Task #649: complete Public Relations & Protocol module (fix 8 review gaps)

Addresses the 8 spec gaps that blocked prior completion, all additive and
scoped to the protocol_* module / /protocol routes. executive-meetings untouched.

Backend (api-server/routes/protocol.ts, lib/db schema, seed):
- External meetings create as "pending" (status dropped from create schema);
  added approve + reject endpoints with state-conditional WHERE status='pending'
  and 409 on contention; patch status enum restricted to completed/cancelled.
- Added approvedBy/approvedAt/rejectionReason columns + status index; default
  status now "pending".
- Booking reject and gift-issue reject made state-conditional (409 on 0 rows).
- Dashboard: roomsAvailableNow (NOT EXISTS), giftsIssuedThisMonth/Qty;
  upcomingExternal filtered to future pending|approved.
- Reports: added externalMeetings summary counts by status.
- Seed: room names corrected (AR + EN).

Frontend (tx-os/pages/protocol.tsx, App.tsx, locales):
- URL-synced tabs under /protocol/:tab (slug<->tab maps).
- Dedicated Rooms tab (moved out of Gifts); RoomDialog isActive toggle.
- External approve/reject buttons + rejectionReason display; ExternalDialog
  create omits status, edit limited to completed/cancelled.
- Dashboard cards clickable to navigate; reports external section.
- Bookings list/calendar (grouped-by-day) view toggle.
- New i18n keys in ar.json + en.json.

Verification: tx-os + protocol.ts typecheck clean; drizzle push + re-seed done;
both workflows restarted; /api/protocol/me returns 401 unauth; architect
re-review approved. Pre-existing typecheck errors in executive-meetings.ts and
push.ts are unrelated and were not touched.

Note: had to rebuild lib/db declarations (tsc --build --force) so api-server
project references picked up the new schema columns.

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

@@ -1672,7 +1672,8 @@
       "gifts": "الهدايا والدروع",
       "issues": "طلبات الصرف",
       "reports": "التقارير",
-      "audit": "سجل النشاط"
+      "audit": "سجل النشاط",
+      "rooms": "القاعات"
     },
     "status": {
       "pending": "قيد الانتظار",
@@ -1702,7 +1703,9 @@
       "pendingBookings": "حجوزات بانتظار الاعتماد",
       "upcomingExternal": "لقاءات خارجية قادمة",
       "giftStock": "إجمالي مخزون الهدايا",
-      "pendingIssues": "طلبات صرف معلّقة"
+      "pendingIssues": "طلبات صرف معلّقة",
+      "roomsAvailableNow": "القاعات المتاحة الآن",
+      "giftsIssuedThisMonth": "الدروع المصروفة هذا الشهر"
     },
     "bookings": {
       "new": "حجز جديد",
@@ -1712,7 +1715,9 @@
       "roomLabel": "القاعة",
       "titleLabel": "عنوان الحجز",
       "startsAt": "من",
-      "endsAt": "إلى"
+      "endsAt": "إلى",
+      "viewList": "قائمة",
+      "viewCalendar": "تقويم"
     },
     "external": {
       "new": "لقاء جديد",
@@ -1740,7 +1745,10 @@
       "nameAr": "الاسم (عربي)",
       "nameEn": "الاسم (إنجليزي)",
       "capacity": "السعة",
-      "location": "الموقع"
+      "location": "الموقع",
+      "active": "مفعّلة",
+      "isActive": "مفعّلة",
+      "empty": "لا توجد قاعات."
     },
     "issues": {
       "new": "طلب صرف",
@@ -1759,7 +1767,8 @@
       "requests": "الطلبات",
       "issued": "المصروفة",
       "issuedQty": "الكمية المصروفة",
-      "empty": "لا توجد بيانات."
+      "empty": "لا توجد بيانات.",
+      "byExternal": "اللقاءات الخارجية حسب الحالة"
     },
     "audit": {
       "empty": "لا يوجد نشاط."