[verified] review fixes: priority arbitration, wildcard config, dead code

- CheckReactions: collect all claims, pick highest priority (win>kong>pung>chi)
- Deal(): read wildcardCount from DSL config instead of hardcoded 4
- CheckTing(): propagate wildcardCount + require258Pair to CheckWin
- ThirteenOrphans: fix neededForPair formula (extra>0?0:1)
- Remove FanConfig.Get() dead code
- Fill empty 全不靠 test body

RuleEngine/Patterns/MeldsSolver.cs

@@ -9,8 +9,6 @@ public class FanConfig
     public int Level { get; set; }
     public List<string> Excludes { get; set; } = new();
     public List<string> Conflicts { get; set; } = new();
-
-    public FanConfig Get(string name) => throw new NotImplementedException("Use dictionary lookup");
 }
 
 public class MeldsSolver
@@ -377,12 +375,9 @@ public class MeldsSolver
 
         int unique = PopCount(present);
         int missing = 13 - unique;
-        // Need: enough wildcards to fill missing tiles + 1 more for the duplicate
+        // Need wildcards for: missing unique tiles + 1 for the pair (if no duplicate exists)
         int neededForMissing = missing;
-        // Extra: we need 14 tiles = 13 unique + 1 duplicate
-        // If extra > 0, we already have the duplicate
-        // If extra == 0 and wildcards cover missing + 1 for pair
-        int neededForPair = (extra > 0 || missing > 0) ? 0 : 1;
+        int neededForPair = extra > 0 ? 0 : 1;  // duplicate already present → no pair wildcard needed
         int totalNeeded = neededForMissing + neededForPair;
 
         if (totalNeeded <= wildcardCount)