Implement Stop/Start trading with all (#2278)

fixes #2275

Added global Start/Stop trading; use your **player panel** to trigger
it.

<img width="370" height="540" alt="Screenshot 2025-10-23 184447"
src="https://github.com/user-attachments/assets/c3b7967e-ffdd-4f37-ba67-b60a602278ce"
/>

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
regression is found:

abodcraft1

src/core/game/PlayerImpl.ts

@@ -94,6 +94,7 @@ export class PlayerImpl implements Player {
   private relations = new Map<Player, number>();
 
   private lastDeleteUnitTick: Tick = -1;
+  private lastEmbargoAllTick: Tick = -1;
 
   public _incomingAttacks: Attack[] = [];
   public _outgoingAttacks: Attack[] = [];
@@ -689,6 +690,28 @@ export class PlayerImpl implements Player {
     this.lastDeleteUnitTick = this.mg.ticks();
   }
 
+  canEmbargoAll(): boolean {
+    // Cooldown gate
+    if (
+      this.mg.ticks() - this.lastEmbargoAllTick <
+      this.mg.config().embargoAllCooldown()
+    ) {
+      return false;
+    }
+    // At least one eligible player exists
+    for (const p of this.mg.players()) {
+      if (p.id() === this.id()) continue;
+      if (p.type() === PlayerType.Bot) continue;
+      if (this.isOnSameTeam(p)) continue;
+      return true;
+    }
+    return false;
+  }
+
+  recordEmbargoAll(): void {
+    this.lastEmbargoAllTick = this.mg.ticks();
+  }
+
   hasEmbargoAgainst(other: Player): boolean {
     return this.embargoes.has(other.id());
   }