Realistische Demo-Daten (12 Wochen, 49 Sessions) + Roadmap + README-Verweis

- demo-data.json neu generiert: 12 Wochen Push/Pull/Legs mit Plateau-
  Phasen, Deload-Woche, ausgelassenen Trainingstagen, Reps-Streuung,
  nicht abgehakten Saetzen und Notizen; dazu 12 Laeufe und 5 Fahrten
- ROADMAP.md: interne Roadmap in 4 Phasen (Inhalt in der App bearbeiten,
  herstellerunabhaengige Info-Texte mit Bildern/Schritten, Plugin-System
  mit Ollama/Cloud-Coach, Wearable-Import, CLI-Harness, Volumen/1RM,
  PWA, a11y)
- README: Roadmap-Sektion
- test_auth: erwartete Demo-Zaehler dynamisch aus der Datei berechnet
- Tests: 158 Checks gruen (39+18+43+32+26)

tests/test_auth.py

@@ -147,7 +147,14 @@ def main():
         st, imp = req("POST", "/api/import",
                       {"format": "trainingsplan-export-v2",
                        "data": json.dumps(demo)}, token=token_b)
-        check("Demo-Import in Berta", st == 200 and imp["created"] == 22, imp)
+        demo_sessions = len(demo["sessions"])
+        demo_gym = sum(1 for s in demo["sessions"] if s["activity"] == "gym")
+        demo_ex_dates = len({s["date"] for s in demo["sessions"]
+                             for e in s.get("entries", [])
+                             if e.get("exercise") == "Push/Bankdrücken KH (je Hand)"
+                             and e.get("weight")})
+        check("Demo-Import in Berta", st == 200
+              and imp["created"] == demo_sessions, imp)
 
         # --- Berta trainiert selbst -------------------------------------------
         st, sess_b = req("POST", "/api/sessions",
@@ -161,8 +168,8 @@ def main():
 
         st, done_b = req("GET", "/api/sessions?status=done", token=token_b)
         st, done_a = req("GET", "/api/sessions?status=done", token=token_a)
-        check("Isolation: B sieht 23 eigene Sessions (22 Demo + 1)",
-              len(done_b) == 23, len(done_b))
+        check("Isolation: B sieht alle Demo-Sessions + 1 eigene",
+              len(done_b) == demo_sessions + 1, len(done_b))
         check("Isolation: A sieht seine 1 Session (nicht B)",
               len(done_a) == 1, len(done_a))
 
@@ -191,22 +198,23 @@ def main():
 
         # --- Workouts-API -----------------------------------------------------
         st, wo_b = req("GET", "/api/workouts", token=token_b)
-        check("Workouts-API: 23 Workouts", st == 200 and len(wo_b) == 23, len(wo_b))
+        check("Workouts-API: alle Demo-Workouts + eigene",
+              st == 200 and len(wo_b) == demo_sessions + 1, len(wo_b))
         w = wo_b[0]  # neueste Session = Berta heute
         check("Workouts-API: Shape", w["activity_name"] == "Gym (Kraft)"
               and w["day"] == "Push" and w["duration_min"] is not None
               and w["exercises"][0]["name"] == "Bankdrücken KH (je Hand)"
               and w["exercises"][0]["sets"][0]["weight"] == "40", w)
         st, wo_b = req("GET", "/api/workouts?activity=gym", token=token_b)
-        check("Workouts nach Import (gym): 15 Demo + 1 eigene", len(wo_b) == 16,
-              len(wo_b))
+        check("Workouts nach Import (gym): Demo + 1 eigene",
+              len(wo_b) == demo_gym + 1, len(wo_b))
         st, wo_a = req("GET", "/api/workouts", token=token_a)
         check("A bleibt unberuehrt vom Import", len(wo_a) == 1, len(wo_a))
         st, stats = req("GET", "/api/stats?exercise="
                         + urllib.parse.quote("Push/Bankdrücken KH (je Hand)"),
                         token=token_b)
         check("Statistik aus Demo-Daten + eigene Session",
-              st == 200 and len(stats) == 6
+              st == 200 and len(stats) == demo_ex_dates + 1
               and stats[0]["weight"] < stats[-1]["weight"]
               and stats[-1]["weight"] == 40, stats)