frontend: RTL sidebar arrow placement + reverse-geocode clinic location

- Arabic RTL: stack the collapse arrow/bell above the nav icons instead of
  pinning them to the opposite edge; mirror the panel-toggle glyph; flip the
  notifications popover to open toward the content side.
- "Use my current location" now reverse-geocodes (OpenStreetMap Nominatim) to
  fill address/city/country, not just latitude/longitude, with a graceful
  coordinates-only fallback. New settings.location.geoPartial key in all 5 locales.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/lib/i18n/locales/ar/translation.json

@@ -2037,7 +2037,8 @@
       "useMyLocation": "استخدام موقعي الحالي",
       "locating": "جارٍ تحديد الموقع…",
       "geoUnsupported": "الموقع غير متاح على هذا الجهاز.",
-      "geoError": "تعذّر الحصول على موقعك. تحقّق من الأذونات وحاول مرة أخرى."
+      "geoError": "تعذّر الحصول على موقعك. تحقّق من الأذونات وحاول مرة أخرى.",
+      "geoPartial": "تم إدخال الإحداثيات — الرجاء إضافة تفاصيل العنوان يدويًا."
     },
     "signing": {
       "keyTitle": "مفتاح التوقيع",

frontend/lib/i18n/locales/de/translation.json

@@ -2017,7 +2017,8 @@
       "useMyLocation": "Aktuellen Standort verwenden",
       "locating": "Standort wird ermittelt …",
       "geoUnsupported": "Standort ist auf diesem Gerät nicht verfügbar.",
-      "geoError": "Standort konnte nicht ermittelt werden. Bitte Berechtigungen prüfen und erneut versuchen."
+      "geoError": "Standort konnte nicht ermittelt werden. Bitte Berechtigungen prüfen und erneut versuchen.",
+      "geoPartial": "Koordinaten eingetragen – bitte Adressdetails manuell ergänzen."
     },
     "signing": {
       "keyTitle": "Signierschlüssel",

frontend/lib/i18n/locales/en/translation.json

@@ -2017,7 +2017,8 @@
       "useMyLocation": "Use my current location",
       "locating": "Locating…",
       "geoUnsupported": "Location isn't available on this device.",
-      "geoError": "Couldn't get your location. Check permissions and try again."
+      "geoError": "Couldn't get your location. Check permissions and try again.",
+      "geoPartial": "Filled the coordinates — please add the address details manually."
     },
     "signing": {
       "keyTitle": "Signing key",

frontend/lib/i18n/locales/fr/translation.json

@@ -2017,7 +2017,8 @@
       "useMyLocation": "Utiliser ma position actuelle",
       "locating": "Localisation…",
       "geoUnsupported": "La localisation n'est pas disponible sur cet appareil.",
-      "geoError": "Impossible d'obtenir votre position. Vérifiez les autorisations et réessayez."
+      "geoError": "Impossible d'obtenir votre position. Vérifiez les autorisations et réessayez.",
+      "geoPartial": "Coordonnées renseignées — veuillez ajouter l'adresse manuellement."
     },
     "signing": {
       "keyTitle": "Clé de signature",

frontend/lib/i18n/locales/so/translation.json

@@ -2017,7 +2017,8 @@
       "useMyLocation": "Isticmaal goobtayda hadda",
       "locating": "Waa la helayaa goobta…",
       "geoUnsupported": "Goobta laguma heli karo qalabkan.",
-      "geoError": "Lama heli karin goobtaada. Hubi oggolaanshaha oo isku day mar kale."
+      "geoError": "Lama heli karin goobtaada. Hubi oggolaanshaha oo isku day mar kale.",
+      "geoPartial": "Isudhigyada waa la buuxiyay — fadlan gacanta ku gali faahfaahinta ciwaanka."
     },
     "signing": {
       "keyTitle": "Furaha saxiixa",