diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
new file mode 100644
index 0000000..a3dfdee
--- /dev/null
+++ b/.github/copilot-instructions.md
@@ -0,0 +1,60 @@
+# Copilot Instructions
+
+## Architecture Overview
+
+Three-component system for remote-controlling a TV display from a mobile phone:
+
+- **`mobile/`** — Expo React Native app (the "remote control"). Sends commands to the backend.
+- **`tv/`** — Vite + React web app (the TV display). Runs in a browser, polls backend every 5s when fullscreen.
+- **`functions/control/`** — Python serverless function deployed on `shsf-api.reversed.dev`. Acts as state store; persists to `/app/state.json` on the container.
+
+## API / Backend
+
+All communication goes through a single endpoint:
+```
+https://shsf-api.reversed.dev/api/exec/15/1c44d8b5-4065-4a54-b259-748561021329/{route}
+```
+
+Routes (all `POST` except pull routes which are `GET` implicitly via `fetch`):
+- `push_text` — body: `{ title: string }`
+- `push_dismiss_text`
+- `push_image` — body: `{ image_b64: string, caption: string }`; uploads to MinIO, stores public URL
+- `push_dismiss_image`
+- `pull_full` — returns full state `{ text, image_popup }`
+
+Images are stored in MinIO at `content2.reversed.dev`, bucket `tv-control`.
+
+## Adding a New Content Type
+
+1. Add state shape to `DEFAULT_STATE` in `functions/control/main.py`
+2. Add `push_*` / `pull_*` handlers in `main(args)` in the same file
+3. Add a TypeScript interface and `useState` in `tv/src/App.tsx`; render the popup in the fullscreen branch
+4. Add a page in `mobile/src/pages/`
+5. Register it in the `TABS` array in `mobile/App.tsx` with `hideInNav: true` (prevents it appearing in `BottomNav`, navigation is triggered programmatically via `navigate()`)
+
+## Mobile App Conventions
+
+- Uses a **custom in-memory router** (`mobile/src/router.tsx`) — no expo-router or react-navigation. `Route` type is a string union: `"home" | "text" | "image"`.
+- `TABS` in `mobile/App.tsx` is the single source of truth for routes and pages. `BottomNav` imports `TABS` directly from `App.tsx`.
+- Tabs with `hideInNav: true` are reachable only via `navigate(route)`, not from the bottom bar.
+- Styling uses React Native `StyleSheet` throughout — no CSS or Tailwind.
+
+## TV App Conventions
+
+- Uses **Tailwind CSS v4** via `@tailwindcss/vite` (no `tailwind.config.js` — config lives in `vite.config.ts`).
+- Polling only starts when the browser enters fullscreen (`screenStatus === "fullscreen"`).
+- State shape mirrors `DEFAULT_STATE` from the Python function exactly.
+
+## Dev Workflows
+
+```bash
+# TV display
+cd tv && pnpm dev
+
+# Mobile app
+cd mobile && pnpm start     # Expo Go / dev server
+cd mobile && pnpm android   # Android emulator
+cd mobile && pnpm ios       # iOS simulator
+```
+
+Package manager: **pnpm** for both `tv/` and `mobile/`. Python function has no local runner — deploy changes directly.
diff --git a/mobile/App.tsx b/mobile/App.tsx
index 6381c94..500fbfb 100644
--- a/mobile/App.tsx
+++ b/mobile/App.tsx
@@ -10,11 +10,12 @@ interface Tab {
   label: string;
   route: Route;
   page: React.ComponentType;
+  hideInNav?: boolean;
 }
 const TABS: Tab[] = [
   { label: "Home", route: "home", page: IndexPage },
-  { label: "Text", route: "text", page: TextPage },
-  { label: "Image", route: "image", page: ImagePage },
+  { label: "Text", route: "text", page: TextPage, hideInNav: true },
+  { label: "Image", route: "image", page: ImagePage, hideInNav: true },
 ];
 export { TABS, type Tab };
 
