feat: add a Keep it free sponsor button to the top nav (#427)

Adds a prominent Keep it free sponsor button to the top nav, linking to https://github.com/sponsors/snapotter-hq. Solid orange pill on desktop (left of the avatar), orange heart icon on mobile. Opens in a new tab with rel=noopener noreferrer, so no referrer or user data leaks, and it adds no passive network activity (offline-mode compatible). Fires an opt-in, property-less sponsor_clicked analytics event. Adds sidebar.sponsor and a11y.sponsorLink across all 21 locales.

Claude-Session: https://claude.ai/code/session_01DnYLLA5z4Uf1GDeEPENVgr

apps/web/src/components/layout/top-nav.tsx

@@ -1,8 +1,10 @@
+import { ANALYTICS_EVENTS } from "@snapotter/shared";
 import {
   ChevronLeft,
   ChevronRight,
   FolderOpen,
   Globe,
+  Heart,
   HelpCircle,
   LayoutGrid,
   MessageSquare,
@@ -128,6 +130,8 @@ export function TopNav({
           </button>
         )}
 
+        <SponsorButton isDark={isDark} compact />
+
         <button
           type="button"
           onClick={onHelpClick}
@@ -280,12 +284,58 @@ export function TopNav({
           <HelpCircle className="h-4 w-4" />
         </button>
 
+        <SponsorButton isDark={isDark} />
+
         {!isMobile && <AvatarDropdown onSettingsClick={onSettingsClick} variant={variant} />}
       </div>
     </header>
   );
 }
 
+const SPONSOR_URL = "https://github.com/sponsors/snapotter-hq";
+
+function SponsorButton({ isDark, compact = false }: { isDark: boolean; compact?: boolean }) {
+  const { t } = useTranslation();
+
+  const handleClick = () => {
+    import("@/lib/analytics").then(({ track }) => {
+      track(ANALYTICS_EVENTS.SPONSOR_CLICKED);
+    });
+  };
+
+  if (compact) {
+    return (
+      <a
+        href={SPONSOR_URL}
+        target="_blank"
+        rel="noopener noreferrer"
+        onClick={handleClick}
+        aria-label={t.a11y.sponsorLink}
+        title={t.a11y.sponsorLink}
+        className={cn(
+          "p-1.5 rounded-md transition-colors text-primary",
+          isDark ? "hover:bg-[#333]" : "hover:bg-muted",
+        )}
+      >
+        <Heart className="h-4 w-4 fill-current" />
+      </a>
+    );
+  }
+
+  return (
+    <a
+      href={SPONSOR_URL}
+      target="_blank"
+      rel="noopener noreferrer"
+      onClick={handleClick}
+      className="ms-1 inline-flex items-center gap-1.5 rounded-md bg-primary px-3 py-1.5 text-sm font-medium text-[#1a1814] transition-opacity hover:opacity-90 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-primary focus-visible:ring-offset-1"
+    >
+      <Heart className="h-3.5 w-3.5 fill-current" aria-hidden="true" />
+      {t.sidebar.sponsor}
+    </a>
+  );
+}
+
 function ThemeToggle({ isDark }: { isDark: boolean }) {
   const { resolvedTheme, toggleTheme } = useTheme();
   return (

packages/shared/src/analytics/events.ts

@@ -12,6 +12,7 @@ export const ANALYTICS_EVENTS = {
   AI_BUNDLE_PROMPTED: "ai_bundle_prompted",
   BATCH_PROCESSED: "batch_processed",
   FEEDBACK_SUBMITTED: "feedback_submitted",
+  SPONSOR_CLICKED: "sponsor_clicked",
 } as const;
 
 export type AnalyticsEvent = (typeof ANALYTICS_EVENTS)[keyof typeof ANALYTICS_EVENTS];

packages/shared/src/i18n/ar.ts

@@ -3819,6 +3819,7 @@ export const ar: TranslationKeys = {
     connectionError: "خطأ في الاتصال",
   },
   sidebar: {
+    sponsor: "أبقِه مجانيًا",
     tools: "الأدوات",
     grid: "شبكة",
     automate: "أتمتة",
@@ -3838,6 +3839,7 @@ export const ar: TranslationKeys = {
     mobileNavSettings: "الإعدادات",
   },
   a11y: {
+    sponsorLink: "ادعم SnapOtter على GitHub Sponsors",
     skipToContent: "تخطي إلى المحتوى الرئيسي",
     openSidebar: "فتح الشريط الجانبي",
     closeSidebar: "إغلاق الشريط الجانبي",

