Enhance Progression Path Suggestion Logic and UI Feedback

- Updated `suggest_progression_path` to include AI-generated gap fill offers when exercises are missing, improving the relevance of suggested paths.
- Introduced a match summary to provide insights on library matches and gap fill offers, enhancing user feedback in the `ProgressionGraphEditor`.
- Refined the `pick_best_path_hit` function to ensure proper handling of roadmap stage matches based on primary topics.
- Added tests to validate the new gap fill offer logic and match summary functionality, ensuring robustness in path suggestion features.

backend/planning_exercise_path_builder.py

@@ -1414,7 +1414,10 @@ def suggest_progression_path(
             anchor_id = eid
             anchor_variant_id = step.get("variant_id")
 
-    if len(steps) < 2:
+    stage_spec_count = len(roadmap_ctx.stage_specs or []) if roadmap_ctx else 0
+    if roadmap_first and stage_spec_count >= 2:
+        pass
+    elif len(steps) < 2:
         raise HTTPException(
             status_code=422,
             detail="Zu wenig passende Übungen für einen Pfad (mindestens 2 Schritte). Ziel präzisieren oder max_steps senken.",
@@ -1623,6 +1626,60 @@ def suggest_progression_path(
             roadmap_ctx=roadmap_ctx,
             max_steps=max_steps,
         )
+        if body.include_ai_gap_fill:
+            seen_offer_ids = {o.get("offer_id") for o in gap_fill_offers}
+            for step in steps:
+                if step.get("exercise_id") is not None:
+                    continue
+                try:
+                    major_idx = int(step["roadmap_major_step_index"])
+                except (TypeError, ValueError, KeyError):
+                    continue
+                stage_spec = next(
+                    (
+                        s
+                        for s in (roadmap_ctx.stage_specs or [])
+                        if int(s.major_step_index) == major_idx
+                    ),
+                    None,
+                )
+                if stage_spec is None:
+                    continue
+                spec = {
+                    "source": "roadmap_unfilled",
+                    "insert_after_index": max(major_idx - 1, -1),
+                    "roadmap_major_step_index": major_idx,
+                    "phase": (step.get("roadmap_phase") or "vertiefung").strip().lower(),
+                    "title_hint": (stage_spec.learning_goal or step.get("title") or f"Slot {major_idx + 1}")[:120],
+                    "sketch": (stage_spec.learning_goal or "").strip(),
+                    "rationale": f"Slot {major_idx + 1} — keine passende Bibliotheks-Übung; KI-Entwurf für diese Stufe.",
+                }
+                offer = build_gap_fill_offer(
+                    spec=spec,
+                    steps=steps,
+                    goal_query=goal_query,
+                    brief=semantic_brief,
+                    proposal=None,
+                    roadmap_snapshot=_roadmap_gap_snapshot_for_spec(
+                        cur,
+                        roadmap_ctx,
+                        spec,
+                        goal_query=goal_query,
+                        semantic_brief=semantic_brief,
+                    ),
+                )
+                if offer.get("offer_id") not in seen_offer_ids:
+                    gap_fill_offers.append(offer)
+                    seen_offer_ids.add(offer.get("offer_id"))
+
+    filled_library_steps = sum(1 for s in steps if s.get("exercise_id") is not None)
+    match_summary = {
+        "roadmap_first": roadmap_first,
+        "library_matches": filled_library_steps,
+        "slot_count": len(steps),
+        "gap_fill_offer_count": len(gap_fill_offers),
+        "roadmap_unfilled_count": len(roadmap_unfilled),
+    }
 
     target_profile_summary = path_target_profile.to_summary_dict(cur)
     retrieval_parts = ["profile_v1", "full_library", "path_builder", "semantics"]
@@ -1667,6 +1724,7 @@ def suggest_progression_path(
         "roadmap_edited": roadmap_edited,
         "roadmap_unfilled_count": len(roadmap_unfilled),
         "path_skill_expectations": path_skill_expectations,
+        "match_summary": match_summary,
         "retrieval_phase": "+".join(retrieval_parts),
     }
 

backend/planning_exercise_semantics.py

@@ -1286,7 +1286,10 @@ def pick_best_path_hit(
         return chosen
 
     if roadmap_stage_match:
+        if (path_primary_topic or "").strip():
             return None
+        chosen = _scan(strict=False)
+        return chosen
 
     chosen = _scan(strict=False)
     if chosen:

backend/tests/test_planning_roadmap_stage_match.py

@@ -263,6 +263,32 @@ def test_resolve_path_primary_topic_from_stage_learning_goal():
     assert primary and "mawashi" in primary
 
 
+def test_pick_roadmap_relaxed_for_non_technique_stage():
+    stage_goal = "Progression Hüftflexibilität und Adduktoren dehnen"
+    stage_brief = build_stage_match_brief(learning_goal=stage_goal)
+    hits = [
+        {
+            "id": 11,
+            "title": "Adduktoren Dehnung am Boden",
+            "summary": "Flexibilität Hüfte",
+            "goal": "Mobilität",
+            "score": 0.68,
+            "semantic_score": 0.22,
+            "stage_semantic_score": 0.22,
+        },
+    ]
+    chosen = pick_best_path_hit(
+        hits,
+        set(),
+        stage_learning_goal=stage_goal,
+        roadmap_stage_match=True,
+        stage_match_brief=stage_brief,
+        path_primary_topic=None,
+    )
+    assert chosen is not None
+    assert int(chosen["id"]) == 11
+
+
 def test_pick_rejects_kumite_when_primary_only_in_stage_goal():
     brief = build_semantic_brief("Trainingsprogression")
     stage_goal = "Perfektionierung der statischen Mawashi Geri Technik"

