Add triple-tap lights-off and fix LED pin to D5

- Triple tap turns off LEDs; any subsequent tap or hold resumes the current show
- Change LED_DATA_PIN default from 6 to 5 across config, docs, and wiring diagram
- Fix Makefile upload to pass --input-dir so it uses the pre-built binary

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

DETAILS.md

@@ -43,6 +43,7 @@ Button handling uses the [OneButton](https://github.com/mathertel/OneButton) lib
 
 - **Single tap** → next show
 - **Double tap** → previous show
+- **Triple tap** → lights off; any subsequent tap or hold resumes the current show
 - **Long press** → reset to show 0
 
 The key timing values (configured via `setClickMs` and `setPressMs`):
@@ -104,12 +105,12 @@ Edit `config.h`:
 // WS2812B (default)
 #define LED_TYPE    WS2812B
 #define COLOR_ORDER GRB
-#define LED_DATA_PIN 6
+#define LED_DATA_PIN 5
 
 // APA102 / Dotstar (two-wire)
 // #define LED_TYPE     APA102
 // #define COLOR_ORDER  BGR
-// #define LED_DATA_PIN  6
+// #define LED_DATA_PIN  5
 // #define LED_CLOCK_PIN 7
 ```
 
@@ -129,8 +130,8 @@ static CRGB leds_a[NUM_LEDS];
 static CRGB leds_b[NUM_LEDS];
 
 void leds_begin() {
-    FastLED.addLeds<LED_TYPE, 6, COLOR_ORDER>(leds_a, NUM_LEDS);
-    FastLED.addLeds<LED_TYPE, 5, COLOR_ORDER>(leds_b, NUM_LEDS);
+    FastLED.addLeds<LED_TYPE, 5, COLOR_ORDER>(leds_a, NUM_LEDS);
+    FastLED.addLeds<LED_TYPE, 6, COLOR_ORDER>(leds_b, NUM_LEDS);
     FastLED.setBrightness(MAX_BRIGHTNESS);
     FastLED.clear(true);
 }