packages/shared/src/i18n/de.ts

@@ -3866,6 +3866,7 @@ export const de: TranslationKeys = {
     connectionError: "Verbindungsfehler",
   },
   sidebar: {
+    sponsor: "Kostenlos halten",
     tools: "Werkzeuge",
     grid: "Raster",
     automate: "Automatisieren",
@@ -3885,6 +3886,7 @@ export const de: TranslationKeys = {
     mobileNavSettings: "Einstellungen",
   },
   a11y: {
+    sponsorLink: "SnapOtter auf GitHub Sponsors unterstützen",
     skipToContent: "Zum Hauptinhalt springen",
     openSidebar: "Seitenleiste öffnen",
     closeSidebar: "Seitenleiste schließen",

packages/shared/src/i18n/en.ts

@@ -3795,6 +3795,7 @@ export const en = {
     automate: "Automate",
     editor: "Editor",
     files: "Files",
+    sponsor: "Keep it free",
     help: "Help",
     settings: "Settings",
   },
@@ -3870,6 +3871,7 @@ export const en = {
     helpDialog: "Help",
     navigationMenu: "Navigation",
     homeLink: "SnapOtter home",
+    sponsorLink: "Support SnapOtter on GitHub Sponsors",
   },
   pipelineTemplates: {
     "web-optimize": {

packages/shared/src/i18n/es.ts

@@ -3844,6 +3844,7 @@ export const es: TranslationKeys = {
     connectionError: "Error de conexión",
   },
   sidebar: {
+    sponsor: "Mantenlo gratis",
     tools: "Herramientas",
     grid: "Cuadrícula",
     automate: "Automatizar",
@@ -3863,6 +3864,7 @@ export const es: TranslationKeys = {
     mobileNavSettings: "Configuración",
   },
   a11y: {
+    sponsorLink: "Apoya a SnapOtter en GitHub Sponsors",
     skipToContent: "Ir al contenido principal",
     openSidebar: "Abrir barra lateral",
     closeSidebar: "Cerrar barra lateral",

packages/shared/src/i18n/fr.ts

@@ -3868,6 +3868,7 @@ export const fr: TranslationKeys = {
     connectionError: "Erreur de connexion",
   },
   sidebar: {
+    sponsor: "Gardons-le gratuit",
     tools: "Outils",
     grid: "Grille",
     automate: "Automatiser",
@@ -3887,6 +3888,7 @@ export const fr: TranslationKeys = {
     mobileNavSettings: "Paramètres",
   },
   a11y: {
+    sponsorLink: "Soutenir SnapOtter sur GitHub Sponsors",
     skipToContent: "Aller au contenu principal",
     openSidebar: "Ouvrir le panneau latéral",
     closeSidebar: "Fermer le panneau latéral",

packages/shared/src/i18n/hi.ts

@@ -3649,6 +3649,7 @@ export const hi: TranslationKeys = {
     connectionError: "कनेक्शन त्रुटि",
   },
   sidebar: {
+    sponsor: "इसे मुफ़्त रखें",
     tools: "टूल्स",
     grid: "ग्रिड",
     automate: "ऑटोमेट",
@@ -3668,6 +3669,7 @@ export const hi: TranslationKeys = {
     mobileNavSettings: "सेटिंग्स",
   },
   a11y: {
+    sponsorLink: "GitHub Sponsors पर SnapOtter का समर्थन करें",
     skipToContent: "मुख्य सामग्री पर जाएं",
     openSidebar: "साइडबार खोलें",
     closeSidebar: "साइडबार बंद करें",

