feat(backgrounds): add fireflies background

src/locales/en.json

@@ -1153,6 +1153,8 @@
       "noiseDesc": "Noise gradients with motion",
       "ripple": "Ripple",
       "rippleDesc": "Ripple wave effect",
+      "fireflies": "Fireflies",
+      "firefliesDesc": "Drifting glowing dots with pulsation",
       "geminiEffect": "Gemini Effect",
       "geminiEffectDesc": "SVG effect like Google Gemini",
       "speed": "Speed",

src/locales/fa.json

@@ -1035,6 +1035,8 @@
       "noiseDesc": "گرادیان‌های نویزی با حرکت",
       "ripple": "موج",
       "rippleDesc": "اثر موج دایره‌ای",
+      "fireflies": "کرم‌های شب‌تاب",
+      "firefliesDesc": "نقاط درخشان شناور با تپش",
       "geminiEffect": "افکت Gemini",
       "geminiEffectDesc": "افکت SVG مشابه Google Gemini",
       "speed": "سرعت",

src/locales/ru.json

@@ -1183,6 +1183,8 @@
       "noiseDesc": "Шумовые градиенты с движением",
       "ripple": "Ripple",
       "rippleDesc": "Волновой эффект при клике",
+      "fireflies": "Fireflies",
+      "firefliesDesc": "Дрейфующие светящиеся точки с пульсацией",
       "geminiEffect": "Gemini Effect",
       "geminiEffectDesc": "SVG-эффект как на Google Gemini",
       "speed": "Скорость",

src/locales/zh.json

@@ -1035,6 +1035,8 @@
       "noiseDesc": "带运动的噪声渐变",
       "ripple": "涟漪",
       "rippleDesc": "涟漪波纹效果",
+      "fireflies": "萤火虫",
+      "firefliesDesc": "漂浮闪烁的发光点",
       "geminiEffect": "Gemini效果",
       "geminiEffectDesc": "类似Google Gemini的SVG效果",
       "speed": "速度",