重构: Coordinator 接入 agentic loop + audit 拆分(approval/record)

- audit/approval.rs: 审批门控(风险分类+自动执行+挂起审批)

- audit/record.rs: 审计记录写入+历史查询

- coordinator.rs: 移除 deprecated,正式作为 P0 骨架可用

- run_agentic_loop: plan_execution_enabled 时 Coordinator 分解意图→记录 Plan

- audit/mod.rs 从 ~500 行精简至 ~200 行(编排层)

src-tauri/src/lib.rs

@@ -404,7 +404,7 @@ pub fn run() {
             // F-260619-03 Phase B: 路径授权弹窗决策(消费 AiDirAuthRequired 挂起)
             commands::ai::ai_authorize_dir,
             // 审批历史面板(AE-2025-08:查 ai_tool_executions 表,敏感字段截断)
-            commands::ai::audit::list_tool_executions,
+            commands::ai::audit::record::list_tool_executions,
             // 知识库
             commands::knowledge::knowledge_list,
             commands::knowledge::knowledge_get,