`, favicon, and body of `Root()` to\nmatch your app's existing `index.html`, and stamp anything else your shell\nreferences directly (images, css) with `immutableFileUrl()`.\n\n1. Create `frontend/root.tsx`:\n\n```tsx\n/** @jsxImportSource npm:hono@4/jsx */\nimport { raw } from \"npm:hono@4/html\";\nimport { immutableFileUrl } from \"https://esm.town/v/std/utils/index.ts\";\n\n// The HTML shell for the app. It is never cached, so immutableFileUrl can stamp\n// the current val version into each asset URL — the browser caches those\n// immutably, and publishing the val changes the URLs, refetching exactly once.\nexport function Root() {\n return (\n <>\n {raw(\"<!DOCTYPE html>\")}\n <html lang=\"en\">\n <head>\n <meta charSet=\"UTF-8\" />\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />\n <title>React Hono Val Town Starter

[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8,"_9":10},"actionData","errors","root",{"_323":324,"_325":326},"routes/_app.x.$handle.$name",{"_11":12,"_13":14,"_15":16,"_18":19,"_17":-7,"_244":-5,"_20":245,"_22":246,"_247":248,"_249":250,"_26":251,"_24":252,"_253":-5,"_254":-5,"_255":52,"_256":257,"_258":43,"_259":-5,"_260":-5,"_261":262},"routes/_app.x.$handle.$name.branch.$branch.code.$",{"_11":12,"_13":14,"_15":16,"_17":-7,"_18":19,"_20":21,"_22":23,"_24":25,"_26":27,"_28":-5,"_29":-5,"_30":-5,"_31":-5,"_32":-5},"handle","dominik1","name","radio-app","branchName","main","version","path","index.ts","project",{"_33":186,"_13":14,"_44":187,"_188":-5,"_189":52,"_190":191,"_192":191,"_193":194,"_195":-5,"_196":197,"_198":36,"_199":43,"_200":-5,"_201":-5,"_202":79,"_203":204,"_205":206,"_207":208,"_209":210,"_211":-5,"_212":213,"_214":213,"_215":216,"_217":216,"_218":216,"_219":213,"_220":213,"_221":222,"_223":224,"_225":226,"_227":52},"tree",[56,57,58,59,60],"file",{"_33":34,"_13":19,"_35":36,"_37":-5,"_38":39,"_40":41,"_42":43,"_44":45,"_17":46,"_47":48,"_49":50,"_51":52,"_53":54,"_18":55},"contents",[],"upstream","pull","ahead","behind","envVars","id","2e72c349-1de0-48e8-bf6f-89aa2fc88706","fileId","01a09ba5-f0b0-766b-99ae-1c7a57d8f892","parentId","branchId","26a9cea8-03a5-4dee-ab96-5b9583a81dac","branchVersion",86,"latest",true,"createdAt",["D",1789327445304],17,"fileType","http","content","import { parseVal, readFile, serveImmutableFile } from \"https://esm.town/v/std/utils/index.ts\";\nimport { blob } from \"https://esm.town/v/std/blob/main.ts\";\nimport { Hono } from \"npm:hono\";\nimport { Root } from \"./frontend/root.tsx\";\nimport { STATIONS } from \"./lib/stations.ts\";\nimport { ICONS } from \"./lib/icons.ts\";\n\nconst app = new Hono();\n\n// Krótki, stabilny skrót tekstu (djb2) — wersja logo w URL-u, żeby po zmianie\n// źródła logo przeglądarka nie trzymała starego obrazka z cache.\nconst shortHash = (s: string) => {\n let h = 5381;\n for (let i = 0; i < s.length; i++) h = ((h * 33) ^ s.charCodeAt(i)) >>> 0;\n return h.toString(36);\n};\n\n// Rozpoznaje typ obrazka po zawartości. Źródła bywają źle opisane, a przy\n// nosniff przeglądarka nie wyświetli SVG podanego np. jako \"image/*\".