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/schemas/chat.py

@@ -0,0 +1,69 @@
+from pydantic import BaseModel, field_serializer
+from datetime import datetime, timezone
+from typing import Optional, List
+
+
+def _as_utc_iso(dt: datetime | None) -> str | None:
+    """Serialize a datetime to an ISO-8601 string with explicit Z suffix.
+    SQLite stores datetimes without tzinfo; we treat all stored values as UTC."""
+    if dt is None:
+        return None
+    if dt.tzinfo is None:
+        dt = dt.replace(tzinfo=timezone.utc)
+    return dt.strftime('%Y-%m-%dT%H:%M:%S.%f')[:-3] + 'Z'
+
+
+class ConversationCreate(BaseModel):
+    type: str  # 'direct' | 'group'
+    name: Optional[str] = None
+    participant_ids: List[int]
+
+
+class MessageCreate(BaseModel):
+    body: str
+
+
+class ParticipantOut(BaseModel):
+    user_id: int
+    username: str
+    joined_at: datetime
+    last_read_at: Optional[datetime] = None
+
+    model_config = {"from_attributes": True}
+
+    @field_serializer('joined_at')
+    def ser_joined_at(self, v): return _as_utc_iso(v)
+
+    @field_serializer('last_read_at')
+    def ser_last_read_at(self, v): return _as_utc_iso(v)
+
+
+class MessageOut(BaseModel):
+    id: int
+    conversation_id: int
+    sender_id: int
+    sender_name: str
+    body: str
+    sent_at: datetime
+    is_deleted: bool
+
+    model_config = {"from_attributes": True}
+
+    @field_serializer('sent_at')
+    def ser_sent_at(self, v): return _as_utc_iso(v)
+
+
+class ConversationOut(BaseModel):
+    id: int
+    type: str
+    name: Optional[str] = None
+    is_system: bool
+    created_at: datetime
+    participants: List[ParticipantOut]
+    last_message: Optional[MessageOut] = None
+    unread_count: int
+
+    model_config = {"from_attributes": True}
+
+    @field_serializer('created_at')
+    def ser_created_at(self, v): return _as_utc_iso(v)