Real AI masters: rivals, AI seats and the co-op partner play by the player's rules (imps dig, mine and claim, rooms, towers, tunnels and the attack flag); other masters are saved; portals belong to whoever claims them

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/map.rs

@@ -403,9 +403,10 @@ impl Map {
         self.portals.iter().position(|&(px, py)| x >= px && x < px + 3 && y >= py && y < py + 3)
     }
 
-    pub fn portal_owned(&self, k: usize) -> bool {
+    // whose portal k is (any master can claim one)
+    pub fn portal_owner(&self, k: usize) -> Owner {
         let (px, py) = self.portals[k];
-        self.t[idx(px, py)].owner == Owner::Player
+        self.t[idx(px, py)].owner
     }
 
     pub fn generate(seed: u32, w: usize, h: usize) -> Map {