feat: 工具系统迁移 + 重型插件骨架 + 前端交互增强

- 工具系统从 kilostar/plugin/tool_plugin/ 迁移到 data/toolset/（manifest.json 声明式）
- 新增 plugin_runtime 模块：BaseOrganization / GlobalPluginManager / loader / tool_bridge
- 新增 org_task + org_task_event 表及 DAO（alembic 0009）
- 新增 /api/v1/plugin 路由（submit/status/stream/install/reload）
- 新增 data/plugin/example_dept 示例重型插件
- regulatory_node 支持聊天历史上下文注入
- send_file 改为 artifact 存盘 + SSE 推送下载链接
- 前端 WorkflowFileCard 组件 + ToolSettings README 渲染
- utils 整理：合并 access/role_check、standalone_proxy→ray_compat、删除废弃模块
- 项目结构文档移至 docs/STRUCTURE.md 并详细展开

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

kilostar/worker_individual/skill_individual.py

@@ -35,9 +35,10 @@ class SkillIndividual(BaseIndividual):
 
     async def _load_skill_tools(self):
         """动态加载已绑定的 skill 工具。"""
+        from kilostar.utils.settings import get_plugin_dir
+
         tools = []
         bound_skill = self.agent_config.get("bound_skill", "")
-        # bound_skill can be string or dict {"skill_name": ["file1", "file2"]}
         skill_mapper = {}
         if isinstance(bound_skill, str) and bound_skill:
             try:
@@ -47,9 +48,7 @@ class SkillIndividual(BaseIndividual):
         elif isinstance(bound_skill, dict):
             skill_mapper = bound_skill
 
-        skill_base_dir = os.path.abspath(
-            os.path.join(os.path.dirname(__file__), "..", "plugin", "skill")
-        )
+        skill_base_dir = str(get_plugin_dir() / "skill")
 
         for skill_name, _ in skill_mapper.items():
             skill_path = os.path.join(skill_base_dir, skill_name)