Enhance Exercise Progression Graph Panel and Path Builder with New Features

- Added `ProgressionChainEditor` to the Exercise Progression Graph Panel for improved management of exercise chains.
- Refactored state management to utilize `useRef` for chain editor references and removed unused sequence step logic.
- Introduced a path insert notice in the Exercise Progression Path Builder to inform users about unsaved changes.
- Updated UI elements to enhance clarity regarding the status of paths before saving.
- Incremented application version to reflect these updates.

frontend/src/components/ExerciseProgressionGraphPanel.jsx

@@ -2,7 +2,7 @@
  * Progressionsgraphen: Sequenz-Editor (mehrere Nachfolger auf einmal), Ketten-Ansicht,
  * Varianten als eigene Knoten-Endpunkte, Schwester-Kanten gesondert, Tabelle als Fallback.
  */
-import React, { useCallback, useEffect, useMemo, useState } from 'react'
+import React, { useCallback, useEffect, useMemo, useRef, useState } from 'react'
 import { Link } from 'react-router-dom'
 import api from '../utils/api'
 import SkillProfilePanel from './skills/SkillProfilePanel'
@@ -10,6 +10,7 @@ import { useAuth } from '../context/AuthContext'
 import { getTenantClubDependencyKey } from '../utils/activeClub'
 import ExercisePickerModal from './ExercisePickerModal'
 import ExerciseProgressionPathBuilder from './ExerciseProgressionPathBuilder'
+import ProgressionChainEditor from './ProgressionChainEditor'
 import { EXERCISE_VISIBILITY_FIELD_LABEL } from '../constants/exerciseGovernanceLabels'
 
 const VIS_OPTIONS = [
@@ -92,10 +93,6 @@ function maximalLinearChains(nextEdges) {
   return chains
 }
 
-function emptySeqStep() {
-  return { exerciseId: null, exerciseTitle: '', variantId: null, variants: [] }
-}
-
 function emptyEndpoint() {
   return { exerciseId: null, exerciseTitle: '', variantId: null, variants: [] }
 }
@@ -126,9 +123,8 @@ export default function ExerciseProgressionGraphPanel({
   const [metaDescription, setMetaDescription] = useState('')
   const [metaVisibility, setMetaVisibility] = useState('private')
 
-  const [sequenceSteps, setSequenceSteps] = useState([emptySeqStep(), emptySeqStep()])
-  const [sequenceBulkNotes, setSequenceBulkNotes] = useState('')
   const [pickContext, setPickContext] = useState(null)
+  const chainEditorRef = useRef(null)
 
   const [relationKind, setRelationKind] = useState('progression')
   const [firstEp, setFirstEp] = useState(emptyEndpoint)
@@ -138,7 +134,6 @@ export default function ExerciseProgressionGraphPanel({
   const [filterAnchorOnly, setFilterAnchorOnly] = useState(!!anchorExerciseId)
   const [editingEdgeNotes, setEditingEdgeNotes] = useState(null)
   const [notesDraft, setNotesDraft] = useState('')
-  const [uiTab, setUiTab] = useState('overview')
   const [skillProfileData, setSkillProfileData] = useState(null)
   const [skillProfileLoading, setSkillProfileLoading] = useState(false)
   const [skillProfileError, setSkillProfileError] = useState('')
@@ -343,81 +338,6 @@ export default function ExerciseProgressionGraphPanel({
     }
   }
 
-  const patchSeqStep = (idx, patch) => {
-    setSequenceSteps((prev) => prev.map((s, i) => (i === idx ? { ...s, ...patch } : s)))
-  }
-
-  const addSeqStep = () => setSequenceSteps((prev) => [...prev, emptySeqStep()])
-
-  const removeSeqStep = (idx) => {
-    setSequenceSteps((prev) => {
-      if (prev.length <= 2) return prev
-      return prev.filter((_, i) => i !== idx)
-    })
-  }
-
-  const moveSeqStep = (idx, dir) => {
-    setSequenceSteps((prev) => {
-      const j = idx + dir
-      if (j < 0 || j >= prev.length) return prev
-      const next = [...prev]
-      const t = next[idx]
-      next[idx] = next[j]
-      next[j] = t
-      return next
-    })
-  }
-
-  const submitSequence = async () => {
-    if (!selectedGraphId) {
-      alert('Zuerst einen Graphen wählen.')
-      return
-    }
-    const steps = sequenceSteps.filter((s) => s.exerciseId != null)
-    if (steps.length < 2) {
-      alert('Mindestens zwei Schritte mit gewählter Übung.')
-      return
-    }
-    const n = steps.length - 1
-    const noteRaw = sequenceBulkNotes.trim()
-    const segment_notes = Array.from({ length: n }, () => (noteRaw ? noteRaw : null))
-
-    setBusy(true)
-    try {
-      await api.createExerciseProgressionSequence(selectedGraphId, {
-        steps: steps.map((s) => ({
-          exercise_id: s.exerciseId,
-          variant_id: s.variantId || null,
-        })),
-        segment_notes,
-      })
-      setSequenceBulkNotes('')
-      await refreshEdges(selectedGraphId)
-      alert(`${n} Nachfolger-Kante(n) angelegt.`)
-    } catch (err) {
-      alert(err.message || String(err))
-    } finally {
-      setBusy(false)
-    }
-  }
-
-  const deleteChain = async (edgeObjs) => {
-    if (!selectedGraphId || !edgeObjs?.length) return
-    if (!confirm(`${edgeObjs.length} Kante(n) dieser Reihe löschen?`)) return
-    setBusy(true)
-    try {
-      await api.deleteExerciseProgressionEdgesBatch(
-        selectedGraphId,
-        edgeObjs.map((e) => e.id),
-      )
-      await refreshEdges(selectedGraphId)
-    } catch (err) {
-      alert(err.message || String(err))
-    } finally {
-      setBusy(false)
-    }
-  }
-
   const handleAddEdge = async () => {
     if (!selectedGraphId) {
       alert('Zuerst einen Graphen wählen.')
@@ -507,13 +427,16 @@ export default function ExerciseProgressionGraphPanel({
     const variantId =
       ex.exercise_variant_id ?? ex.suggested_variant_id ?? null
 