packages/shared/src/i18n/id.ts

@@ -3844,6 +3844,7 @@ export const id: TranslationKeys = {
     connectionError: "Kesalahan koneksi",
   },
   sidebar: {
+    sponsor: "Jaga tetap gratis",
     tools: "Alat",
     grid: "Kisi",
     automate: "Otomasi",
@@ -3863,6 +3864,7 @@ export const id: TranslationKeys = {
     mobileNavSettings: "Pengaturan",
   },
   a11y: {
+    sponsorLink: "Dukung SnapOtter di GitHub Sponsors",
     skipToContent: "Lewati ke konten utama",
     openSidebar: "Buka bilah sisi",
     closeSidebar: "Tutup bilah sisi",

packages/shared/src/i18n/it.ts

@@ -3859,6 +3859,7 @@ export const it: TranslationKeys = {
     connectionError: "Errore di connessione",
   },
   sidebar: {
+    sponsor: "Mantienilo gratis",
     tools: "Strumenti",
     grid: "Griglia",
     automate: "Automatizza",
@@ -3878,6 +3879,7 @@ export const it: TranslationKeys = {
     mobileNavSettings: "Impostazioni",
   },
   a11y: {
+    sponsorLink: "Sostieni SnapOtter su GitHub Sponsors",
     skipToContent: "Vai al contenuto principale",
     openSidebar: "Apri barra laterale",
     closeSidebar: "Chiudi barra laterale",

packages/shared/src/i18n/ja.ts

@@ -3795,6 +3795,7 @@ export const ja: TranslationKeys = {
     connectionError: "接続エラー",
   },
   sidebar: {
+    sponsor: "無料を守る",
     tools: "ツール",
     grid: "グリッド",
     automate: "自動化",
@@ -3814,6 +3815,7 @@ export const ja: TranslationKeys = {
     mobileNavSettings: "設定",
   },
   a11y: {
+    sponsorLink: "GitHub Sponsors で SnapOtter を支援する",
     skipToContent: "メインコンテンツへスキップ",
     openSidebar: "サイドバーを開く",
     closeSidebar: "サイドバーを閉じる",

packages/shared/src/i18n/ko.ts

@@ -3776,6 +3776,7 @@ export const ko: TranslationKeys = {
     connectionError: "연결 오류",
   },
   sidebar: {
+    sponsor: "무료로 유지하기",
     tools: "도구",
     grid: "그리드",
     automate: "자동화",
@@ -3795,6 +3796,7 @@ export const ko: TranslationKeys = {
     mobileNavSettings: "설정",
   },
   a11y: {
+    sponsorLink: "GitHub Sponsors에서 SnapOtter 후원하기",
     skipToContent: "본문으로 건너뛰기",
     openSidebar: "사이드바 열기",
     closeSidebar: "사이드바 닫기",

packages/shared/src/i18n/nl.ts

@@ -3853,6 +3853,7 @@ export const nl: TranslationKeys = {
     connectionError: "Verbindingsfout",
   },
   sidebar: {
+    sponsor: "Houd het gratis",
     tools: "Tools",
     grid: "Raster",
     automate: "Automatiseren",
@@ -3872,6 +3873,7 @@ export const nl: TranslationKeys = {
     mobileNavSettings: "Instellingen",
   },
   a11y: {
+    sponsorLink: "Steun SnapOtter op GitHub Sponsors",
     skipToContent: "Ga naar hoofdinhoud",
     openSidebar: "Zijbalk openen",
     closeSidebar: "Zijbalk sluiten",

packages/shared/src/i18n/pl.ts

@@ -3859,6 +3859,7 @@ export const pl: TranslationKeys = {
     connectionError: "Błąd połączenia",
   },
   sidebar: {
+    sponsor: "Zachowaj darmowość",
     tools: "Narzędzia",
     grid: "Siatka",
     automate: "Automatyzacja",
@@ -3878,6 +3879,7 @@ export const pl: TranslationKeys = {
     mobileNavSettings: "Ustawienia",
   },
   a11y: {
+    sponsorLink: "Wesprzyj SnapOtter na GitHub Sponsors",
     skipToContent: "Przejdź do treści",
     openSidebar: "Otwórz panel boczny",
     closeSidebar: "Zamknij panel boczny",

