Add Battery Sensor functionality and integrate with display and app

- Implement BatterySensor class to monitor battery voltage and status.
- Update App to initialize and loop BatterySensor.
- Modify FaceRenderer to display battery status on the screen.
- Enhance Display class with a method to draw battery icon.
- Update WebUI to include battery status in the interface.
- Refactor WiFiManager to improve connection handling and logging.
- Adjust Settings to include factory reset functionality.
- Improve HTML structure and styling in WebUI for better user experience.

src/app/App.cpp

@@ -11,6 +11,7 @@
 
 #include "../ui/Display.h"
 #include "../sensors/MoistureSensor.h"
+#include "../sensors/BatterySensor.h"
 #include "../ui/FaceRenderer.h"
 
 static Settings settings;
@@ -21,6 +22,7 @@ static WebhookService webhook;
 
 static Display display;
 static MoistureSensor moisture;
+static BatterySensor battery;
 static FaceRenderer face;
 
 static unsigned long bootMs = 0;
@@ -37,15 +39,27 @@ static PlantEventType moodToEvent(FaceRenderer::Mood m) {
 void App::setup() {
   bootMs = millis();
 
+  Serial.begin(115200);
+  delay(100);
+  Serial.println("\n\n=== FacePlant Starting ===");
+  Serial.print("Firmware: ");
+  Serial.println(PB_VERSION);
+
   settings.begin();
   bool forceSetup = BootTrigger::checkAndConsume();
 
+  Serial.print("Force setup mode: ");
+  Serial.println(forceSetup ? "YES" : "NO");
+  Serial.print("Saved WiFi SSID: ");
+  Serial.println(settings.hasWiFi() ? settings.wifiSsid() : "(none)");
+
   display.begin();
   display.showStatus("FacePlant", "Starting...");
 
   wifi.begin(settings, forceSetup);
 
   moisture.begin(settings);
+  battery.begin();
   face.begin(display, settings);
 
   webhook.begin(settings);
@@ -55,16 +69,39 @@ void App::setup() {
 
   lastMood = face.mood();
   lastDead = face.isDeadMode();
+
+  Serial.println("=== Setup Complete ===\n");
 }
 
 void App::loop() {
+  static bool lastConnected = false;
+  static unsigned long lastDisplayUpdate = 0;
+
   BootTrigger::clearAfterStableUptime();
 
   wifi.loop();
   web.loop();
 
+  // Show WiFi status on display during connection attempts
+  bool currentConnected = wifi.connected();
+  if (currentConnected != lastConnected) {
+    if (currentConnected) {
+      Serial.println("[App] WiFi connected - showing on display");
+      display.showStatus("WiFi Connected!", wifi.ssid().c_str());
+      delay(2000);
+    } else if (wifi.mode() == NET_STA) {
+      Serial.println("[App] WiFi disconnected");
+      if (millis() - lastDisplayUpdate > 5000) {
+        display.showStatus("WiFi", "Connecting...");
+        lastDisplayUpdate = millis();
+      }
+    }
+    lastConnected = currentConnected;
+  }
+
   moisture.loop();
-  face.loop(moisture);
+  battery.loop();
+  face.loop(moisture, battery);
 
   // Webhook events on state transitions
   FaceRenderer::Mood m = face.mood();