-    if (pickContext?.kind === 'sequence') {
-      patchSeqStep(pickContext.index, {
-        exerciseId: ex.id,
-        exerciseTitle: title,
-        variantId: variantId != null ? Number(variantId) : null,
-        variants,
-      })
+    if (pickContext?.kind === 'chain') {
+      await chainEditorRef.current?.applyExercise(
+        pickContext.draftKey,
+        pickContext.nodeIndex,
+        {
+          ...ex,
+          variants,
+          exercise_variant_id: variantId,
+        },
+      )
       setPickContext(null)
       return
     }
@@ -555,10 +478,9 @@ export default function ExerciseProgressionGraphPanel({
       )}
 
       <p style={{ fontSize: '13px', color: 'var(--text2)', marginBottom: '16px' }}>
-        Pro Graph mehrere <strong>Reihen</strong> und <strong>Alternativen</strong>: eine{' '}
-        <strong>Sequenz</strong> legt automatisch alle Schritte Übung1 → Übung2 → … als Nachfolger-Kanten an.
-        Optional pro Schritt eine <strong>Variante</strong> — sie wirkt wie ein eigener Knoten. Verzweigungen und
-        Schwestern trennst du weiterhin mit Einzelkanten oder mehreren Sequenzen aus dem gleichen Knoten.
+        Ein Graph enthält eine oder mehrere <strong>Reihen</strong> (lineare Pfade Übung → Übung) sowie optional{' '}
+        <strong>Schwester-Alternativen</strong>. Reihen bearbeiten Sie direkt in der Liste; mit dem KI-Planer legen
+        Sie neue Pfade in vier Schritten an.
       </p>
 
       {loadErr && (
@@ -631,236 +553,30 @@ export default function ExerciseProgressionGraphPanel({
         </form>
       </div>
 
-      {selectedGraphId && (
-        <div className="card" style={{ marginBottom: '12px' }}>
-          <h3 style={{ marginTop: 0, fontSize: '1rem' }}>Graph bearbeiten</h3>
-          <div className="form-row">
-            <label className="form-label">Name</label>
-            <input className="form-input" value={metaName} onChange={(e) => setMetaName(e.target.value)} />
-          </div>
-          <div className="form-row">
-            <label className="form-label">Beschreibung</label>
-            <textarea
-              className="form-input"
-              rows={2}
-              value={metaDescription}
-              onChange={(e) => setMetaDescription(e.target.value)}
-            />
-          </div>
-          <div className="form-row">
-            <label className="form-label">{EXERCISE_VISIBILITY_FIELD_LABEL}</label>
-            <select className="form-input" value={metaVisibility} onChange={(e) => setMetaVisibility(e.target.value)}>
-              {filteredGraphVisOptions.map((o) => (
-                <option key={o.value} value={o.value}>
-                  {o.label}
-                </option>
-              ))}
-            </select>
-          </div>
-          <button type="button" className="btn btn-secondary" disabled={busy} onClick={handleSaveMeta}>
-            Metadaten speichern
-          </button>
-        </div>
+      {selectedGraphId && anchorExerciseId != null && (
+        <label style={{ display: 'flex', alignItems: 'center', gap: '8px', marginBottom: '12px', fontSize: '13px' }}>
+          <input
+            type="checkbox"
+            checked={filterAnchorOnly}
+            onChange={(e) => setFilterAnchorOnly(e.target.checked)}
+          />
+          Nur Reihen und Kanten, die diese Übung betreffen
+        </label>
       )}
 
