增加/context命令、Tab补全与输入历史，命令处理提取到internal/cli

internal/cli/cli.go

@@ -0,0 +1,86 @@
+package cli
+
+import (
+	"fmt"
+	"strings"
+
+	"myaibot/internal/bot"
+)
+
+type Handler struct {
+	bot *bot.Bot
+}
+
+func New(b *bot.Bot) *Handler {
+	return &Handler{bot: b}
+}
+
+func (h *Handler) Handle(input string) bool {
+	fields := strings.Fields(input)
+	cmd, args := fields[0], fields[1:]
+	switch cmd {
+	case "/exit", "/quit":
+		fmt.Println("再见！")
+		return false
+	case "/help":
+		fmt.Println("命令列表:")
+		fmt.Println("  /models            列出所有供应商和模型")
+		fmt.Println("  /use <模型>        切换模型，如 /use deepseek-chat 或 /use deepseek/deepseek-chat")
+		fmt.Println("  /think <on|off>    开启或关闭当前供应商的思考模式")
+		fmt.Println("  /effort <low|high|max>  设置思考强度")
+		fmt.Println("  /context           打印当前聊天上下文")
+		fmt.Println("  /info              显示当前供应商、模型和思考配置")
+		fmt.Println("  /exit              退出")
+	case "/models":
+		for _, m := range h.bot.Models() {
+			fmt.Println("  " + m)
+		}
+	case "/use":
+		if len(args) == 0 {
+			fmt.Println("用法: /use <模型>，如 /use deepseek-chat")
+			return true
+		}
+		if err := h.bot.SwitchModel(args[0]); err != nil {
+			fmt.Printf("⚠️  %v\n", err)
+			return true
+		}
+		provider, model := h.bot.Current()
+		fmt.Printf("已切换到 %s/%s (对话历史已保留)\n", provider, model)
+	case "/think":
+		if len(args) == 0 {
+			fmt.Println("用法: /think <on|off>")
+			return true
+		}
+		v := map[string]string{"on": "enabled", "off": "disabled"}[args[0]]
+		if err := h.bot.SetThinking(v); err != nil {
+			fmt.Printf("⚠️  %v\n", err)
+			return true
+		}
+		fmt.Printf("思考模式已%s\n", map[string]string{"enabled": "开启", "disabled": "关闭"}[v])
+	case "/effort":
+		if len(args) == 0 {
+			fmt.Println("用法: /effort <low|high|max>")
+			return true
+		}
+		if err := h.bot.SetEffort(args[0]); err != nil {
+			fmt.Printf("⚠️  %v\n", err)
+			return true
+		}
+		fmt.Printf("思考强度已设置为 %s\n", args[0])
+	case "/context":
+		fmt.Print(h.bot.ContextDump())
+	case "/info":
+		provider, model := h.bot.Current()
+		thinking, effort := h.bot.ThinkingConfig()
+		if thinking == "" {
+			thinking = "enabled(默认)"
+		}
+		if effort == "" {
+			effort = "high(默认)"
+		}
+		fmt.Printf("供应商: %s, 模型: %s, 思考模式: %s, 思考强度: %s\n", provider, model, thinking, effort)
+	default:
+		fmt.Printf("未知命令: %s，输入 /help 查看命令列表\n", cmd)
+	}
+	return true
+}