feat: add receipts to the payment service

apps/web/src/routes/dashboard.ts

@@ -305,6 +305,30 @@ export const dashboard = new Elysia()
     return html("checkout", { nav: "settings", account: acc, payApi, invoiceId: params.id, coins, invoice });
   })
 
+  // Receipt (proxy to pay service, serves HTML directly)
+  .get("/dashboard/checkout/:id/receipt", async ({ cookie, headers, params, set }) => {
+    const resolved = await getAccountId(cookie, headers);
+    if (!resolved?.accountId) return redirect("/dashboard");
+
+    const payApi = process.env.PAY_API || "https://pay.pingql.com";
+    const key = cookie?.pingql_key?.value;
+    try {
+      const res = await fetch(`${payApi}/checkout/${params.id}/receipt`, {
+        headers: { "Authorization": `Bearer ${key}` },
+      });
+      if (!res.ok) {
+        const data = await res.json().catch(() => ({}));
+        set.status = res.status;
+        return data.error || "Receipt not available";
+      }
+      set.headers["content-type"] = "text/html; charset=utf-8";
+      return await res.text();
+    } catch {
+      set.status = 500;
+      return "Could not load receipt";
+    }
+  })
+
   // Create checkout via form POST (no-JS)
   .post("/dashboard/checkout", async ({ cookie, headers, body }) => {
     const resolved = await getAccountId(cookie, headers);