Ajoute les rappels de pointage via ntfy et détection de présence Tasker

Notifie l'utilisateur toutes les 5 min s'il est présent dans les locaux
sans avoir pointé le matin, ou parti sans avoir dépointé la sortie.

app/models.py

@@ -1,5 +1,6 @@
 """Flat-file storage: JSON files per week for pointages, one file for congés."""
 import json
+import secrets
 import shutil
 from pathlib import Path
 
@@ -125,6 +126,60 @@ def save_conges(conges: list[dict], user_id: str = ""):
     )
 
 
+# ── Notifications (ntfy topic + presence tracking) ────────────────────────────
+
+def _notif_file(user_id: str) -> Path:
+    return _user_root(user_id) / "notif.json"
+
+
+def load_notif_config(user_id: str) -> dict:
+    """Return {"ntfy_topic": str|None, "token": str}, generating a token on first use."""
+    f = _notif_file(user_id)
+    if f.exists():
+        cfg = json.loads(f.read_text())
+        if cfg.get("token"):
+            return cfg
+    else:
+        cfg = {"ntfy_topic": None}
+    cfg["token"] = secrets.token_hex(16)
+    _ensure_user_dirs(user_id)
+    f.write_text(json.dumps(cfg, indent=2, ensure_ascii=False))
+    return cfg
+
+
+def save_notif_config(user_id: str, ntfy_topic: str):
+    cfg = load_notif_config(user_id)
+    cfg["ntfy_topic"] = ntfy_topic.strip() or None
+    _ensure_user_dirs(user_id)
+    _notif_file(user_id).write_text(json.dumps(cfg, indent=2, ensure_ascii=False))
+
+
+def find_user_by_token(token: str) -> str | None:
+    for user_id in list_users():
+        f = _notif_file(user_id)
+        if f.exists() and json.loads(f.read_text()).get("token") == token:
+            return user_id
+    return None
+
+
+def _presence_file(user_id: str) -> Path:
+    return _user_root(user_id) / "presence.json"
+
+
+def load_presence(user_id: str) -> dict:
+    f = _presence_file(user_id)
+    if f.exists():
+        return json.loads(f.read_text())
+    return {"present": False, "since": None}
+
+
+def save_presence(user_id: str, present: bool, since: str | None):
+    _ensure_user_dirs(user_id)
+    _presence_file(user_id).write_text(
+        json.dumps({"present": present, "since": since}, indent=2, ensure_ascii=False)
+    )
+
+
 def toggle_conge(date: str, type_conge: str, user_id: str = ""):
     assert type_conge in ("jour", "matin", "aprem")
     conges = load_conges(user_id)