feat(admin/ui): enterprise inquiries pipeline

Add /enterprise page wired to /admin/enterprise/inquiries. Sales-style
pipeline: pending → contacted → converted | declined, with an inline
<select> on each row so triage is one click per inquiry rather than a
detail-page round-trip.

Each row shows company, contact, estimated volume, team size, and the
free-form notes from the marketing-site form. Pending is the default
filter so the queue surfaces first; "All" reveals historical decisions.

Added a sidebar entry under Accounts (Briefcase icon) so the inquiry
queue is one click away from the rest of the customer-facing admin.

admin/src/app/dashboard/EnterprisePage.tsx

@@ -0,0 +1,183 @@
+// Sales pipeline for inquiries submitted from the marketing site.
+// Status flow: pending → contacted → converted | declined.
+
+import { useState } from "react";
+import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
+import { toast } from "sonner";
+import { PageHeader } from "@/components/layout/PageHeader";
+import { Badge } from "@/components/ui/badge";
+import { Skeleton } from "@/components/ui/skeleton";
+import {
+    listEnterpriseInquiries,
+    updateEnterpriseInquiry,
+} from "@/lib/api/client/admin/enterprise";
+import type {
+    EnterpriseInquiry,
+    EnterpriseInquiryStatus,
+} from "@/lib/api/models/admin";
+
+const STATUS_TONE: Record<EnterpriseInquiryStatus, string> = {
+    pending: "border-amber-300 text-amber-700 bg-amber-50",
+    contacted: "border-blue-300 text-blue-700 bg-blue-50",
+    converted: "border-emerald-300 text-emerald-700 bg-emerald-50",
+    declined: "border-zinc-300 text-zinc-600 bg-zinc-50",
+};
+
+const STATUSES: EnterpriseInquiryStatus[] = [
+    "pending",
+    "contacted",
+    "converted",
+    "declined",
+];
+
+type StatusFilter = EnterpriseInquiryStatus | "all";
+
+export default function EnterprisePage() {
+    const [status, setStatus] = useState<StatusFilter>("pending");
+    const { data, isLoading, error } = useQuery({
+        queryKey: ["admin", "enterprise", "inquiries", status],
+        queryFn: () => listEnterpriseInquiries(status === "all" ? undefined : status),
+        staleTime: 30_000,
+    });
+
+    const rows = data?.data ?? [];
+
+    return (
+        <div>
+            <PageHeader
+                title="Enterprise inquiries"
+                description="Talk-to-us submissions from the marketing site. Pipeline: pending → contacted → converted or declined."
+            >
+                <StatusToggle value={status} onChange={setStatus} />
+            </PageHeader>
+
+            {isLoading && <Skeleton className="h-32 w-full" />}
+            {error && (
+                <div className="text-sm text-red-600 border border-red-200 bg-red-50 rounded-md p-3">
+                    Failed to load inquiries.
+                </div>
+            )}
+
+            {!isLoading && !error && rows.length === 0 && (
+                <div className="text-sm text-muted-foreground border border-border rounded-md p-4 bg-card">
+                    No inquiries in this status.
+                </div>
+            )}
+
+            {rows.length > 0 && (
+                <div className="border border-border rounded-lg overflow-hidden bg-card">
+                    <table className="w-full text-sm">
+                        <thead className="bg-muted/50 text-muted-foreground text-xs uppercase">
+                            <tr>
+                                <th className="text-left px-3 py-2 font-medium">Company</th>
+                                <th className="text-left px-3 py-2 font-medium">Contact</th>
+                                <th className="text-right px-3 py-2 font-medium">Volume</th>
+                                <th className="text-right px-3 py-2 font-medium">Team</th>
+                                <th className="text-left px-3 py-2 font-medium">Notes</th>
+                                <th className="text-left px-3 py-2 font-medium">Status</th>
+                                <th className="text-left px-3 py-2 font-medium">Received</th>
+                            </tr>
+                        </thead>
+                        <tbody>
+                            {rows.map((i) => (
+                                <InquiryRow key={i.id} inquiry={i} />
+                            ))}
+                        </tbody>
+                    </table>
+                </div>
+            )}
+        </div>
+    );
+}
+
+function InquiryRow({ inquiry }: { inquiry: EnterpriseInquiry }) {
+    const qc = useQueryClient();
+    const mutation = useMutation({
+        mutationFn: (next: EnterpriseInquiryStatus) =>
+            updateEnterpriseInquiry(inquiry.id, { status: next }),
+        onSuccess: () => {
+            toast.success("Inquiry updated");
+            qc.invalidateQueries({ queryKey: ["admin", "enterprise"] });
+        },
+        onError: (err: Error) => toast.error(err.message || "Update failed"),
+    });
+
+    return (
+        <tr className="border-t border-border align-top">
+            <td className="px-3 py-2">
+                <div className="font-medium">{inquiry.company_name}</div>
+            </td>
+            <td className="px-3 py-2 text-xs">
+                <div>{inquiry.contact_name}</div>
+                <div className="text-muted-foreground">{inquiry.contact_email}</div>
+            </td>
+            <td className="px-3 py-2 text-right tabular-nums text-xs">
+                {inquiry.estimated_volume != null
+                    ? inquiry.estimated_volume.toLocaleString()
+                    : "—"}
+            </td>
+            <td className="px-3 py-2 text-right tabular-nums text-xs">
+                {inquiry.team_size != null ? inquiry.team_size : "—"}
+            </td>
+            <td className="px-3 py-2 text-xs max-w-md truncate" title={inquiry.notes}>
+                {inquiry.notes || <span className="text-muted-foreground">—</span>}
+            </td>
+            <td className="px-3 py-2">
+                <select
+                    value={inquiry.status}
+                    onChange={(e) =>
+                        mutation.mutate(e.target.value as EnterpriseInquiryStatus)
+                    }
+                    disabled={mutation.isPending}
+                    className={`text-[10px] px-1.5 py-1 rounded border ${
+                        STATUS_TONE[inquiry.status]
+                    } font-medium`}
+                >
+                    {STATUSES.map((s) => (
+                        <option key={s} value={s}>
+                            {s}
+                        </option>
+                    ))}
+                </select>
+            </td>
+            <td className="px-3 py-2 text-xs text-muted-foreground">
+                {new Date(inquiry.created_at).toLocaleDateString()}
+            </td>
+        </tr>
+    );
+}
+
+function StatusToggle({
+    value,
+    onChange,
+}: {
+    value: StatusFilter;
+    onChange: (v: StatusFilter) => void;
+}) {
+    const options: { value: StatusFilter; label: string }[] = [
+        { value: "pending", label: "Pending" },
+        { value: "contacted", label: "Contacted" },
+        { value: "converted", label: "Converted" },
+        { value: "declined", label: "Declined" },
+        { value: "all", label: "All" },
+    ];
+    return (
+        <div className="inline-flex rounded-md border border-border bg-card p-0.5 text-xs">
+            {options.map((opt) => (
+                <button
+                    key={opt.value}
+                    type="button"
+                    onClick={() => onChange(opt.value)}
+                    className={`px-2 py-1 rounded ${
+                        value === opt.value
+                            ? "bg-[var(--admin-accent)] text-white"
+                            : "text-muted-foreground hover:text-foreground"
+                    }`}
+                >
+                    {opt.label}
+                </button>
+            ))}
+        </div>
+    );
+}
+

admin/src/components/layout/Sidebar.tsx

@@ -7,6 +7,7 @@ import { NavLink } from "react-router-dom";
 import {
     Activity,
     BarChart3,
+    Briefcase,
     Building2,
     Cloud,
     Cog,
@@ -66,6 +67,7 @@ const GROUPS: NavGroup[] = [
             { to: "/users", label: "Users", icon: Users },
             { to: "/organizations", label: "Organizations", icon: Building2 },
             { to: "/plans", label: "Plans & Billing", icon: CreditCard },
+            { to: "/enterprise", label: "Enterprise", icon: Briefcase },
         ],
     },
     {

admin/src/lib/api/client/admin/enterprise.ts

@@ -0,0 +1,41 @@
+// /admin/enterprise/inquiries — sales-pipeline triage.
+
+import { Request } from "@/lib/api/client";
+import type {
+    EnterpriseInquiry,
+    UpdateEnterpriseInquiryRequest,
+} from "@/lib/api/models/admin";
+
+export function listEnterpriseInquiries(
+    status?: string,
+    limit = 50,
+): Promise<{ data: EnterpriseInquiry[] }> {
+    const usp = new URLSearchParams();
+    if (status) usp.set("status", status);
+    usp.set("limit", String(limit));
+    return Request({
+        method: "GET",
+        url: `/admin/enterprise/inquiries?${usp.toString()}`,
+        authorization: true,
+    });
+}
+
+export function getEnterpriseInquiry(id: string): Promise<EnterpriseInquiry> {
+    return Request({
+        method: "GET",
+        url: `/admin/enterprise/inquiries/${id}`,
+        authorization: true,
+    });
+}
+
+export function updateEnterpriseInquiry(
+    id: string,
+    body: UpdateEnterpriseInquiryRequest,
+): Promise<EnterpriseInquiry> {
+    return Request({
+        method: "PATCH",
+        url: `/admin/enterprise/inquiries/${id}`,
+        authorization: true,
+        data: body,
+    });
+}

admin/src/lib/api/models/admin.ts

@@ -323,6 +323,35 @@ export interface ProvisioningJobCreate {
     };
 }
 
+// /admin/enterprise/inquiries — sales pipeline for "talk to us"
+// requests submitted from the marketing site.
+
+export type EnterpriseInquiryStatus =
+    | "pending"
+    | "contacted"
+    | "converted"
+    | "declined";
+
+export interface EnterpriseInquiry {
+    id: string;
+    company_name: string;
+    contact_name: string;
+    contact_email: string;
+    estimated_volume?: number | null;
+    team_size?: number | null;
+    notes: string;
+    status: EnterpriseInquiryStatus;
+    created_at: string;
+    processed_at?: string | null;
+    processed_by?: string | null;
+}
+
+export interface UpdateEnterpriseInquiryRequest {
+    status?: EnterpriseInquiryStatus;
+    assigned_to?: string;
+    notes?: string;
+}
+
 // /admin/campaigns/* — platform-wide campaign admin (force-stop runaway
 // campaigns, inspect engagement counters per campaign).
 

admin/src/main.tsx

@@ -39,6 +39,7 @@ import UsersPage from "@/app/dashboard/UsersPage";
 import UserDetailPage from "@/app/dashboard/UserDetailPage";
 import WarmupPage from "@/app/dashboard/WarmupPage";
 import CampaignsPage from "@/app/dashboard/CampaignsPage";
+import EnterprisePage from "@/app/dashboard/EnterprisePage";
 import {
     AnalyticsPage,
     MailboxesPage,
@@ -91,6 +92,7 @@ const router = createBrowserRouter([
                     { path: "plans", element: <PlansPage /> },
                     { path: "warmup", element: <WarmupPage /> },
                     { path: "campaigns", element: <CampaignsPage /> },
+                    { path: "enterprise", element: <EnterprisePage /> },
                     { path: "analytics", element: <AnalyticsPage /> },
                     { path: "audit", element: <AuditPage /> },
                     {