fix(content): slug transliteration, article links, country overview ranking

# Conflicts:
#	CHANGELOG.md

web/src/padelnomics/core.py

@@ -767,9 +767,14 @@ async def get_all_paddle_prices() -> dict[str, str]:
 
 
 def slugify(text: str, max_length_chars: int = 80) -> str:
-    """Convert text to URL-safe slug."""
+    """Convert text to URL-safe slug.
+
+    Pre-replaces ß→ss before NFKD normalization so output matches the SQL
+    @slugify macro (which uses DuckDB STRIP_ACCENTS + REPLACE).
+    """
+    text = text.lower().replace("ß", "ss")
     text = unicodedata.normalize("NFKD", text).encode("ascii", "ignore").decode()
-    text = re.sub(r"[^\w\s-]", "", text.lower())
+    text = re.sub(r"[^\w\s-]", "", text)
     text = re.sub(r"[-\s]+", "-", text).strip("-")
     return text[:max_length_chars]