feat: Stripe-style filter bar for freight backoffice (pilot: contracts)

Replace the ad-hoc filter controls with a URL-linkable pill filter bar:
each filter is a pill that opens a type-aware popover (text/enum/date/
number/boolean, each with the right operator set), overflow filters live
behind a searchable "More filters" menu, sorting is a separate control,
and filter state round-trips through the URL query string (shareable,
back/forward-safe, backward compatible with existing ?statuses=A,B links).

Frontend (apps/edr-freight-web/backoffice/src/components/filters/):
- FilterDef schema + a pure url.ts codec (parse/serialize/toApiParams),
  with a 24-case round-trip + malformed-input test suite
- useFilters hook driving react-query params straight from useSearchParams,
  debounced search, saved views in localStorage (@mantine/hooks
  useLocalStorage), page-reset-on-filter-change baked into one
  setSearchParams call instead of a separate effect
- FilterBar/FilterPill/OperatorSelect/MoreFiltersMenu/SortControl +
  per-type popover bodies (Mantine)
- ContractRequestsPage migrated end to end as the pilot

Backend (apps/edr-freight-api):
- pagination.util: applySort() — whitelisted sortBy resolved against a
  per-module column map (never interpolated), with a mandatory `id ASC`
  tiebreaker so paginating a non-unique sort can't drop/duplicate rows
- facets.util: computeFacets() — one GROUP BY per enum column, each
  omitting its own predicate, so picking a value doesn't hide its siblings
- contracts/bookings: list-summary now returns real filter-scoped facet
  counts (contracts' getStatusCounts was unfiltered/global; superseded)
- deleted drivers/vehicles findAllWithFilters — dead code that
  interpolated an unwhitelisted sortBy straight into orderBy()
- migration: missing bookings(status)/wagons(status) indexes +
  (created_at DESC, id ASC) partials on the hot list tables

UI polish pass: inactive pill uses the opaque "default" variant instead
of a faint tinted outline, active pill uses "light" not "filled", larger
X hit target, applied filters sort first, sort control separated behind
a divider on the right and wraps independently from the filter row,
popover option rows are fully clickable (count moved inside the native
label) with bigger hit area and font, fixed a real date-filter bug where
the calendar's own portal falsely registered as an "outside click" and
closed the popover, and fixed a timezone bug where bare YYYY-MM-DD
strings were parsed as UTC instead of local time (shifts a day for EAT).

Not in this commit: rollout to the other ~59 list pages, the Ethiopian-
calendar DateBody branch, and the Family-B (client-side) bridge mode —
tracked in the filter-bar plan.

apps/edr-freight-api/src/modules/vehicles/vehicles.repository.ts

@@ -21,52 +21,6 @@ export class VehiclesRepository extends BaseRepository<Vehicle> {
     return this.repository.findOne({ where: { id } });
   }
 
-  async findAllWithFilters(query: {
-    page?: number;
-    pageSize?: number;
-    search?: string;
-    status?: string;
-    sortBy?: string;
-    sortOrder?: 'ASC' | 'DESC';
-  }) {
-    const page = query.page || 1;
-    const pageSize = query.pageSize || 10;
-    const skip = (page - 1) * pageSize;
-
-    let queryBuilder = this.repository.createQueryBuilder('vehicle');
-
-    if (query.search) {
-      queryBuilder = queryBuilder.where(
-        '(vehicle.plateNumber ILIKE :search OR vehicle.manufacturer ILIKE :search OR vehicle.model ILIKE :search)',
-        { search: `%${query.search}%` },
-      );
-    }
-
-    if (query.status) {
-      queryBuilder = queryBuilder.andWhere('vehicle.status = :status', {
-        status: query.status,
-      });
-    }
-
-    const sortBy = query.sortBy || 'createdAt';
-    const sortOrder = query.sortOrder || 'DESC';
-
-    queryBuilder = queryBuilder
-      .orderBy(`vehicle.${sortBy}`, sortOrder)
-      .skip(skip)
-      .take(pageSize);
-
-    const [data, total] = await queryBuilder.getManyAndCount();
-
-    return {
-      data,
-      total,
-      page,
-      pageSize,
-      totalPages: Math.ceil(total / pageSize),
-    };
-  }
-
   async createVehicle(vehicleData: Partial<Vehicle>): Promise<Vehicle> {
     const vehicle = this.repository.create(vehicleData);
     return this.repository.save(vehicle);