feat: add nutrition entry editing and import history

Features:
- Import history panel showing all CSV imports with date, count, and range
- Edit/delete functionality for nutrition entries (inline editing)
- New backend endpoints: GET /import-history, PUT /{id}, DELETE /{id}

UI Changes:
- Import history displayed under import panel
- "Daten" tab now has edit/delete buttons per entry
- Inline form for editing macros (kcal, protein, fat, carbs)
- Confirmation dialog for deletion

Backend:
- nutrition.py: Added import_history, update_nutrition, delete_nutrition endpoints
- Groups imports by created date to show history

Frontend:
- NutritionPage: New DataTab and ImportHistory components
- api.js: Added nutritionImportHistory, updateNutrition, deleteNutrition

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/routers/nutrition.py

@@ -163,3 +163,61 @@ def nutrition_weekly(weeks: int=16, x_profile_id: Optional[str]=Header(default=N
         def avg(k): return round(sum(float(e.get(k) or 0) for e in en)/n,1)
         result.append({'week':wk,'days':n,'kcal':avg('kcal'),'protein_g':avg('protein_g'),'fat_g':avg('fat_g'),'carbs_g':avg('carbs_g')})
     return result
+
+
+@router.get("/import-history")
+def import_history(x_profile_id: Optional[str]=Header(default=None), session: dict=Depends(require_auth)):
+    """Get import history by grouping entries by created timestamp."""
+    pid = get_pid(x_profile_id)
+    with get_db() as conn:
+        cur = get_cursor(conn)
+        cur.execute("""
+            SELECT
+                DATE(created) as import_date,
+                COUNT(*) as count,
+                MIN(date) as date_from,
+                MAX(date) as date_to,
+                MAX(created) as last_created
+            FROM nutrition_log
+            WHERE profile_id=%s AND source='csv'
+            GROUP BY DATE(created)
+            ORDER BY DATE(created) DESC
+        """, (pid,))
+        return [r2d(r) for r in cur.fetchall()]
+
+
+@router.put("/{entry_id}")
+def update_nutrition(entry_id: str, kcal: float, protein_g: float, fat_g: float, carbs_g: float,
+                     x_profile_id: Optional[str]=Header(default=None), session: dict=Depends(require_auth)):
+    """Update nutrition entry macros."""
+    pid = get_pid(x_profile_id)
+    with get_db() as conn:
+        cur = get_cursor(conn)
+        # Verify ownership
+        cur.execute("SELECT id FROM nutrition_log WHERE id=%s AND profile_id=%s", (entry_id, pid))
+        if not cur.fetchone():
+            raise HTTPException(404, "Eintrag nicht gefunden")
+
+        cur.execute("""
+            UPDATE nutrition_log
+            SET kcal=%s, protein_g=%s, fat_g=%s, carbs_g=%s
+            WHERE id=%s AND profile_id=%s
+        """, (round(kcal,1), round(protein_g,1), round(fat_g,1), round(carbs_g,1), entry_id, pid))
+
+    return {"success": True}
+
+
+@router.delete("/{entry_id}")
+def delete_nutrition(entry_id: str, x_profile_id: Optional[str]=Header(default=None), session: dict=Depends(require_auth)):
+    """Delete nutrition entry."""
+    pid = get_pid(x_profile_id)
+    with get_db() as conn:
+        cur = get_cursor(conn)
+        # Verify ownership
+        cur.execute("SELECT id FROM nutrition_log WHERE id=%s AND profile_id=%s", (entry_id, pid))
+        if not cur.fetchone():
+            raise HTTPException(404, "Eintrag nicht gefunden")
+
+        cur.execute("DELETE FROM nutrition_log WHERE id=%s AND profile_id=%s", (entry_id, pid))
+
+    return {"success": True}

