feat: nation-op rename review — confirm/reject routes, client dialog, AGENTS.md (P4a, #16)

Wire the 'LLM proposes, player confirms' nation-rename flow end to end:
- server: POST /api/games/:id/nation-op/confirm|reject (404/400, version-bumped SSE state)
- client: confirmNationOp/rejectNationOp api helpers + NationOpDialog (editable rename) wired into the Action panel via a 'Nation proposals' trigger
- AGENTS.md: document the pendingNationOps mechanism, routes, nationRef resolution, stub-never-proposes

src/components/ActionPanel.tsx

@@ -1,5 +1,5 @@
 import { useState } from 'react';
-import { Loader2, MessageSquare, Radar, Trash2, Zap } from 'lucide-react';
+import { Loader2, MessageSquare, PenLine, Radar, Trash2, Zap } from 'lucide-react';
 import { Badge } from './ui/badge';
 import { Button } from './ui/button';
 import { Card, CardContent, CardHeader, CardTitle } from './ui/card';
@@ -15,6 +15,7 @@ import { Input } from './ui/input';
 import { Textarea } from './ui/textarea';
 import { Tabs, TabsContent, TabsList, TabsTrigger } from './ui/tabs';
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from './ui/select';
+import NationOpDialog from './NationOpDialog';
 import type { GameState, RoundItem } from '@shared/types';
 
 interface Props {
@@ -27,6 +28,11 @@ interface Props {
    * never disable "Jump forward" or the rest of the turn flow.
    */
   advisorBusy: boolean;
+  /**
+   * A pending nation-op confirm/reject request is in flight. Distinct from
+   * `busy`: it gates only the nation-op dialog controls, never the turn flow.
+   */
+  opBusy: boolean;
   /** Advisor brainstorm suggestions from the last request. */
   advisors: string[];
   /** Queue a free-text action onto the pending round (no turn advance). */
@@ -38,6 +44,10 @@ interface Props {
   onAdvisor: (prompt?: string) => void;
   /** Commit the whole pending round in a single LLM turn. */
   onJump: () => void;
+  /** Apply a pending nation op; `edits.name` optionally overrides a rename. */
+  onConfirmNationOp: (index: number, edits?: { name?: string }) => void;
+  /** Drop (reject) a pending nation op by its index. */
+  onRejectNationOp: (index: number) => void;
   /**
    * Render without the outer card chrome (the surrounding floating window
    * provides the border and the "Your move" title). Same content, same testids.
@@ -66,12 +76,15 @@ export default function ActionPanel({
   game,
   busy,
   advisorBusy,
+  opBusy,
   advisors,
   onAddAction,
   onAddDiplomacy,
   onRemoveQueueItem,
   onAdvisor,
   onJump,
+  onConfirmNationOp,
+  onRejectNationOp,
   inWindow = false,
 }: Props) {
   const [tab, setTab] = useState('action');
@@ -81,6 +94,8 @@ export default function ActionPanel({
   const [prompt, setPrompt] = useState('');
   // Index of the queued item the user is about to remove, or null (dialog closed).
   const [confirmRemoveIndex, setConfirmRemoveIndex] = useState<number | null>(null);
+  // Whether the nation-op review dialog is open.
+  const [opDialogOpen, setOpDialogOpen] = useState(false);
 
   const others = Object.entries(game.nations)
     .filter(([id]) => id !== game.playerNationId)
@@ -108,6 +123,7 @@ export default function ActionPanel({
   };
 
   const pending = game.pending;
+  const ops = game.pendingNationOps;
   // The item the confirmation dialog is about (re-derived from the live list,
   // so if the queue changes while the dialog is open it tracks the current
   // item at that index — or the dialog closes if the index went out of range).
@@ -325,6 +341,31 @@ export default function ActionPanel({
           </DialogContent>
         </Dialog>
 
+        {/* Pending nation ops proposed by the model — open to confirm or reject. */}
+        {ops.length > 0 && (
+          <button
+            type="button"
+            onClick={() => setOpDialogOpen(true)}
+            disabled={busy}
+            data-testid="nation-op-trigger"
+            className="flex w-full items-center justify-between gap-2 rounded-lg border border-amber-500/30 bg-amber-500/10 p-2.5 text-sm hover:bg-amber-500/15"
+          >
+            <span className="flex items-center gap-2 font-medium text-amber-300">
+              <PenLine className="size-4" />
+              {ops.length} nation {ops.length === 1 ? 'proposal' : 'proposals'} — review
+            </span>
+            <span className="text-xs text-amber-300/70">confirm or reject</span>
+          </button>
+        )}
+        <NationOpDialog
+          game={game}
+          open={opDialogOpen}
+          onOpenChange={setOpDialogOpen}
+          opBusy={opBusy}
+          onConfirm={onConfirmNationOp}
+          onReject={onRejectNationOp}
+        />
+
         <Button className="h-11 w-full" onClick={onJump} disabled={busy} data-testid="jump-forward">
           {busy ? <Loader2 className="size-4 animate-spin" /> : <Radar className="size-4" />}
           {queuedLabel}