Add LED ring boot chase and connect flash animations.

Give pods quick visual feedback on power-up and when a slave joins the master.

Co-authored-by: Cursor <cursoragent@cursor.com>

main/led_ring.h

@@ -19,7 +19,9 @@ typedef enum {
   LED_CMD_PROGRESS,
   LED_CMD_BLINK,
   LED_CMD_FIND_ME,
-  LED_CMD_BATTERY_LOW
+  LED_CMD_BATTERY_LOW,
+  LED_CMD_BOOT,
+  LED_CMD_CONNECTED
 } led_mode_t;
 
 typedef struct {
@@ -53,4 +55,10 @@ void led_ring_find_me(void);
 /** First 4 LEDs red at ~10 % for 5 s, then off (blocking in LED task). */
 void led_ring_show_battery_low(void);
 
+/** Chase: each ring LED lights once in sequence (~1 s total). */
+void led_ring_boot_anim(void);
+
+/** Every second LED briefly blue (join / reconnect). */
+void led_ring_connected_anim(void);
+
 #endif