feat: in-app support form with email + Gitea issue integration (v0.49.0)

Users can now report bugs, suggestions, or questions from a new /support
page. Each submission sends a confirmation email and, when GITEA_URL/
GITEA_TOKEN/GITEA_REPO are configured in admin Settings, opens a labeled
issue on that repo automatically (best-effort — failure doesn't block the
ticket). Admins get a Support section to triage status and retry failed
Gitea issue creation.

New support_tickets table, gitea.ts client, site-settings entries for the
three new secrets, and OpenAPI docs for the two user-facing endpoints.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/web/app/api/v1/admin/support/route.ts

@@ -0,0 +1,29 @@
+import { NextResponse } from "next/server";
+import { db, users, supportTickets, eq, desc } from "@epicure/db";
+import { requireAdmin } from "@/lib/api-auth";
+
+export async function GET() {
+  const { response } = await requireAdmin();
+  if (response) return response;
+
+  const rows = await db
+    .select({
+      id: supportTickets.id,
+      userId: supportTickets.userId,
+      userEmail: users.email,
+      username: users.username,
+      type: supportTickets.type,
+      title: supportTickets.title,
+      description: supportTickets.description,
+      status: supportTickets.status,
+      giteaIssueUrl: supportTickets.giteaIssueUrl,
+      giteaError: supportTickets.giteaError,
+      createdAt: supportTickets.createdAt,
+      updatedAt: supportTickets.updatedAt,
+    })
+    .from(supportTickets)
+    .innerJoin(users, eq(supportTickets.userId, users.id))
+    .orderBy(desc(supportTickets.createdAt));
+
+  return NextResponse.json(rows);
+}