feat: add Doubao ASR client and paste module

internal/paste/paste.go

@@ -0,0 +1,55 @@
+// Package paste handles writing text to the system clipboard and simulating
+// Ctrl+V / Cmd+V to paste into the currently focused application.
+package paste
+
+import (
+	"fmt"
+	"log/slog"
+	"runtime"
+	"time"
+
+	"github.com/go-vgo/robotgo"
+	"golang.design/x/clipboard"
+)
+
+const keyDelay = 50 * time.Millisecond
+
+// Init initializes the clipboard subsystem. Must be called once at startup.
+func Init() error {
+	return clipboard.Init()
+}
+
+// Paste writes text to the clipboard and simulates a paste keystroke.
+// Falls back to clipboard-only if key simulation fails.
+func Paste(text string) error {
+	// Write to clipboard
+	clipboard.Write(clipboard.FmtText, []byte(text))
+
+	// Small delay to ensure clipboard is ready
+	time.Sleep(keyDelay)
+
+	// Simulate paste keystroke
+	if err := simulatePaste(); err != nil {
+		slog.Warn("key simulation failed, text is in clipboard", "err", err)
+		return fmt.Errorf("key simulation failed (text is in clipboard): %w", err)
+	}
+
+	return nil
+}
+
+// ClipboardOnly writes text to clipboard without simulating a keystroke.
+func ClipboardOnly(text string) {
+	clipboard.Write(clipboard.FmtText, []byte(text))
+}
+
+func simulatePaste() error {
+	switch runtime.GOOS {
+	case "darwin":
+		robotgo.KeyTap("v", "command")
+	case "linux", "windows":
+		robotgo.KeyTap("v", "control")
+	default:
+		return fmt.Errorf("unsupported platform: %s", runtime.GOOS)
+	}
+	return nil
+}