Show parent > child location on detail pages, add location move

- Device/component detail pages show "Parent › Child" for locations
- Device list cards show full location path
- Location edit form now includes a Parent selector to move locations
  between parents or make them top-level
- Prevents setting a location as its own parent

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/routes/(app)/devices/+page.server.ts

@@ -47,7 +47,8 @@ export const load: PageServerLoad = async ({ url }) => {
 			model: devices.model,
 			condition: devices.condition,
 			year: devices.year,
-			locationName: locations.name
+			locationName: locations.name,
+			locationParentId: locations.parentId
 		})
 		.from(devices)
 		.leftJoin(locations, eq(devices.locationId, locations.id))
@@ -56,6 +57,17 @@ export const load: PageServerLoad = async ({ url }) => {
 		.limit(pageSize)
 		.offset((page - 1) * pageSize);
 
+	// Resolve parent location names
+	const parentIds = [...new Set(deviceList.filter(d => d.locationParentId).map(d => d.locationParentId!))];
+	let parentNameMap: Record<string, string> = {};
+	if (parentIds.length > 0) {
+		const parents = await db
+			.select({ id: locations.id, name: locations.name })
+			.from(locations)
+			.where(sql`${locations.id} IN ${parentIds}`);
+		for (const p of parents) parentNameMap[p.id] = p.name;
+	}
+
 	// Fetch first image for each device
 	const deviceIds = deviceList.map((d) => d.id);
 	let imageMap: Record<string, string> = {};
@@ -80,7 +92,12 @@ export const load: PageServerLoad = async ({ url }) => {
 	return {
 		devices: deviceList.map((d) => ({
 			...d,
-			thumbnail: imageMap[d.id] ?? null
+			thumbnail: imageMap[d.id] ?? null,
+			fullLocation: d.locationName
+				? (d.locationParentId && parentNameMap[d.locationParentId]
+					? `${parentNameMap[d.locationParentId]} › ${d.locationName}`
+					: d.locationName)
+				: null
 		})),
 		total,
 		page,