fix lint errors

Author: maksimkurb

AGENTS.md

@@ -10,6 +10,13 @@ make
 
 This runs `cmake -S . -B cmake-build ...` followed by `cmake --build cmake-build`.
 
+## C++
+
+When a multiplication produces a size or count for a wider integer type, make
+an operand the destination type so the multiplication itself is evaluated in
+that type. For example, use `std::size_t{16} * 1024U`, not `16 * 1024` or a cast
+of the completed product.
+
 ## Generated Files
 
 Never edit generated files by hand. Update the source schema/config and run the

src/api/server.cpp

@@ -109,7 +109,7 @@ bool read_gzip_file(const std::filesystem::path& path, std::string& output) {
     gzFile file = gzopen(path.c_str(), "rb");
     if (!file) return false;
 
-    std::array<char, 16 * 1024> buffer{};
+    std::array<char, std::size_t{16} * 1024U> buffer{};
     bool ok = true;
     for (;;) {
         const int count = gzread(file, buffer.data(), static_cast<unsigned>(buffer.size()));