frontend/src/pages/NutritionPage.jsx

@@ -18,6 +18,220 @@ function rollingAvg(arr, key, window=7) {
   })
 }
 
+// ── Data Tab (Editable Entry List) ───────────────────────────────────────────
+function DataTab({ entries, onUpdate }) {
+  const [editId, setEditId] = useState(null)
+  const [editValues, setEditValues] = useState({})
+  const [saving, setSaving] = useState(false)
+  const [error, setError] = useState(null)
+
+  const startEdit = (e) => {
+    setEditId(e.id)
+    setEditValues({
+      kcal: e.kcal || 0,
+      protein_g: e.protein_g || 0,
+      fat_g: e.fat_g || 0,
+      carbs_g: e.carbs_g || 0
+    })
+  }
+
+  const cancelEdit = () => {
+    setEditId(null)
+    setEditValues({})
+    setError(null)
+  }
+
+  const saveEdit = async (id) => {
+    setSaving(true)
+    setError(null)
+    try {
+      await nutritionApi.updateNutrition(
+        id,
+        editValues.kcal,
+        editValues.protein_g,
+        editValues.fat_g,
+        editValues.carbs_g
+      )
+      setEditId(null)
+      setEditValues({})
+      onUpdate()
+    } catch(e) {
+      setError('Speichern fehlgeschlagen: ' + e.message)
+    } finally {
+      setSaving(false)
+    }
+  }
+
+  const deleteEntry = async (id, date) => {
+    if (!confirm(`Eintrag vom ${dayjs(date).format('DD.MM.YYYY')} wirklich löschen?`)) return
+    try {
+      await nutritionApi.deleteNutrition(id)
+      onUpdate()
+    } catch(e) {
+      setError('Löschen fehlgeschlagen: ' + e.message)
+    }
+  }
+
+  if (entries.length === 0) {
+    return (
+      <div className="card section-gap">
+        <div className="card-title">Alle Einträge (0)</div>
+        <p className="muted">Noch keine Ernährungsdaten. Importiere FDDB CSV oben.</p>
+      </div>
+    )
+  }
+
+  return (
+    <div className="card section-gap">
+      <div className="card-title">Alle Einträge ({entries.length})</div>
+      {error && (
+        <div style={{padding:'8px 12px',background:'#FCEBEB',borderRadius:8,fontSize:13,color:'#D85A30',marginBottom:12}}>
+          {error}
+        </div>
+      )}
+      {entries.map((e, i) => {
+        const isEditing = editId === e.id
+        return (
+          <div key={e.id || i} style={{
+            borderBottom: i < entries.length - 1 ? '1px solid var(--border)' : 'none',
+            padding: '12px 0'
+          }}>
+            {!isEditing ? (
+              <>
+                <div style={{display:'flex', justifyContent:'space-between', alignItems:'center', marginBottom:6}}>
+                  <strong style={{fontSize:14}}>{dayjs(e.date).format('dd, DD. MMMM YYYY')}</strong>
+                  <div style={{display:'flex',gap:6}}>
+                    <button onClick={() => startEdit(e)}
+                      style={{padding:'4px 10px',fontSize:11,borderRadius:6,border:'1px solid var(--border2)',
+                        background:'var(--surface)',color:'var(--text2)',cursor:'pointer'}}>
+                      ✏️ Bearbeiten
+                    </button>
+                    <button onClick={() => deleteEntry(e.id, e.date)}
+                      style={{padding:'4px 10px',fontSize:11,borderRadius:6,border:'1px solid #D85A30',
+                        background:'#FCEBEB',color:'#D85A30',cursor:'pointer'}}>
+                      🗑️
+                    </button>
+                  </div>
+                </div>
+                <div style={{fontSize:13, fontWeight:600, color:'#EF9F27',marginBottom:6}}>
+                  {Math.round(e.kcal || 0)} kcal
+                </div>
+                <div style={{display:'flex', gap:12, fontSize:12, color:'var(--text2)'}}>
+                  <span>🥩 Protein: <strong>{Math.round(e.protein_g || 0)}g</strong></span>
+                  <span>🫙 Fett: <strong>{Math.round(e.fat_g || 0)}g</strong></span>
+                  <span>🍞 Kohlenhydrate: <strong>{Math.round(e.carbs_g || 0)}g</strong></span>
+                </div>
+                {e.source && (
+                  <div style={{fontSize:10, color:'var(--text3)', marginTop:4}}>
+                    Quelle: {e.source}
+                  </div>
+                )}
+              </>
+            ) : (
+              <>
+                <div style={{marginBottom:8}}>
+                  <strong style={{fontSize:14}}>{dayjs(e.date).format('dd, DD. MMMM YYYY')}</strong>
+                </div>
+                <div style={{display:'grid',gridTemplateColumns:'1fr 1fr',gap:8,marginBottom:10}}>
+                  <div>
+                    <label style={{fontSize:11,color:'var(--text3)',display:'block',marginBottom:4}}>Kalorien</label>
+                    <input type="number" className="form-input" value={editValues.kcal}
