S4-07 process 3

- 组件 Tag 数量预算不再写死在 ResolveTagBudget(...) 里，而是走 RarityTagBudget.txt -> DRRarityTagBudget -> RarityTagBudgetRuleRegistry -> InventoryTagRuleService 这条表驱动链。
- TagBudget.txt:1 新增了按品质的 MinCount/MaxCount，预算缓存和加载入口分别在 RarityTagBudgetRuleRegistry.cs:7 和 ProcedurePreload.cs:18。
- 生成逻辑已经接到新规则，InventoryTagRuleService.cs:10 现在会先按 Tag.txt 过滤/加权，再按 RarityTagBudget 决定抽几个 Tag。

Assets/GameMain/Scripts/Definition/InventoryTagRuleService.cs

@@ -13,7 +13,8 @@ namespace GeometryTD.Definition
             InventoryTagSourceType sourceType,
             long itemInstanceId,
             int configId,
-            IReadOnlyDictionary<TagType, TagGenerationRuleData> rulesByTag = null)
+            IReadOnlyDictionary<TagType, TagGenerationRuleData> rulesByTag = null,
+            IReadOnlyDictionary<RarityType, RarityTagBudgetRuleData> rarityTagBudgetRulesByRarity = null)
         {
             IReadOnlyDictionary<TagType, TagGenerationRuleData> ruleLookup = rulesByTag ?? TagGenerationRuleRegistry.Rules;
             TagType[] eligibleTags = GetEligibleTags(possibleTags, rarity, ruleLookup);
@@ -23,7 +24,7 @@ namespace GeometryTD.Definition
             }
 
             Random random = new Random(BuildStableSeed(rarity, sourceType, itemInstanceId, configId));
-            int tagBudget = ResolveTagBudget(rarity, random);
+            int tagBudget = ResolveRarityTagBudget(rarity, random, rarityTagBudgetRulesByRarity);
             if (tagBudget <= 0)
             {
                 return Array.Empty<TagType>();
@@ -88,26 +89,25 @@ namespace GeometryTD.Definition
             return result;
         }
 
-        public static int ResolveTagBudget(RarityType rarity, Random random)
+        public static int ResolveRarityTagBudget(
+            RarityType rarity,
+            Random random,
+            IReadOnlyDictionary<RarityType, RarityTagBudgetRuleData> rarityTagBudgetRulesByRarity = null)
         {
             RarityType normalizedRarity = InventoryRarityRuleService.NormalizeComponentRarity(rarity);
-            random ??= new Random(0);
+            IReadOnlyDictionary<RarityType, RarityTagBudgetRuleData> ruleLookup = rarityTagBudgetRulesByRarity ?? RarityTagBudgetRuleRegistry.Rules;
+            RarityTagBudgetRuleData rule = GetRarityTagBudgetRule(normalizedRarity, ruleLookup);
 
-            switch (normalizedRarity)
+            Debug.Assert(rule.MinCount >= 0);
+            Debug.Assert(rule.MaxCount >= rule.MinCount);
+
+            if (rule.MinCount == rule.MaxCount)
             {
-                case RarityType.White:
-                    return random.Next(0, 2);
-                case RarityType.Green:
-                    return 1;
-                case RarityType.Blue:
-                    return random.Next(1, 3);
-                case RarityType.Purple:
-                    return 2;
-                case RarityType.Red:
-                    return random.Next(2, 4);
-                default:
-                    return 0;
+                return rule.MinCount;
             }
+
+            random ??= new Random(0);
+            return random.Next(rule.MinCount, rule.MaxCount + 1);
         }
 
         private static bool IsSupportedLaunchTag(TagType tagType)
@@ -131,6 +131,15 @@ namespace GeometryTD.Definition
             return false;
         }
 
+        private static RarityTagBudgetRuleData GetRarityTagBudgetRule(
+            RarityType rarity,
+            IReadOnlyDictionary<RarityType, RarityTagBudgetRuleData> ruleLookup)
+        {
+            Debug.Assert(ruleLookup != null);
+            Debug.Assert(ruleLookup.TryGetValue(rarity, out _));
+            return ruleLookup[rarity];
+        }
+
         private static int RollWeightedIndex(
             IReadOnlyList<TagType> pool,
             IReadOnlyDictionary<TagType, TagGenerationRuleData> ruleLookup,

Assets/GameMain/Scripts/Definition/RarityTagBudgetRuleData.cs

@@ -0,0 +1,9 @@
+namespace GeometryTD.Definition
+{
+    public sealed class RarityTagBudgetRuleData
+    {
+        public RarityType Rarity { get; set; }
+        public int MinCount { get; set; }
+        public int MaxCount { get; set; }
+    }
+}

Assets/GameMain/Scripts/Definition/RarityTagBudgetRuleData.cs.meta

@@ -0,0 +1,11 @@
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Assets/GameMain/Scripts/Definition/RarityTagBudgetRuleRegistry.cs

@@ -0,0 +1,73 @@
+using System.Collections.Generic;
+using GeometryTD.DataTable;
+using UnityEngine;
+
+namespace GeometryTD.Definition
+{
+    public static class RarityTagBudgetRuleRegistry
+    {
+        private static readonly Dictionary<RarityType, RarityTagBudgetRuleData> RulesByRarity = CreateDefaultRules();
+
+        public static IReadOnlyDictionary<RarityType, RarityTagBudgetRuleData> Rules => RulesByRarity;
+
+        public static void ResetToDefaults()
+        {
+            RulesByRarity.Clear();
+            foreach (KeyValuePair<RarityType, RarityTagBudgetRuleData> pair in CreateDefaultRules())
+            {
+                RulesByRarity.Add(pair.Key, pair.Value);
+            }
+        }
+
+        public static void LoadFromRows(IEnumerable<DRRarityTagBudget> rows)
+        {
+            ResetToDefaults();
+            foreach (DRRarityTagBudget row in rows)
+            {
+                ApplyRow(row);
+            }
+        }
+
+        public static bool TryGetRule(RarityType rarity, out RarityTagBudgetRuleData rule)
+        {
+            return RulesByRarity.TryGetValue(rarity, out rule);
+        }
+
+        private static Dictionary<RarityType, RarityTagBudgetRuleData> CreateDefaultRules()
+        {
+            return new Dictionary<RarityType, RarityTagBudgetRuleData>
+            {
+                [RarityType.White] = CreateRule(RarityType.White, 0, 1),
+                [RarityType.Green] = CreateRule(RarityType.Green, 1, 1),
+                [RarityType.Blue] = CreateRule(RarityType.Blue, 1, 2),
+                [RarityType.Purple] = CreateRule(RarityType.Purple, 2, 2),
+                [RarityType.Red] = CreateRule(RarityType.Red, 2, 3)
+            };
+        }
+
+        private static RarityTagBudgetRuleData CreateRule(RarityType rarity, int minCount, int maxCount)
+        {
+            Debug.Assert(rarity >= RarityType.White && rarity <= RarityType.Red);
+            Debug.Assert(minCount >= 0);
+            Debug.Assert(maxCount >= minCount);
+
+            return new RarityTagBudgetRuleData
+            {
+                Rarity = rarity,
+                MinCount = minCount,
+                MaxCount = maxCount
+            };
+        }
+
+        private static void ApplyRow(DRRarityTagBudget row)
+        {
+            Debug.Assert(row != null);
+            Debug.Assert(row.Id > 0);
+            Debug.Assert(row.Rarity >= RarityType.White && row.Rarity <= RarityType.Red);
+            Debug.Assert(row.MinCount >= 0);
+            Debug.Assert(row.MaxCount >= row.MinCount);
+
+            RulesByRarity[row.Rarity] = CreateRule(row.Rarity, row.MinCount, row.MaxCount);
+        }
+    }
+}

Assets/GameMain/Scripts/Definition/RarityTagBudgetRuleRegistry.cs.meta

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