feat: enhance recovery metrics and dashboard with sleep debt calculations and improved visualizations

- Introduced new constants for sleep debt calculations, including target hours and rolling window days.
- Added a function to calculate sleep debt over a specified window, aligning with KPI logic.
- Updated SQL queries in recovery chart payloads to ensure accurate data retrieval for sleep metrics.
- Enhanced the RecoveryDashboardOverview component to reflect changes in sleep debt visualization and descriptions, improving user understanding of metrics.
- Refined chart labels and notes for clarity, ensuring users can easily interpret recovery and sleep data.

backend/data_layer/recovery_chart_payloads.py

@@ -11,12 +11,15 @@ from typing import Any, Dict, Optional, Set
 
 from db import get_db, get_cursor
 from data_layer.recovery_metrics import (
+    SLEEP_DEBT_ROLLING_WINDOW_DAYS,
+    SLEEP_DEBT_TARGET_HOURS_DEFAULT,
     calculate_hrv_vs_baseline_pct,
     calculate_recovery_score_v2,
     calculate_rhr_vs_baseline_pct,
     calculate_sleep_debt_hours,
     get_sleep_duration_data,
     get_sleep_quality_data,
+    sleep_debt_sum_hours_in_window,
 )
 from data_layer.utils import calculate_confidence, safe_float, serialize_dates
 from data_layer.vital_signs_assessment import build_vital_items_from_rows
@@ -86,7 +89,7 @@ def build_recovery_score_chart_payload(profile_id: str, days: int) -> Dict[str,
             "labels": labels,
             "datasets": [
                 {
-                    "label": "Recovery Score (proxy)",
+                    "label": "HRV (ms, auf 0–100 begrenzt) — nicht der KPI Recovery-Score",
                     "data": values,
                     "borderColor": "#1D9E75",
                     "backgroundColor": "rgba(29, 158, 117, 0.1)",
@@ -101,7 +104,10 @@ def build_recovery_score_chart_payload(profile_id: str, days: int) -> Dict[str,
                 "confidence": calculate_confidence(len(rows), days, "general"),
                 "data_points": len(rows),
                 "current_score": current_score,
-                "note": "Score based on HRV proxy; true recovery score calculation in development",
+                "chart_series_kind": "hrv_ms_clamped",
+                "kpi_score_source": "calculate_recovery_score_v2",
+                "note": "Kurve = HRV-Rohwert (ms) begrenzt auf 0–100, nur Verlaufsorientierung. "
+                "KPI-Kachel «Recovery-Score» = gewichteter Score (HRV, RHR, Schlaf, …).",
             }
         ),
     }
@@ -293,7 +299,9 @@ def build_sleep_debt_chart_payload(profile_id: str, days: int) -> Dict[str, Any]
             },
         }
 
-    cutoff = (datetime.now() - timedelta(days=days)).strftime("%Y-%m-%d")
+    chart_cutoff = (datetime.now() - timedelta(days=days)).date()
+    # Historie vor dem Chart-Fenster, damit das rollierende 14-Tage-Fenster früh korrekt gefüllt ist
+    ext_cutoff = (datetime.now() - timedelta(days=days + SLEEP_DEBT_ROLLING_WINDOW_DAYS + 3)).strftime("%Y-%m-%d")
 
     with get_db() as conn:
         cur = get_cursor(conn)
@@ -301,12 +309,20 @@ def build_sleep_debt_chart_payload(profile_id: str, days: int) -> Dict[str, Any]
             """SELECT date, duration_minutes
                FROM sleep_log
                WHERE profile_id=%s AND date >= %s
-               ORDER BY date""",
-            (profile_id, cutoff),
+               AND duration_minutes IS NOT NULL
+               ORDER BY date ASC""",
+            (profile_id, ext_cutoff),
         )
-        rows = cur.fetchall()
+        all_rows = [dict(r) for r in cur.fetchall()]
 
-    if not rows:
+    visible = []
+    for r in all_rows:
+        rd = r.get("date")
+        d = rd.date() if isinstance(rd, datetime) else rd
+        if d >= chart_cutoff:
+            visible.append(r)
+
+    if not visible:
         return {
             "chart_type": "line",
             "data": {"labels": [], "datasets": []},
@@ -317,17 +333,13 @@ def build_sleep_debt_chart_payload(profile_id: str, days: int) -> Dict[str, Any]
             },
         }
 