+                      onChange={e => setEditValues({...editValues, kcal: parseFloat(e.target.value)||0})}
+                      style={{width:'100%'}}/>
+                  </div>
+                  <div>
+                    <label style={{fontSize:11,color:'var(--text3)',display:'block',marginBottom:4}}>Protein (g)</label>
+                    <input type="number" className="form-input" value={editValues.protein_g}
+                      onChange={e => setEditValues({...editValues, protein_g: parseFloat(e.target.value)||0})}
+                      style={{width:'100%'}}/>
+                  </div>
+                  <div>
+                    <label style={{fontSize:11,color:'var(--text3)',display:'block',marginBottom:4}}>Fett (g)</label>
+                    <input type="number" className="form-input" value={editValues.fat_g}
+                      onChange={e => setEditValues({...editValues, fat_g: parseFloat(e.target.value)||0})}
+                      style={{width:'100%'}}/>
+                  </div>
+                  <div>
+                    <label style={{fontSize:11,color:'var(--text3)',display:'block',marginBottom:4}}>Kohlenhydrate (g)</label>
+                    <input type="number" className="form-input" value={editValues.carbs_g}
+                      onChange={e => setEditValues({...editValues, carbs_g: parseFloat(e.target.value)||0})}
+                      style={{width:'100%'}}/>
+                  </div>
+                </div>
+                <div style={{display:'flex',gap:8}}>
+                  <button onClick={() => saveEdit(e.id)} disabled={saving}
+                    className="btn btn-primary" style={{flex:1}}>
+                    {saving ? 'Speichere…' : '✓ Speichern'}
+                  </button>
+                  <button onClick={cancelEdit} disabled={saving}
+                    className="btn btn-secondary" style={{flex:1}}>
+                    Abbrechen
+                  </button>
+                </div>
+              </>
+            )}
+          </div>
+        )
+      })}
+    </div>
+  )
+}
+
+// ── Import History ────────────────────────────────────────────────────────────
+function ImportHistory() {
+  const [history, setHistory] = useState([])
+  const [loading, setLoading] = useState(true)
+
+  useEffect(() => {
+    const load = async () => {
+      try {
+        const data = await nutritionApi.nutritionImportHistory()
+        setHistory(Array.isArray(data) ? data : [])
+      } catch(e) {
+        console.error('Failed to load import history:', e)
+      } finally {
+        setLoading(false)
+      }
+    }
+    load()
+  }, [])
+
+  if (loading) return null
+  if (!history.length) return null
+
+  return (
+    <div className="card section-gap">
+      <div className="card-title">Import-Historie</div>
+      <div style={{display:'flex',flexDirection:'column',gap:8}}>
+        {history.map((h, i) => (
+          <div key={i} style={{
+            padding: '10px 12px',
+            background: 'var(--surface2)',
+            borderRadius: 8,
+            borderLeft: '3px solid var(--accent)',
+            fontSize: 13
+          }}>
+            <div style={{display:'flex',justifyContent:'space-between',marginBottom:4}}>
+              <strong>{dayjs(h.import_date).format('DD.MM.YYYY')}</strong>
+              <span style={{color:'var(--text3)',fontSize:11}}>
+                {dayjs(h.last_created).format('HH:mm')} Uhr
+              </span>
+            </div>
+            <div style={{color:'var(--text2)',fontSize:12}}>
+              <span>{h.count} {h.count === 1 ? 'Eintrag' : 'Einträge'}</span>
+              {h.date_from && h.date_to && (
+                <span style={{marginLeft:8,color:'var(--text3)'}}>
+                  ({dayjs(h.date_from).format('DD.MM.YY')} – {dayjs(h.date_to).format('DD.MM.YY')})
+                </span>
+              )}
+            </div>
+          </div>
+        ))}
+      </div>
+    </div>
+  )
+}
+
 // ── Import Panel ──────────────────────────────────────────────────────────────
 function ImportPanel({ onImported }) {
   const fileRef  = useRef()
@@ -337,7 +551,7 @@ export default function NutritionPage() {
         nutritionApi.nutritionCorrelations(),
         nutritionApi.nutritionWeekly(16),
         nutritionApi.listNutrition(365),  // BUG-002 fix: load raw entries
-        api.getActiveProfile(),
+        nutritionApi.getActiveProfile(),
       ])
       setCorr(Array.isArray(corr)?corr:[])
       setWeekly(Array.isArray(wkly)?wkly:[])
@@ -355,6 +569,7 @@ export default function NutritionPage() {
       <h1 className="page-title">Ernährung</h1>
 
