feat(calendar): v5.8.0 calendrier & rappels + v5.7.0 database avancee (pt.2)

v5.8.0 (release 5.11.7) — Calendrier & Rappels :
- moteur de recurrence RRULE subset (daily/weekly/monthly, interval,
  count, until, byweekday, timezone) — app/services/recurrence.py
- vues calendar Jour / Semaine / Mois avec expansion des occurrences
  cote serveur (GET /db/{id}/calendar/api) et popover evenement
  (Time / Timezone / Repeat / Remind)
- rappels avant echeance (scan 60 s, table reminder_log, in-app +
  email, cible = personnes assignees) — app/services/reminders.py
- fuseaux horaires : users.timezone + reglages in-app, timezone par
  evenement, liste de zones (GET /db/timezones/api)
- notifications d'assignation sur PUT /db/pages/{id}/api et
  preferences etendues (reminders, assignments)
- template Meeting notes enrichi (Agenda, Notes — migration 12)
- migrations 11-12 ; 20 tests dedies ; suite complete 523 verte

v5.7.0 (release 5.11.6, termine avant cette session, reste dans
l'arbre sans commit) — Database Avancée Pt.2 :
- proprietes person + auto-proprietes (created/last-edited time & by)
- groupes de proprietes, vues sauvegardees par utilisateur
- swimlanes, WIP limits, cartes configurables, calendar drag & drop,
  gallery couvertures ; 12 tests dedies

app/services/notifications.py

@@ -121,13 +121,15 @@ def get_user_prefs(user_id: int, conn=None) -> dict:
                 "SELECT notification_prefs FROM users WHERE id=?", (user_id,)
             ).fetchone()
     if not row or not row["notification_prefs"]:
-        return {"comments": True, "mentions": True}
+        return {"comments": True, "mentions": True, "reminders": True, "assignments": True}
     try:
         prefs = json.loads(row["notification_prefs"])
     except (TypeError, json.JSONDecodeError):
         prefs = {}
     return {"comments": bool(prefs.get("comments", True)),
-            "mentions": bool(prefs.get("mentions", True))}
+            "mentions": bool(prefs.get("mentions", True)),
+            "reminders": bool(prefs.get("reminders", True)),
+            "assignments": bool(prefs.get("assignments", True))}
 
 
 def set_user_prefs(user_id: int, prefs: dict, conn=None) -> dict:
@@ -145,3 +147,67 @@ def set_user_prefs(user_id: int, prefs: dict, conn=None) -> dict:
             )
             conn.commit()
     return prefs
+
+
+def _person_ids(value) -> list[int]:
+    """Extract user ids from a stored ``person`` property value."""
+    ids: list[int] = []
+    if isinstance(value, dict):
+        value = [value]
+    if isinstance(value, list):
+        for person in value:
+            if isinstance(person, dict) and person.get("id"):
+                try:
+                    ids.append(int(person["id"]))
+                except (TypeError, ValueError):
+                    pass
+    return ids
+
+
+def notify_assignment(collection_id: int, page_id: int, page_title: str,
+                      old_props: dict, new_props: dict, actor_id: int | None,
+                      conn=None) -> list[int]:
+    """Notify users newly assigned via a ``person`` property.
+
+    Compares old vs new property values keyed by property id; users present
+    in the new value but not the old one get an in-app + (opt-in) email
+    notification. Returns the notified user ids.
+    """
+    def _run(c):
+        props = c.execute(
+            "SELECT id, name FROM collection_properties "
+            "WHERE collection_id=? AND prop_type='person'",
+            (collection_id,),
+        ).fetchall()
+        newly: list[int] = []
+        for p in props:
+            key = str(p["id"])
+            before = set(_person_ids((old_props or {}).get(key)))
+            after = _person_ids((new_props or {}).get(key))
+            for uid in after:
+                if uid not in before and uid != actor_id and uid not in newly:
+                    newly.append(uid)
+        for uid in newly:
+            create_notification(
+                uid, actor_id, "assignment",
+                title="Assigned to you",
+                message=page_title or "Untitled",
+                resource_type="db_page",
+                resource_id=page_id,
+                url=f"/collections/{collection_id}",
+                conn=c, commit=False,
+            )
+            mailer.notify_user(
+                uid, subject="[FlowDeck] Assigned to you",
+                body_text=page_title or "Untitled",
+                cta_url=f"/collections/{collection_id}",
+                prefs_key="assignments",
+            )
+        return newly
+
+    if conn is not None:
+        return _run(conn)
+    with get_conn() as c:
+        result = _run(c)
+        c.commit()
+        return result