style(filter-wheel): brace-style consistency in back_off_homing_w/w2

Match the Allman brace convention used by the surrounding homing
functions in operations.cpp. No behavior change.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: Alpaca233

firmware/controller/src/operations.cpp

@@ -100,9 +100,13 @@ void back_off_homing_w()
       is_preparing_for_homing_W = true;
       tmc4361A_readInt(&tmc4361[w], TMC4361A_EVENTS);
       if (homing_direction_W == HOME_NEGATIVE)  // approach the left switch
+      {
         tmc4361A_setSpeed(&tmc4361[w], tmc4361A_vmmToMicrosteps(&tmc4361[w], LEFT_DIR * HOMING_VELOCITY_W));
+      }
       else                                      // approach the right switch
+      {
         tmc4361A_setSpeed(&tmc4361[w], tmc4361A_vmmToMicrosteps(&tmc4361[w], RGHT_DIR * HOMING_VELOCITY_W));
+      }
     }
   }
 }
@@ -117,9 +121,13 @@ void back_off_homing_w2()
       is_preparing_for_homing_W2 = true;
       tmc4361A_readInt(&tmc4361[w2], TMC4361A_EVENTS);
       if (homing_direction_W2 == HOME_NEGATIVE)  // approach the left switch
+      {
         tmc4361A_setSpeed(&tmc4361[w2], tmc4361A_vmmToMicrosteps(&tmc4361[w2], LEFT_DIR * HOMING_VELOCITY_W));
+      }
       else                                       // approach the right switch
+      {
         tmc4361A_setSpeed(&tmc4361[w2], tmc4361A_vmmToMicrosteps(&tmc4361[w2], RGHT_DIR * HOMING_VELOCITY_W));
+      }
     }
   }
 }