Row_printNanoseconds() code portability improvements

Add explicit casts to fix the "-Wshorten-64-to-32" warning (enabled by
default in Clang 19).

Also shorten the type width for some local variables (where "uint32_t"
is enough and no need for "unsigned long").

Signed-off-by: Kang-Che Sung <explorer09@gmail.com>

Author: Explorer09

Row.c

@@ -428,23 +428,23 @@ void Row_printNanoseconds(RichString* str, unsigned long long totalNanoseconds,
    }
 
    unsigned long long totalSeconds = totalMicroseconds / 1000000;
-   unsigned long microseconds = totalMicroseconds % 1000000;
+   uint32_t microseconds = totalMicroseconds % 1000000;
    if (totalSeconds < 60) {
       int width = 5;
-      unsigned long fraction = microseconds / 10;
+      uint32_t fraction = microseconds / 10;
       if (totalSeconds >= 10) {
          width--;
          fraction /= 10;
       }
-      len = xSnprintf(buffer, sizeof(buffer), "%u.%0*lus ", (unsigned int)totalSeconds, width, fraction);
+      len = xSnprintf(buffer, sizeof(buffer), "%u.%0*lus ", (unsigned int)totalSeconds, width, (unsigned long)fraction);
       RichString_appendnAscii(str, baseColor, buffer, len);
       return;
    }
 
    if (totalSeconds < 600) {
-      unsigned int minutes = totalSeconds / 60;
-      unsigned int seconds = totalSeconds % 60;
-      unsigned int milliseconds = microseconds / 1000;
+      unsigned int minutes = (unsigned int)totalSeconds / 60;
+      unsigned int seconds = (unsigned int)totalSeconds % 60;
+      unsigned int milliseconds = (unsigned int)(microseconds / 1000);
       len = xSnprintf(buffer, sizeof(buffer), "%u:%02u.%03u ", minutes, seconds, milliseconds);
       RichString_appendnAscii(str, baseColor, buffer, len);
       return;