Support staged group Emperor aid

game/engine.ts

@@ -16060,6 +16060,14 @@ function coalitionFundingAvailable(g: Game, p: Player, committedBid = false): bo
   const group = coalitionRule(() => coalitionOf(g.players, g.coalitionState, p.id));
   return group?.members.length === 3;
 }
+function coalitionEmperorGroup(g: Game, p: Player) {
+  if (!g.coalitionState || p.faction !== 'emperor' || g.status !== 'playing' || g.advanced ||
+    g.expansions.length || g.homeworlds || g.nexusCards || g.leaderSkills || g.techTokens ||
+    g.strongholdCards || g.ecazTreachery || g.discoveryEnabled ||
+    !g.players.every(seat => ['atreides', 'beneGesserit', 'emperor', 'fremen', 'guild', 'harkonnen'].includes(seat.faction))) return null;
+  const group = coalitionRule(() => coalitionOf(g.players, g.coalitionState, p.id));
+  return group?.members.length === 3 ? group : null;
+}
 function guildGroupAlly(g: Game, p: Player): boolean {
   return coalitionRule(() => groupGuildShipmentRate(g.players, p.id, g.coalitionState));
 }
@@ -44640,11 +44648,12 @@ function applyActionInner(
     return g;
   }
   if (t === 'emperorGift' || t === 'emperorRevival') {
-    requireRule(
-      p.faction === 'emperor' && p.ally,
-      'Only the Emperor may use this power for an ally.',
-    );
-    const recipient = getPlayer(g, p.ally);
+    const group = coalitionEmperorGroup(g, p);
+    const recipientId = group ? stringField(action.target) : p.ally;
+    requireRule(p.faction === 'emperor' && recipientId &&
+      (group ? recipientId !== id && group.members.includes(recipientId) : recipientId === p.ally),
+      'Only the Emperor may use this power for an ally.');
+    const recipient = getPlayer(g, recipientId);
     if (t === 'emperorRevival') {
       requireRule(
         !revivalPrevented(g, recipient.id),
@@ -44685,7 +44694,7 @@ function applyActionInner(
     );
     if (t === 'emperorRevival')
       requireRule(
-        p.spice >= paidForceRevivalCost(recipient, amount, elite),
+        uncommittedSpice(g, p) >= paidForceRevivalCost(recipient, amount, elite),
         'Not enough spice for these extra revivals.',
       );
     if (liveShipmentPromises(g.shipmentPromises ?? [], p.id, g.turn).length ||
@@ -47019,6 +47028,11 @@ export function viewGame(state: Game, id: string, now?: number) {
             ? g.aid[me.ally].amount
             : 0,
     },
+    coalitionEmperor: (() => {
+      const group = coalitionEmperorGroup(g, me);
+      return group ? {allies: group.members.filter(member => member !== id),
+        availableSpice: Math.max(0, uncommittedSpice(g, me))} : null;
+    })(),
     coalitionFunding: coalitionFundingAvailable(g, me) ? (() => {
       const group = coalitionRule(() => coalitionOf(g.players, g.coalitionState, id))!;
       const pledges = g.coalitionEscrow!.pledges;