       <ImportPanel onImported={load}/>
+      <ImportHistory/>
 
       {loading && <div className="empty-state"><div className="spinner"/></div>}
 
@@ -378,35 +593,7 @@ export default function NutritionPage() {
           </div>
 
           {tab==='data' && (
-            <div className="card section-gap">
-              <div className="card-title">Alle Einträge ({entries.length})</div>
-              {entries.length === 0 && (
-                <p className="muted">Noch keine Ernährungsdaten. Importiere FDDB CSV oben.</p>
-              )}
-              {entries.map((e, i) => (
-                <div key={e.id || i} style={{
-                  borderBottom: i < entries.length - 1 ? '1px solid var(--border)' : 'none',
-                  padding: '10px 0'
-                }}>
-                  <div style={{display:'flex', justifyContent:'space-between', alignItems:'center', marginBottom:4}}>
-                    <strong style={{fontSize:14}}>{dayjs(e.date).format('dd, DD. MMMM YYYY')}</strong>
-                    <div style={{fontSize:13, fontWeight:600, color:'#EF9F27'}}>
-                      {Math.round(e.kcal || 0)} kcal
-                    </div>
-                  </div>
-                  <div style={{display:'flex', gap:12, fontSize:12, color:'var(--text2)'}}>
-                    <span>🥩 Protein: <strong>{Math.round(e.protein_g || 0)}g</strong></span>
-                    <span>🫙 Fett: <strong>{Math.round(e.fat_g || 0)}g</strong></span>
-                    <span>🍞 Kohlenhydrate: <strong>{Math.round(e.carbs_g || 0)}g</strong></span>
-                  </div>
-                  {e.source && (
-                    <div style={{fontSize:10, color:'var(--text3)', marginTop:2}}>
-                      Quelle: {e.source}
-                    </div>
-                  )}
-                </div>
-              ))}
-            </div>
+            <DataTab entries={entries} onUpdate={load}/>
           )}
 
           {tab==='overview' && (

frontend/src/utils/api.js

@@ -82,6 +82,9 @@ export const api = {
   listNutrition:          (l=365) => req(`/nutrition?limit=${l}`),
   nutritionCorrelations:  ()      => req('/nutrition/correlations'),
   nutritionWeekly:        (w=16)  => req(`/nutrition/weekly?weeks=${w}`),
+  nutritionImportHistory: ()      => req('/nutrition/import-history'),
+  updateNutrition:        (id,kcal,protein,fat,carbs) => req(`/nutrition/${id}?kcal=${kcal}&protein_g=${protein}&fat_g=${fat}&carbs_g=${carbs}`,{method:'PUT'}),
+  deleteNutrition:        (id)    => req(`/nutrition/${id}`,{method:'DELETE'}),
 
   // Stats & AI
   getStats:        ()    => req('/stats'),