Update toggle labels and restore image

Update locale keys for toggle functionality from 'editToggle' to 'saveToggle' and revert 'opengraph.jpg' to its previous state.

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Replit-Commit-Session-Id: 77cfe984-2c65-4152-bb7a-0df28274fe66
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Replit-Commit-Event-Id: 05fe07ec-5152-4ad6-985f-c842d7501206
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artifacts/tx-os/src/locales/ar.json

@@ -881,6 +881,8 @@
       "editToggleOff": "وضع التعديل معطّل",
       "saveToggle": "حفظ",
       "saveToggleAria": "إنهاء التعديل وحفظ التغييرات",
+      "saveToggleOn": "وضع التعديل مفعّل — انقر للحفظ والخروج",
+      "saveToggleOff": "وضع التعديل معطّل — انقر للبدء بالتعديل",
       "bulkSelectRow": "تحديد الاجتماع",
       "bulkSelectAll": "تحديد الكل",
       "bulkSelectionCount": "محدد: {{n}} من {{total}}",

artifacts/tx-os/src/locales/en.json

@@ -834,6 +834,8 @@
       "editToggleOff": "Edit mode off",
       "saveToggle": "Save",
       "saveToggleAria": "Finish editing and save changes",
+      "saveToggleOn": "Edit mode on — click to save and exit",
+      "saveToggleOff": "Edit mode off — click to start editing",
       "bulkSelectRow": "Select meeting",
       "bulkSelectAll": "Select all",
       "bulkSelectionCount": "Selected: {{n}} of {{total}}",

artifacts/tx-os/src/pages/executive-meetings.tsx

@@ -1505,8 +1505,8 @@ function ScheduleSection({
               }
               title={
                 editMode
-                  ? t("executiveMeetings.schedule.editToggleOn")
-                  : t("executiveMeetings.schedule.editToggleOff")
+                  ? t("executiveMeetings.schedule.saveToggleOn")
+                  : t("executiveMeetings.schedule.saveToggleOff")
               }
               data-testid="em-edit-mode-toggle"
               className={