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/en.json

@@ -1545,7 +1545,8 @@
       "gifts": "Gifts & Shields",
       "issues": "Issuance Requests",
       "reports": "Reports",
-      "audit": "Activity Log"
+      "audit": "Activity Log",
+      "rooms": "Rooms"
     },
     "status": {
       "pending": "Pending",
@@ -1575,7 +1576,9 @@
       "pendingBookings": "Bookings awaiting approval",
       "upcomingExternal": "Upcoming external meetings",
       "giftStock": "Total gift stock",
-      "pendingIssues": "Pending issuance requests"
+      "pendingIssues": "Pending issuance requests",
+      "roomsAvailableNow": "Rooms available now",
+      "giftsIssuedThisMonth": "Gifts issued this month"
     },
     "bookings": {
       "new": "New booking",
@@ -1585,7 +1588,9 @@
       "roomLabel": "Room",
       "titleLabel": "Booking title",
       "startsAt": "From",
-      "endsAt": "To"
+      "endsAt": "To",
+      "viewList": "List",
+      "viewCalendar": "Calendar"
     },
     "external": {
       "new": "New meeting",
@@ -1613,7 +1618,10 @@
       "nameAr": "Name (Arabic)",
       "nameEn": "Name (English)",
       "capacity": "Capacity",
-      "location": "Location"
+      "location": "Location",
+      "active": "Active",
+      "isActive": "Active",
+      "empty": "No rooms."
     },
     "issues": {
       "new": "Issuance request",
@@ -1632,7 +1640,8 @@
       "requests": "Requests",
       "issued": "Issued",
       "issuedQty": "Issued qty",
-      "empty": "No data."
+      "empty": "No data.",
+      "byExternal": "External meetings by status"
     },
     "audit": {
       "empty": "No activity yet."