Social: Trainingstipp-Generator, Übungen in DB, 3 Stil-Varianten

- training_exercises Tabelle mit 13 Übungen aus App-Bibliothek
- POST /social/training-tip: Stil-Varianten tutorial/community/aspirational
- exercise_id in social_content für Wiederholungs-Tracking
- Admin-Stats: Social-Media-Sektion mit Status-Übersicht + letzte 10 Posts
- SW by-v349, APP_VER 336

backend/routes/admin.py

@@ -163,6 +163,40 @@ async def stats(user=Depends(require_mod)):
         except Exception:
             ki_today = ki_month = ki_users_today = 0
 
+        # Social Media Tracking
+        try:
+            social_total     = conn.execute("SELECT COUNT(*) FROM social_content").fetchone()[0]
+            social_published = conn.execute(
+                "SELECT COUNT(*) FROM social_content WHERE status='published'"
+            ).fetchone()[0]
+            social_scheduled = conn.execute(
+                "SELECT COUNT(*) FROM social_content WHERE status='scheduled'"
+            ).fetchone()[0]
+            social_ideas     = conn.execute(
+                "SELECT COUNT(*) FROM social_content WHERE status='idea'"
+            ).fetchone()[0]
+            social_this_week = conn.execute(
+                "SELECT COUNT(*) FROM social_content WHERE status='published' "
+                "AND published_at >= datetime('now', '-7 days')"
+            ).fetchone()[0]
+            social_by_cat    = {
+                row[0]: row[1] for row in conn.execute(
+                    "SELECT category, COUNT(*) FROM social_content "
+                    "WHERE category IS NOT NULL GROUP BY category ORDER BY 2 DESC"
+                ).fetchall()
+            }
+            social_recent    = [dict(r) for r in conn.execute(
+                """SELECT topic, status, platform, format, created_at,
+                          published_at, category, ai_score
+                   FROM social_content
+                   ORDER BY created_at DESC LIMIT 10"""
+            ).fetchall()]
+        except Exception:
+            social_total = social_published = social_scheduled = 0
+            social_ideas = social_this_week = 0
+            social_by_cat = {}
+            social_recent = []
+
     return {
         "users_total":        users_total,
         "users_today":        users_today,
@@ -183,6 +217,13 @@ async def stats(user=Depends(require_mod)):
         "ki_today":           ki_today,
         "ki_month":           ki_month,
         "ki_users_today":     ki_users_today,
+        "social_total":       social_total,
+        "social_published":   social_published,
+        "social_scheduled":   social_scheduled,
+        "social_ideas":       social_ideas,
+        "social_this_week":   social_this_week,
+        "social_by_cat":      social_by_cat,
+        "social_recent":      social_recent,
     }