refactor(character): 重构角色动作与动画系统

- 移除自动回退动作生成逻辑，改为严格检查动作定义
- 增加动作资源缺失时的详细错误报告机制
- 统一输入事件处理接口，优化角色对象生命周期管理
- 改进动画标签管理，移除隐式回退逻辑
- 增强状态机对无效动作的处理能力

Game/src/character/CharacterActionLibrary.cpp

@@ -4,6 +4,7 @@
 #include <frostbite2D/resource/script_parser.h>
 #include <algorithm>
 #include <cctype>
+#include <sstream>
 #include <vector>
 
 namespace frostbite2D {
@@ -227,9 +228,6 @@ void CharacterCommandBuffer::Clear() {
 
 bool CharacterActionLibrary::LoadForConfig(const character::CharacterConfig& config) {
   actions_.clear();
-  // 先填一套最小可运行的默认动作，保证资源或 PVF 缺失时角色仍能工作。
-  BuildFallbackActions(config);
-  // 再尝试用 PVF 动作逻辑覆盖默认值。
   TryLoadPvfActionScripts(config);
   return !actions_.empty();
 }
@@ -247,95 +245,22 @@ const CharacterActionDefinition* CharacterActionLibrary::GetDefaultAction() cons
   return FindAction("idle");
 }
 
-void CharacterActionLibrary::BuildFallbackActions(
-    const character::CharacterConfig& config) {
-  auto animationTagOrDefault = [&config](const std::string& actionId,
-                                         const std::string& fallback) {
-    if (config.animationPath.count(actionId) > 0) {
-      return actionId;
+std::string CharacterActionLibrary::DescribeActionIds() const {
+  if (actions_.empty()) {
+    return "<none>";
+  }
+
+  std::ostringstream stream;
+  bool first = true;
+  for (const auto& [actionId, definition] : actions_) {
+    (void)definition;
+    if (!first) {
+      stream << ", ";
     }
-    if (config.animationPath.count(fallback) > 0) {
-      return fallback;
-    }
-    if (!config.animationPath.empty()) {
-      return config.animationPath.begin()->first;
-    }
-    return fallback;
-  };
-
-  CharacterActionDefinition idle;
-  idle.actionId = "idle";
-  idle.animationTag = animationTagOrDefault("rest", "rest");
-  idle.totalFrames = 1;
-  idle.loop = true;
-  idle.canMove = true;
-  addOrReplaceAction(actions_, idle);
-
-  CharacterActionDefinition move;
-  move.actionId = "move";
-  move.animationTag = animationTagOrDefault("run", animationTagOrDefault("walk", "rest"));
-  move.totalFrames = 1;
-  move.loop = true;
-  move.canMove = true;
-  addOrReplaceAction(actions_, move);
-
-  CharacterActionDefinition jump;
-  jump.actionId = "jump";
-  jump.animationTag = animationTagOrDefault("jump", "rest");
-  jump.totalFrames = 18;
-  jump.canTurn = true;
-  addOrReplaceAction(actions_, jump);
-
-  CharacterActionDefinition fall;
-  fall.actionId = "fall";
-  fall.animationTag = animationTagOrDefault("jump", "rest");
-  fall.totalFrames = 1;
-  fall.loop = true;
-  fall.canTurn = true;
-  addOrReplaceAction(actions_, fall);
-
-  CharacterActionDefinition landing;
-  landing.actionId = "landing";
-  landing.animationTag = animationTagOrDefault("rest", "rest");
-  landing.totalFrames = 6;
-  addOrReplaceAction(actions_, landing);
-
-  CharacterActionDefinition attack1;
-  attack1.actionId = "attack_1";
-  attack1.animationTag = animationTagOrDefault("attack1", animationTagOrDefault("attack", "rest"));
-  attack1.totalFrames = 24;
-  attack1.canMove = false;
-  attack1.canTurn = false;
-  attack1.canBeInterrupted = true;
-  attack1.cancelRules.push_back({"attack_2", 12, 22, true, false});
-  addOrReplaceAction(actions_, attack1);
-
-  CharacterActionDefinition attack2;
-  attack2.actionId = "attack_2";
-  attack2.animationTag = animationTagOrDefault("attack2", attack1.animationTag);
-  attack2.totalFrames = 28;
-  attack2.canMove = false;
-  attack2.canTurn = false;
-  attack2.canBeInterrupted = true;
-  addOrReplaceAction(actions_, attack2);
-
-  CharacterActionDefinition skill1;
-  skill1.actionId = "skill_1";
-  skill1.animationTag = animationTagOrDefault("skill1", attack1.animationTag);
-  skill1.totalFrames = 36;
-  skill1.canMove = false;
-  skill1.canTurn = false;
-  skill1.canBeInterrupted = false;
-  addOrReplaceAction(actions_, skill1);
-
-  CharacterActionDefinition hurt;
-  hurt.actionId = "hurt_light";
-  hurt.animationTag = animationTagOrDefault("damage", animationTagOrDefault("hurt", "rest"));
-  hurt.totalFrames = 18;
-  hurt.canMove = false;
-  hurt.canTurn = false;
-  hurt.canBeInterrupted = true;
-  addOrReplaceAction(actions_, hurt);
+    stream << actionId;
+    first = false;
+  }
+  return stream.str();
 }
 
 bool CharacterActionLibrary::TryLoadPvfActionScripts(
@@ -413,12 +338,6 @@ bool CharacterActionLibrary::TryLoadPvfActionScripts(
       }
     }
 
-    if (definition.animationTag.empty()) {
-      // 如果动作脚本没有显式指定动画标签，则尝试用同名动作映射。
-      if (config.animationPath.count(actionId) > 0) {
-        definition.animationTag = actionId;
-      }
-    }
     addOrReplaceAction(actions_, std::move(definition));
   }