feat: nation-op split/merge — apply on confirm (playerPart, fresh ids, relations union) (P4b, #16)

server/index.ts

@@ -230,10 +230,14 @@ app.post('/api/games/:id/queue/remove', (req, res) => {
   res.json({ game: next });
 });
 
-// (v0.23, #16 P4a) Resolve a pending nation-op proposal (a rename the LLM
-// proposed in an earlier turn, waiting in game.pendingNationOps). No LLM call,
-// no turn advance — same fast save → broadcast → respond order as
-// /queue/remove. The version bump lets "never go backwards" clients reconcile.
+// (v0.23, #16 P4a; v0.24, #16 P4b) Resolve a pending nation-op proposal
+// waiting in game.pendingNationOps: a rename takes effect (body.edits.name
+// may override the proposed name), a split partitions the nation's territory
+// into the proposed parts (body.edits.playerPart picks which part the player
+// leads, default 0), and a merge folds its inputs into the survivor
+// (body.edits.name may override the merged name). No LLM call, no turn
+// advance — same fast save → broadcast → respond order as /queue/remove.
+// The version bump lets "never go backwards" clients reconcile.
 app.post('/api/games/:id/nation-op/confirm', (req, res) => {
   const id = req.params.id;
   const game = db.load(id);