Added favicon, text stroke and changes to data handling

public/browserconfig.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<browserconfig>
+    <msapplication>
+        <tile>
+            <square150x150logo src="/mstile-150x150.png"/>
+            <TileColor>#00aba9</TileColor>
+        </tile>
+    </msapplication>
+</browserconfig>

public/safari-pinned-tab.svg

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+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 20010904//EN"
+ "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
+<svg version="1.0" xmlns="http://www.w3.org/2000/svg"
+ width="96.000000pt" height="96.000000pt" viewBox="0 0 96.000000 96.000000"
+ preserveAspectRatio="xMidYMid meet">
+<metadata>
+Created by potrace 1.14, written by Peter Selinger 2001-2017
+</metadata>
+<g transform="translate(0.000000,96.000000) scale(0.100000,-0.100000)"
+fill="#000000" stroke="none">
+<path d="M422 899 l4 -59 -34 0 c-20 0 -32 -5 -31 -12 5 -44 -1 -55 -31 -50
+l-29 4 1 -57 c2 -59 -10 -79 -41 -67 -22 8 -30 22 -26 44 3 14 -2 18 -24 18
+l-28 0 0 -289 c-1 -264 4 -327 23 -309 14 14 41 -11 39 -36 -3 -24 -1 -24 52
+-22 56 2 68 -5 68 -39 0 -19 7 -20 116 -21 100 -1 116 2 116 15 0 45 2 46 60
+46 58 0 58 0 58 30 1 27 4 30 31 28 l30 -1 0 236 -1 237 -27 3 c-31 4 -30 0
+-31 110 -1 72 -1 73 -26 70 -20 -2 -27 -9 -29 -29 -2 -20 -10 -28 -28 -32 -30
+-5 -33 1 -36 68 -3 48 -4 50 -34 53 -28 3 -30 6 -26 33 3 22 1 30 -9 29 -38
+-6 -49 1 -49 28 0 23 -4 27 -31 28 l-30 2 3 -59z"/>
+</g>
+</svg>

public/site.webmanifest

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+{
+    "name": "Cartes de Leim",
+    "short_name": "Cartes de Leim",
+    "icons": [
+        {
+            "src": "/android-chrome-96x96.png",
+            "sizes": "96x96",
+            "type": "image/png"
+        }
+    ],
+    "theme_color": "#a9d1eb",
+    "background_color": "#a9d1eb",
+    "display": "standalone"
+}