Remove dead code

- wire.with_figure: the device uses dataclasses.replace directly.
- DeviceConnected/DeviceDisconnected: emitted, never subscribed to, and a duplicate
  of ConnectionChanged(target="firmware").
- ScreenService.toggle(): never called.
- GET /api/lirc (LircConfigOut, api.lircConfig): no front-end reads it.
- POST /api/volume's delta_percent (api.nudgeVolume): no front-end sends it.
- LibraryCache.shrink_stored_covers: a one-off migration that re-read every cover
  header on every scan. _INDEX_VERSION 7 rebuilds any cache that could still need it.
- Firmware: the MFRC522 library and its unused globals (lib/nfc/rc522.c is the
  driver in use), and mfrc_version.h, a reader test sketch nothing included.

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

esp-firmware/platformio.ini

@@ -25,7 +25,6 @@ upload_port = /dev/ttyUSB0
 monitor_speed = 115200
 build_src_filter = +<*> -<host_test.cpp>
 lib_deps = 
-	miguelbalboa/MFRC522@1.4.12
 	bxparks/AceButton@1.10.1
 
 [env:native]

esp-firmware/src/main.cpp

@@ -1,7 +1,6 @@
 #include <Arduino.h>
 #include "rc522.h"
 #include "SPI.h"
-#include <MFRC522.h>
 #include "rotary_encoder.h"
 
 #include "containers/LedStripRGBW.h"
@@ -21,9 +20,6 @@
 #include "TaskLed.h"
 
 // -------------------------------------------------- RFID Reader ----------------------------------------
-MFRC522 rfid;
-MFRC522::MIFARE_Key key;
-
 void tagHandler(uint8_t *sn)
 {
   if (sn != nullptr)

esp-firmware/src/mfrc_version.h

@@ -1,64 +0,0 @@
-
-#include <SPI.h>
-#include <MFRC522.h>
-
-#define RST_PIN 5           // Configurable, see typical pin layout above
-#define SS_PIN 23          // Configurable, see typical pin layout above
-
-MFRC522 mfrc522(SS_PIN, RST_PIN);   // Create MFRC522 instance
-
-//*****************************************************************************************//
-void setup() {
-  Serial.begin(115200);
-  SPI.begin(22, 19, 18, 23); // Init SPI bus
-  mfrc522.PCD_Init();                                              // Init MFRC522 card
-}
-/**
- * Helper routine to dump a byte array as hex values to Serial.
- */
-void PrintHex(byte *buffer, byte bufferSize) {
-  for (byte i = 0; i < bufferSize; i++) {
-    Serial.print(buffer[i] < 0x10 ? " 0" : " ");
-    Serial.print(buffer[i], HEX);
-  }
-}
-
-//*****************************************************************************************//
-
-void loop() {
-
-  // Look for new cards
-  if ( !mfrc522.PICC_IsNewCardPresent()) {
-    return;
-  }
-  if ( !mfrc522.PICC_ReadCardSerial()) {
-    return;
-  }
-  
-  //mfrc522.PICC_DumpDetailsToSerial(&(mfrc522.uid)); //dump some details about the card
-  
-  Serial.print("NewCard");
-  PrintHex(mfrc522.uid.uidByte, mfrc522.uid.size);
-  Serial.println("");
-
-  // Check if Card was removed
-  bool cardRemoved = false;
-  int counter = 0;
-  bool current, previous;
-  previous = !mfrc522.PICC_IsNewCardPresent();
-    
-  while(!cardRemoved){
-    current =!mfrc522.PICC_IsNewCardPresent();
-
-    if (current && previous) counter++;
-
-    previous = current;
-    cardRemoved = (counter>2);      
-    delay(50);
-  }
-  
-  Serial.println("Card was removed");
-  delay(500); //change value if you want to read cards faster
-  mfrc522.PICC_HaltA();
-  mfrc522.PCD_StopCrypto1();
-}