Add UART SET_LOG_LEVEL for runtime master ESP-IDF logging.

Expose the command via goTool CLI/REST and dashboard controls so log verbosity can be tuned without reflashing.

Co-authored-by: Cursor <cursoragent@cursor.com>

main/proto/uart_messages.proto

@@ -31,6 +31,8 @@ enum MessageType {
   CACHE_STATUS = 29;
   /** Host → master → slave → master: timestamp echo round-trip (latency test). */
   ESPNOW_ECHO_PING = 30;
+  /** Host → master: get/set ESP-IDF log level for tag "*" (global). */
+  SET_LOG_LEVEL = 31;
 }
 
 message UartMessage {
@@ -67,6 +69,8 @@ message UartMessage {
     CacheStatusResponse cache_status_response = 34;
     EspNowEchoPingRequest espnow_echo_ping_request = 35;
     EspNowEchoPingResponse espnow_echo_ping_response = 36;
+    SetLogLevelRequest set_log_level_request = 37;
+    SetLogLevelResponse set_log_level_response = 38;
   }
 }
 
@@ -329,6 +333,18 @@ message RestartResponse {
   uint32 client_id = 2;
 }
 
+/** Host → master: read/write global log level (esp_log_level_set("*", …)). */
+message SetLogLevelRequest {
+  bool write = 1;
+  /** esp_log_level_t: 0=NONE, 1=ERROR, 2=WARN, 3=INFO, 4=DEBUG, 5=VERBOSE */
+  uint32 level = 2;
+}
+
+message SetLogLevelResponse {
+  bool success = 1;
+  uint32 level = 2;
+}
+
 // Host → device: begin UART OTA (erase inactive OTA slot; device replies OTA_STATUS).
 message OtaStartPayload {
   uint32 total_size = 1;