update

backend/routes.py

@@ -1,4 +1,5 @@
 import asyncio
+import json
 import shutil
 import uuid
 from datetime import datetime, timezone
@@ -45,6 +46,38 @@ async def get_topics():
     return db_topics + sorted(derived - set(db_topics))
 
 
+@router.get("/stats")
+async def get_stats():
+    """Tracker: Themen-Anzahl + pro Format erstellt/absolviert (alle Kapitel abgehakt)."""
+    guides = await list_guides()
+    themen = set(await db_list_topics()) | {g["topic"] for g in guides} | set(bausteine_topics())
+    if PROJECTS_DIR.is_dir():
+        themen |= {e.name for e in PROJECTS_DIR.iterdir() if e.is_dir()}
+
+    formate = {}
+    for fmt in ("MiniGuide", "Guide", "FullGuide"):
+        # Pro Thema zählt nur der neueste fertige Guide (Altläufe teilen die Content-Datei)
+        neueste: dict[str, dict] = {}
+        for g in guides:
+            if g["format"] == fmt and g["status"] == "done":
+                if g["topic"] not in neueste or g["created_at"] > neueste[g["topic"]]["created_at"]:
+                    neueste[g["topic"]] = g
+        absolviert = 0
+        for g in neueste.values():
+            path = guide_content_path(g["topic"], fmt)
+            if not path.exists():
+                continue
+            try:
+                chapters = json.loads(path.read_text(encoding="utf-8")).get("chapters", [])
+            except ValueError:
+                continue
+            titles = {c.get("title") for c in chapters}
+            if titles and titles <= set(await list_progress(g["id"])):
+                absolviert += 1
+        formate[fmt] = {"erstellt": len(neueste), "absolviert": absolviert}
+    return {"themen": len(themen), "formate": formate}
+
+
 @router.post("/topics")
 async def add_topic(req: TopicCreateRequest):
     await create_topic(req.name.strip())