       {selectedGraphId && (
-        <div
-          role="tablist"
-          style={{ display: 'flex', gap: '8px', marginBottom: '12px', flexWrap: 'wrap' }}
-          aria-label="Darstellung"
-        >
-          <button
-            type="button"
-            className={uiTab === 'overview' ? 'btn btn-primary' : 'btn btn-secondary'}
-            onClick={() => setUiTab('overview')}
-          >
-            Übersicht & Sequenz
-          </button>
-          <button
-            type="button"
-            className={uiTab === 'table' ? 'btn btn-primary' : 'btn btn-secondary'}
-            onClick={() => setUiTab('table')}
-          >
-            Alle Kanten (Tabelle)
-          </button>
-        </div>
-      )}
-
-      {selectedGraphId && uiTab === 'overview' && (
         <>
-          <SkillProfilePanel
-            title="Fähigkeiten entlang des Pfads"
-            hint="Alle Übungen als Knoten im Graph (Standardgewicht pro Übung; Intensität und Stufen aus der Übungsverknüpfung)."
-            profile={skillProfileData?.overall}
-            loading={skillProfileLoading}
-            error={skillProfileError}
-            defaultExpanded
-            artifactType="progression_graph"
-          />
-          <ExerciseProgressionPathBuilder
+          <ProgressionChainEditor
+            ref={chainEditorRef}
             graphId={selectedGraphId}
-            disabled={busy}
-            onSaved={async () => {
-              await refreshEdges(selectedGraphId)
-            }}
+            chains={flowChains}
+            busy={busy}
+            anchorExerciseId={anchorExerciseId}
+            anchorTitle={anchorTitle}
+            onRefresh={async () => refreshEdges(selectedGraphId)}
+            onPickExercise={setPickContext}
+            loadVariantsForExercise={loadVariantsForExercise}
           />
-          <div className="card" style={{ marginBottom: '12px' }}>
-            <h3 style={{ marginTop: 0, fontSize: '1rem' }}>Sequenz / Reihe anlegen</h3>
-            <p style={{ fontSize: '12px', color: 'var(--text3)', marginTop: 0 }}>
-              Reihenfolge von links nach rechts: jede Zeile ein Schritt. Es werden automatisch alle Nachfolger-Kanten
-              zwischen benachbarten Schritten erzeugt (ein API-Vorgang).
-            </p>
-            {sequenceSteps.map((step, idx) => (
-              <div
-                key={idx}
-                style={{
-                  display: 'grid',
-                  gridTemplateColumns: 'repeat(auto-fit, minmax(200px, 1fr))',
-                  gap: '10px',
-                  alignItems: 'end',
-                  marginBottom: '12px',
-                  paddingBottom: '12px',
-                  borderBottom: idx < sequenceSteps.length - 1 ? '1px dashed var(--border)' : 'none',
-                }}
-              >
-                <div className="form-row" style={{ marginBottom: 0 }}>
-                  <label className="form-label">Schritt {idx + 1}</label>
-                  <div style={{ display: 'flex', flexWrap: 'wrap', gap: '8px', alignItems: 'center' }}>
-                    <span style={{ fontSize: '13px', flex: '1 1 140px' }}>
-                      {step.exerciseId ? (
-                        <>
-                          <strong>{step.exerciseTitle}</strong>
-                          <span style={{ color: 'var(--text3)' }}> (#{step.exerciseId})</span>
-                        </>
-                      ) : (
-                        <span style={{ color: 'var(--text3)' }}>Übung wählen</span>
-                      )}
-                    </span>
-                    <button
-                      type="button"
-                      className="btn btn-secondary"
-                      style={{ fontSize: '12px', padding: '4px 10px' }}
-                      onClick={() => setPickContext({ kind: 'sequence', index: idx })}
-                    >
-                      Übung…
-                    </button>
-                    {anchorExerciseId != null && (
-                      <button
-                        type="button"
-                        className="btn"
-                        style={{ fontSize: '12px', padding: '4px 10px' }}
-                        onClick={async () => {
-                          const variants = await loadVariantsForExercise(anchorExerciseId)
-                          patchSeqStep(idx, {
-                            exerciseId: anchorExerciseId,
-                            exerciseTitle: anchorTitle?.trim() || `Übung #${anchorExerciseId}`,
-                            variantId: null,
-                            variants,
-                          })
-                        }}
-                      >
-                        Diese Übung
-                      </button>
-                    )}
-                  </div>
-                </div>
-                <div className="form-row" style={{ marginBottom: 0 }}>
-                  <label className="form-label">Variante (optional)</label>
-                  <select
-                    className="form-input"
-                    disabled={!step.exerciseId}
-                    value={step.variantId ?? ''}
-                    onChange={(e) =>
-                      patchSeqStep(idx, {
-                        variantId: e.target.value === '' ? null : parseInt(e.target.value, 10),
-                      })
-                    }
-                  >
-                    <option value="">Gesamte Übung (ohne feste Variante)</option>
-                    {(step.variants || []).map((v) => (
-                      <option key={v.id} value={v.id}>
-                        {v.variant_name || `Variante #${v.id}`}
-                      </option>
-                    ))}
-                  </select>
-                </div>
-                <div style={{ display: 'flex', gap: '6px', flexWrap: 'wrap' }}>
-                  <button type="button" className="btn" style={{ fontSize: '12px', padding: '4px 8px' }} onClick={() => moveSeqStep(idx, -1)}>
-                    ↑
-                  </button>
-                  <button type="button" className="btn" style={{ fontSize: '12px', padding: '4px 8px' }} onClick={() => moveSeqStep(idx, 1)}>
-                    ↓
-                  </button>
-                  <button type="button" className="btn" style={{ fontSize: '12px', padding: '4px 8px' }} onClick={() => removeSeqStep(idx)}>
-                    Zeile entfernen
-                  </button>
-                </div>
-              </div>
-            ))}
-            <button type="button" className="btn btn-secondary" style={{ marginBottom: '12px' }} onClick={addSeqStep}>
-              + Schritt
-            </button>
-            <div className="form-row">
-              <label className="form-label">Entwicklungsziel für alle neuen Zwischen-Kanten (optional)</label>
-              <textarea
-                className="form-input"
-                rows={2}
-                value={sequenceBulkNotes}
-                onChange={(e) => setSequenceBulkNotes(e.target.value)}
-                placeholder="wird auf jedes neue Segment der Sequenz kopiert"
-              />
-            </div>
-            <button type="button" className="btn btn-primary" disabled={busy} onClick={submitSequence}>
-              Sequenz als Nachfolger-Kanten speichern
-            </button>
-          </div>
-
-          <div className="card" style={{ marginBottom: '12px' }}>
-            <h3 style={{ marginTop: 0, fontSize: '1rem' }}>Nachfolger als Reihen (Lesart)</h3>
-            {flowChains.length === 0 ? (
-              <p style={{ color: 'var(--text2)', margin: 0 }}>Keine Nachfolger-Kanten im aktuellen Filter.</p>
-            ) : (
-              flowChains.map((chain, ci) => (
-                <div
-                  key={ci}
-                  style={{
-                    marginBottom: '14px',
-                    padding: '12px',
-                    borderRadius: '10px',
-                    border: '1px solid var(--border)',
-                    background: 'var(--surface2)',
-                  }}
-                >
-                  <div
-                    style={{
-                      display: 'flex',
-                      flexWrap: 'wrap',
-                      alignItems: 'center',
-                      gap: '6px 10px',
-                      fontSize: '13px',
-                      lineHeight: 1.5,
-                    }}
-                  >
-                    {chain.nodes.map((n, ni) => (
-                      <React.Fragment key={`${n.exercise_id}-${n.variant_id}-${ni}`}>
-                        {ni > 0 && (
-                          <span style={{ color: 'var(--accent)', fontWeight: 700 }} aria-hidden>
-                            →
-                          </span>
-                        )}
-                        <span style={{ fontWeight: 600 }}>{formatNodeLine(n)}</span>
-                      </React.Fragment>
-                    ))}
-                  </div>
-                  <div style={{ marginTop: '10px', display: 'flex', gap: '8px', flexWrap: 'wrap' }}>
-                    <button type="button" className="btn btn-secondary" disabled={busy} onClick={() => deleteChain(chain.edges)}>
-                      Diese Reihe löschen ({chain.edges.length} Kante(n))
-                    </button>
-                  </div>
-                </div>
-              ))
-            )}
-          </div>
 
