feat(frontend): confirm before stopping Xray and offer Start when it is stopped (#7104)

Stop sat next to Restart on the dashboard and fired on the first click. A
mis-click cut every proxy connection, and when the panel itself is reached
through that proxy the only way back was SSH (#7103).

Stop now opens a confirmation with Cancel focused. When Xray is stopped the
first button reads Start instead of Restart and Stop is disabled; in the
crashed state Stop stays enabled, because setting the manual-stop flag is
what halts the crash-recovery restart loop.

Closes #7103

internal/web/translation/ar-EG.json

@@ -151,6 +151,11 @@
       "xrayStatus": "Xray",
       "stopXray": "إيقاف",
       "restartXray": "إعادة تشغيل",
+      "startXray": "تشغيل",
+      "stopXrayDisabledHint": "Xray غير قيد التشغيل",
+      "stopXrayConfirmTitle": "إيقاف Xray؟",
+      "stopXrayConfirmContent": "سيؤدي إيقاف Xray إلى قطع جميع اتصالات البروكسي فورًا. هل تريد المتابعة؟",
+      "stopXrayConfirmOk": "إيقاف Xray",
       "xraySwitch": "النسخة",
       "xrayUpdates": "تحديثات Xray",
       "xraySwitchClickDesk": "اختار بحذر، النسخ القديمة ممكن ما تتوافقش مع الإعدادات الحالية.",