Add injection backends

internal/config/config.go

@@ -21,6 +21,7 @@ type Config struct {
 	WhisperTimeoutSec int    `toml:"whisper_timeout_sec"`
 	SegmentSec        int    `toml:"segment_sec"`
 	Streaming         bool   `toml:"streaming"`
+	InjectionBackend  string `toml:"injection_backend"`
 }
 
 func DefaultPath() string {
@@ -40,6 +41,7 @@ func Defaults() Config {
 		WhisperTimeoutSec: 300,
 		SegmentSec:        5,
 		Streaming:         false,
+		InjectionBackend:  "clipboard",
 	}
 }
 
@@ -108,6 +110,9 @@ func applyEnv(cfg *Config) {
 	if v := os.Getenv("LEL_HOTKEY"); v != "" {
 		cfg.Hotkey = v
 	}
+	if v := os.Getenv("LEL_INJECTION_BACKEND"); v != "" {
+		cfg.InjectionBackend = v
+	}
 }
 
 func parseBool(v string) bool {