已把模型层改成组合式结构并补齐 MVC/内容配置骨架：Unit/任务/运行时状态现在通过组件组合，GameManager 作为桥接层改为驱动 GameSession/Controller；同时新增学科/羁绊/装备/任务/肉鸽等定义结构，预留 i18n 与 Mod 内容加载接口。
- 组合式单位与数值基础重构：scripts/Models/UnitModel.cs, scripts/Models/UnitComponents.cs, scripts/Models/StudentModel.cs, scripts/Models/MentorModel.cs, scripts/Models/StaffModel.cs, scripts/Models/PropertyValue.cs, scripts/Models/StatusValue.cs
- 任务与运行时状态骨架：scripts/Models/Task.cs, scripts/Models/TaskDefinitions.cs, scripts/Models/GameState.cs
- 配置与规则定义骨架：scripts/Models/DefinitionSupport.cs, scripts/Models/DomainEnums.cs, scripts/Models/Modifiers.cs, scripts/Models/DisciplineDefinitions.cs, scripts/Models/SynergyDefinitions.cs, scripts/Models/ItemDefinitions.cs, scripts/Models/PaperDefinitions.cs, scripts/Models/RogueliteDefinitions.cs, scripts/Models/GameContentDatabase.cs, scripts/Models/CoreIds.cs
- MVC/会话/系统/i18n/Mod 支撑：scripts/Core/GameSession.cs, scripts/Core/GameSystems.cs, scripts/Core/GameController.cs, scripts/Core/Mvc.cs, scripts/Core/LocalizationService.cs, scripts/Core/ContentRegistry.cs, scripts/Core/ModManifest.cs, scripts/Core/EventBus.cs
- 主控流程衔接：scripts/GameManager.cs
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