Code improvements / Fix warnings

- Fix CodeQL warnings
- Port lots of improvements/fixes from PR #225
- replace 'array_hexstr' and '%*H' format by sdk function 'format_hex'
- Add 'noreturn' attribute in 'main.c'

src_features/performPrivacyOperation/cmd_performPrivacyOperation.c

@@ -3,6 +3,7 @@
 
 #include "feature_performPrivacyOperation.h"
 #include "common_ui.h"
+#include "uint_common.h"
 
 #define P2_PUBLIC_ENCRYPTION_KEY 0x00
 #define P2_SHARED_SECRET         0x01
@@ -106,11 +107,11 @@ void handlePerformPrivacyOperation(uint8_t p1,
         for (uint8_t i = 0; i < 32; i++) {
             privateKeyData[i] = tmpCtx.publicKeyContext.publicKey.W[32 - i];
         }
-        snprintf(strings.common.fullAmount,
-                 sizeof(strings.common.fullAmount) - 1,
-                 "%.*H",
-                 32,
-                 privateKeyData);
+        format_hex(privateKeyData,
+                   32,
+                   strings.common.fullAmount,
+                   sizeof(strings.common.fullAmount) - 1);
+
         if (p2 == P2_PUBLIC_ENCRYPTION_KEY) {
             ui_display_privacy_public_key();
         } else {

src_features/performPrivacyOperation/feature_performPrivacyOperation.h

@@ -1,3 +1,8 @@
+#ifndef _PERFORM_PRIVACY_OPERATION_H_
+#define _PERFORM_PRIVACY_OPERATION_H_
+
 #include "shared_context.h"
 
 uint32_t set_result_perform_privacy_operation(void);
+
+#endif  // _PERFORM_PRIVACY_OPERATION_H_