hbc/hbc_mini: add owner config; include in os_info; server applies to host

- owner: optional top-level config key in ~/.hbc.yaml / ~/.hbc.json
- Propagated into plugin configs at load time so os_info can include it
- os_info PLG data carries owner field when set
- udp: sets host.owner from os_info if not already configured server-side
- live.html: format event log timestamps as YYYY-MM-DD HH:MM:SS (24-hour)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

hbd/server/udp.py

@@ -368,6 +368,12 @@ def handle_datagram(msg: dict, addr, transport, ctx: dict):
                            if k not in ("ID", "plugin", "id", "name")}
             # Store plugin data with timestamp
             host.add_plugin_data(plugin_name, plugin_data, timestamp=now)
+
+            # If os_info reports an owner and none is configured server-side, apply it
+            if plugin_name == "os_info" and not host.owner:
+                reported_owner = plugin_data.get("owner")
+                if reported_owner:
+                    host.owner = reported_owner
             if DEBUG > 1:
                 print(f"Stored plugin data for {uname}: {plugin_name}")