Add Mastodon sharing feature and update footer with Mastodon badge

Squashed commit of the following:

commit 87102bff5e03d689debd14aa91a86074b714cc2f
Author: Ariel Costas Guerrero <ariel@costas.dev>
Date:   Tue Mar 3 01:30:20 2026 +0100

    Improve sharing message

commit c04a63ebaaea645460780176c6ab6e3783f00362
Author: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Date:   Tue Mar 3 00:01:00 2026 +0000

    feat: add Mastodon integration (profile badge, share button, fediverse:creator meta tag)

    Co-authored-by: arielcostas <94913521+arielcostas@users.noreply.github.com>

commit d2630b4d4ebee0493bfae117d21ce4a2fe78ffaf
Author: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Date:   Mon Mar 2 23:56:42 2026 +0000

    Initial plan

4 files changed, 19 insertions, 26 deletions

diff --git a/package-lock.json b/package-lock.json
index c162542..1c1a3e8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1410,7 +1410,6 @@
       "version": "2.5.1",
       "resolved": "https://registry.npmjs.org/@parcel/watcher/-/watcher-2.5.1.tgz",
       "integrity": "sha512-dfUnCxiN9H4ap84DvD2ubjw+3vUNpstxa0TneY/Paat8a3R4uQZDLSvWjmznAY/DoahqTHl9V46HF/Zs3F29pg==",
-      "dev": true,
       "hasInstallScript": true,
       "license": "MIT",
       "optional": true,
@@ -1450,7 +1449,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1471,7 +1469,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1492,7 +1489,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1513,7 +1509,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1534,7 +1529,6 @@
       "cpu": [
         "arm"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1555,7 +1549,6 @@
       "cpu": [
         "arm"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1576,7 +1569,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1597,7 +1589,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1618,7 +1609,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1639,7 +1629,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1660,7 +1649,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1681,7 +1669,6 @@
       "cpu": [
         "ia32"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1702,7 +1689,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -2291,7 +2277,6 @@
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.15.0.tgz",
       "integrity": "sha512-NZyJarBfL7nWwIq+FDL6Zp/yHEhePMNnnJ0y3qfieCrmNvYct8uvtiV41UvlSe6apAfk0fY1FbWx+NwfmpvtTg==",
       "license": "MIT",
-      "peer": true,
       "bin": {
         "acorn": "bin/acorn"
       },
@@ -2313,7 +2298,6 @@
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.18.0.tgz",
       "integrity": "sha512-PlXPeEWMXMZ7sPYOHqmDyCJzcfNrUr3fGNKtezX14ykXOEIvyK81d+qydx89KY5O71FKMPaQ2vBfBFI5NHR63A==",
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "fast-deep-equal": "^3.1.3",
         "fast-uri": "^3.0.1",
@@ -2483,7 +2467,6 @@
       "resolved": "https://registry.npmjs.org/astro/-/astro-5.17.3.tgz",
       "integrity": "sha512-69dcfPe8LsHzklwj+hl+vunWUbpMB6pmg35mACjetxbJeUNNys90JaBM8ZiwsPK689SAj/4Zqb1ayaANls9/MA==",
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@astrojs/compiler": "^2.13.0",
         "@astrojs/internal-helpers": "0.7.5",
@@ -3707,7 +3690,6 @@
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-1.0.3.tgz",
       "integrity": "sha512-pGjwhsmsp4kL2RTz08wcOlGN83otlqHeD/Z5T8GXZB+/YcpQ/dgo+lbU8ZsGxV0HIvqqxo9l7mqYwyYMD9bKDg==",
-      "dev": true,
       "license": "Apache-2.0",
       "optional": true,
       "bin": {
@@ -6152,7 +6134,6 @@
       "version": "7.1.1",
       "resolved": "https://registry.npmjs.org/node-addon-api/-/node-addon-api-7.1.1.tgz",
       "integrity": "sha512-5m3bsyrjFWE1xf7nz7YXdN4udnVtXK6/Yfgn5qnahL6bCkf2yKt4k3nuTKAtT4r3IG8JNR2ncsIMdZuAzJjHQQ==",
-      "dev": true,
       "license": "MIT",
       "optional": true
     },
@@ -6459,7 +6440,6 @@
       "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.8.1.tgz",
       "integrity": "sha512-UOnG6LftzbdaHZcKoPFtOcCKztrQ57WkHDeRD9t/PTQtmT0NHSeWWepj6pS0z/N7+08BHFDQVUrfmfMRcZwbMg==",
       "license": "MIT",
-      "peer": true,
       "bin": {
         "prettier": "bin/prettier.cjs"
       },
@@ -6476,7 +6456,6 @@
       "integrity": "sha512-RiBETaaP9veVstE4vUwSIcdATj6dKmXljouXc/DDNwBSPTp8FRkLGDSGFClKsAFeeg+13SB0Z1JZvbD76bigJw==",
       "devOptional": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@astrojs/compiler": "^2.9.1",
         "prettier": "^3.0.0",
@@ -6973,7 +6952,6 @@
       "resolved": "https://registry.npmjs.org/rollup/-/rollup-4.50.1.tgz",
       "integrity": "sha512-78E9voJHwnXQMiQdiqswVLZwJIzdBKJ1GdI5Zx6XwoFKUIk09/sSrr+05QFzvYb8q6Y9pPV45zzDuYa3907TZA==",
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@types/estree": "1.0.8"
       },
@@ -7051,7 +7029,6 @@
       "integrity": "sha512-fDz1zJpd5GycprAbu4Q2PV/RprsRtKC/0z82z0JLgdytmcq0+ujJbJ/09bPGDxCLkKY3Np5cRAOcWiVkLXJURg==",
       "devOptional": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "chokidar": "^4.0.0",
         "immutable": "^5.0.2",
@@ -7488,7 +7465,6 @@
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
       "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
       "license": "Apache-2.0",
-      "peer": true,
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
@@ -7895,7 +7871,6 @@
       "resolved": "https://registry.npmjs.org/vite/-/vite-6.4.1.tgz",
       "integrity": "sha512-+Oxm7q9hDoLMyJOYfUYBuHQo+dkAloi33apOPP56pzj+vsdJDzr+j1NISE5pyaAuKL4A3UD34qd0lx5+kfKp2g==",
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "esbuild": "^0.25.0",
         "fdir": "^6.4.4",
@@ -8487,7 +8462,6 @@
       "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
       "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
       "license": "MIT",
-      "peer": true,
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
       }
diff --git a/src/layouts/BlogSingleLayout.astro b/src/layouts/BlogSingleLayout.astro
index 70b62c2..d3396ec 100644
--- a/src/layouts/BlogSingleLayout.astro
+++ b/src/layouts/BlogSingleLayout.astro
@@ -47,6 +47,10 @@ const schema = {
     },
   },
 };
+
+const textToEncode = `${entry.data.title}\r\n\r\n${Astro.url.toString()} por @arielcg@mastodon.social`;
+
+const mastodonShareUrl = `https://share.joinmastodon.org/#text=${encodeURIComponent(textToEncode)}`;
 ---
 
