manuals tidy tier 1: suffixes, params, switches, equals-default

source/core/rendering/menu.cpp

@@ -228,7 +228,7 @@ namespace Menu {
         pct = std::min(pct, 100);
         char buf[8];
         std::snprintf(buf, sizeof(buf), "%d%%", pct);
-        return std::string(buf);
+        return {buf};
     }
 
     // Canvi +/- d'un volum en steps de 0.05 (5%) amb clamping

source/core/rendering/overlay.cpp

@@ -418,7 +418,7 @@ namespace Overlay {
     void setRenderInfoSegments(const char* s0, const char* s1, const char* s2, const char* s3, unsigned int mono_mask) {
         const char* segs[INFO_SEGMENT_COUNT] = {s0, s1, s2, s3};
         for (int i = 0; i < INFO_SEGMENT_COUNT; i++) {
-            info_segments_[i].mono_digits = (((mono_mask >> i) & 1U) != 0u);
+            info_segments_[i].mono_digits = (((mono_mask >> i) & 1U) != 0U);
             if (segs[i] != nullptr && *segs[i] != '\0') {
                 info_segments_[i].text = segs[i];
                 info_segments_[i].visible = true;