fix(addressing): accept device UUID as device_slug in SdPath

The frontend VolumesGroup was sending volume.device_id (UUID) instead
of device.slug when constructing Physical SdPaths. This caused
as_local_path() and is_local() to return false, breaking ephemeral
volume browsing ("Location root path is not local").

Backend: SdPath::is_current_device() now accepts slug, UUID, or "local".
Frontend: VolumesGroup.tsx looks up the Device by ID and uses device.slug.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

core/src/domain/addressing.rs

@@ -199,13 +199,21 @@ impl SdPath {
 		}
 	}
 
+	/// Check if the given device_slug refers to this device.
+	/// Accepts the slug, the UUID string, or the "local" placeholder.
+	fn is_current_device(device_slug: &str) -> bool {
+		device_slug == "local"
+			|| device_slug == get_current_device_slug()
+			|| device_slug == get_current_device_id().to_string()
+	}
+
 	/// Check if this path is on the current device
 	pub fn is_local(&self) -> bool {
 		match self {
-			Self::Physical { device_slug, .. } => *device_slug == get_current_device_slug(),
-			Self::Cloud { .. } => false,   // Cloud paths are never local
-			Self::Content { .. } => false, // Content paths are abstract, not inherently local
-			Self::Sidecar { .. } => false, // Sidecar paths are abstract, must be resolved
+			Self::Physical { device_slug, .. } => Self::is_current_device(device_slug),
+			Self::Cloud { .. } => false,
+			Self::Content { .. } => false,
+			Self::Sidecar { .. } => false,
 		}
 	}
 
@@ -213,8 +221,7 @@ impl SdPath {
 	pub fn as_local_path(&self) -> Option<&Path> {
 		match self {
 			Self::Physical { device_slug, path } => {
-				// "local" is a special placeholder from the frontend meaning "current device"
-				if *device_slug == "local" || *device_slug == get_current_device_slug() {
+				if Self::is_current_device(device_slug) {
 					Some(path)
 				} else {
 					None

packages/interface/src/components/SpacesSidebar/VolumesGroup.tsx

@@ -1,6 +1,6 @@
 import {EyeSlash, Plugs, WifiSlash} from '@phosphor-icons/react';
 import {getVolumeIcon, useNormalizedQuery} from '@sd/ts-client';
-import type {Volume} from '@sd/ts-client';
+import type {Device, Volume} from '@sd/ts-client';
 import {useNavigate} from 'react-router-dom';
 import {GroupHeader} from './GroupHeader';
 import {SpaceItem} from './SpaceItem';
@@ -29,9 +29,13 @@ const getVolumeIndicator = (volume: Volume) => (
 );
 
 // Component for individual volume items with context menu
-function VolumeItem({volume, index, volumesLength}: {volume: Volume; index: number; volumesLength: number}) {
+function VolumeItem({volume, index, volumesLength, devices}: {volume: Volume; index: number; volumesLength: number; devices: Device[]}) {
 	const contextMenu = useVolumeContextMenu({volume});
 
+	// Look up the device by ID to get the slug (not the UUID)
+	const device = devices.find((d) => d.id === volume.device_id);
+	const deviceSlug = device?.slug || 'local';
+
 	return (
 		<SpaceItem
 			key={volume.id}
@@ -47,7 +51,7 @@ function VolumeItem({volume, index, volumesLength}: {volume: Volume; index: numb
 				} as any
 			}
 			volumeData={{
-				device_slug: volume.device_id,
+				device_slug: deviceSlug,
 				mount_path: volume.mount_point || '/'
 			}}
 			rightComponent={getVolumeIndicator(volume)}
@@ -72,7 +76,14 @@ export function VolumesGroup({
 		resourceType: 'volume'
 	});
 
+	const {data: devicesData} = useNormalizedQuery<any, Device[]>({
+		query: 'devices.list',
+		input: {include_offline: true, include_details: false},
+		resourceType: 'device'
+	});
+
 	const volumes = volumesData?.volumes || [];
+	const devices = (devicesData as Device[]) || [];
 
 	return (
 		<div>
@@ -98,6 +109,7 @@ export function VolumesGroup({
 								volume={volume}
 								index={index}
 								volumesLength={volumes.length}
+								devices={devices}
 							/>
 						))
 					)}