Add source code.

include/Status.h

@@ -0,0 +1,42 @@
+#pragma once
+
+#include <ctime>
+#include <optional>
+#include <string>
+#include <vector>
+
+// Prompt:      free to accept prompts.
+// LimitReset:  computed - a Wait whose time has passed (can also be set by hand).
+// The enum order is the sort order of the panels.
+enum class StatusKind { Prompt, LimitReset, Testing, Wait, Uploading, Frozen, Done };
+
+struct Status {
+    StatusKind kind = StatusKind::Prompt;
+    std::time_t waitUntil = 0;  // only meaningful when kind == Wait
+};
+
+namespace StatusUtil {
+
+Status make(StatusKind kind);
+
+// User input such as "testing" or "wait 16:30". A wait time that has already
+// passed today is taken to mean tomorrow.
+std::optional<Status> parse(const std::string& text, std::time_t now);
+
+// Database representation, e.g. "testing" or "wait 2026-10-17T16:30".
+std::string serialize(const Status& status);
+std::optional<Status> deserialize(const std::string& text);
+
+// The status shown to the user: an expired wait becomes LimitReset.
+Status effective(const Status& status, std::time_t now);
+
+std::string label(const Status& status);  // "Prompt", "Limit reset", "Wait 16:30", ...
+std::string kindName(StatusKind kind);    // lowercase token: "prompt", "limit-reset", ...
+std::vector<StatusKind> allKinds();
+// Accepts "limit-reset", "limit_reset", "limitreset", "reset"; "available" is an
+// old name for "prompt".
+std::optional<StatusKind> kindFromName(const std::string& name);
+int rank(StatusKind kind);                // sort order
+bool isBusy(StatusKind kind);             // does this status hold the account?
+
+}  // namespace StatusUtil