Consolidate LoRa params / preset logic and fix display of preset values (#9413)

* Consolidate LoRa params / preset logic and fix display of preset values

* Move preset coercion logic to RadioInterface

* Fix some warnings

* Fix warnings

* STM32 fix

* Add unit tests

* Update src/mesh/RadioInterface.h

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

src/mesh/RadioInterface.h

@@ -7,6 +7,9 @@
 #include "airtime.h"
 #include "error.h"
 
+// Forward decl to avoid a direct include of generated config headers / full LoRaConfig definition in this widely-included file.
+typedef struct _meshtastic_Config_LoRaConfig meshtastic_Config_LoRaConfig;
+
 #define MAX_TX_QUEUE 16 // max number of packets which can be waiting for transmission
 
 #define MAX_LORA_PAYLOAD_LEN 255 // max length of 255 per Semtech's datasheets on SX12xx
@@ -115,6 +118,12 @@ class RadioInterface
 
     virtual ~RadioInterface() {}
 
+    /**
+     * Coerce LoRa config fields (bandwidth/spread_factor) derived from presets.
+     * This is used during early bootstrapping so UIs that display these fields directly remain consistent.
+     */
+    static void bootstrapLoRaConfigFromPreset(meshtastic_Config_LoRaConfig &loraConfig);
+
     /**
      * Return true if we think the board can go to sleep (i.e. our tx queue is empty, we are not sending or receiving)
      *