Manage a resource's services from the panel

A "سرویس‌ها" action on each resource row opens a modal listing what that
resource performs, with its own duration and price. It follows the skills modal
exactly — same PUT-replaces-everything contract, same components, no new page
and no new route.

Leaving a cell empty means inherit, so the effective value is shown as the
placeholder along with where it came from: "40 — service default", "1,800,000
toman — branch". Without that the user cannot tell an unset field from a zero,
which is the one thing this screen has to communicate.

Two backend adjustments came out of wiring it up:

- the offering filter in findEligible is now scoped to the requirement's
  resource type. Registering lasers for a service was making the room in the
  same plan ineligible and breaking the whole booking — "who performs this" is
  about the performing role, not about rooms and support resources. The seeder
  caught this immediately.
- the scenario seeder now creates offerings and resource categories, so the
  demo data exercises this model instead of leaving every resource empty.

Three vitest tests: inherited value with its source, saving an override, and
clearing back to inheritance. Verified in the browser at 1440 dark, 1440
compact and 390 mobile — the last with no horizontal scroll.

Panel suite 648 green across 98 files, tsc clean, encore build succeeds.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

assets/admin/types/index.ts

@@ -1238,3 +1238,25 @@ export interface ReportEnvelope<T> {
     to: number;
     rows: T[];
 }
+
+/** یک ردیف «این منبع این سرویس را می‌دهد» با مقدار مؤثر و منبعِ هر عدد. */
+export interface ResourceServiceOffering {
+    service_uuid: string;
+    service_name: string;
+    /** null یعنی ارث از سطح بالاتر، نه صفر */
+    duration_minutes: number | null;
+    price_rials: number | null;
+    active: boolean;
+    effective_duration_minutes: number | null;
+    effective_price_rials: number;
+    duration_source: string | null;
+    price_source: string;
+}
+
+/** گزینهٔ انتخاب سرویس در مودال منبع. */
+export interface ServiceItemOption {
+    uuid: string;
+    name: string;
+    duration_minutes?: number | null;
+    price_rials?: number | null;
+}