feat(dashboard): 新增生肖转移概率表格

在控制台页面转移概率区域新增生肖（12生肖）转移概率矩阵，与现有
的区域转移和波色转移保持一致的展示风格。

application/admin/model/History.php

@@ -467,7 +467,8 @@ class History extends Model
             'heatmap' => $this->getSpecialHeatmap($periods),
             'zonetransition' => $this->getZoneTransition($periods),
             'colorwavetransition' => $this->getColorWaveTransition($periods),
-            'zonetocolortransition' => $this->getZoneToZoneColor($periods)
+            'zonetocolortransition' => $this->getZoneToZoneColor($periods),
+            'zodiactransition' => $this->getZodiacTransition($periods)
         ];
     }
 
@@ -796,6 +797,70 @@ class History extends Model
         ];
     }
 
+    /**
+     * 生肖转移概率统计
+     * 统计特码从一种生肖转移到另一种生肖的概率（12生肖）
+     * @param int $periods 查询最近多少期
+     * @return array {animals: [], matrix: [], probabilities: [], row_totals: [], total_transitions: int}
+     */
+    public function getZodiacTransition($periods = 100)
+    {
+        $history = $this
+            ->field('expect,num7,openTime')
+            ->order('openTime', 'desc')
+            ->limit($periods)
+            ->select();
+
+        if (empty($history) || count($history) < 2) {
+            return ['animals' => ['鼠','牛','虎','兔','龙','蛇','马','羊','猴','鸡','狗','猪'], 'matrix' => [], 'probabilities' => [], 'row_totals' => [], 'total_transitions' => 0];
+        }
+
+        $history = array_reverse($history);
+        $num_model = new Num();
+        $animalMap = $num_model->column('animal', 'num');
+
+        $animalLabels = ['鼠', '牛', '虎', '兔', '龙', '蛇', '马', '羊', '猴', '鸡', '狗', '猪'];
+        $numAnimals = 12;
+        $matrix = array_fill(0, $numAnimals, array_fill(0, $numAnimals, 0));
+        $rowTotals = array_fill(0, $numAnimals, 0);
+
+        $getAnimalIdx = function ($num) use ($animalMap, $animalLabels) {
+            $animal = $animalMap[$num] ?? '';
+            $idx = array_search($animal, $animalLabels);
+            return $idx === false ? -1 : $idx;
+        };
+
+        $totalTransitions = 0;
+        for ($i = 0; $i < count($history) - 1; $i++) {
+            $currentNum = (int)$history[$i]['num7'];
+            $nextNum = (int)$history[$i + 1]['num7'];
+            $from = $getAnimalIdx($currentNum);
+            $to = $getAnimalIdx($nextNum);
+            if ($from < 0 || $to < 0) continue;
+
+            $matrix[$from][$to]++;
+            $rowTotals[$from]++;
+            $totalTransitions++;
+        }
+
+        $probabilities = array_fill(0, $numAnimals, array_fill(0, $numAnimals, 0));
+        for ($i = 0; $i < $numAnimals; $i++) {
+            if ($rowTotals[$i] > 0) {
+                for ($j = 0; $j < $numAnimals; $j++) {
+                    $probabilities[$i][$j] = round($matrix[$i][$j] / $rowTotals[$i] * 100, 1);
+                }
+            }
+        }
+
+        return [
+            'animals' => $animalLabels,
+            'matrix' => $matrix,
+            'probabilities' => $probabilities,
+            'row_totals' => $rowTotals,
+            'total_transitions' => $totalTransitions
+        ];
+    }
+
     /**
      * 区域→区域转移矩阵，单元格内显示波色概率
      * 统计上一期特码所在区域后，下一期特码在各区域的分布，以及每个区域内的波色占比