testing: use std.Build.TranslateC instead of @cImport

src/lib/enum.zig

@@ -93,18 +93,18 @@ test "abi by removing a key" {
 }
 
 /// Verify that for every key in enum T, there is a matching declaration in
-/// `ghostty.h` with the correct value.
+/// `ghostty.h` with the correct value. This should only ever be called inside a `test`
+/// because the `ghostty.h` module is only available then.
 pub fn checkGhosttyHEnum(comptime T: type, comptime prefix: []const u8) !void {
     const info = @typeInfo(T);
 
     try std.testing.expect(info == .@"enum");
     try std.testing.expect(info.@"enum".tag_type == c_int);
+    try std.testing.expect(info.@"enum".is_exhaustive == true);
 
     @setEvalBranchQuota(1000000);
 
-    const c = @cImport({
-        @cInclude("ghostty.h");
-    });
+    const c = @import("ghostty.h");
 
     var set: std.EnumSet(T) = .initFull();
 
@@ -137,8 +137,8 @@ pub fn checkGhosttyHEnum(comptime T: type, comptime prefix: []const u8) !void {
         var it = set.iterator();
         while (it.next()) |v| {
             var buf: [128]u8 = undefined;
-            const n = std.ascii.upperString(&buf, @tagName(v));
-            std.log.err("ghostty.h is missing value for {s}{s}, {t}", .{ prefix, n, v });
+            const upper_string = std.ascii.upperString(&buf, @tagName(v));
+            std.log.err("ghostty.h is missing value for {s}{s}", .{ prefix, upper_string });
         }
         return e;
     };