feat(mesh): RF-params settings UI + expose lora_radio_params in mesh.status

Device panel gets MeshCore RF fields (frequency MHz, bandwidth kHz, SF, CR)
wired to mesh.configure's validated lora_radio_params; shown only for
MeshCore radios, all-empty leaves the radio's flashed settings untouched.
Human units in the UI, firmware field units on the wire. Per operator
direction the panel's static stat rows duplicating editable fields (name,
region, channel) are dropped — the editable control is the display. Stale
'adjust via a MeshCore client' hints updated: the node programs the radio now.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

core/archipelago/src/api/rpc/mesh/status.rs

@@ -41,6 +41,10 @@ impl RpcHandler {
             // live radio-reported `region`): the configured LoRa region and
             // the firmware pin ("meshcore"|"meshtastic"|"reticulum"|null=auto).
             obj.insert("lora_region".into(), config.lora_region.clone().into());
+            obj.insert(
+                "lora_radio_params".into(),
+                serde_json::to_value(config.lora_radio_params).unwrap_or_default(),
+            );
             obj.insert(
                 "device_kind".into(),
                 config