feat: Add endpoints for activity statistics and uncategorized activities

- Implemented a new endpoint to retrieve activity statistics for the last 30 entries, including total calories and duration by activity type.
- Added an endpoint to list activities without assigned training types, grouped by activity type.
- Removed deprecated versions of the statistics and uncategorized activities endpoints for cleaner code.

backend/routers/activity.py

@@ -133,6 +133,66 @@ def create_activity(e: ActivityEntry, x_profile_id: Optional[str]=Header(default
     return {"id":eid,"date":e.date}
 
 
+@router.get("/stats")
+def activity_stats(session: dict = Depends(require_auth)):
+    """Get activity statistics (last 30 entries)."""
+    pid = str(session["profile_id"])
+    with get_db() as conn:
+        cur = get_cursor(conn)
+        cur.execute("SELECT * FROM profiles WHERE id=%s", (pid,))
+        profile = r2d(cur.fetchone())
+        quality_filter = get_quality_filter_sql(profile or {})
+        cur.execute(
+            f"""
+            SELECT * FROM activity_log
+            WHERE profile_id=%s {quality_filter}
+            ORDER BY date DESC
+            LIMIT 30
+            """,
+            (pid,),
+        )
+        rows = [r2d(r) for r in cur.fetchall()]
+    if not rows:
+        return {"count": 0, "total_kcal": 0, "total_min": 0, "by_type": {}}
+    total_kcal = sum(float(r.get("kcal_active") or 0) for r in rows)
+    total_min = sum(float(r.get("duration_min") or 0) for r in rows)
+    by_type = {}
+    for r in rows:
+        t = r["activity_type"]
+        by_type.setdefault(t, {"count": 0, "kcal": 0, "min": 0})
+        by_type[t]["count"] += 1
+        by_type[t]["kcal"] += float(r.get("kcal_active") or 0)
+        by_type[t]["min"] += float(r.get("duration_min") or 0)
+    return {
+        "count": len(rows),
+        "total_kcal": round(total_kcal),
+        "total_min": round(total_min),
+        "by_type": by_type,
+    }
+
+
+@router.get("/uncategorized")
+def list_uncategorized_activities(
+    session: dict = Depends(require_auth),
+):
+    """Get activities without assigned training type, grouped by activity_type."""
+    pid = str(session["profile_id"])
+    with get_db() as conn:
+        cur = get_cursor(conn)
+        cur.execute(
+            """
+            SELECT activity_type, COUNT(*) as count,
+                   MIN(date) as first_date, MAX(date) as last_date
+            FROM activity_log
+            WHERE profile_id=%s AND training_type_id IS NULL
+            GROUP BY activity_type
+            ORDER BY count DESC
+        """,
+            (pid,),
+        )
+        return [r2d(r) for r in cur.fetchall()]
+
+
 @router.put("/{eid}")
 def update_activity(eid: str, e: ActivityEntry, x_profile_id: Optional[str]=Header(default=None), session: dict=Depends(require_auth)):
     """Update existing activity entry."""
@@ -228,37 +288,6 @@ def get_activity_session(
     return unit
 
 
-@router.get("/stats")
-def activity_stats(session: dict = Depends(require_auth)):
-    """Get activity statistics (last 30 entries)."""
-    pid = str(session["profile_id"])
-    with get_db() as conn:
-        cur = get_cursor(conn)
-        cur.execute("SELECT * FROM profiles WHERE id=%s", (pid,))
-        profile = r2d(cur.fetchone())
-        quality_filter = get_quality_filter_sql(profile or {})
-        cur.execute(
-            f"""
-            SELECT * FROM activity_log
-            WHERE profile_id=%s {quality_filter}
-            ORDER BY date DESC
-            LIMIT 30
-            """,
-            (pid,),
-        )
-        rows = [r2d(r) for r in cur.fetchall()]
-    if not rows: return {"count":0,"total_kcal":0,"total_min":0,"by_type":{}}
-    total_kcal=sum(float(r.get('kcal_active') or 0) for r in rows)
-    total_min=sum(float(r.get('duration_min') or 0) for r in rows)
-    by_type={}
-    for r in rows:
-        t=r['activity_type']; by_type.setdefault(t,{'count':0,'kcal':0,'min':0})
-        by_type[t]['count']+=1
-        by_type[t]['kcal']+=float(r.get('kcal_active') or 0)
-        by_type[t]['min']+=float(r.get('duration_min') or 0)
-    return {"count":len(rows),"total_kcal":round(total_kcal),"total_min":round(total_min),"by_type":by_type}
-
-
 def get_training_type_for_activity_with_cursor(cur, activity_type: str, profile_id: str | None = None):
     """
     Wie get_training_type_for_activity, aber mit bestehendem Cursor (z. B. Universal-CSV-Import).
@@ -312,23 +341,6 @@ def get_training_type_for_activity(activity_type: str, profile_id: str = None):
         return get_training_type_for_activity_with_cursor(cur, activity_type, profile_id)
 
 
-@router.get("/uncategorized")
-def list_uncategorized_activities(x_profile_id: Optional[str]=Header(default=None), session: dict=Depends(require_auth)):
-    """Get activities without assigned training type, grouped by activity_type."""
-    pid = get_pid(x_profile_id)
-    with get_db() as conn:
-        cur = get_cursor(conn)
-        cur.execute("""
-            SELECT activity_type, COUNT(*) as count,
-                   MIN(date) as first_date, MAX(date) as last_date
-            FROM activity_log
-            WHERE profile_id=%s AND training_type_id IS NULL
-            GROUP BY activity_type
-            ORDER BY count DESC
-        """, (pid,))
-        return [r2d(r) for r in cur.fetchall()]
-
-
 @router.post("/bulk-categorize")
 def bulk_categorize_activities(
     data: dict,