refactor: rebrand application from "Radarr Language Dashboard" to "Media Max" across all files

Update project name from "Radarr Language Dashboard v2" to "Media Max" in README.md, docker-compose.yml service/container names, app.py logger name and service definition, manifest.json name/short_name/description, and templates/index.html title and header elements. Update docker exec command example in README to use new container name.

app.py

@@ -40,7 +40,7 @@ DB_PATH = os.environ.get("DB_PATH", "/data/cache.db")
 REQUEST_TIMEOUT = int(os.environ.get("REQUEST_TIMEOUT", "20"))
 
 logging.basicConfig(level=os.environ.get("LOG_LEVEL", "INFO").upper(), format="%(asctime)s %(levelname)s %(message)s")
-log = logging.getLogger("radarr-language-dashboard")
+log = logging.getLogger("media-max")
 app = Flask(__name__)
 executor = ThreadPoolExecutor(max_workers=int(os.environ.get("SCAN_WORKERS", "2")))
 scan_executor = ThreadPoolExecutor(max_workers=int(os.environ.get("SCAN_WORKERS", "4")))
@@ -68,7 +68,7 @@ SERVICE_DEFINITIONS = [
     {"key": "libretranslate", "name": "LibreTranslate", "url": LIBRETRANSLATE_URL, "api_key": "", "kind": "http"},
     {"key": "sonarr_prowlarr_proxy", "name": "Sonarr-Prowlarr Proxy", "url": SONARR_PROWLARR_PROXY_URL, "api_key": "", "kind": "http"},
     {"key": "radarr_prowlarr_proxy", "name": "Radarr-Prowlarr Proxy", "url": RADARR_PROWLARR_PROXY_URL, "api_key": "", "kind": "http"},
-    {"key": "dashboard", "name": "Language Dashboard", "url": "", "api_key": "", "kind": "self"},
+    {"key": "dashboard", "name": "Media Max", "url": "", "api_key": "", "kind": "self"},
 ]
 service_status = {service["key"]: {"key": service["key"], "name": service["name"], "status": "checking", "label": "Prüfe …"} for service in SERVICE_DEFINITIONS}