           <div className="card" style={{ marginBottom: '12px' }}>
             <h3 style={{ marginTop: 0, fontSize: '1rem' }}>Schwestern & Alternativen</h3>
@@ -919,6 +635,65 @@ export default function ExerciseProgressionGraphPanel({
             )}
           </div>
 
+          <details className="card" style={{ marginBottom: '12px' }}>
+            <summary style={{ cursor: 'pointer', fontWeight: 600 }}>Graph-Einstellungen (Name, Sichtbarkeit)</summary>
+            <div style={{ marginTop: '14px' }}>
+              <div className="form-row">
+                <label className="form-label">Name</label>
+                <input className="form-input" value={metaName} onChange={(e) => setMetaName(e.target.value)} />
+              </div>
+              <div className="form-row">
+                <label className="form-label">Beschreibung</label>
+                <textarea
+                  className="form-input"
+                  rows={2}
+                  value={metaDescription}
+                  onChange={(e) => setMetaDescription(e.target.value)}
+                />
+              </div>
+              <div className="form-row">
+                <label className="form-label">{EXERCISE_VISIBILITY_FIELD_LABEL}</label>
+                <select
+                  className="form-input"
+                  value={metaVisibility}
+                  onChange={(e) => setMetaVisibility(e.target.value)}
+                >
+                  {filteredGraphVisOptions.map((o) => (
+                    <option key={o.value} value={o.value}>
+                      {o.label}
+                    </option>
+                  ))}
+                </select>
+              </div>
+              <button type="button" className="btn btn-secondary" disabled={busy} onClick={handleSaveMeta}>
+                Metadaten speichern
+              </button>
+            </div>
+          </details>
+
+          <details className="card" style={{ marginBottom: '12px' }}>
+            <summary style={{ cursor: 'pointer', fontWeight: 600 }}>KI: Neuen Pfad planen (4 Schritte)</summary>
+            <div style={{ marginTop: '14px' }}>
+              <ExerciseProgressionPathBuilder
+                graphId={selectedGraphId}
+                disabled={busy}
+                onSaved={async () => {
+                  await refreshEdges(selectedGraphId)
+                }}
+              />
+            </div>
+          </details>
+
+          <SkillProfilePanel
+            title="Fähigkeiten entlang des Pfads"
+            hint="Alle Übungen als Knoten im Graph (Standardgewicht pro Übung; Intensität und Stufen aus der Übungsverknüpfung)."
+            profile={skillProfileData?.overall}
+            loading={skillProfileLoading}
+            error={skillProfileError}
+            defaultExpanded={false}
+            artifactType="progression_graph"
+          />
+
           <details className="card" style={{ marginBottom: '12px' }}>
             <summary style={{ cursor: 'pointer', fontWeight: 600 }}>Einzelkante (Nachfolger oder Schwester)</summary>
             <div style={{ marginTop: '14px' }}>
@@ -1010,26 +785,13 @@ export default function ExerciseProgressionGraphPanel({
               </button>
             </div>
           </details>
-        </>
-      )}
 
-      {selectedGraphId && anchorExerciseId != null && (
-        <label style={{ display: 'flex', alignItems: 'center', gap: '8px', marginBottom: '12px', fontSize: '13px' }}>
-          <input
-            type="checkbox"
-            checked={filterAnchorOnly}
-            onChange={(e) => setFilterAnchorOnly(e.target.checked)}
-          />
-          Nur Kanten, die diese Übung betreffen (Übersicht &amp; Tabelle)
-        </label>
-      )}
-
-      {selectedGraphId && uiTab === 'table' && (
-        <div className="card">
-          <h3 style={{ marginTop: 0, fontSize: '1rem' }}>
-            Alle Kanten ({filteredEdges.length}
-            {edges.length !== filteredEdges.length ? ` von ${edges.length}` : ''})
-          </h3>
+          <details className="card" style={{ marginBottom: '12px' }}>
+            <summary style={{ cursor: 'pointer', fontWeight: 600 }}>
+              Technische Kantenliste ({filteredEdges.length}
+              {edges.length !== filteredEdges.length ? ` von ${edges.length}` : ''})
+            </summary>
+            <div style={{ marginTop: '14px' }}>
           {filteredEdges.length === 0 ? (
             <p style={{ color: 'var(--text2)', margin: 0 }}>Keine Kanten.</p>
           ) : (
@@ -1111,7 +873,9 @@ export default function ExerciseProgressionGraphPanel({
               </table>
             </div>
           )}
-        </div>
+            </div>
+          </details>
+        </>
       )}
 
