feat(toolset): 工具系统重构为 toolset 统一管理，新增系统预置工具集

将工具管理从"agent 挂单个 tool"改为"agent 挂 toolset"模式：
- 三个系统预置工具集（system_basic/system_chat/system_workflow）入 DB
- 新增 send_file 工具（系统对话工具集）、修复 approval actor 调用 bug
- 后端 agent 加载全部走 toolset 链路，移除 load_tools_from_list
- 前端工具集中心卡片展示 + agent 配置改为 toolset 多选
- resource API 增加 category 过滤与系统 toolset 保护

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

kilostar/core/individual/consciousness_node/consciousness_node.py

@@ -45,14 +45,12 @@ class ConsciousnessNode:
         global_state_machine: GlobalStateMachine,
         provider_title: str,
         model_id: str,
-        tools_list: list[str] = None,
         toolsets=None,
         locale: str | None = None,
         custom_system_prompt: str | None = None,
     ) -> None:
         system_prompt: str = agent_prompt("consciousness_node", locale=locale, custom_system_prompt=custom_system_prompt)
         output_type = Union[ForregulatoryNode, ForWorkflow, ForWorkflowEngine]
-        from kilostar.utils.get_tool import load_tools_from_list
         from kilostar.core.global_state_machine.gsm_snapshot import fetch_snapshot
 
         snapshot = await fetch_snapshot(gsm_actor=global_state_machine)
@@ -62,7 +60,6 @@ class ConsciousnessNode:
             raise ValueError(t("provider_not_registered", locale=locale, provider_title=provider_title))
         agent_factory = AgentFactory()
 
-        callables = load_tools_from_list(tools_list)
         self.agent = agent_factory.create_agent(
             provider=provider,
             model_id=model_id,
@@ -70,7 +67,6 @@ class ConsciousnessNode:
             system_prompt=system_prompt,
             deps_type=ConsciousnessNodeDeps,
             agent_name="consciousness_node",
-            tools=callables,
             toolsets=toolsets,
         )