refactor: 项目结构重组，src/ 扁平化为根目录，提取 pkg/ 子包

- 模块名重命名 yunshu -> hub.gaomia.site/titor/YunShu
- Go 版本升级 1.21 -> 1.25
- src/ 目录删除，所有文件移至根目录
- 新增 pkg/mdprint/: Markdown AST 解析+ANSI 渲染
- 新增 pkg/style/: 终端颜色样式（8色 ANSI + 24位真彩色）
- 新增 pkg/termui/: 终端输入组件（交互式输入/密码/确认）
- 更新文档：AGENTS.md、architecture.md、changelog.md、taolun.md
- gitignore 通配符修复 yunshu.exe -> yunshu.exe*

pkg/termui/completer.go

@@ -0,0 +1 @@
+package termui

pkg/termui/input.go

@@ -0,0 +1,189 @@
+package termui
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+	"syscall"
+	"unsafe"
+
+	"hub.gaomia.site/titor/YunShu/pkg/style"
+)
+
+const (
+	stdInputHandle     = ^uintptr(9)
+	stdOutputHandle    = ^uintptr(10)
+	enableProcessed    = 0x0001
+	enableLineInput    = 0x0002
+	enableEchoInput    = 0x0004
+	enableVtProcessing = 0x0004
+)
+
+var (
+	kernel32          = syscall.NewLazyDLL("kernel32.dll")
+	procGetStdHandle  = kernel32.NewProc("GetStdHandle")
+	procGetConsoleMode = kernel32.NewProc("GetConsoleMode")
+	procSetConsoleMode = kernel32.NewProc("SetConsoleMode")
+)
+
+func ensureLineMode() {
+	h, _, _ := procGetStdHandle.Call(stdInputHandle)
+	if h == 0 || h == uintptr(syscall.InvalidHandle) {
+		return
+	}
+	var mode uint32
+	ret, _, _ := procGetConsoleMode.Call(h, uintptr(unsafe.Pointer(&mode)))
+	if ret == 0 {
+		return
+	}
+	need := uint32(enableProcessed | enableLineInput | enableEchoInput)
+	if mode&need != need {
+		procSetConsoleMode.Call(h, uintptr(need))
+	}
+}
+
+type InputConfig struct {
+	Label     string
+	Help      string
+	Default   string
+	Required  bool
+	Validator Validator
+}
+
+type InputOption func(*InputConfig)
+
+func WithDefault(v string) InputOption {
+	return func(c *InputConfig) { c.Default = v }
+}
+
+func WithHelp(v string) InputOption {
+	return func(c *InputConfig) { c.Help = v }
+}
+
+func WithRequired(v bool) InputOption {
+	return func(c *InputConfig) { c.Required = v }
+}
+
+func WithValidator(v Validator) InputOption {
+	return func(c *InputConfig) { c.Validator = v }
+}
+
+func applyOpts(opts []InputOption) InputConfig {
+	c := InputConfig{}
+	for _, o := range opts {
+		o(&c)
+	}
+	return c
+}
+
+func printLabel(label string, required bool) {
+	s := style.New().Bold().Render(label)
+	if required {
+		s += "（必填）"
+	}
+	fmt.Println(s)
+}
+
+func ReadLine() string {
+	ensureLineMode()
+	r := bufio.NewReader(os.Stdin)
+	s, err := r.ReadString('\n')
+	if err != nil {
+		return ""
+	}
+	return strings.TrimRight(s, "\r\n")
+}
+
+func TextInput(label string, opts ...InputOption) string {
+	cfg := applyOpts(opts)
+	printLabel(label, cfg.Required)
+
+	for {
+		fmt.Print(style.Cyan.Render("? "))
+
+		line := ReadLine()
+
+		if line == "" {
+			line = cfg.Default
+		}
+
+		var err error
+		if cfg.Required && line == "" {
+			err = fmt.Errorf("不能为空")
+		} else if cfg.Validator != nil {
+			err = cfg.Validator(line)
+		}
+
+		if err != nil {
+			fmt.Println(style.Red.Render("⚠ " + err.Error()))
+			continue
+		}
+
+		fmt.Println(style.Green.Render("✔ " + line))
+		return line
+	}
+}
+
+func PasswordInput(label string, opts ...InputOption) string {
+	cfg := applyOpts(opts)
+	printLabel(label, cfg.Required)
+
+	for {
+		fmt.Print(style.Cyan.Render("? "))
+
+		line := ReadLine()
+
+		fmt.Print("\033[A\r\033[K")
+
+		if line == "" {
+			line = cfg.Default
+		}
+
+		var err error
+		if cfg.Required && line == "" {
+			err = fmt.Errorf("不能为空")
+		} else if cfg.Validator != nil {
+			err = cfg.Validator(line)
+		}
+
+		if err != nil {
+			fmt.Println(style.Red.Render("⚠ " + err.Error()))
+			continue
+		}
+
+		masked := strings.Repeat("*", len(line))
+		fmt.Println(style.Green.Render("✔ " + masked))
+		return line
+	}
+}
+
+func Confirm(label string, defaultValue bool) bool {
+	hint := "Y/n"
+	if !defaultValue {
+		hint = "y/N"
+	}
+
+	fmt.Print(style.Cyan.Render("?"), label, "（", hint, "）")
+
+	line := ReadLine()
+	line = strings.ToLower(line)
+
+	fmt.Print("\033[A\r\033[K")
+
+	ok := defaultValue
+	if line == "y" || line == "yes" {
+		ok = true
+	} else if line == "n" || line == "no" {
+		ok = false
+	} else if line != "" {
+		ok = false
+	}
+
+	if ok {
+		fmt.Println(style.Green.Render("✔ " + label))
+	} else {
+		fmt.Println(style.Red.Render("✘ " + label))
+	}
+	return ok
+}

pkg/termui/validate.go

@@ -0,0 +1,67 @@
+package termui
+
+import (
+	"fmt"
+	"strings"
+)
+
+type Validator func(string) error
+
+var (
+	NonEmpty Validator = func(v string) error {
+		if v == "" {
+			return fmt.Errorf("不能为空")
+		}
+		return nil
+	}
+
+	IsURL Validator = func(v string) error {
+		if !strings.HasPrefix(v, "http://") && !strings.HasPrefix(v, "https://") {
+			return fmt.Errorf("必须以 http:// 或 https:// 开头")
+		}
+		return nil
+	}
+)
+
+func MaxLength(n int) Validator {
+	return func(v string) error {
+		if len(v) > n {
+			return fmt.Errorf("不能超过 %d 个字符", n)
+		}
+		return nil
+	}
+}
+
+func MinLength(n int) Validator {
+	return func(v string) error {
+		if len(v) < n {
+			return fmt.Errorf("至少需要 %d 个字符", n)
+		}
+		return nil
+	}
+}
+
+func And(vv ...Validator) Validator {
+	return func(v string) error {
+		for _, fn := range vv {
+			if err := fn(v); err != nil {
+				return err
+			}
+		}
+		return nil
+	}
+}
+
+func Or(vv ...Validator) Validator {
+	return func(v string) error {
+		var lastErr error
+		for _, fn := range vv {
+			if err := fn(v); err == nil {
+				return nil
+			} else {
+				lastErr = err
+			}
+		}
+		return lastErr
+	}
+}