       <ExercisePickerModal

frontend/src/components/ExerciseProgressionPathBuilder.jsx

@@ -443,6 +443,7 @@ export default function ExerciseProgressionPathBuilder({
   const [gapPrepError, setGapPrepError] = useState('')
   const [loadedPlanningHint, setLoadedPlanningHint] = useState(false)
   const [wizardStep, setWizardStep] = useState(1)
+  const [pathInsertNotice, setPathInsertNotice] = useState('')
 
   const maxReachableStep = useMemo(
     () => computeMaxReachableStep(editableMajorSteps, pathSteps),
@@ -498,6 +499,7 @@ export default function ExerciseProgressionPathBuilder({
     setStartTargetAnalyzed(false)
     setError('')
     setWizardStep(1)
+    setPathInsertNotice('')
 
     api
       .getExerciseProgressionGraph(Number(graphId))
@@ -883,6 +885,11 @@ export default function ExerciseProgressionPathBuilder({
       insertExerciseFromOffer(created, activeOffer)
       setQuickCreateDraft(null)
       setActiveOffer(null)
+      const title = (created.title || quickTitle || 'Übung').trim()
+      setPathInsertNotice(
+        `„${title}" wurde in den KI-Pfad eingefügt. Speichern Sie jetzt mit «Pfad in Graph speichern» — die Reihe erscheint dann oben unter «Reihen im Graph».`,
+      )
+      setWizardStep(4)
     } catch (e) {
       console.error(e)
       const msg = e?.message || String(e)
@@ -1137,6 +1144,7 @@ export default function ExerciseProgressionPathBuilder({
       setEditableMajorSteps([])
       setRoadmapDirty(false)
       setWizardStep(1)
+      setPathInsertNotice('')
       if (typeof onSaved === 'function') await onSaved()
       const msg =
         skippedAi > 0
@@ -1902,6 +1910,23 @@ export default function ExerciseProgressionPathBuilder({
             </p>
           ) : (
             <>
+          <div
+            style={{
+              marginBottom: '14px',
+              padding: '10px 12px',
+              borderRadius: '8px',
+              border: '1px solid color-mix(in srgb, var(--accent) 45%, var(--border))',
+              background: 'color-mix(in srgb, var(--accent) 10%, var(--surface))',
+              fontSize: '12px',
+              lineHeight: 1.5,
+              color: 'var(--accent-dark)',
+            }}
+          >
+            <strong>Wichtig:</strong> Der KI-Pfad ist noch nicht im Graph gespeichert. KI-Übungen werden erst nach
+            «Pfad in Graph speichern» als neue Reihe oben sichtbar.
+            {pathInsertNotice ? <p style={{ margin: '8px 0 0' }}>{pathInsertNotice}</p> : null}
+          </div>
+
           {gapFillOffers.length > 0 ? (
         <div
           style={{
@@ -1994,20 +2019,33 @@ export default function ExerciseProgressionPathBuilder({
             </p>
           )}
 
-          <details style={{ marginBottom: '12px', fontSize: '12px' }}>
-            <summary style={{ cursor: 'pointer', fontWeight: 600, color: 'var(--accent-dark)' }}>
-              Pfad-Übersicht ({pathSteps.length} Schritte)
-            </summary>
-            <ol style={{ margin: '10px 0 0', paddingLeft: '20px', lineHeight: 1.5 }}>
+          <div
+            style={{
+              marginBottom: '12px',
+              padding: '10px 12px',
+              borderRadius: '8px',
+              border: '1px solid var(--border)',
+              background: 'var(--surface2)',
+              fontSize: '12px',
+            }}
+          >
+            <strong style={{ display: 'block', marginBottom: '8px' }}>
+              Pfad vor dem Speichern ({pathSteps.length} Schritte)
+            </strong>
+            <ol style={{ margin: 0, paddingLeft: '20px', lineHeight: 1.55 }}>
               {pathSteps.map((step, idx) => (
                 <li key={`summary-${idx}`} style={{ marginBottom: '4px' }}>
                   <strong>{step.exerciseTitle}</strong>
-                  {step.roadmapPhase ? ` (${step.roadmapPhase})` : ''}
-                  {step.isAiProposal ? ' — KI-Vorschlag, noch anlegen' : ''}
+                  {step.exerciseId ? (
+                    <span style={{ color: 'var(--text3)' }}> (#{step.exerciseId})</span>
+                  ) : (
+                    <span style={{ color: 'var(--danger)' }}> — noch nicht angelegt</span>
+                  )}
+                  {step.roadmapPhase ? ` · ${step.roadmapPhase}` : ''}
                 </li>
               ))}
             </ol>
-          </details>
+          </div>
 
