Add clipboard cleanup option for clipboard backend

README.md

@@ -90,7 +90,10 @@ Create `~/.config/lel/config.json`:
   "daemon": { "hotkey": "Cmd+m" },
   "recording": { "input": "0" },
   "stt": { "model": "base", "device": "cpu" },
-  "injection": { "backend": "clipboard" },
+  "injection": {
+    "backend": "clipboard",
+    "remove_transcription_from_clipboard": false
+  },
   "ai": { "enabled": true },
   "vocabulary": {
     "replacements": [
@@ -161,6 +164,7 @@ Injection backends:
 
 - `clipboard`: copy to clipboard and inject via Ctrl+Shift+V (GTK clipboard + XTest)
 - `injection`: type the text with simulated keypresses (XTest)
+- `injection.remove_transcription_from_clipboard`: when `true` and backend is `clipboard`, restores/clears the clipboard after paste so the transcript is not kept there
 
 AI processing: