feat(panel): surface the PR-review gate on the kanban boards

The awaiting_pr_review status had no board home, so a task sitting in the
in-path PR-review gate was invisible on every kanban. Add a "PR Review"
column to the PM board (between In Docs and PM Review, matching the
lifecycle) and a dedicated "PR Review" tab — Awaiting Review -> Passed ->
Changes Requested — mirroring the QA board.

panel/src/app/(dashboard)/kanban/page.tsx

@@ -2,12 +2,12 @@
 
 import { Suspense } from "react";
 import { useSearchParams, useRouter } from "next/navigation";
-import { DevKanban, QaKanban, PmKanban } from "@/components/kanban";
+import { DevKanban, QaKanban, PrReviewKanban, PmKanban } from "@/components/kanban";
 import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
 import { Skeleton } from "@/components/ui/skeleton";
-import { Code, TestTube, ClipboardList } from "lucide-react";
+import { Code, TestTube, GitPullRequest, ClipboardList } from "lucide-react";
 
-type KanbanView = "dev" | "qa" | "pm";
+type KanbanView = "dev" | "qa" | "pr-review" | "pm";
 
 function KanbanPageContent() {
   const router = useRouter();
@@ -36,6 +36,10 @@ function KanbanPageContent() {
             <TestTube className="h-4 w-4" />
             QA
           </TabsTrigger>
+          <TabsTrigger value="pr-review" className="gap-2">
+            <GitPullRequest className="h-4 w-4" />
+            PR Review
+          </TabsTrigger>
           <TabsTrigger value="pm" className="gap-2">
             <ClipboardList className="h-4 w-4" />
             PM
@@ -48,6 +52,9 @@ function KanbanPageContent() {
         <TabsContent value="qa" className="mt-6">
           <QaKanban />
         </TabsContent>
+        <TabsContent value="pr-review" className="mt-6">
+          <PrReviewKanban />
+        </TabsContent>
         <TabsContent value="pm" className="mt-6">
           <PmKanban />
         </TabsContent>

panel/src/components/kanban/index.ts

@@ -6,6 +6,7 @@ export { KanbanCard } from "./core/kanban-card";
 // Views
 export { DevKanban } from "./views/dev-kanban";
 export { QaKanban } from "./views/qa-kanban";
+export { PrReviewKanban } from "./views/pr-review-kanban";
 export { PmKanban } from "./views/pm-kanban";
 
 // Shared

panel/src/components/kanban/views/pm-kanban.tsx

@@ -20,6 +20,7 @@ const PM_COLUMNS = [
   { id: "qa", status: TaskStatus.AWAITING_QA, title: "In QA", color: "bg-yellow-50 dark:bg-yellow-950" },
   { id: "needs-revision", status: TaskStatus.NEEDS_REVISION, title: "Needs Revision", color: "bg-rose-50 dark:bg-rose-950" },
   { id: "docs", status: TaskStatus.AWAITING_DOCUMENTATION, title: "In Docs", color: "bg-purple-50 dark:bg-purple-950" },
+  { id: "pr-review", status: TaskStatus.AWAITING_PR_REVIEW, title: "PR Review", color: "bg-teal-50 dark:bg-teal-950" },
   { id: "pm-review", status: TaskStatus.AWAITING_PM_REVIEW, title: "PM Review", color: "bg-orange-50 dark:bg-orange-950" },
   { id: "ceo-approval", status: TaskStatus.AWAITING_CEO_APPROVAL, title: "CEO Approval", color: "bg-indigo-50 dark:bg-indigo-950" },
   { id: "done", status: TaskStatus.COMPLETED, title: "Done", color: "bg-green-50 dark:bg-green-950" },

panel/src/components/kanban/views/pr-review-kanban.tsx

@@ -0,0 +1,32 @@
+"use client";
+
+import { useState } from "react";
+import { TaskStatus, Team } from "@/types";
+import { KanbanBoard } from "../core/kanban-board";
+
+// The in-path PR-review gate: a reviewer checks each assembled cell->root /
+// root->master PR before the PM merges. A card sits in "Awaiting Review" until
+// a reviewer pr_passes it on to PM Review or pr_fails it back for changes.
+const PR_REVIEW_COLUMNS = [
+  { id: "awaiting", status: TaskStatus.AWAITING_PR_REVIEW, title: "Awaiting Review", color: "bg-teal-100 dark:bg-teal-900" },
+  { id: "passed", status: TaskStatus.AWAITING_PM_REVIEW, title: "Passed", color: "bg-green-50 dark:bg-green-950" },
+  { id: "changes", status: TaskStatus.NEEDS_REVISION, title: "Changes Requested", color: "bg-red-50 dark:bg-red-950" },
+];
+
+interface PrReviewKanbanProps {
+  initialTeam?: Team;
+}
+
+export function PrReviewKanban({ initialTeam }: PrReviewKanbanProps) {
+  const [team, setTeam] = useState<Team | undefined>(initialTeam);
+
+  return (
+    <KanbanBoard
+      title="PR Review Kanban"
+      description="In-path PR-review gate for assembled PRs"
+      columns={PR_REVIEW_COLUMNS}
+      teamFilter={team}
+      onTeamChange={(t) => setTeam(t === "all" ? undefined : t)}
+    />
+  );
+}