🧑‍💻 Handle PLR in manage_media

Marlin/src/feature/powerloss.cpp

  *
  * If a saved state exists send 'M1000 S' to initiate job recovery.
  */
-void PrintJobRecovery::check() {
+bool PrintJobRecovery::check() {
   //if (!card.isMounted()) card.mount();
+  bool success = false;
   if (card.isMounted()) {
     load();
-    if (!valid()) return cancel();
-    queue.inject(F("M1000S"));
+    success = valid();
+    if (!success)
+      cancel();
+    else
+      queue.inject(F("M1000S"));
   }
+  return success;
 }
 
 /**

Marlin/src/feature/powerloss.h

     static void open(const bool read) { card.openJobRecoveryFile(read); }
     static void close() { file.close(); }
 
-    static void check();
+    static bool check();
     static void resume();
     static void purge();
 
-    static void cancel() { purge(); IF_DISABLED(NO_SD_AUTOSTART, card.autofile_begin()); }
+    static void cancel() { purge(); }
 
     static void load();
     static void save(const bool force=ENABLED(SAVE_EACH_CMD_MODE), const float zraise=POWER_LOSS_ZRAISE, const bool raised=false);

Marlin/src/gcode/feature/powerloss/M413.cpp

     if (parser.seen_test('P')) recovery.purge();
     if (parser.seen_test('D')) recovery.debug(F("M413"));
     if (parser.seen_test('O')) recovery._outage(true);
-    if (parser.seen_test('C')) recovery.check();
+    if (parser.seen_test('C')) (void)recovery.check();
     if (parser.seen_test('E')) SERIAL_ECHOF(recovery.exists() ? F("PLR Exists\n") : F("No PLR\n"));
     if (parser.seen_test('V')) SERIAL_ECHOF(recovery.valid() ? F("Valid\n") : F("Invalid\n"));
   #endif

Marlin/src/sd/cardreader.cpp

 
   DEBUG_ECHOLNPGM("First mount.");
 
-  #if ENABLED(POWER_LOSS_RECOVERY)
-    recovery.check();               // Check for PLR file. (If not there then call autofile_begin)
-  #elif DISABLED(NO_SD_AUTOSTART)
-    autofile_begin();               // Look for auto0.g on the next loop
-  #endif
+  bool do_auto = true; UNUSED(do_auto);
+
+  // Check for PLR file.
+  TERN_(POWER_LOSS_RECOVERY, if (recovery.check()) do_auto = false);
+
+  // Look for auto0.g on the next idle()
+  IF_DISABLED(NO_SD_AUTOSTART, if (do_auto) autofile_begin());
 }
 
 /**