId) {
+			const parentDevice = await PeripheralDevices.findOneAsync(device.parentDeviceId, {
+				projection: { studioAndConfigId: 1 },
+			})
+			studioId = parentDevice?.studioAndConfigId?.studioId
+		}
+
+		if (!studioId) return result
+
+		const studioBlueprint = await getStudioBlueprintManifest(studioId)
 		if (!studioBlueprint) return result
 
 		const { blueprint, manifest: blueprintManifest } = studioBlueprint