feat(frontend): installable on the phone with its own icon, title and manifest, missing avatars are asked again later

frontend/src/app.html

@@ -1,9 +1,18 @@
 <!doctype html>
-<html lang="en">
+<html lang="ru">
 	<head>
 		<meta charset="utf-8" />
 		<meta content="width=device-width, initial-scale=1" name="viewport" />
 		<meta content="scale" name="text-scale" />
+		<meta content="#ffffff" media="(prefers-color-scheme: light)" name="theme-color" />
+		<meta content="#212121" media="(prefers-color-scheme: dark)" name="theme-color" />
+		<meta content="yes" name="mobile-web-app-capable" />
+		<meta content="black-translucent" name="apple-mobile-web-app-status-bar-style" />
+		<meta content="Beavergram" name="apple-mobile-web-app-title" />
+		<link href="/icon.svg" rel="icon" type="image/svg+xml" />
+		<link href="/apple-touch-icon.png" rel="apple-touch-icon" />
+		<link href="/manifest.webmanifest" rel="manifest" />
+		<title>Beavergram</title>
 		<script>
 			(() => {
 				const stored = localStorage.getItem("bg.theme");

frontend/src/lib/api/avatars.ts

@@ -4,13 +4,27 @@ import { PUBLIC_API_BASE_URL } from "$app/env/public";
 
 const BASE = PUBLIC_API_BASE_URL;
 const RETRY_DELAY = 2500;
+const MISSING_TTL = 120_000;
 
 export type AvatarKind = "peer" | "chat";
 
 const MAX_CACHED = 240;
 
 const ready = new Map<string, string>();
-const missing = new Set<string>();
+const missing = new Map<string, number>();
+
+function isMissing(key: string): boolean {
+  const since = missing.get(key);
+  if (since === undefined) {
+    return false;
+  }
+  if (Date.now() - since < MISSING_TTL) {
+    return true;
+  }
+  missing.delete(key);
+  return false;
+}
+
 const inflight = new Map<string, Promise<string | null>>();
 
 function cacheKey(account: number, kind: AvatarKind, id: number): string {
@@ -60,7 +74,7 @@ async function fetchAvatar(
     await delay(RETRY_DELAY);
     return fetchAvatar(account, kind, id, key, false);
   }
-  missing.add(key);
+  missing.set(key, Date.now());
   return null;
 }
 
@@ -77,7 +91,7 @@ export function loadAvatar(
   if (cached) {
     return Promise.resolve(cached);
   }
-  if (missing.has(key)) {
+  if (isMissing(key)) {
     return Promise.resolve(null);
   }
   const existing = inflight.get(key);
@@ -110,7 +124,7 @@ async function fetchVariant(
     await delay(RETRY_DELAY);
     return fetchVariant(account, kind, id, uniqueId, key, false);
   }
-  missing.add(key);
+  missing.set(key, Date.now());
   return null;
 }
 
@@ -128,7 +142,7 @@ export function loadAvatarVariant(
   if (cached) {
     return Promise.resolve(cached);
   }
-  if (missing.has(key)) {
+  if (isMissing(key)) {
     return Promise.resolve(null);
   }
   const existing = inflight.get(key);