           <div className="form-row">
             <label className="form-label">Notiz für Kanten (Fallback, optional)</label>
@@ -2047,6 +2085,7 @@ export default function ExerciseProgressionPathBuilder({
                 setPathQa(null)
                 setGapFillOffers([])
                 setPathSkillExpectations(null)
+                setPathInsertNotice('')
                 setWizardStep(editableMajorSteps.length >= 2 ? 2 : 1)
               }}
             >

frontend/src/components/ProgressionChainEditor.jsx

@@ -0,0 +1,508 @@
+/**
+ * Bearbeitbare Darstellung linearer Progressions-Reihen im Graphen.
+ */
+import React, { forwardRef, useCallback, useEffect, useImperativeHandle, useMemo, useState } from 'react'
+import { Link } from 'react-router-dom'
+import api from '../utils/api'
+
+function emptyNode() {
+  return {
+    exerciseId: null,
+    exerciseTitle: '',
+    variantId: null,
+    variantName: null,
+    variants: [],
+  }
+}
+
+function chainToDraft(chain) {
+  return {
+    key: `chain-${chain.edges[0]?.id ?? 'x'}`,
+    edgeIds: chain.edges.map((e) => e.id),
+    segmentNotes: chain.edges.map((e) => e.notes || ''),
+    nodes: chain.nodes.map((n) => ({
+      exerciseId: n.exercise_id,
+      exerciseTitle: n.title || `Übung #${n.exercise_id}`,
+      variantId: n.variant_id ?? null,
+      variantName: n.variant_name ?? null,
+      variants: [],
+    })),
+    dirty: false,
+    isNew: false,
+  }
+}
+
+function newChainDraft() {
+  const key = `new-${Date.now()}`
+  return {
+    key,
+    edgeIds: [],
+    segmentNotes: [],
+    nodes: [emptyNode(), emptyNode()],
+    dirty: true,
+    isNew: true,
+  }
+}
+
+function formatNodeLabel(node) {
+  if (!node.exerciseId) return '— Übung wählen —'
+  return (
+    <>
+      <Link to={`/exercises/${node.exerciseId}`}>{node.exerciseTitle}</Link>
+      {node.variantName ? (
+        <span style={{ color: 'var(--text3)', fontWeight: 400 }}>{` · ${node.variantName}`}</span>
+      ) : null}
+    </>
+  )
+}
+
+const ProgressionChainEditor = forwardRef(function ProgressionChainEditor(
+  {
+    graphId,
+    chains = [],
+    busy = false,
+    anchorExerciseId = null,
+    anchorTitle = null,
+    onRefresh,
+    onPickExercise,
+    loadVariantsForExercise,
+  },
+  ref,
+) {
+  const [drafts, setDrafts] = useState([])
+  const [savingKey, setSavingKey] = useState(null)
+
+  const chainSignature = useMemo(
+    () =>
+      chains
+        .map((c) => c.edges.map((e) => e.id).join(','))
+        .join('|'),
+    [chains],
+  )
+
+  useEffect(() => {
+    setDrafts(chains.map(chainToDraft))
+  }, [chainSignature, chains])
+
+  const patchDraft = useCallback((key, patchFn) => {
+    setDrafts((prev) =>
+      prev.map((d) => {
+        if (d.key !== key) return d
+        const next = patchFn(d)
+        return { ...next, dirty: true }
+      }),
+    )
+  }, [])
+
+  const moveNode = (key, idx, dir) => {
+    patchDraft(key, (d) => {
+      const j = idx + dir
+      if (j < 0 || j >= d.nodes.length) return d
+      const nodes = [...d.nodes]
+      const t = nodes[idx]
+      nodes[idx] = nodes[j]
+      nodes[j] = t
+      return { ...d, nodes }
+    })
+  }
+
+  const removeNode = (key, idx) => {
+    patchDraft(key, (d) => {
+      if (d.nodes.length <= 2) return d
+      const nodes = d.nodes.filter((_, i) => i !== idx)
+      const segmentNotes = d.segmentNotes.slice(0, Math.max(0, nodes.length - 1))
+      return { ...d, nodes, segmentNotes }
+    })
+  }
+
+  const setVariant = (key, idx, variantId) => {
+    patchDraft(key, (d) => ({
+      ...d,
+      nodes: d.nodes.map((n, i) => {
+        if (i !== idx) return n
+        const v = (n.variants || []).find((x) => Number(x.id) === Number(variantId))
+        return {
+          ...n,
+          variantId: variantId === '' || variantId == null ? null : Number(variantId),
+          variantName: v?.variant_name || null,
+        }
+      }),
+    }))
+  }
+
+  const applyExerciseToNode = useCallback(async (key, idx, ex) => {
+    const title = ex.title || `Übung #${ex.id}`
+    const variants =
+      Array.isArray(ex.variants) && ex.variants.length
+        ? ex.variants
+        : await loadVariantsForExercise(ex.id)
+    const variantId = ex.exercise_variant_id ?? ex.suggested_variant_id ?? null
+    patchDraft(key, (d) => ({
+      ...d,
+      nodes: d.nodes.map((n, i) =>
+        i === idx
+          ? {
+              exerciseId: ex.id,
+              exerciseTitle: title,
+              variantId: variantId != null ? Number(variantId) : null,
+              variantName:
+                variantId != null
+                  ? variants.find((v) => Number(v.id) === Number(variantId))?.variant_name || null
+                  : null,
+              variants,
+            }
+          : n,
+      ),
+    }))
+  }, [patchDraft, loadVariantsForExercise])
+
+  const insertNodeAfter = (key, idx) => {
+    patchDraft(key, (d) => {
+      const nodes = [...d.nodes]
+      nodes.splice(idx + 1, 0, emptyNode())
+      return { ...d, nodes }
+    })
+    onPickExercise({ kind: 'chain', draftKey: key, nodeIndex: idx + 1 })
+  }
+
+  const addNewChain = () => {
+    setDrafts((prev) => [...prev, newChainDraft()])
+  }
+
+  const discardDraft = (key) => {
+    setDrafts((prev) => {
+      const draft = prev.find((d) => d.key === key)
+      if (!draft) return prev
+      if (draft.isNew) return prev.filter((d) => d.key !== key)
+      const original = chains.find((c) => `chain-${c.edges[0]?.id}` === key)
+      if (!original) return prev.filter((d) => d.key !== key)
+      return prev.map((d) => (d.key === key ? chainToDraft(original) : d))
+    })
+  }
+
+  const deleteChain = async (draft) => {
+    if (!graphId) return
+    if (draft.isNew) {
+      setDrafts((prev) => prev.filter((d) => d.key !== draft.key))
+      return
+    }
+    if (!draft.edgeIds.length) return
+    if (!window.confirm(`Reihe mit ${draft.nodes.length} Schritten löschen?`)) return
+    setSavingKey(draft.key)
+    try {
+      await api.deleteExerciseProgressionEdgesBatch(graphId, draft.edgeIds)