\nfunction sniffImageType(b: Uint8Array): string | null {\n if (b[0] === 0x89 && b[1] === 0x50 && b[2] === 0x4e && b[3] === 0x47) return \"image/png\";\n if (b[0] === 0xff && b[1] === 0xd8 && b[2] === 0xff) return \"image/jpeg\";\n if (b[0] === 0x47 && b[1] === 0x49 && b[2] === 0x46) return \"image/gif\";\n if (String.fromCharCode(...b.subarray(0, 4)) === \"RIFF\" && String.fromCharCode(...b.subarray(8, 12)) === \"WEBP\") {\n return \"image/webp\";\n }\n const head = new TextDecoder().decode(b.subarray(0, 2048)).toLowerCase();\n if (head.includes(\"\n c.json(\n STATIONS.map(({ id, name, desc, short, accent, logo, bg, stream, hls }) => ({\n id,\n name,\n desc,\n short,\n accent,\n logo,\n bg,\n logoV: logo ? shortHash(logo) : null,\n src: stream.startsWith(\"https://\") ? stream : null,\n hls: !!hls,\n })),\n )\n);\n\n// Proxy logotypów z self-hostem: /logo/:id pobiera obraz ze źródła (logo) przy\n// pierwszym wejściu i ZAPISUJE go w storage vala. Odtąd serwujemy z własnego\n// storage — niezależnie od źródła (Cloudflare, rotujące timestampy itd.).\n// Zmiana adresu logo w lib/stations.ts unieważnia zapisaną kopię (meta.src).\n// Jeśli logo brak lub nie udało się pobrać → 404 (UI pokazuje wordmark).\napp.get(\"/logo/:id\", async (c) => {\n const id = c.req.param(\"id\");\n const station = STATIONS.find((s) => s.id === id);\n if (!station?.logo) return c.json({ error: \"Brak logo.\" }, 404);\n\n const key = `logo:${id}`;\n const metaKey = `logo-meta:${id}`;\n const headers = (ct: string) => ({ \"Content-Type\": ct, \"Cache-Control\": \"public, max-age=86400\" });\n\n // Logo trzymane w samym valu (ścieżka od \"/\", np. /frontend/logos/x.svg) — czytamy\n // plik wprost, bez kopii w blobach. readFile zwraca tekst, więc tylko SVG.\n if (station.logo.startsWith(\"/\")) {\n try {\n const buf = new TextEncoder().encode(await readFile(station.logo, import.meta.url));\n const ct = sniffImageType(buf);\n return ct ? new Response(buf, { headers: headers(ct) }) : c.json({ error: \"Brak logo.\" }, 404);\n } catch {\n return c.json({ error: \"Brak logo.\" }, 404);\n }\n }\n\n try {\n // 1) Już zgrane z tego samego źródła? Serwuj ze storage vala.\n try {\n const meta = await blob.getJSON<{ ct?: string; src?: string } | undefined>(metaKey);\n if (meta?.ct && meta.src === station.logo) {\n const res = await blob.get(key);\n if (res && res.ok) return new Response(await res.arrayBuffer(), { headers: headers(meta.ct) });\n }\n } catch {\n /* brak zgranego — pobierz ze źródła */\n }\n\n // 2) Pierwszy raz (albo zmienione źródło) — pobierz ze źródła.\n const up = await fetch(station.logo, {\n headers: {\n \"User-Agent\": \"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0 Safari/537.36\",\n \"Accept\": \"image/avif,image/webp,image/png,image/svg+xml,image/*,*/*;q=0.8\",\n \"Referer\": new URL(station.logo).origin + \"/\",\n },\n });\n if (!up.ok) return c.json({ error: \"Brak logo.\" }, 404);\n const buf = new Uint8Array(await up.arrayBuffer());\n const upCt = up.headers.get(\"content-type\")?.split(\";\")[0].trim() ?? \"\";\n const ct = sniffImageType(buf) ?? (upCt.startsWith(\"image/\") && upCt !== \"image/*\" ? upCt : null);\n if (!ct) return c.json({ error: \"Brak logo.\" }, 404);\n\n // Zgarnij do siebie (najpierw obraz, potem meta) — błąd w cache NIE może zepsuć odpowiedzi.