feat: initial recipe-importer application

Python/Flask web app that scrapes Hungarian recipe sites (mindmegette.hu)
and imports them into Mealie via its REST API. Includes dark-themed web UI
with editable preview, Dockerfile, build script, and docker-compose.

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

app/config.py

@@ -0,0 +1,38 @@
+"""Configuration management — persists Mealie connection settings to a JSON file."""
+
+import json
+import os
+from pathlib import Path
+
+DATA_DIR = Path(os.environ.get("DATA_DIR", "/data"))
+CONFIG_FILE = DATA_DIR / "config.json"
+
+_DEFAULTS = {
+    "mealie_url": "",
+    "mealie_api_key": "",
+}
+
+
+def _ensure_dir():
+    DATA_DIR.mkdir(parents=True, exist_ok=True)
+
+
+def load() -> dict:
+    """Return the current config dict, merged with defaults."""
+    cfg = dict(_DEFAULTS)
+    if CONFIG_FILE.exists():
+        try:
+            with open(CONFIG_FILE, "r", encoding="utf-8") as f:
+                cfg.update(json.load(f))
+        except (json.JSONDecodeError, OSError):
+            pass
+    return cfg
+
+
+def save(cfg: dict):
+    """Atomically persist *cfg* to disk."""
+    _ensure_dir()
+    tmp = CONFIG_FILE.with_suffix(".tmp")
+    with open(tmp, "w", encoding="utf-8") as f:
+        json.dump(cfg, f, indent=2, ensure_ascii=False)
+    tmp.replace(CONFIG_FILE)