Expose BanGUI version in API responses (dashboard + config)

backend/app/models/config.py

@@ -1002,6 +1002,7 @@ class ServiceStatusResponse(BaseModel):
 
     online: bool = Field(..., description="Whether fail2ban is reachable via its socket.")
     version: str | None = Field(default=None, description="fail2ban version string, or None when offline.")
+    bangui_version: str = Field(..., description="BanGUI application version.")
     jail_count: int = Field(default=0, ge=0, description="Number of currently active jails.")
     total_bans: int = Field(default=0, ge=0, description="Aggregated current ban count across all jails.")
     total_failures: int = Field(default=0, ge=0, description="Aggregated current failure count across all jails.")

backend/app/models/server.py

@@ -24,6 +24,7 @@ class ServerStatusResponse(BaseModel):
     model_config = ConfigDict(strict=True)
 
     status: ServerStatus
+    bangui_version: str = Field(..., description="BanGUI application version.")
 
 
 class ServerSettings(BaseModel):