packages/shared/src/i18n/pt-BR.ts

@@ -3851,6 +3851,7 @@ export const ptBR: TranslationKeys = {
     connectionError: "Erro de conexão",
   },
   sidebar: {
+    sponsor: "Mantenha gratuito",
     tools: "Ferramentas",
     grid: "Grade",
     automate: "Automatizar",
@@ -3870,6 +3871,7 @@ export const ptBR: TranslationKeys = {
     mobileNavSettings: "Configurações",
   },
   a11y: {
+    sponsorLink: "Apoie o SnapOtter no GitHub Sponsors",
     skipToContent: "Pular para o conteúdo principal",
     openSidebar: "Abrir barra lateral",
     closeSidebar: "Fechar barra lateral",

packages/shared/src/i18n/ru.ts

@@ -3847,6 +3847,7 @@ export const ru: TranslationKeys = {
     connectionError: "Ошибка подключения",
   },
   sidebar: {
+    sponsor: "Пусть будет бесплатным",
     tools: "Инструменты",
     grid: "Сетка",
     automate: "Автоматизация",
@@ -3866,6 +3867,7 @@ export const ru: TranslationKeys = {
     mobileNavSettings: "Настройки",
   },
   a11y: {
+    sponsorLink: "Поддержать SnapOtter на GitHub Sponsors",
     skipToContent: "Перейти к основному содержимому",
     openSidebar: "Открыть боковую панель",
     closeSidebar: "Закрыть боковую панель",

packages/shared/src/i18n/sv.ts

@@ -3840,6 +3840,7 @@ export const sv: TranslationKeys = {
     connectionError: "Anslutningsfel",
   },
   sidebar: {
+    sponsor: "Håll det gratis",
     tools: "Verktyg",
     grid: "Rutnät",
     automate: "Automatisera",
@@ -3859,6 +3860,7 @@ export const sv: TranslationKeys = {
     mobileNavSettings: "Inställningar",
   },
   a11y: {
+    sponsorLink: "Stöd SnapOtter på GitHub Sponsors",
     skipToContent: "Hoppa till huvudinnehåll",
     openSidebar: "Öppna sidopanel",
     closeSidebar: "Stäng sidopanel",

packages/shared/src/i18n/th.ts

@@ -3799,6 +3799,7 @@ export const th: TranslationKeys = {
     connectionError: "ข้อผิดพลาดในการเชื่อมต่อ",
   },
   sidebar: {
+    sponsor: "ให้ใช้ฟรีต่อไป",
     tools: "เครื่องมือ",
     grid: "กริด",
     automate: "อัตโนมัติ",
@@ -3818,6 +3819,7 @@ export const th: TranslationKeys = {
     mobileNavSettings: "ตั้งค่า",
   },
   a11y: {
+    sponsorLink: "สนับสนุน SnapOtter บน GitHub Sponsors",
     skipToContent: "ข้ามไปยังเนื้อหาหลัก",
     openSidebar: "เปิดแถบด้านข้าง",
     closeSidebar: "ปิดแถบด้านข้าง",

packages/shared/src/i18n/tr.ts

@@ -3851,6 +3851,7 @@ export const tr: TranslationKeys = {
     connectionError: "Bağlantı hatası",
   },
   sidebar: {
+    sponsor: "Ücretsiz kalsın",
     tools: "Araçlar",
     grid: "Izgara",
     automate: "Otomatikleştir",
@@ -3870,6 +3871,7 @@ export const tr: TranslationKeys = {
     mobileNavSettings: "Ayarlar",
   },
   a11y: {
+    sponsorLink: "SnapOtter'ı GitHub Sponsors'ta destekleyin",
     skipToContent: "Ana içeriğe geç",
     openSidebar: "Kenar çubuğunu aç",
     closeSidebar: "Kenar çubuğunu kapat",

packages/shared/src/i18n/uk.ts

@@ -3848,6 +3848,7 @@ export const uk: TranslationKeys = {
     connectionError: "Помилка з'єднання",
   },
   sidebar: {
+    sponsor: "Нехай буде безкоштовним",
     tools: "Інструменти",
     grid: "Сітка",
     automate: "Автоматизація",
@@ -3867,6 +3868,7 @@ export const uk: TranslationKeys = {
     mobileNavSettings: "Налаштування",
   },
   a11y: {
+    sponsorLink: "Підтримати SnapOtter на GitHub Sponsors",
     skipToContent: "Перейти до основного вмісту",
     openSidebar: "Відкрити бічну панель",
     closeSidebar: "Закрити бічну панель",

