Improve ingame moderation for admins (#3678)

## Description:

Players with the `admin` flare can now kick players from any game
(including public lobbies), not just the lobby creator in private
lobbies.

## Please complete the following:

- [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

## Please put your Discord username so you can be contacted if a bug or
regression is found:

w.o.n

tests/client/graphics/layers/PlayerPanelKick.test.ts

@@ -59,7 +59,7 @@ describe("PlayerPanel - kick player moderation", () => {
     } as unknown as PlayerView;
 
     (actionButton as unknown as ReturnType<typeof vi.fn>).mockClear();
-    (panel as any).renderModeration(my, other);
+    (panel as any).renderModeration(my, other, false);
     expect(actionButton).toHaveBeenCalledTimes(1);
     expect(
       (actionButton as unknown as ReturnType<typeof vi.fn>).mock.calls[0][0],
@@ -71,16 +71,31 @@ describe("PlayerPanel - kick player moderation", () => {
 
     (actionButton as unknown as ReturnType<typeof vi.fn>).mockClear();
     (panel as any).kickedPlayerIDs.add("2");
-    (panel as any).renderModeration(my, other);
+    (panel as any).renderModeration(my, other, false);
     expect(actionButton).toHaveBeenCalledTimes(1);
 
     const notCreator = { isLobbyCreator: () => false } as unknown as PlayerView;
     (actionButton as unknown as ReturnType<typeof vi.fn>).mockClear();
     (panel as any).kickedPlayerIDs.clear();
-    (panel as any).renderModeration(notCreator, other);
+    (panel as any).renderModeration(notCreator, other, false);
     expect(actionButton).not.toHaveBeenCalled();
   });
 
+  test("renders moderation action when isAdmin=true even if not lobby creator", () => {
+    const notCreator = { isLobbyCreator: () => false } as unknown as PlayerView;
+    const other = {
+      id: () => 2,
+      name: () => "Other",
+      displayName: () => "[TAG] Other",
+      type: () => PlayerType.Human,
+      clientID: () => "client-2",
+    } as unknown as PlayerView;
+
+    (actionButton as unknown as ReturnType<typeof vi.fn>).mockClear();
+    (panel as any).renderModeration(notCreator, other, true);
+    expect(actionButton).toHaveBeenCalledTimes(1);
+  });
+
   test("opens moderation modal and hides after a kick", () => {
     const other = {
       id: () => 2,
@@ -171,4 +186,40 @@ describe("PlayerModerationModal - kick confirmation", () => {
     expect(eventBus.emit).not.toHaveBeenCalled();
     expect(kickedListener).not.toHaveBeenCalled();
   });
+
+  describe("canKick", () => {
+    function makeModal(isAdmin: boolean) {
+      const modal = new PlayerModerationModal();
+      modal.isAdmin = isAdmin;
+      return modal;
+    }
+
+    const nonCreator = { isLobbyCreator: () => false } as unknown as PlayerView;
+    const creator = { isLobbyCreator: () => true } as unknown as PlayerView;
+    const humanOther = {
+      type: () => PlayerType.Human,
+      clientID: () => "client-other",
+    } as unknown as PlayerView;
+
+    test("admin non-creator can kick a valid other player", () => {
+      const modal = makeModal(true);
+      expect((modal as any).canKick(nonCreator, humanOther)).toBe(true);
+    });
+
+    test("non-admin non-creator cannot kick", () => {
+      const modal = makeModal(false);
+      expect((modal as any).canKick(nonCreator, humanOther)).toBe(false);
+    });
+
+    test("admin cannot kick themselves", () => {
+      const modal = makeModal(true);
+      // same object reference → other === my
+      expect((modal as any).canKick(nonCreator, nonCreator)).toBe(false);
+    });
+
+    test("lobby creator can kick a valid other player", () => {
+      const modal = makeModal(false);
+      expect((modal as any).canKick(creator, humanOther)).toBe(true);
+    });
+  });
 });