Drag-to-reorder service cards (iOS jiggle mode)

Long-press a service tile (~500 ms) on the Services page → grid enters
edit mode: every card jiggles, a floating "تم / Done" pill appears, and
cards become draggable via @dnd-kit. Drop on another tile to reorder.
Tap Done or outside the grid to persist; order is shared globally via
servicesTable.sortOrder.

Per the task default: admin-only. Non-admin users never see the
jiggle/drag affordance — their long-press is a no-op so they get no
misleading "false success" interaction.

Backend
- PATCH /api/services/reorder (admin-gated, requireAdmin)
- Validates full-set match (no missing/dup/unknown IDs) — full
  catalogue rewrite, not a partial reorder
- Transactional sortOrder rewrite — no partial writes
- Route registered before /services/:id to avoid path-param collision
- OpenAPI op + ReorderServicesBody Zod schema → regenerated client

Frontend
- artifacts/tx-os/src/pages/services.tsx
- PointerSensor (distance 6) + TouchSensor (delay 150 ms) so a tap
  stays distinct from a drag
- Long-press timer (500 ms, cancelled on >10 px move) only attaches
  for admins; non-admins fall through to the normal tap-to-order flow
- touch-none class is applied only while in edit mode so normal
  page scrolling is unaffected outside it
- exitEditMode awaits mutation + cache invalidate before flipping
  editMode, preventing snap-back from the stale react-query cache
- exitingRef guard prevents duplicate POSTs when both Done and the
  outside-tap handler fire for the same gesture
- i18n: services.editMode.{done,hint,saveFailed} in ar.json + en.json

artifacts/api-server/src/routes/services.ts

@@ -79,7 +79,7 @@ router.get("/service-categories", requireAuth, async (_req, res): Promise<void>
 // catalogue never observes a partially-applied order. Declared BEFORE
 // the `/services/:id` routes so Express doesn't try to parse "reorder"
 // as a numeric id and return a 400 from GetServiceParams.
-router.post("/services/reorder", requireAdmin, async (req, res): Promise<void> => {
+router.patch("/services/reorder", requireAdmin, async (req, res): Promise<void> => {
   const parsed = ReorderServicesBody.safeParse(req.body);
   if (!parsed.success) {
     res.status(400).json({ error: parsed.error.message });