feat(doorbell): add staged boot sequence and refactor main loop

boards/esp32-32e-4/esp32-32e-4.ino

@@ -21,55 +21,29 @@ void setup() {
 }
 
 void loop() {
-    // ── Read touch ──
+    // Read touch
     TouchEvent evt = display.readTouch();
 
-    // ── Touch debug ──
+    // Touch debug (useful for new boards)
     if(evt.pressed) {
         Serial.printf("[TOUCH] pressed: x=%d, y=%d\n", evt.x, evt.y);
     }
 
-    // ── State machine tick ──
+    // State machine tick
     logic.update();
 
-    // ── Render current screen ──
+    // Render current screen
     display.render(logic.getScreenState());
 
-    // ── Touch handling (tap gestures) ──
-    const ScreenState& st = logic.getScreenState();
-    int tile = logic.handleTouch(evt);
+    // Handle tap gestures
+    logic.handleTouch(evt);
 
-    // ── Hold gesture (for silencing alerts) ──
-    static int holdStartX = -1;
-    static int holdStartY = -1;
+    // Handle hold-to-silence gesture
+    logic.updateHold(evt);
 
-    if(st.deviceState == DeviceState::ALERTING) {
-        HoldState h = display.updateHold(HOLD_TO_SILENCE_MS);
-        if(h.completed) {
-            logic.silenceAlert();
-            holdStartX = -1;
-            holdStartY = -1;
-        }
-        if(h.started) {
-            holdStartX = evt.x;
-            holdStartY = evt.y;
-        }
-        if(holdStartX >= 0) {
-            display.updateHint(holdStartX, holdStartY, h.active);
-        }
-    } else {
-        holdStartX = -1;
-        holdStartY = -1;
-    }
+    // Serial console
+    logic.processSerial();
 
-    // ── Serial console ──
-    if(Serial.available()) {
-        String cmd = Serial.readStringUntil('\n');
-        cmd.trim();
-        if(cmd.length() > 0)
-            logic.onSerialCommand(cmd);
-    }
-
-    // Yield to WiFi/BT stack (prevents Task Watchdog timeout)
-    delay(10);
-}
+    // Yield to WiFi/BT stack
+    delay(LOOP_YIELD_MS);
+}