+      await onRefresh()
+    } catch (e) {
+      alert(e.message || String(e))
+    } finally {
+      setSavingKey(null)
+    }
+  }
+
+  const saveDraft = async (draft) => {
+    if (!graphId) return
+    const steps = draft.nodes.filter((n) => n.exerciseId != null)
+    if (steps.length < 2) {
+      alert('Mindestens zwei Schritte mit gewählter Übung.')
+      return
+    }
+    const n = steps.length - 1
+    let segment_notes = draft.segmentNotes.slice(0, n)
+    while (segment_notes.length < n) segment_notes.push(null)
+    segment_notes = segment_notes.slice(0, n)
+
+    setSavingKey(draft.key)
+    try {
+      if (!draft.isNew && draft.edgeIds.length) {
+        await api.deleteExerciseProgressionEdgesBatch(graphId, draft.edgeIds)
+      }
+      await api.createExerciseProgressionSequence(graphId, {
+        steps: steps.map((s) => ({
+          exercise_id: s.exerciseId,
+          variant_id: s.variantId || null,
+        })),
+        segment_notes,
+      })
+      await onRefresh()
+    } catch (e) {
+      alert(e.message || String(e))
+    } finally {
+      setSavingKey(null)
+    }
+  }
+
+  const ensureVariantsLoaded = async (key, idx) => {
+    const draft = drafts.find((d) => d.key === key)
+    const node = draft?.nodes[idx]
+    if (!node?.exerciseId || (node.variants || []).length) return
+    const variants = await loadVariantsForExercise(node.exerciseId)
+    setDrafts((prev) =>
+      prev.map((d) => {
+        if (d.key !== key) return d
+        return {
+          ...d,
+          nodes: d.nodes.map((n, i) => (i === idx ? { ...n, variants } : n)),
+        }
+      }),
+    )
+  }
+
+  useImperativeHandle(
+    ref,
+    () => ({
+      applyExercise: applyExerciseToNode,
+    }),
+    [applyExerciseToNode],
+  )
+
+  if (!graphId) return null
+
+  return (
+    <div className="card" style={{ marginBottom: '12px' }}>
+      <div
+        style={{
+          display: 'flex',
+          flexWrap: 'wrap',
+          gap: '10px',
+          alignItems: 'center',
+          justifyContent: 'space-between',
+          marginBottom: '12px',
+        }}
+      >
+        <div>
+          <h3 style={{ margin: 0, fontSize: '1rem' }}>Reihen im Graph</h3>
+          <p style={{ fontSize: '12px', color: 'var(--text3)', margin: '4px 0 0', lineHeight: 1.45 }}>
+            Jede Reihe ist ein linearer Pfad: Schritt 1 → 2 → … Reihenfolge ändern, Übungen tauschen oder
+            dazwischen einfügen, dann speichern.
+          </p>
+        </div>
+        <button type="button" className="btn btn-primary" disabled={busy} onClick={addNewChain}>
+          + Neue Reihe
+        </button>
+      </div>
+
+      {drafts.length === 0 ? (
+        <p style={{ color: 'var(--text2)', margin: 0, fontSize: '13px' }}>
+          Noch keine Reihen in diesem Graph. Legen Sie eine neue Reihe an oder nutzen Sie den KI-Planer unten.
+        </p>
+      ) : (
+        drafts.map((draft, chainIdx) => (
+          <div
+            key={draft.key}
+            style={{
+              marginBottom: '16px',
+              padding: '14px',
+              borderRadius: '10px',
+              border: `1px solid ${
+                draft.dirty
+                  ? 'color-mix(in srgb, var(--accent) 50%, var(--border))'
+                  : 'var(--border)'
+              }`,
+              background: 'var(--surface2)',
+            }}
+          >
+            <div
+              style={{
+                display: 'flex',
+                flexWrap: 'wrap',
+                gap: '8px',
+                alignItems: 'center',
+                marginBottom: '12px',
+              }}
+            >
+              <strong style={{ fontSize: '13px' }}>Reihe {chainIdx + 1}</strong>
+              {draft.dirty ? (
+                <span className="exercise-tag" style={{ borderColor: 'var(--accent)' }}>
+                  Ungespeichert
+                </span>
+              ) : null}
+              {draft.isNew ? (
+                <span className="exercise-tag">Neu</span>
+              ) : (
+                <span className="exercise-tag">{draft.nodes.length} Schritte</span>
+              )}
+            </div>
+
+            <div style={{ display: 'flex', flexDirection: 'column', gap: '0' }}>
+              {draft.nodes.map((node, idx) => (
+                <React.Fragment key={`${draft.key}-node-${idx}`}>
+                  {idx > 0 ? (
+                    <div
+                      style={{
+                        display: 'flex',
+                        alignItems: 'center',
+                        gap: '8px',
+                        padding: '4px 0 4px 12px',
+                        color: 'var(--accent)',
+                        fontSize: '12px',
+                        fontWeight: 700,
+                      }}
+                      aria-hidden
+                    >
+                      ↓ Nachfolger
+                    </div>
+                  ) : null}
+                  <div
+                    style={{
+                      display: 'grid',
+                      gridTemplateColumns: 'repeat(auto-fit, minmax(180px, 1fr))',
+                      gap: '10px',
+                      alignItems: 'end',
+                      padding: '10px 12px',
+                      borderRadius: '8px',
+                      border: '1px solid var(--border)',
+                      background: 'var(--surface)',
+                    }}
+                  >
+                    <div className="form-row" style={{ marginBottom: 0 }}>
+                      <label className="form-label">Schritt {idx + 1}</label>
+                      <div
+                        style={{
+                          display: 'flex',
+                          flexWrap: 'wrap',
+                          gap: '8px',
+                          alignItems: 'center',
+                        }}
+                      >
+                        <span style={{ fontSize: '13px', flex: '1 1 140px' }}>
+                          {formatNodeLabel(node)}
+                        </span>
