feat: Social page — aggregated post queues + X/video history (#345)

* feat(api): x/video post history endpoints

Approved or rejected drafts vanished from both queues permanently --
the listers exclude terminal statuses and no history surface existed,
so a posted tweet or video was only findable in the raw task list.
GET /x/posts/history and GET /video/posts/history (CEO-gated, bounded)
return acted-on drafts newest-first with the posted platform ids and
reject reasons from the draft markers. Route tests assert by identity,
not emptiness: approve/reject commits the whole session, so prior
tests' rows legitimately persist in the shared test DB.

* feat(panel): Social page aggregating post queues and history

New dashboard page composing the X and video post queues with one
unified history section beneath them -- both platforms interleaved
newest-first, kind and outcome badges, posted X ids linking to the
live tweet, reject reasons shown. The command center's two full queue
cards become a compact pending-counts card linking to the page, so the
queues have one home instead of duplicated surfaces.

---------

Co-authored-by: Renn F <rennf93@users.noreply.github.com>

panel/src/components/dashboard/command-center.tsx

@@ -16,8 +16,7 @@ import { CeoApprovalQueue } from "./ceo-approval-queue";
 import { PrReviewQueue } from "./pr-review-queue";
 import { ReleaseProposalCard } from "./release-proposal-card";
 import { PlaybookReviewQueue } from "./playbook-review-queue";
-import { XPostQueue } from "./x-post-queue";
-import { VideoPostQueue } from "./video-post-queue";
+import { SocialSummaryCard } from "./social-summary-card";
 import { RoadmapReviewQueue } from "./roadmap-review-queue";
 import { StrategySignalsPanel } from "./strategy-signals-panel";
 import type { Activity } from "./activity-item";
@@ -121,14 +120,10 @@ export function CommandCenter() {
         <PlaybookReviewQueue />
       </div>
 
-      {/* X post/reply queue (hidden when no drafts) */}
+      {/* Social (X + video) summary — the full queues + unified history live
+          on /social, avoiding a duplicated surface here. */}
       <div className="order-4 md:order-none">
-        <XPostQueue />
-      </div>
-
-      {/* Video post queue (always visible — carries the on-demand request action) */}
-      <div className="order-4 md:order-none">
-        <VideoPostQueue />
+        <SocialSummaryCard />
       </div>
 
       {/* Board roadmap queue (hidden when no cycle authored) */}