fix(config_flow): per-host zeroconf updates — blank auto-detect hosts self-heal from the discovery address, a deliberately-different ADB host is never clobbered, same-IP with both hosts current is a no-op (F2)

custom_components/nvidia_shield/config_flow.py

@@ -280,21 +280,25 @@ class NvidiaShieldConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
             for entry in self._async_current_entries():
                 if getattr(entry, "unique_id", None) != mac:
                     continue
-                # Known device — update hosts only on a real IP change
-                # (core androidtv_remote pattern, simplified): an explicitly
-                # configured host that moved to the discovery address.
+                # Known device — per-host updates (t21 F2): each host is
+                # tracked independently against the discovery address.
+                # - a blank (auto-detect) host self-heals from the address;
+                # - a stale protocol host is the IP change and is updated;
+                # - a deliberately-different ADB host (an explicit override
+                #   that differs from both the address and the stored
+                #   protocol host) is never clobbered.
                 protocol_host = entry.options.get(CONF_PROTOCOL_HOST, "")
                 adb_host = entry.options.get(CONF_ADB_HOST, "")
-                if (protocol_host and protocol_host != host) or (
-                    adb_host and adb_host != host
-                ):
+                options = dict(entry.options)
+                if protocol_host != host:
+                    options[CONF_PROTOCOL_HOST] = host
+                if not adb_host or adb_host == protocol_host:
+                    # blank (self-heal) or auto-synced alongside the protocol
+                    # host — safe to follow the device address on discovery
+                    options[CONF_ADB_HOST] = host
+                if options != entry.options:
                     self.hass.config_entries.async_update_entry(
-                        entry,
-                        options={
-                            **entry.options,
-                            CONF_PROTOCOL_HOST: host,
-                            CONF_ADB_HOST: host,
-                        },
+                        entry, options=options
                     )
                     self.hass.config_entries.async_schedule_reload(entry.entry_id)
                 return self.async_abort(reason="already_configured")