\n try {\n await blob.set(key, buf);\n await blob.setJSON(metaKey, { ct, src: station.logo });\n } catch {\n /* cache po cichu pomijamy — nadal serwujemy obrazek */\n }\n\n return new Response(buf, { headers: headers(ct) });\n } catch {\n return c.json({ error: \"Brak logo.\" }, 404);\n }\n});\n\n// Proxy audio (zapasowe): przeglądarka trafia na HTTPS /stream/:id, a my pobieramy\n// upstream i przesyłamy jego strumień dalej. Używane dla strumieni po czystym HTTP\n// i awaryjnie, gdy bezpośrednie połączenie z serwerem stacji się nie udaje.\napp.get(\"/stream/:id\", async (c) => {\n const id = c.req.param(\"id\");\n const station = STATIONS.find((s) => s.id === id);\n if (!station) return c.json({ error: \"Nieznana stacja.\" }, 404);\n if (station.hls) return c.json({ error: \"Stacja HLS — odtwarzana bezpośrednio, bez proxy.\" }, 400);\n\n try {\n // User-Agent klienta audio (VLC), nie przeglądarki — niektóre serwery\n // SHOUTcast oddają przeglądarce HTML strony statusu, a strumień audio\n // — wyłącznie \"odtwarzaczom\".\n const upstream = await fetch(station.stream, {\n headers: {\n \"User-Agent\": \"VLC/3.0.18 LibVLC/3.0.18\",\n },\n });\n if (!upstream.ok || !upstream.body) {\n return c.json({ error: `Stacja chwilowo niedostępna (${upstream.status}).` }, 502);\n }\n // Przekazujemy strumień audio jako body odpowiedzi\n return new Response(upstream.body, {\n status: upstream.status,\n headers: {\n \"Content-Type\": upstream.headers.get(\"content-type\") ?? \"audio/mpeg\",\n \"Cache-Control\": \"no-cache\",\n \"X-Accel-Buffering\": \"no\",\n },\n });\n } catch {\n return c.json({ error: \"Nie udało się połączyć ze stacją.\" }, 502);\n }\n});\n\n// Instalacja jako aplikacja (PWA) — manifest i ikony ekranu głównego.\n// Ikony mają pełne tło z falami w bezpiecznej strefie, więc służą też jako „maskable” (Android).\nconst MANIFEST = {\n name: \"Radio PL\",\n short_name: \"Radio PL\",\n description: \"Polskie stacje radiowe — klikasz i gra.\",\n lang: \"pl\",\n start_url: \"/\",\n scope: \"/\",\n display: \"standalone\",\n orientation: \"portrait\",\n background_color: \"#f6f4ef\",\n theme_color: \"#f6f4ef\",\n icons: [\n { src: \"/icons/icon-192.png\", sizes: \"192x192\", type: \"image/png\", purpose: \"any\" },\n { src: \"/icons/icon-512.png\", sizes: \"512x512\", type: \"image/png\", purpose: \"any\" },\n { src: \"/icons/icon-192.png\", sizes: \"192x192\", type: \"image/png\", purpose: \"maskable\" },\n { src: \"/icons/icon-512.png\", sizes: \"512x512\", type: \"image/png\", purpose: \"maskable\" },\n ],\n};\n\napp.get(\"/manifest.webmanifest\", (c) =>\n c.body(JSON.stringify(MANIFEST), 200, {\n \"Content-Type\": \"application/manifest+json\",\n \"Cache-Control\": \"public, max-age=3600\",\n })\n);\n\napp.get(\"/icons/:name\", (c) => {\n const b64 = ICONS[c.req.param(\"name\")];\n if (!b64) return c.json({ error: \"Brak ikony.\" }, 404);\n return new Response(Uint8Array.from(atob(b64), (ch) => ch.charCodeAt(0)), {\n headers: { \"Content-Type\": \"image/png\", \"Cache-Control\": \"public, max-age=604800\" },\n });\n});\n\n// Serve the (never-cached) HTML shell at the root /\napp.get(\"/\", (c) => c.html(Root()));\n\n// Serve frontend files at the version-addressed URLs Root() stamps, cached immutably\napp.