setTyping: failure diagnostics (journald log on error) — API confirmed working via curl (200); if Element shows no indicator during turns, it's display-side

src/matrix.zig

@@ -316,7 +316,11 @@ pub fn setTyping(alloc: std.mem.Allocator, io: Io, token: []const u8, user_id: [
     else
         alloc.dupe(u8, "{\"typing\":false}") catch return;
     defer alloc.free(body);
-    _ = httpRaw(alloc, io, "PUT", url, token, "application/json", body) catch null;
+    if (httpRaw(alloc, io, "PUT", url, token, "application/json", body)) |resp| {
+        alloc.free(resp);
+    } else |e| {
+        std.debug.print("matrix_harness: setTyping failed: {s}\n", .{@errorName(e)});
+    }
 }
 
 pub fn sendText(alloc: std.mem.Allocator, io: Io, token: []const u8, room: []const u8, body: []const u8) ![]u8 {