Migrate to Python daemon

src/inject.py

@@ -0,0 +1,50 @@
+import subprocess
+import sys
+
+
+def write_clipboard(text: str) -> None:
+    proc = subprocess.run(
+        ["xclip", "-selection", "clipboard", "-in", "-quiet", "-loops", "1"],
+        input=text,
+        text=True,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+    )
+    if proc.returncode != 0:
+        raise RuntimeError(proc.stderr.strip() or "xclip failed")
+
+
+def paste_clipboard() -> None:
+    proc = subprocess.run(
+        ["xdotool", "key", "--clearmodifiers", "ctrl+v"],
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+        text=True,
+    )
+    if proc.returncode != 0:
+        raise RuntimeError(proc.stderr.strip() or "xdotool paste failed")
+
+
+def type_text(text: str) -> None:
+    if not text:
+        return
+    proc = subprocess.run(
+        ["xdotool", "type", "--clearmodifiers", "--delay", "1", text],
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+        text=True,
+    )
+    if proc.returncode != 0:
+        raise RuntimeError(proc.stderr.strip() or "xdotool type failed")
+
+
+def inject(text: str, backend: str) -> None:
+    backend = (backend or "").strip().lower()
+    if backend in ("", "clipboard"):
+        write_clipboard(text)
+        paste_clipboard()
+        return
+    if backend == "injection":
+        type_text(text)
+        return
+    raise ValueError(f"unknown injection backend: {backend}")