CC5 R5: fix bulk-uplatnice + xlsx + notify-scan extended (incl. expired)

- /api/crm/clanovi/export.xlsx: fix col_letters list construction (str+list bug)
- /api/crm/lijecnicki/notify-scan: dodan include_expired=True bucket, jasniji
  subject za already-expired vs uskoro istek

CC2 commit 0046b8d je već unio crm_extras_router.py na master; ovaj commit
samo sređuje bugove i extends scan logiku.

routers/crm_extras_router.py

@@ -275,7 +275,8 @@ def export_clanovi_xlsx(
             ws.cell(row=ridx, column=cidx, value=v)
 
     # Auto column widths
-    for col_letter, h in zip("ABCDEFGHIJKLMNOPQRSTUVWXYZ" + "AA AB AC AD".split(), headers):
+    col_letters = list("ABCDEFGHIJKLMNOPQRSTUVWXYZ") + ["AA", "AB", "AC", "AD", "AE", "AF"]
+    for col_letter, h in zip(col_letters, headers):
         ws.column_dimensions[col_letter].width = max(10, min(28, len(h) + 4))
 
     ws.freeze_panes = "A2"
@@ -406,22 +407,35 @@ def crm_stats(klub_id: Optional[int] = Query(None)):
 class NotifScanIn(BaseModel):
     klub_id: Optional[int] = None
     thresholds: Optional[list[int]] = None  # default = LIJEC_THRESHOLDS
+    include_expired: bool = True  # uključi i one koji su već istekli
 
 
 @router.post("/lijecnicki/notify-scan")
 def lijecnicki_notify_scan(body: NotifScanIn):
     """
     Skenira nadolazeće isteke i kreira notifikacije (InApp + Email mock)
-    za pragove 30/15/7 dana. Ne duplicira: gleda meta.lijecnicki_id+threshold
+    za pragove 30/15/7 dana. Ako include_expired=True, isto kreira jednu
-    u zadnjih 7 dana.
+    notifikaciju (threshold=0) za već istekle.
+    Ne duplicira: gleda meta.lijecnicki_id+threshold u zadnjih 7 dana.
     """
     thresholds = sorted(set(body.thresholds or LIJEC_THRESHOLDS), reverse=True)
     klub_filter = "AND l.klub_id = %s" if body.klub_id else ""
     klub_params = [body.klub_id] if body.klub_id else []
 
+    # threshold=0 → već istekli (poseban "expired" bucket)
+    scan_buckets = [(thr, "uskoro") for thr in thresholds]
+    if body.include_expired:
+        scan_buckets.append((0, "expired"))
+
     created = []
     with _conn() as conn, conn.cursor() as cur:
-        for thr in thresholds:
+        for thr, kind in scan_buckets:
+            if kind == "expired":
+                where_window = "(l.vrijedi_do - CURRENT_DATE) < 0"
+                where_params = []
+            else:
+                where_window = "(l.vrijedi_do - CURRENT_DATE) BETWEEN 0 AND %s"
+                where_params = [thr]
             cur.execute(f"""
               SELECT l.id, l.vrijedi_do, l.clan_id,
                      (l.vrijedi_do - CURRENT_DATE)::int AS dana,
@@ -432,27 +446,9 @@ def lijecnicki_notify_scan(body: NotifScanIn):
                 LEFT JOIN pgz_sport.clanovi cl ON cl.id = l.clan_id
                 LEFT JOIN pgz_sport.klubovi  k ON k.id  = l.klub_id
                WHERE l.vrijedi_do IS NOT NULL
-                 AND (l.vrijedi_do - CURRENT_DATE) BETWEEN 0 AND %s
+                 AND {where_window}
-                 AND (l.vrijedi_do - CURRENT_DATE) > %s
                  {klub_filter}
-            """, [thr, thr - 1] + klub_params if False else
+            """, where_params + klub_params)
-                  ([thr - (thresholds[thresholds.index(thr)+1] if thresholds.index(thr)+1 < len(thresholds) else 0),
-                    -1] + klub_params))
-            # Pojednostavljen scan: samo "≤ thr & > prev_thr" dovodi do duplika;
-            # umjesto toga samo gledamo "u prozoru ≤ thr".
-            cur.execute(f"""
-              SELECT l.id, l.vrijedi_do, l.clan_id,
-                     (l.vrijedi_do - CURRENT_DATE)::int AS dana,
-                     cl.ime || ' ' || cl.prezime AS clan,
-                     cl.email AS clan_email,
-                     k.naziv AS klub
-                FROM pgz_sport.lijecnicki_pregledi l
-                LEFT JOIN pgz_sport.clanovi cl ON cl.id = l.clan_id
-                LEFT JOIN pgz_sport.klubovi  k ON k.id  = l.klub_id
-               WHERE l.vrijedi_do IS NOT NULL
-                 AND (l.vrijedi_do - CURRENT_DATE) BETWEEN 0 AND %s
-                 {klub_filter}
-            """, [thr] + klub_params)
             kandidati = [_row(r) for r in cur.fetchall()]
 
             for r in kandidati:
@@ -467,11 +463,16 @@ def lijecnicki_notify_scan(body: NotifScanIn):
                 if cur.fetchone():
                     continue
 
+                if r['dana'] is not None and r['dana'] < 0:
+                    subject = f"⚠ Liječnički pregled ISTEKAO ({-r['dana']} dana): {r['clan']}"
+                    msg_dana = f"istekao prije {-r['dana']} dana"
+                else:
                     subject = f"⚕ Liječnički pregled ističe za {r['dana']} dana: {r['clan']}"
+                    msg_dana = f"{r['dana']} dana ostalo"
                 body_txt = (
                     f"Liječnički pregled za sportaša {r['clan']} "
-                    f"({r.get('klub') or '(bez kluba)'}) ističe {r['vrijedi_do']} "
+                    f"({r.get('klub') or '(bez kluba)'}) — vrijedi do {r['vrijedi_do']} "
-                    f"— {r['dana']} dana ostalo.\n\n"
+                    f"— {msg_dana}.\n\n"
                     f"Molimo zakažite novi termin u ZZJZ PGŽ "
                     f"(ili koristite /sport/api/crm/lijecnicki/{r['id']}/zakazi).\n\n"
                     f"PGŽ Sport ERP/CRM"