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>

src/esp32/main.cpp

@@ -7,6 +7,7 @@
 #include "BROSE9323.h"
 #include "config.h"
 #include "display/frames.h"
+#include "display/status_screen.h"
 #include "logic/display_controller.h"
 #include "logic/status_led.h"
 #include "nano_link/nano_flash_bridge.h"
@@ -19,6 +20,7 @@
 NanoLink nano(Serial2, NANO_RX_PIN, NANO_TX_PIN, RELAY_PIN, NANO_RESET_PIN);
 BROSE9323 display(DISPLAY_WIDTH, DISPLAY_HEIGHT, PANEL_WIDTH);
 FlipdotFrames frames(display);
+StatusScreen status(display, nano);
 DisplayController controller(nano, frames);
 
 // Flashing the Nano over WiFi: restart it into its bootloader, switch it off afterwards.
@@ -32,12 +34,14 @@ void setup()
 {
 	Serial.begin(115200);
 	pinMode(LED_PIN, OUTPUT);
-	nano.begin(); // display off until the main code runs
+	nano.begin(); // display off until something is shown
 
 	// Decided first, before anything that could crash
 	BootMode boot_mode = firmwareGuardBegin();
 
-	wifiBegin();
+	if (boot_mode == BootMode::Normal)
+		status.show("Connecting", "to WiFi...", true);
+	wifiBegin(); // starts the recovery app when it fails
 	otaBegin();
 
 	if (boot_mode == BootMode::SafeMode)
@@ -46,19 +50,20 @@ void setup()
 		// then try the main code once more
 		firmwareGuardSafeModeEnded();
 		rebootToRecovery(RecoveryReason::Crash);
+		status.show("Crashed 3x", "OTA only");
 		otaOnlyMode(SAFE_MODE_TIME, LED_PIN);
 		ESP.restart();
 	}
 	if (boot_mode == BootMode::PanicWindow)
+	{
+		status.show("Crashed!", "OTA open 15s");
 		otaOnlyMode(OTA_PANIC_WINDOW, LED_PIN);
+	}
 
 	flashBridge.begin();
 
-	nano.on();
-	display.begin(&nano.stream());
-	display.setTiming(FLIP_TIME);
-	// Shown until the time is synced
-	frames.message("Connecting...");
+	// Shown until the time is synced over NTP
+	status.show("Getting", "the time...", true);
 
 	configTzTime(TIMEZONE, NTP_SERVER);
 	homeAssistantBegin(controller);
@@ -82,7 +87,7 @@ void loop()
 
 	struct tm now = {};
 	bool time_valid = getLocalTime(&now, 0);
-	controller.update(millis(), time_valid, now.tm_hour, now.tm_min);
+	controller.update(millis(), time_valid, now.tm_hour, now.tm_min, wifiConnected());
 
 	digitalWrite(LED_PIN, statusLedLevel(millis(), wifiConnected(), nano.isOn()));
 }