+                        <button
+                          type="button"
+                          className="btn btn-secondary"
+                          style={{ fontSize: '12px', padding: '4px 10px' }}
+                          disabled={busy || savingKey === draft.key}
+                          onClick={() =>
+                            onPickExercise({ kind: 'chain', draftKey: draft.key, nodeIndex: idx })
+                          }
+                        >
+                          {node.exerciseId ? 'Tauschen…' : 'Übung…'}
+                        </button>
+                        {anchorExerciseId != null ? (
+                          <button
+                            type="button"
+                            className="btn"
+                            style={{ fontSize: '12px', padding: '4px 10px' }}
+                            disabled={busy || savingKey === draft.key}
+                            onClick={async () => {
+                              const variants = await loadVariantsForExercise(anchorExerciseId)
+                              await applyExerciseToNode(draft.key, idx, {
+                                id: anchorExerciseId,
+                                title: anchorTitle?.trim() || `Übung #${anchorExerciseId}`,
+                                variants,
+                              })
+                            }}
+                          >
+                            Kontext-Übung
+                          </button>
+                        ) : null}
+                      </div>
+                    </div>
+                    <div className="form-row" style={{ marginBottom: 0 }}>
+                      <label className="form-label">Variante</label>
+                      <select
+                        className="form-input"
+                        disabled={!node.exerciseId || busy || savingKey === draft.key}
+                        value={node.variantId ?? ''}
+                        onFocus={() => ensureVariantsLoaded(draft.key, idx)}
+                        onChange={(e) =>
+                          setVariant(
+                            draft.key,
+                            idx,
+                            e.target.value === '' ? null : parseInt(e.target.value, 10),
+                          )
+                        }
+                      >
+                        <option value="">Gesamte Übung</option>
+                        {(node.variants || []).map((v) => (
+                          <option key={v.id} value={v.id}>
+                            {v.variant_name || `Variante #${v.id}`}
+                          </option>
+                        ))}
+                      </select>
+                    </div>
+                    <div style={{ display: 'flex', gap: '6px', flexWrap: 'wrap' }}>
+                      <button
+                        type="button"
+                        className="btn"
+                        style={{ fontSize: '12px', padding: '4px 8px' }}
+                        disabled={busy || savingKey === draft.key || idx === 0}
+                        onClick={() => moveNode(draft.key, idx, -1)}
+                      >
+                        ↑
+                      </button>
+                      <button
+                        type="button"
+                        className="btn"
+                        style={{ fontSize: '12px', padding: '4px 8px' }}
+                        disabled={busy || savingKey === draft.key || idx >= draft.nodes.length - 1}
+                        onClick={() => moveNode(draft.key, idx, 1)}
+                      >
+                        ↓
+                      </button>
+                      <button
+                        type="button"
+                        className="btn"
+                        style={{ fontSize: '12px', padding: '4px 8px' }}
+                        disabled={busy || savingKey === draft.key}
+                        onClick={() => insertNodeAfter(draft.key, idx)}
+                      >
+                        + Einfügen
+                      </button>
+                      <button
+                        type="button"
+                        className="btn"
+                        style={{ fontSize: '12px', padding: '4px 8px' }}
+                        disabled={busy || savingKey === draft.key || draft.nodes.length <= 2}
+                        onClick={() => removeNode(draft.key, idx)}
+                      >
+                        Entfernen
+                      </button>
+                    </div>
+                  </div>
+                </React.Fragment>
+              ))}
+            </div>
+
+            <div style={{ display: 'flex', flexWrap: 'wrap', gap: '8px', marginTop: '12px' }}>
+              <button
+                type="button"
+                className="btn btn-primary"
+                disabled={busy || savingKey === draft.key || !draft.dirty}
+                onClick={() => saveDraft(draft)}
+              >
+                {savingKey === draft.key ? 'Speichern …' : 'Reihe speichern'}
+              </button>
+              {draft.dirty ? (
+                <button
+                  type="button"
+                  className="btn btn-secondary"
+                  disabled={busy || savingKey === draft.key}
+                  onClick={() => discardDraft(draft.key)}
+                >
+                  Verwerfen
+                </button>
+              ) : null}
+              <button
+                type="button"
+                className="btn"
+                style={{
+                  fontSize: '12px',
+                  background: 'var(--danger)',
+                  color: '#fff',
+                  border: 'none',
+                }}
+                disabled={busy || savingKey === draft.key}
+                onClick={() => deleteChain(draft)}
+              >
+                Reihe löschen
+              </button>
+            </div>
+          </div>
+        ))
+      )}
+    </div>
+  )
+})
+
+export default ProgressionChainEditor