Update docs and screenshots

backend/app/core/logging.py

@@ -0,0 +1,32 @@
+import json
+import logging
+from datetime import UTC, datetime
+
+from app.core.config import get_settings
+
+
+class JsonFormatter(logging.Formatter):
+    def format(self, record: logging.LogRecord) -> str:
+        payload = {
+            "timestamp": datetime.now(UTC).isoformat(),
+            "level": record.levelname,
+            "logger": record.name,
+            "message": record.getMessage(),
+        }
+        return json.dumps(payload, ensure_ascii=True)
+
+
+def configure_logging() -> None:
+    settings = get_settings()
+    root = logging.getLogger()
+    if root.handlers:
+        return
+
+    root.setLevel(settings.log_level.upper())
+    console = logging.StreamHandler()
+    console.setFormatter(logging.Formatter("%(asctime)s %(levelname)s %(name)s %(message)s"))
+    root.addHandler(console)
+
+    json_handler = logging.FileHandler(settings.log_dir / "tuxdmx.json.log", encoding="utf-8")
+    json_handler.setFormatter(JsonFormatter())
+    root.addHandler(json_handler)