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path));\n\n// View source redirect\napp.get(\"/source\", (c) => c.redirect(parseVal().links.self.val));\n\n// Unwrap and rethrow Hono errors as the original error\napp.onError((err) => Promise.reject(err));\n\n// HTTP vals expect an exported \"fetch handler\"\nexport default app.fetch;\n","deleted",false,"label","radio-pl",[19],{"_33":111,"_13":112,"_35":113,"_37":-5,"_38":39,"_40":77,"_42":43,"_44":114,"_17":79,"_47":88,"_49":-5,"_51":52,"_53":-5,"_62":115,"_18":116},{"_33":83,"_13":84,"_35":85,"_37":-5,"_38":39,"_40":86,"_42":43,"_44":87,"_17":79,"_47":88,"_49":-5,"_51":52,"_53":-5,"_62":89,"_18":90},{"_33":74,"_13":75,"_35":76,"_37":-5,"_38":39,"_40":77,"_42":43,"_44":78,"_17":79,"_47":24,"_49":80,"_51":52,"_53":-5,"_62":81,"_18":82},{"_33":65,"_13":66,"_35":67,"_37":-5,"_38":39,"_40":68,"_42":43,"_44":69,"_17":70,"_47":24,"_49":71,"_51":52,"_53":-5,"_62":72,"_18":73},{"_33":34,"_13":19,"_35":36,"_37":-5,"_38":39,"_40":41,"_42":43,"_44":61,"_17":46,"_47":48,"_49":50,"_51":52,"_53":54,"_62":63,"_18":64},["D",1789327445304],"children",[],[19],"20e03dc8-9774-4e0a-bd5b-1ca54eabd7ba","README.md","01a09ba5-f0b0-766b-99ae-1becdd352fcb",85,["D",1789327431757],6,"# 📻 Radio PL\n\nMinimalny, mobile-first odtwarzacz polskich stacji radiowych. Klikasz stację — i gra.\nJasna, „redakcyjna” szata (bez kiczu). Zbudowany na Val Town (React + Hono).\n\n## Otwórz: \n\n## Stacje\n\n25 stacji, pogrupowanych w `lib/stations.ts`:\n\n| Grupa | Stacje | Format |\n| --- | --- | --- |\n| RMF | RMF FM, RMF MAXX, RMF Classic, RMF24 | MP3 (HTTPS) |\n| Polskie Radio | Jedynka, Dwójka, Trójka, Czwórka, Polskie Radio 24 | AAC · HLS (hls.js; w Safari natywnie) |\n| Niezależne | Radio Nowy Świat, Radio 357 | MP3 / AAC (HTTPS) |\n| Agora | TOK FM, Radio Złote Przeboje, Radio Pogoda, KISS FM | MP3 (HTTPS) |\n| ZPR Media | Eska, Eska 2, Eska Rock, VOX FM | MP3 (HTTPS) |\n| Eurozet | Radio ZET, Antyradio, Chillizet, Meloradio, Radio Plus | MP3 (HTTPS) |\n| Regionalne | Radio Lublin | MP3 (HTTPS) |\n\n## Instalacja jako aplikacja\n\nStrona ma manifest PWA (`/manifest.webmanifest`) i ikony (`/icons/*`, źródło w `lib/icons.ts`):\nw Chrome na Androidzie „Dodaj do ekranu głównego” / „Zainstaluj aplikację” daje ikonę z falami\nradiowymi i uruchamia odtwarzacz w osobnym oknie, bez paska adresu.\n\n## Jak to działa\n\n```mermaid\ngraph LR\n Browser[Przeglądarka] -->|klik| UI[\"React · frontend/components\"]\n UI -->|GET /api/stations| API[\"Hono · index.ts\"]\n UI -->|\"audio src (HTTPS, bezpośrednio)\"| Upstream[\"Serwer stacji\"]\n UI -.->|awaryjnie /stream/:id| Proxy[\"Proxy audio\"]\n Proxy -.-> Upstream\n```\n\n- **Odtwarzanie bezpośrednie** — strumienie HTTPS grają wprost z serwerów stacji.\n Wcześniej wszystko szło przez proxy vala (serwer w USA), co dawało zacięcia.\n- **Automatyczne wznawianie** — przy zerwaniu, `ended` albo braku postępu przez\n 10 s odtwarzacz łączy się ponownie (rosnący odstęp, maks. 6 prób). Po 2 nieudanych\n próbach bezpośrednich przełącza się na proxy.\n- **Proxy audio** `/stream/:id` — zapasowe; obsługuje też czysty `http://`\n (bez blokady „mixed content”). User-Agent = VLC, bo serwery SHOUTcast oddają\n przeglądarkom HTML strony statusu zamiast strumienia.