feat: bump client-services (accumulated feature work + deploy fixes)

Snapshot of in-progress work across local_backend, manager_dashboard,
and waiter_pwa (pricing, chat, fiscal, prep zones, recovery codes, CRM,
inventory, permissions), plus the nginx/docker-compose deploy fixes for
the Unraid + NPM reverse-proxy setup.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

local_backend/services/chat_service.py

@@ -0,0 +1,88 @@
+"""
+Chat service — system group bootstrap helpers.
+"""
+from datetime import datetime, timezone
+from sqlalchemy.orm import Session
+
+from models.chat import Conversation, ConversationParticipant
+from models.user import User
+
+
+def _utcnow() -> datetime:
+    return datetime.now(timezone.utc)
+
+
+def ensure_system_group(db: Session) -> Conversation:
+    """
+    Guarantee that the single system-wide 'Ομάδα' group conversation exists.
+    If it is missing, create it and add all currently active users as participants.
+    Returns the (possibly freshly created) Conversation.
+    """
+    existing = (
+        db.query(Conversation)
+        .filter(Conversation.is_system == True)  # noqa: E712
+        .first()
+    )
+    if existing:
+        return existing
+
+    # Determine creator — first admin/manager user, or user id=1 as fallback
+    creator = (
+        db.query(User)
+        .filter(User.perm_access_dashboard == True, User.is_active == True)  # noqa: E712
+        .order_by(User.id)
+        .first()
+    )
+    creator_id = creator.id if creator else 1
+
+    conv = Conversation(
+        type="group",
+        name="Ομάδα",
+        is_system=True,
+        created_by=creator_id,
+    )
+    db.add(conv)
+    db.flush()  # get conv.id before adding participants
+
+    active_users = (
+        db.query(User).filter(User.is_active == True).all()  # noqa: E712
+    )
+    now = _utcnow()
+    for u in active_users:
+        participant = ConversationParticipant(
+            conversation_id=conv.id,
+            user_id=u.id,
+            joined_at=now,
+        )
+        db.add(participant)
+
+    db.commit()
+    db.refresh(conv)
+    return conv
+
+
+def add_user_to_system_group(db: Session, user_id: int) -> None:
+    """
+    Add a user to the system group if not already a participant.
+    Safe to call even when the system group does not exist yet (it will be created).
+    """
+    conv = ensure_system_group(db)
+
+    already = (
+        db.query(ConversationParticipant)
+        .filter(
+            ConversationParticipant.conversation_id == conv.id,
+            ConversationParticipant.user_id == user_id,
+        )
+        .first()
+    )
+    if already:
+        return
+
+    participant = ConversationParticipant(
+        conversation_id=conv.id,
+        user_id=user_id,
+        joined_at=_utcnow(),
+    )
+    db.add(participant)
+    db.commit()