updated folder structure

include/countdown_timer.h

@@ -0,0 +1,57 @@
+/**
+ * countdown_timer.h
+ * Header for focus timer functionality
+ */
+
+#ifndef COUNTDOWN_TIMER_H
+#define COUNTDOWN_TIMER_H
+
+#include "common.h"
+
+/**
+ * Start a new countdown timer
+ *
+ * @param seconds Total duration in seconds
+ * @param name Optional name for the timer session
+ * @return 1 if successful, 0 on failure
+ */
+int start_countdown_timer(int seconds, const char *name);
+
+/**
+ * Stop the current countdown timer
+ */
+void stop_countdown_timer();
+
+/**
+ * Check if a timer is currently active
+ *
+ * @return TRUE if timer is active, FALSE otherwise
+ */
+BOOL is_timer_active();
+
+/**
+ * Get the current timer display text
+ *
+ * @return Pointer to the display text string
+ */
+const char *get_timer_display();
+
+/**
+ * Temporarily hide the timer display (used when running external programs)
+ */
+void hide_timer_display(void);
+
+/**
+ * Restore the timer display after it was hidden
+ */
+void show_timer_display(void);
+
+/**
+ * Command handler for the "timer" command
+ *
+ * @param args Command arguments
+ * @return 1 to continue shell, 0 to exit
+ */
+int lsh_focus_timer(char **args);
+
+#endif // COUNTDOWN_TIMER_H