Enhance Linux Wayland support and refine transcription logic

- Added instructions for Linux Wayland paste setup in README.md.
- Removed unnecessary JavaScript file and updated references in HTML files.
- Updated DefaultAIPrompt to clarify the role of the transcription tool.
- Removed overlay notifications for Linux to reduce desktop clutter.
- Implemented checks to ensure transcript integrity during refinement.
- Added tests to validate transcript preservation logic.
- Removed ydotool setup script as it is no longer needed.

internal/linux/overlay.go

@@ -1,114 +1,19 @@
 //go:build linux
+
 package linux
 
-import (
-	"fmt"
-	"os/exec"
-	"strings"
-	"sync"
-	"time"
-
-	"wis-free-v3/internal/logger"
-)
-
-// linuxOverlay shows recording/transcription status via libnotify when available
-// (notify-send). There is no full-screen overlay on Linux to avoid a GTK/Cairo
-// dependency beyond what Wails already pulls in.
-type linuxOverlay struct {
-	mu         sync.Mutex
-	lastMsg    string
-	lastUpdate time.Time
-}
+// linuxOverlay intentionally does not show system notifications. Tray status
+// still updates, but dictation no longer spams desktop notification bubbles.
+type linuxOverlay struct{}
 
 func NewOverlay() *linuxOverlay {
 	return &linuxOverlay{}
 }
 
-const overlayNotifyID = "wisfree-overlay"
+func (o *linuxOverlay) Show(message string) {}
 
-var (
-	notifyOnce sync.Once
-	haveNotify bool
-)
+func (o *linuxOverlay) Hide() {}
 
-func detectNotifySend() {
-	_, err := exec.LookPath("notify-send")
-	haveNotify = err == nil
-	if !haveNotify {
-		logger.Info("notify-send not found; install libnotify-bin for recording status toasts on Linux")
-	}
-}
+func (o *linuxOverlay) SetVolume(level float64) {}
 
-func (o *linuxOverlay) Show(message string) {
-	notifyOnce.Do(detectNotifySend)
-	if !haveNotify {
-		return
-	}
-	o.mu.Lock()
-	o.lastMsg = message
-	o.mu.Unlock()
-	cmd := exec.Command("notify-send",
-		"-a", "wis-free-v3",
-		"-r", overlayNotifyID,
-		"-u", "low",
-		"-t", "0",
-		message,
-	)
-	if err := cmd.Run(); err != nil {
-		logger.Error("notify-send failed: %v", err)
-	}
-}
-
-func (o *linuxOverlay) Hide() {
-	notifyOnce.Do(detectNotifySend)
-	if !haveNotify {
-		return
-	}
-	o.mu.Lock()
-	o.lastMsg = ""
-	o.mu.Unlock()
-	// Replacing the same ID with a 1ms toast clears the bubble on many DEs (GNOME, KDE).
-	_ = exec.Command("notify-send", "-a", "wis-free-v3", "-r", overlayNotifyID, "-t", "1", " ").Run()
-}
-
-func (o *linuxOverlay) SetVolume(level float64) {
-	notifyOnce.Do(detectNotifySend)
-	if !haveNotify {
-		return
-	}
-	o.mu.Lock()
-	now := time.Now()
-	// Throttle to at most once per 300ms to prevent spawning notify-send processes at ~100Hz (buffer rate)
-	if now.Sub(o.lastUpdate) < 300*time.Millisecond {
-		o.mu.Unlock()
-		return
-	}
-	o.lastUpdate = now
-	base := o.lastMsg
-	o.mu.Unlock()
-	if strings.TrimSpace(base) == "" {
-		return
-	}
-	pct := int(level*100 + 0.5)
-	if pct < 0 {
-		pct = 0
-	}
-	if pct > 100 {
-		pct = 100
-	}
-	body := fmt.Sprintf("%s — mic %d%%", base, pct)
-	cmd := exec.Command("notify-send",
-		"-a", "wis-free-v3",
-		"-r", overlayNotifyID,
-		"-u", "low",
-		"-t", "0",
-		body,
-	)
-	if err := cmd.Run(); err != nil {
-		logger.Error("notify-send failed: %v", err)
-	}
-}
-
-func (o *linuxOverlay) Close() {
-	o.Hide()
-}
+func (o *linuxOverlay) Close() {}