frontend/src/lib/assets/favicon.svg

@@ -1,16 +0,0 @@
-<svg
-  height="128"
-  viewBox="0 0 107 128"
-  width="107"
-  xmlns="http://www.w3.org/2000/svg"
->
-  <title>svelte-logo</title>
-  <path
-    d="M94.157 22.819c-10.4-14.885-30.94-19.297-45.792-9.835L22.282 29.608A29.92 29.92 0 0 0 8.764 49.65a31.5 31.5 0 0 0 3.108 20.231 30 30 0 0 0-4.477 11.183 31.9 31.9 0 0 0 5.448 24.116c10.402 14.887 30.942 19.297 45.791 9.835l26.083-16.624A29.92 29.92 0 0 0 98.235 78.35a31.53 31.53 0 0 0-3.105-20.232 30 30 0 0 0 4.474-11.182 31.88 31.88 0 0 0-5.447-24.116"
-    style="fill:#ff3e00"
-  />
-  <path
-    d="M45.817 106.582a20.72 20.72 0 0 1-22.237-8.243 19.17 19.17 0 0 1-3.277-14.503 18 18 0 0 1 .624-2.435l.49-1.498 1.337.981a33.6 33.6 0 0 0 10.203 5.098l.97.294-.09.968a5.85 5.85 0 0 0 1.052 3.878 6.24 6.24 0 0 0 6.695 2.485 5.8 5.8 0 0 0 1.603-.704L69.27 76.28a5.43 5.43 0 0 0 2.45-3.631 5.8 5.8 0 0 0-.987-4.371 6.24 6.24 0 0 0-6.698-2.487 5.7 5.7 0 0 0-1.6.704l-9.953 6.345a19 19 0 0 1-5.296 2.326 20.72 20.72 0 0 1-22.237-8.243 19.17 19.17 0 0 1-3.277-14.502 17.99 17.99 0 0 1 8.13-12.052l26.081-16.623a19 19 0 0 1 5.3-2.329 20.72 20.72 0 0 1 22.237 8.243 19.17 19.17 0 0 1 3.277 14.503 18 18 0 0 1-.624 2.435l-.49 1.498-1.337-.98a33.6 33.6 0 0 0-10.203-5.1l-.97-.294.09-.968a5.86 5.86 0 0 0-1.052-3.878 6.24 6.24 0 0 0-6.696-2.485 5.8 5.8 0 0 0-1.602.704L37.73 51.72a5.42 5.42 0 0 0-2.449 3.63 5.79 5.79 0 0 0 .986 4.372 6.24 6.24 0 0 0 6.698 2.486 5.8 5.8 0 0 0 1.602-.704l9.952-6.342a19 19 0 0 1 5.295-2.328 20.72 20.72 0 0 1 22.237 8.242 19.17 19.17 0 0 1 3.277 14.503 18 18 0 0 1-8.13 12.053l-26.081 16.622a19 19 0 0 1-5.3 2.328"
-    style="fill:#fff"
-  />
-</svg>

frontend/static/icon.svg

@@ -0,0 +1,18 @@
+<svg viewBox="0 0 512 512" xmlns="http://www.w3.org/2000/svg">
+  <title>Beavergram</title>
+  <defs>
+    <linearGradient id="bg" x1="0" x2="0" y1="0" y2="1">
+      <stop offset="0" stop-color="#4fa3f3" />
+      <stop offset="1" stop-color="#2b7fdc" />
+    </linearGradient>
+  </defs>
+  <rect fill="url(#bg)" height="512" rx="112" width="512" />
+  <path d="M112 222 396 106 224 252Z" fill="#fff" />
+  <path d="M396 106 224 252 330 300Z" fill="#fff" fill-opacity=".86" />
+  <path d="M224 252 230 314 266 270Z" fill="#fff" fill-opacity=".7" />
+  <path
+    d="M128 344h256v28a36 36 0 0 1-36 36H164a36 36 0 0 1-36-36Z"
+    fill="#fff"
+  />
+  <rect fill="#3a8be6" height="14" rx="7" width="80" x="216" y="362" />
+</svg>

frontend/static/manifest.webmanifest

@@ -0,0 +1,20 @@
+{
+  "name": "Beavergram",
+  "short_name": "Beavergram",
+  "start_url": "/app",
+  "scope": "/",
+  "display": "standalone",
+  "background_color": "#212121",
+  "theme_color": "#212121",
+  "icons": [
+    { "src": "/icon-192.png", "sizes": "192x192", "type": "image/png" },
+    { "src": "/icon-512.png", "sizes": "512x512", "type": "image/png" },
+    {
+      "src": "/icon-512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "maskable"
+    },
+    { "src": "/icon.svg", "sizes": "any", "type": "image/svg+xml" }
+  ]
+}