packages/shared/src/i18n/vi.ts

@@ -3840,6 +3840,7 @@ export const vi: TranslationKeys = {
     connectionError: "Lỗi kết nối",
   },
   sidebar: {
+    sponsor: "Giữ nó miễn phí",
     tools: "Công cụ",
     grid: "Lưới",
     automate: "Tự động hóa",
@@ -3859,6 +3860,7 @@ export const vi: TranslationKeys = {
     mobileNavSettings: "Cài đặt",
   },
   a11y: {
+    sponsorLink: "Ủng hộ SnapOtter trên GitHub Sponsors",
     skipToContent: "Chuyển đến nội dung chính",
     openSidebar: "Mở thanh bên",
     closeSidebar: "Đóng thanh bên",

packages/shared/src/i18n/zh-CN.ts

@@ -3583,6 +3583,7 @@ export const zhCN: TranslationKeys = {
     connectionError: "连接错误",
   },
   sidebar: {
+    sponsor: "保持免费",
     tools: "工具",
     grid: "网格",
     automate: "自动化",
@@ -3602,6 +3603,7 @@ export const zhCN: TranslationKeys = {
     mobileNavSettings: "设置",
   },
   a11y: {
+    sponsorLink: "在 GitHub Sponsors 上支持 SnapOtter",
     skipToContent: "跳到主要内容",
     openSidebar: "打开侧边栏",
     closeSidebar: "关闭侧边栏",

packages/shared/src/i18n/zh-TW.ts

@@ -3583,6 +3583,7 @@ export const zhTW: TranslationKeys = {
     connectionError: "連線錯誤",
   },
   sidebar: {
+    sponsor: "保持免費",
     tools: "工具",
     grid: "格線",
     automate: "自動化",
@@ -3602,6 +3603,7 @@ export const zhTW: TranslationKeys = {
     mobileNavSettings: "設定",
   },
   a11y: {
+    sponsorLink: "在 GitHub Sponsors 上支持 SnapOtter",
     skipToContent: "跳至主要內容",
     openSidebar: "開啟側邊欄",
     closeSidebar: "關閉側邊欄",

tests/e2e/sponsor-button.spec.ts

@@ -0,0 +1,19 @@
+import { expect, test } from "./helpers";
+
+const SPONSOR_URL = "https://github.com/sponsors/snapotter-hq";
+
+test.describe("Sponsor button", () => {
+  // Pin a desktop viewport so the full pill (with visible text) renders,
+  // not the mobile icon-only form.
+  test.use({ viewport: { width: 1280, height: 720 } });
+
+  test("top nav links to GitHub Sponsors with safe rel", async ({ page }) => {
+    await page.goto("/");
+
+    const link = page.locator(`a[href="${SPONSOR_URL}"]`);
+    await expect(link).toBeVisible();
+    await expect(link).toHaveAttribute("target", "_blank");
+    await expect(link).toHaveAttribute("rel", "noopener noreferrer");
+    await expect(link).toContainText(/keep it free/i);
+  });
+});

tests/unit/shared/analytics-events.test.ts

@@ -2,8 +2,8 @@ import { ANALYTICS_EVENTS } from "@snapotter/shared";
 import { describe, expect, it } from "vitest";
 
 describe("ANALYTICS_EVENTS", () => {
-  it("has exactly 13 event keys", () => {
-    expect(Object.keys(ANALYTICS_EVENTS)).toHaveLength(13);
+  it("has exactly 14 event keys", () => {
+    expect(Object.keys(ANALYTICS_EVENTS)).toHaveLength(14);
   });
 
   it("contains the expected keys", () => {
@@ -20,6 +20,7 @@ describe("ANALYTICS_EVENTS", () => {
     expect(ANALYTICS_EVENTS).toHaveProperty("AI_BUNDLE_PROMPTED");
     expect(ANALYTICS_EVENTS).toHaveProperty("BATCH_PROCESSED");
     expect(ANALYTICS_EVENTS).toHaveProperty("FEEDBACK_SUBMITTED");
+    expect(ANALYTICS_EVENTS).toHaveProperty("SPONSOR_CLICKED");
   });
 
   it("all event values are strings", () => {