-    labels = [row["date"].isoformat() for row in rows]
-
-    target_hours = 8.0
-    cumulative_debt = 0.0
+    labels = []
     debt_values = []
-
-    for row in rows:
-        actual_hours = safe_float(row["duration_minutes"]) / 60 if row["duration_minutes"] else 0
-        daily_deficit = target_hours - actual_hours
-        cumulative_debt += daily_deficit
-        debt_values.append(cumulative_debt)
+    for r in visible:
+        rd = r.get("date")
+        end_d = rd.date() if isinstance(rd, datetime) else rd
+        labels.append(end_d.isoformat() if hasattr(end_d, "isoformat") else str(end_d))
+        debt_values.append(sleep_debt_sum_hours_in_window(all_rows, end_d))
 
     return {
         "chart_type": "line",
@@ -335,7 +347,7 @@ def build_sleep_debt_chart_payload(profile_id: str, days: int) -> Dict[str, Any]
             "labels": labels,
             "datasets": [
                 {
-                    "label": "Schlafschuld (Stunden)",
+                    "label": f"Schlafschuld (h), rollierend {SLEEP_DEBT_ROLLING_WINDOW_DAYS} Tage — wie KPI",
                     "data": debt_values,
                     "borderColor": "#EF4444",
                     "backgroundColor": "rgba(239, 68, 68, 0.1)",
@@ -347,10 +359,14 @@ def build_sleep_debt_chart_payload(profile_id: str, days: int) -> Dict[str, Any]
         },
         "metadata": serialize_dates(
             {
-                "confidence": calculate_confidence(len(rows), days, "general"),
-                "data_points": len(rows),
+                "confidence": calculate_confidence(len(visible), days, "general"),
+                "data_points": len(visible),
                 "current_debt_hours": round(float(current_debt), 1),
-                "final_debt_hours": round(float(cumulative_debt), 1),
+                "sleep_debt_target_hours_per_night": SLEEP_DEBT_TARGET_HOURS_DEFAULT,
+                "rolling_window_days": SLEEP_DEBT_ROLLING_WINDOW_DAYS,
+                "note": "Gleiche Formel wie KPI: Summe der nächtlichen Defizite vs. "
+                f"{SLEEP_DEBT_TARGET_HOURS_DEFAULT} h/Nacht im rollierenden {SLEEP_DEBT_ROLLING_WINDOW_DAYS}-Tage-Fenster "
+                "(jeder Punkt = Fensterende an dem Datum). Ziel aktuell nicht in den Profileinstellungen änderbar.",
             }
         ),
     }

backend/data_layer/recovery_metrics.py

@@ -21,6 +21,11 @@ from datetime import datetime, timedelta, date
 from db import get_db, get_cursor
 from data_layer.utils import calculate_confidence, safe_float, safe_int
 
+# ── Schlafschuld (KPI + Charts): eine Zielschlafdauer, bis ein Profil-Feld existiert
+SLEEP_DEBT_TARGET_HOURS_DEFAULT = 7.5
+SLEEP_DEBT_ROLLING_WINDOW_DAYS = 14
+SLEEP_DEBT_MIN_NIGHTS_FOR_KPI = 10
+
 
 def _parse_sleep_segments(raw: Any) -> Optional[List[dict]]:
     """JSONB kann dict/list/str sein; ungültig → None."""
@@ -744,34 +749,70 @@ def calculate_sleep_avg_duration_7d(profile_id: str) -> Optional[float]:
         return round(avg_hours, 1)
 
 
+def _row_date_as_date(d: Any) -> Optional[date]:
+    if d is None:
+        return None
+    if isinstance(d, datetime):
+        return d.date()
+    if isinstance(d, date):
+        return d
+    return None
+
+
+def sleep_debt_sum_hours_in_window(
+    night_rows: List[Dict[str, Any]],
+    window_end: date,
+    *,
+    target_hours: float = SLEEP_DEBT_TARGET_HOURS_DEFAULT,
+    window_days: int = SLEEP_DEBT_ROLLING_WINDOW_DAYS,
+    min_nights: int = SLEEP_DEBT_MIN_NIGHTS_FOR_KPI,
+) -> Optional[float]:
+    """
+    Summe der nächtlichen Defizite (nur Unter-Ziel, kein „Überschuss-Guthaben“) im Fenster
+    (window_end − window_days … window_end], Kalendertage).
+    Gleiche Logik wie KPI calculate_sleep_debt_hours für window_end = heute.
+    """
+    start = window_end - timedelta(days=window_days)
+    tmin = target_hours * 60.0
+    total_min = 0.0
+    nights = 0
+    for row in night_rows:
+        rd = _row_date_as_date(row.get("date"))
+        if rd is None or rd < start or rd > window_end:
+            continue
+        dm = row.get("duration_minutes")
+        if dm is None:
+            continue
+        nights += 1
+        total_min += max(0.0, tmin - float(dm))
+    if nights < min_nights:
+        return None
+    return round(total_min / 60.0, 1)
+
+
 def calculate_sleep_debt_hours(profile_id: str) -> Optional[float]:
     """
-    Calculate accumulated sleep debt (hours) last 14 days
-    Assumes 7.5h target per night
+    Aufsummierte Schlafschuld (h) der letzten 14 Kalendertage bis heute —
+    Ziel pro Nacht: SLEEP_DEBT_TARGET_HOURS_DEFAULT (aktuell nicht profilkonfigurierbar).
     """
-    target_hours = 7.5
-
+    today = datetime.now().date()
     with get_db() as conn:
         cur = get_cursor(conn)
-        cur.execute("""
-            SELECT duration_minutes
+        cur.execute(
+            """
+            SELECT date, duration_minutes
             FROM sleep_log
             WHERE profile_id = %s
-              AND date >= CURRENT_DATE - INTERVAL '14 days'
+              AND date >= %s::date - INTERVAL '14 days'
+              AND date <= %s::date
               AND duration_minutes IS NOT NULL
             ORDER BY date DESC
-        """, (profile_id,))
+            """,
+            (profile_id, today, today),
+        )
+        rows = [dict(r) for r in cur.fetchall()]
 
