update: Major Overhaul to all subsystems

backend/config.py

@@ -1,5 +1,5 @@
 from pydantic_settings import BaseSettings
-from typing import List
+from typing import List, Dict, Any
 import json
 
 
@@ -20,6 +20,7 @@ class Settings(BaseSettings):
     mqtt_admin_password: str = ""
     mqtt_secret: str = "change-me-in-production"
     mosquitto_password_file: str = "/etc/mosquitto/passwd"
+    mqtt_client_id: str = "bellsystems-admin-panel"
 
     # SQLite (MQTT data storage)
     sqlite_db_path: str = "./mqtt_data.db"
@@ -37,6 +38,30 @@ class Settings(BaseSettings):
     backend_cors_origins: str = '["http://localhost:5173"]'
     debug: bool = True
 
+    # Nextcloud WebDAV
+    nextcloud_url: str = ""
+    nextcloud_username: str = ""       # WebDAV login & URL path username
+    nextcloud_password: str = ""       # Use an app password for better security
+    nextcloud_dav_user: str = ""       # Override URL path username if different from login
+    nextcloud_base_path: str = "BellSystems"
+
+    # IMAP/SMTP Email
+    imap_host: str = ""
+    imap_port: int = 993
+    imap_username: str = ""
+    imap_password: str = ""
+    imap_use_ssl: bool = True
+    smtp_host: str = ""
+    smtp_port: int = 587
+    smtp_username: str = ""
+    smtp_password: str = ""
+    smtp_use_tls: bool = True
+    email_sync_interval_minutes: int = 15
+    # Multi-mailbox config (JSON array). If empty, legacy single-account IMAP/SMTP is used.
+    # Example item:
+    # {"key":"sales","label":"Sales","email":"sales@bellsystems.gr","imap_host":"...","imap_username":"...","imap_password":"...","smtp_host":"...","smtp_username":"...","smtp_password":"...","sync_inbound":true,"allow_send":true}
+    mail_accounts_json: str = "[]"
+
     # Auto-deploy (Gitea webhook)
     deploy_secret: str = ""
     deploy_project_path: str = "/app"
@@ -45,6 +70,14 @@ class Settings(BaseSettings):
     def cors_origins(self) -> List[str]:
         return json.loads(self.backend_cors_origins)
 
+    @property
+    def mail_accounts(self) -> List[Dict[str, Any]]:
+        try:
+            raw = json.loads(self.mail_accounts_json or "[]")
+            return raw if isinstance(raw, list) else []
+        except Exception:
+            return []
+
     model_config = {"env_file": ".env", "extra": "ignore"}