frontend/src/components/ProgressionGraphEditor.jsx

@@ -71,6 +71,7 @@ export default function ProgressionGraphEditor({ graphId, embedded = false, onSa
   const [busy, setBusy] = useState(false)
   const [loadErr, setLoadErr] = useState('')
   const [actionErr, setActionErr] = useState('')
+  const [matchNotice, setMatchNotice] = useState('')
   const [pickContext, setPickContext] = useState(null)
   const [pathQa, setPathQa] = useState(null)
   const [gapFillOffers, setGapFillOffers] = useState([])
@@ -396,6 +397,7 @@ export default function ProgressionGraphEditor({ graphId, embedded = false, onSa
     }
     setMatching(true)
     setActionErr('')
+    setMatchNotice('')
     try {
       const synced = syncProgressionRoadmapFromSlots(draft)
       const override = majorStepsToOverridePayload(synced.slots)
@@ -427,6 +429,21 @@ export default function ProgressionGraphEditor({ graphId, embedded = false, onSa
       setTargetSummary(res?.target_profile_summary || null)
       setPathQa(res?.path_qa || null)
       setGapFillOffers(remainingOffers)
+      const ms = res?.match_summary
+      if (ms) {
+        setMatchNotice(
+          `Match: ${ms.library_matches ?? 0}/${ms.slot_count ?? '?'} Slots aus Bibliothek, ${ms.gap_fill_offer_count ?? 0} KI-Angebote.`,
+        )
+      }
+      try {
+        await saveProgressionGraphDraft(api, graphId, {
+          ...matched,
+          lastFindings: res?.path_qa || null,
+        })
+        setDraft((prev) => (prev ? { ...prev, dirty: false } : prev))
+      } catch (saveErr) {
+        console.warn('Match-Artefakt konnte nicht gespeichert werden', saveErr)
+      }
     } catch (e) {
       setActionErr(e.message || 'Übungs-Match fehlgeschlagen')
     } finally {
@@ -868,6 +885,9 @@ export default function ProgressionGraphEditor({ graphId, embedded = false, onSa
                 {busy ? 'Speichern…' : 'Graph speichern'}
               </button>
             </div>
+            {matchNotice ? (
+              <p style={{ margin: '8px 0 0', fontSize: '11px', color: 'var(--accent-dark)' }}>{matchNotice}</p>
+            ) : null}
             {draft.dirty ? (
               <p style={{ margin: '8px 0 0', fontSize: '11px', color: 'var(--accent-dark)' }}>
                 Ungespeicherte Änderungen

frontend/src/utils/progressionGraphDraft.js

@@ -245,7 +245,7 @@ export function filterGapOffersForUnfilledSlots(draft, offers) {
     if (idx == null || idx < 0 || idx >= (draft?.slots?.length || 0)) return true
     const p = draft.slots[idx]?.primary
     if (p?.kind === 'library' && p.exerciseId != null) return false
-    if (p?.kind === 'proposal') return false
+    if (p?.kind === 'proposal' && p.aiSuggestion) return false
     return true
   })
 }
@@ -407,13 +407,13 @@ export function majorStepsToOverridePayload(rows) {
     major_steps: indexed.map((row) => ({
       index: row.index,
       phase: row.phase || 'vertiefung',
-      learning_goal: row.learning_goal.trim(),
+      learning_goal: (row.learning_goal || '').trim(),
       consolidates: row.consolidates || [],
       rationale: row.rationale || '',
     })),
     stage_specs: indexed.map((row, i) => ({
       major_step_index: i,
-      learning_goal: row.learning_goal.trim(),
+      learning_goal: (row.learning_goal || '').trim(),
       load_profile: Array.isArray(row.load_profile) ? row.load_profile : [],
       exercise_type: (row.exercise_type || '').trim(),
       success_criteria: Array.isArray(row.success_criteria) ? row.success_criteria : [],
@@ -521,8 +521,11 @@ function buildSlotsFromSources({ majorSteps, slotContents, primaryChain, sibling
       ? slotContents.find((s) => Number(s.major_step_index) === i)
       : null
 
+    const hasSavedSlotContents = Array.isArray(slotContents) && slotContents.length > 0
     let primary = saved?.primary
       ? slotExerciseFromApi(saved.primary)
+      : hasSavedSlotContents
+        ? emptySlotExercise()
         : chainNodeToLibrary(primaryChain?.nodes?.[i])
 
     if (primary.kind === 'empty' && saved?.primary) {
@@ -760,7 +763,10 @@ export function applyMatchStepsToSlots(draft, apiSteps) {
     touchedMajors.add(idx)
 
     const isProposal = Boolean(step.is_ai_proposal) || step.exercise_id == null
-    if (isProposal) {
+    const hasAiPayload = Boolean(step.ai_suggestion) || Boolean(step.proposal_key)
+    if (isProposal && !hasAiPayload) {
+      nextSlots[idx].primary = emptySlotExercise()
+    } else if (isProposal) {
       nextSlots[idx].primary = proposalSlotExercise({
         title: step.title || nextSlots[idx].learning_goal,
         proposalKey: step.proposal_key,
@@ -804,7 +810,7 @@ export function applyGapOffersFromResponse(draft, res, { replaceOffTopicSlots =
       offer?.replace_step_index != null
     if (!isOffTopicReplace) {
       if (primary?.kind === 'library' && primary.exerciseId != null) continue
-      if (primary?.kind === 'proposal') continue
+      if (primary?.kind === 'proposal' && primary.aiSuggestion) continue
     }
 
     next = applyGapOfferToSlot(next, idx, offer)