\n- **Logotypy** `/logo/:id` — zgrywane raz do blob storage vala; zmiana adresu w\n `lib/stations.ts` automatycznie odświeża kopię. Typ obrazka rozpoznawany po zawartości.\n\n## Pliki\n\n```\nindex.ts ← Hono: /api/stations, /logo/:id, proxy audio /stream/:id\nlib/stations.ts ← stacje (nazwa, monogram, kolor akcentu, strumień)\nfrontend/\n root.tsx ← HTML shell (jasny motyw, Google Fonts)\n index.tsx ← entrypoint React\n components/App.tsx ← lista stacji + przyklejona belka odtwarzacza\n```\n\nRemix szablonu [`react-hono-starter`](https://www.val.town/x/templates/react-hono-starter).\n",[],[66],"b0a8eb41-6bfe-4c12-ab32-41c3780b4f4d","CHANGELOG.md","01a09ba5-f0b0-766b-99ae-14a493a1cbdf",1,["D",1789317738487],0,"# Changelog\n\n## 2026-07-30 — Immutable asset caching\n\nFrontend files are now served at version-addressed URLs\n(`/__immutable/45/frontend/index.tsx`) with\n`Cache-Control: public, max-age=31536000, immutable`, so repeat visits load the\nwhole client graph from the browser cache — roughly 3× faster (~665ms → ~157ms\nmeasured). Publishing your val bumps its version, which changes every URL, so\ncaches invalidate automatically. Old-version URLs return 404 after a publish\n(like Next.js build assets); a reload picks up the new version.\n\nWhat changed in the template:\n\n- `frontend/index.html` → [`frontend/root.tsx`](/frontend/root.tsx): the HTML\n shell is now JSX and stamps asset URLs with `immutableFileUrl()`\n- [`index.ts`](/index.ts): serves `Root()` at `/`, and one\n `app.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path))` route\n serves all frontend files\n\n### Upgrading an existing remix\n\nYour copy of this template doesn't update automatically. Two options:\n\n**Minimal (most of the benefit):** point both routes at `serveImmutableFile` —\nyour existing bare URLs redirect into versioned space, the new route serves\nthem, and the whole module graph gets cached (costs one redirect per page view):\n\n```ts\nimport { serveImmutableFile } from \"https://esm.town/v/std/utils/index.ts\";\n\napp.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path));\napp.get(\"/frontend/**/*\", (c) => serveImmutableFile(c.req.path)); // was serveFile\n```\n\n**Full upgrade (also removes the redirect):** three self-contained steps —\nno other files needed. Adjust the ``, favicon, and body of `Root()` to\nmatch your app's existing `index.html`, and stamp anything else your shell\nreferences directly (images, css) with `immutableFileUrl()`.\n\n1. Create `frontend/root.tsx`:\n\n```tsx\n/** @jsxImportSource npm:hono@4/jsx */\nimport { raw } from \"npm:hono@4/html\";\nimport { immutableFileUrl } from \"https://esm.town/v/std/utils/index.ts\";\n\n// The HTML shell for the app. It is never cached, so immutableFileUrl can stamp\n// the current val version into each asset URL — the browser caches those\n// immutably, and publishing the val changes the URLs, refetching exactly once.\nexport function Root() {\n return (\n <>\n {raw(\"<!DOCTYPE html>\")}\n <html lang=\"en\">\n <head>\n <meta charSet=\"UTF-8\" />\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />\n <title>React Hono Val Town Starter\n