-        sleep_data = [row['duration_minutes'] for row in cur.fetchall()]
-
-        if len(sleep_data) < 10:  # Need at least 10 days
-            return None
-
-        # Calculate cumulative debt
-        total_debt_min = sum(max(0, (target_hours * 60) - sleep_min) for sleep_min in sleep_data)
-        debt_hours = total_debt_min / 60
-
-        return round(debt_hours, 1)
+    return sleep_debt_sum_hours_in_window(rows, today)
 
 
 def calculate_sleep_regularity_proxy(profile_id: str) -> Optional[float]:

frontend/src/components/RecoveryDashboardOverview.jsx

@@ -331,11 +331,19 @@ export default function RecoveryDashboardOverview({
                 fontSize: 11,
               }}
             />
-            <Line type="monotone" dataKey="score" stroke="#1D9E75" strokeWidth={2} name="Recovery Score" dot={{ r: 2 }} />
+            <Line
+              type="monotone"
+              dataKey="score"
+              stroke="#1D9E75"
+              strokeWidth={2}
+              name={recoveryData.data?.datasets?.[0]?.label || 'HRV (Proxy)'}
+              dot={{ r: 2 }}
+            />
           </LineChart>
         </ResponsiveContainer>
-        <div style={{ marginTop: 8, fontSize: 10, color: 'var(--text3)', textAlign: 'center' }}>
-          Aktuell: {recoveryData.metadata.current_score}/100 · {recoveryData.metadata.data_points} Einträge
+        <div style={{ marginTop: 8, fontSize: 10, color: 'var(--text3)', textAlign: 'center', lineHeight: 1.45 }}>
+          KPI Recovery-Score (aktuell): <strong>{recoveryData.metadata.current_score}/100</strong> · Datenpunkte Kurve:{' '}
+          {recoveryData.metadata.data_points}
         </div>
       </>
     )
@@ -479,7 +487,15 @@ export default function RecoveryDashboardOverview({
                 fontSize: 11,
               }}
             />
-            <Line type="monotone" dataKey="debt" stroke="#EF4444" strokeWidth={2} name="Schlafschuld (h)" dot={{ r: 2 }} />
+            <Line
+              type="monotone"
+              dataKey="debt"
+              stroke="#EF4444"
+              strokeWidth={2}
+              name={debtData.data?.datasets?.[0]?.label || 'Schlafschuld (h)'}
+              dot={{ r: 2 }}
+              connectNulls
+            />
           </LineChart>
         </ResponsiveContainer>
         <div style={{ marginTop: 8, fontSize: 10, color: 'var(--text3)', textAlign: 'center' }}>
@@ -680,8 +696,11 @@ export default function RecoveryDashboardOverview({
         hint="Recovery-Score und Schlaf im gleichen Zeitraum wie die Kennzahlen oben."
       />
       <ChartCard
-        title="Recovery Score"
-        description="0–100, Verlauf im Chart-Fenster. Höher ist in der Regel günstiger."
+        title="HRV-Verlauf (kein Recovery-Score)"
+        description={
+          'Kurve = HRV-Rohwert (ms), auf 0–100 begrenzt — nur zur Einordnung des Verlaufs. ' +
+          'Die KPI-Kachel «Recovery-Score» oben nutzt calculate_recovery_score_v2 (HRV, RHR, Schlaf, Last, …).'
+        }
       >
         {renderRecoveryScore()}
       </ChartCard>
@@ -695,7 +714,14 @@ export default function RecoveryDashboardOverview({
       >
         {renderSleepQuality()}
       </ChartCard>
-      <ChartCard title="Schlafschuld" description="Kumulierte Differenz zur Zielschlafdauer.">
+      <ChartCard
+        title="Schlafschuld"
+        description={
+          'Gleiche Berechnung wie die KPI: Summe der nächtlichen Defizite gegenüber 7,5 h/Nacht im rollierenden 14-Tage-Fenster ' +
+          '(Ziel derzeit fest im Code, nicht in den Einstellungen). Jeder Punkt = Schlafschuld mit Fensterende an diesem Datum — ' +
+          'entspricht der KPI, wenn der letzte Punkt die letzte erfasste Nacht ist.'
+        }
+      >
         {renderSleepDebt()}
       </ChartCard>