fix: use ydotool + wl-copy for text insertion on KDE Wayland

Replace wtype (unsupported on KDE) with ydotool key for Ctrl+V
simulation. Use wl-copy for clipboard-based insertion to avoid
ydotool type's QWERTZ/QWERTY layout mismatch. Use DEVNULL instead
of PIPE for wl-copy to prevent hanging on its forked background
process.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/test_inserter.py

@@ -1,5 +1,5 @@
 import asyncio
-from unittest.mock import AsyncMock, MagicMock, patch, call
+from unittest.mock import AsyncMock, patch, call
 
 import pytest
 
@@ -11,22 +11,25 @@ class TestInserter:
     @patch("whisper_local.inserter.asyncio.sleep", new_callable=AsyncMock)
     @patch("whisper_local.inserter.asyncio.create_subprocess_exec")
     async def test_insert_text_calls_tools_in_order(self, mock_exec, mock_sleep):
-        # Mock für alle subprocess-Aufrufe
         mock_proc = AsyncMock()
         mock_proc.communicate.return_value = (b"alter clipboard", b"")
         mock_proc.returncode = 0
+        mock_proc.wait = AsyncMock()
         mock_exec.return_value = mock_proc
 
         inserter = Inserter()
         await inserter.insert("Hallo Welt")
 
-        # Prüfe dass wl-paste, wl-copy, wtype, wl-copy aufgerufen werden
         calls = mock_exec.call_args_list
         assert len(calls) == 4
-        assert calls[0][0][0] == "wl-paste"                    # Clipboard sichern
-        assert calls[1][0] == ("wl-copy", "Hallo Welt")        # Text in Clipboard
-        assert calls[2][0][0] == "wtype"                        # Ctrl+V simulieren
-        assert calls[3][0] == ("wl-copy", "alter clipboard")   # Clipboard wiederherstellen
+        # wl-paste mit PIPE (braucht stdout)
+        assert calls[0][0] == ("wl-paste", "--no-newline")
+        # wl-copy mit DEVNULL (forkt Hintergrundprozess)
+        assert calls[1][0] == ("wl-copy", "--", "Hallo Welt")
+        # ydotool key
+        assert calls[2][0][0] == "ydotool"
+        # wl-copy restore
+        assert calls[3][0] == ("wl-copy", "--", "alter clipboard")
 
     @pytest.mark.asyncio
     @patch("whisper_local.inserter.asyncio.create_subprocess_exec")
@@ -46,24 +49,21 @@ class TestInserter:
             nonlocal call_count
             call_count += 1
             mock_proc = AsyncMock()
+            mock_proc.wait = AsyncMock()
             if call_count == 1:  # wl-paste
                 mock_proc.communicate.return_value = (b"original", b"")
                 mock_proc.returncode = 0
-            elif call_count == 2:  # wl-copy
-                mock_proc.communicate.return_value = (b"", b"")
-                mock_proc.returncode = 0
-            elif call_count == 3:  # wtype — fails
-                mock_proc.communicate.return_value = (b"", b"error")
-                mock_proc.returncode = 1
-            else:  # wl-copy restore
-                mock_proc.communicate.return_value = (b"", b"")
+            elif call_count == 3:  # ydotool — fails
+                mock_proc.wait.side_effect = OSError("ydotool not found")
+            else:  # wl-copy calls
                 mock_proc.returncode = 0
             return mock_proc
 
         mock_exec.side_effect = mock_create_proc
 
         inserter = Inserter()
-        await inserter.insert("Test")
+        with pytest.raises(OSError):
+            await inserter.insert("Test")
 
-        # Clipboard muss trotzdem wiederhergestellt werden
+        # Clipboard muss trotzdem wiederhergestellt werden (finally-Block)
         assert call_count == 4