refactor: skill.rs → types.rs 重命名

类型定义重命名，消除过时的 'skill' 概念

src/main.rs

@@ -15,7 +15,7 @@ use db::Database;
 use llm::{Conversation, ConversationConfig, DEFAULT_SYSTEM_PROMPT, ToolExecutor, Usage};
 use std::sync::Arc;
 use tools::approval::{ApprovalDecision, ApprovalManager};
-use tools::skill::ExecutionContext;
+use tools::types::ExecutionContext;
 use tracing::{error, info};
 use wechat::client::WeChatClient;
 
@@ -293,7 +293,7 @@ async fn cmd_listen(
         let session = conv.session();
         let approval = approval_manager.clone();
         let memory_store = memory_store.clone();
-        let send_wechat: tools::skill::WechatSender = {
+        let send_wechat: tools::types::WechatSender = {
             let client = client.clone();
             Arc::new(move |user_id: &str, text: &str| {
                 let client = client.clone();
@@ -816,7 +816,7 @@ async fn cmd_send(
 }
 
 
-use tools::skill::SkillResult;
+use tools::types::SkillResult;
 
 async fn builtin_approve(ctx: &ExecutionContext, name: &str) -> Result<bool, String> {
     let manager = match ctx.approval_manager.as_ref() {
@@ -841,10 +841,10 @@ async fn builtin_approve(ctx: &ExecutionContext, name: &str) -> Result<bool, Str
     }
 }
 
-fn build_capability_list(specs: &[tools::skill::SkillSpec]) -> String {
+fn build_capability_list(specs: &[tools::types::SkillSpec]) -> String {
     let mut lines = vec!["📋 可用工具:".to_string()];
     for spec in specs {
-        let risk = if spec.risk_level == tools::skill::RiskLevel::High {
+        let risk = if spec.risk_level == tools::types::RiskLevel::High {
             " ⚠️需确认"
         } else {
             ""