disallow to disable guard during focus

backend/app/settings_schema.py

@@ -204,8 +204,6 @@ class BlockerSettings(BaseModel):
     """Terminate a blocked app when it appears; otherwise only warn and log."""
 
     schedule: list[BlockWindow] = Field(default_factory=list)
-    strict: bool = False
-    """The desktop app refuses to switch blocking off while a work interval runs."""
 
     redirect_ip: str = "127.0.0.1"
     app_poll_seconds: int = Field(default=5, ge=1, le=60)