Enhance school creation functionality by introducing support for name sets in the API and UI. Update the catalog to include skills, traits, body attributes, needs, and name sets, improving character generation capabilities. Revise localization strings for better user guidance and update tests to validate the new name set functionality and ensure robustness in school creation processes.

docs/protocol.md

@@ -69,6 +69,9 @@ Room slots include a `count` (how many of the default thing the def places). Thi
 `pupilSlots` — how many pupils that thing hosts for lessons. The create editor copies both onto
 the map instance; the snapshot's per-node pupil-slot total is computed on the server.
 
+`nameSets` is the list of placeable name packs (`defName` + label). The create dialog picks one;
+it is independent of the UI language.
+
 `lang` is the same value Hello carries — not `Accept-Language`. Anything other than `en` is
 Russian.
 
@@ -81,12 +84,15 @@ Body:
   "name": "Гимназия №14",
   "startDate": "2012-04-03T06:00:00Z",
   "modIds": [],
-  "map": null
+  "map": null,
+  "nameSetId": "Slavic"
 }
 ```
 
 `modIds` are extras; the server always prepends `core`. Omit `map` (or send `null`) to use that
 pack set's default layout. A supplied map is validated as a connected yard-and-rooms graph.
+`nameSetId` is a `NameSetDef`; omit it to use the first placeable set in the catalog (vanilla:
+`Slavic`). Unknown ids return `400` `unknown-name-set`.
 
 | Status | Meaning |
 | --- | --- |
@@ -96,6 +102,7 @@ pack set's default layout. A supplied map is validated as a connected yard-and-r
 | `400` `invalid-map` | Missing yard, no rooms, unknown def, or a disconnected graph. |
 | `400` `unknown-mod` | An extra pack id is missing under `mods/`. |
 | `400` `invalid-catalog` | The selected packs could not be loaded. |
+| `400` `unknown-name-set` | `nameSetId` is not a placeable `NameSetDef` in those packs. |
 | `409` `school-limit-reached` | `maxSchools` schools already exist. |
 
 Failures are RFC 7807 problem details with an extra `code` field — that is what the UI switches on.