Show status messages on the display

- Clock firmware: 'Connecting to WiFi...' and 'Getting the time...' at
  boot, 'Crashed!' in the OTA-only modes, and 'No WiFi' with the time
  when WiFi is down for over a minute (new DisplayController screen)
- Recovery app: shows its reason, the setup WiFi name, or its IP address,
  then powers the display off (flipdots keep the image)
- StatusScreen and drawTextLines shared by both apps
- Driver: ESP begin() no longer draws 'ESP Connected'
- Tests: No WiFi screen, short reason texts (70 total)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lib/BROSE9323/BROSE9323.cpp

@@ -18,13 +18,10 @@ BROSE9323::BROSE9323(uint8_t w, uint8_t h, uint8_t pw, uint16_t ft) : Adafruit_G
 }
 
 #ifdef ESPSERIAL
+// Only sets the serial port; the first frame is up to the caller
 void BROSE9323::begin(Stream *s)
 {
   stream = s;
-  fillScreen(0);
-  setCursor(0, 4);
-  print("ESP Connected");
-  display();
 }
 #else
 void BROSE9323::begin(void)