Landing: emotionaler Hero, Social-Proof-Stats, Testimonial-Slots, Scroll-Animationen (SW by-v952)

- Hero-Headline: "Weil jeder Moment mit ihm zählt." (warm/emotional statt Feature-Liste)
- CTA umbenannt: "Kostenlos starten" statt "Ich bin Hundebesitzer"
- Hero-Stats-Zeile: live Nutzer/Hunde/km-Zähler (nur wenn >0)
- Stats-Band: orangener Balken mit 4 Live-Kennzahlen nach der Zwei-Welten-Section
- Testimonial-Section: 3 Platzhalter-Karten zwischen Features und Züchter-Bereich
- Scroll-Animationen: IntersectionObserver auf alle Cards (fade-up)
- API: /api/stats/public — öffentlicher Endpoint, 5-Min-Cache

backend/routes/stats.py

@@ -1,3 +1,4 @@
+import time
 from fastapi import APIRouter, Depends
 from database import db
 from auth import get_current_user, get_current_user_optional
@@ -19,6 +20,35 @@ _STATS_SQL = """
 """
 
 
+_pub_cache: dict = {"data": None, "ts": 0.0}
+_PUB_TTL = 300  # 5 Minuten
+
+
+@router.get("/public")
+async def public_stats():
+    now = time.time()
+    if _pub_cache["data"] and now - _pub_cache["ts"] < _PUB_TTL:
+        return _pub_cache["data"]
+    with db() as conn:
+        users = conn.execute("SELECT COUNT(*) FROM users").fetchone()[0]
+        dogs  = conn.execute("SELECT COUNT(*) FROM dogs").fetchone()[0]
+        km    = conn.execute(
+            "SELECT ROUND(COALESCE(SUM(distanz_km),0),0) FROM routes"
+        ).fetchone()[0]
+        posts = conn.execute("SELECT COUNT(*) FROM forum_posts").fetchone()[0]
+        diary = conn.execute("SELECT COUNT(*) FROM diary").fetchone()[0]
+    data = {
+        "users": users,
+        "dogs": dogs,
+        "km": int(km or 0),
+        "forum_posts": posts,
+        "diary_entries": diary,
+    }
+    _pub_cache["data"] = data
+    _pub_cache["ts"] = now
+    return data
+
+
 @router.get("/leaderboard")
 async def leaderboard(_user=Depends(get_current_user_optional)):
     with db() as conn: