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

# Conflicts:
#	CHANGELOG.md

CHANGELOG.md

@@ -19,6 +19,11 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
   - Dashboard boost buttons converted from inline `Paddle.Checkout.open()` to server round-trip via `/billing/checkout/item` endpoint
   - Stripe Tax add-on handles EU VAT (must be enabled in Stripe Dashboard)
 
+### Fixed
+- **City slug transliteration** — replaced broken inline `REGEXP_REPLACE(LOWER(...), '[^a-z0-9]+', '-')` with new `@slugify` SQLMesh macro that uses `STRIP_ACCENTS` + `ß→ss` pre-replacement. Fixes: `Düsseldorf` → `dusseldorf` (was `d-sseldorf`), `Überlingen` → `uberlingen` (was `-berlingen`). Applied to `dim_venues`, `dim_cities`, `dim_locations`. Python `slugify()` in `core.py` updated to match.
+- **B2B article market links** — added missing language prefix (`/markets/germany` → `/de/markets/germany` and `/en/markets/germany`). Without the prefix, Quart interpreted `markets` as a language code → 500 error.
+- **Country overview top-5 city list** — changed ranking from raw `market_score DESC` (which inflated tiny towns with high density scores) to `padel_venue_count DESC` for top cities and `population DESC` for top opportunity cities. Germany now shows Berlin, Hamburg, München instead of Überlingen, Schwaigern.
+
 ### Changed
 - **CRO overhaul — homepage and supplier landing pages** — rewrote all copy from feature-focused ("60+ variables", "6 analysis tabs") to outcome-focused JTBD framing ("Invest in Padel with Confidence, Not Guesswork"). Based on JTBD analysis: the visitor's job is confidence committing €200K+, not "plan faster."
   - **Homepage hero**: new headline, description, and trust-building bullets (bank-ready metrics, real market data, free/no-signup)