@@ -52,39 +53,3 @@ const styles = StyleSheet.create({
     backgroundColor: "#fff",
   },
 });
-
-
-function Screen() {
-  const { route } = useRouter();
-  return (
-    <>
-      {TABS.map((tab) => {
-        if (tab.route === route) {
-          const Page = tab.page;
-          return <Page key={tab.route} />;
-        }
-        return null;
-      })}
-      {!TABS.some((tab) => tab.route === route) && <NotFoundPage />}
-    </>
-  );
-}
-
-export default function App() {
-  return (
-    <RouterProvider>
-      <View style={styles.container}>
-        <StatusBar style="auto" />
-        <Screen />
-        <BottomNav />
-      </View>
-    </RouterProvider>
-  );
-}
-
-const styles = StyleSheet.create({
-  container: {
-    flex: 1,
-    backgroundColor: "#fff",
-  },
-});
diff --git a/mobile/src/components/BottomNav.tsx b/mobile/src/components/BottomNav.tsx
index 88af390..562e723 100644
--- a/mobile/src/components/BottomNav.tsx
+++ b/mobile/src/components/BottomNav.tsx
@@ -8,7 +8,7 @@ export function BottomNav() {
 
   return (
     <View style={styles.bar}>
-      {TABS.map((tab) => {
+      {TABS.filter((tab) => !tab.hideInNav).map((tab) => {
         const active = tab.route === route;
         return (
           <TouchableOpacity
diff --git a/tv/src/App.tsx b/tv/src/App.tsx
index 7813d29..0e6aa16 100644
--- a/tv/src/App.tsx
+++ b/tv/src/App.tsx
@@ -123,8 +123,8 @@ function App() {
 
           {/* Image popup modal */}
           {imagePopup.showing && imagePopup.image_url && (
-            <div className="absolute inset-0 z-20 flex items-center justify-center bg-black/75 backdrop-blur-sm">
-              <div className="flex flex-col items-center gap-5 p-6 bg-gray-950/80 rounded-3xl border border-white/10 shadow-2xl max-w-[90vw] max-h-[92vh]">
+            <div className="absolute inset-0 z-20 flex items-center justify-center bg-black/75 backdrop-blur-sm p-12">
+              <div className="flex flex-col items-center gap-5 p-6 bg-gray-950/80 rounded-3xl border border-white/10 shadow-2xl max-w-[82vw]">
                 {imagePopup.caption && (
                   <h2 className="text-4xl font-bold text-white tracking-tight text-center">
                     {imagePopup.caption}
@@ -133,7 +133,8 @@ function App() {
                 <img
                   src={imagePopup.image_url}
                   alt="TV display"
-                  className="max-w-full max-h-[78vh] rounded-2xl object-contain shadow-xl"
+                  className="max-w-full max-h-[72vh] rounded-2xl object-contain shadow-xl"
+                  style={{ display: "block" }}
                 />
               </div>
             </div>
@@ -142,7 +143,12 @@ function App() {
           {/* Background idle state */}
           {!textState.showing && !imagePopup.showing && (
             <div className="flex items-center justify-center w-full h-full">
-              <p className="text-gray-600 text-lg">Waiting for content...</p>
+              <p className="text-gray-600 text-lg">
+                Waiting for content
+                <span className="dot-1">.</span>
+                <span className="dot-2">.</span>
+                <span className="dot-3">.</span>
+              </p>
             </div>
           )}
         </div>
diff --git a/tv/src/index.css b/tv/src/index.css
index 31db226..25f34b8 100644
--- a/tv/src/index.css
+++ b/tv/src/index.css
@@ -2,4 +2,13 @@
 
 body {
   @apply bg-gray-900 text-white h-screen w-screen flex items-center justify-center;
-}
\ No newline at end of file
+}
+
+@keyframes dot-blink {
+  0%, 80%, 100% { opacity: 0; }
+  40% { opacity: 1; }
+}
+
+.dot-1 { animation: dot-blink 1.4s infinite 0s; }
+.dot-2 { animation: dot-blink 1.4s infinite 0.2s; }
+.dot-3 { animation: dot-blink 1.4s infinite 0.4s; }
\ No newline at end of file