 <Layout title={entry.data.title} description={entry.data.description}>
@@ -79,6 +83,8 @@ const schema = {
 
   <p>
     <a href="/blog/">Volver al blog</a>
+    &nbsp;·&nbsp;
+    <a href={mastodonShareUrl} rel="noopener noreferrer">Compartir en Mastodon</a>
   </p>
 </Layout>
 
diff --git a/src/layouts/Layout.astro b/src/layouts/Layout.astro
index f484ce8..ebe5917 100644
--- a/src/layouts/Layout.astro
+++ b/src/layouts/Layout.astro
@@ -42,6 +42,8 @@ const { title, description, empty } = Astro.props;
     <meta name="twitter:description" content={description} />
     <meta name="twitter:image" content="/favicon.png" />
 
+    <meta name="fediverse:creator" content="@arielcg@mastodon.social" />
+
     <title>{title} - Ariel Costas</title>
 
     <slot name="head-jsonld" />
diff --git a/src/partials/Footer.astro b/src/partials/Footer.astro
index 710006a..4a5cb99 100644
--- a/src/partials/Footer.astro
+++ b/src/partials/Footer.astro
@@ -32,6 +32,12 @@ import t from "../i18n/es.json";
         href="https://github.com/arielcostas/costasdev"
         >BY-SA 4.0</a
       >
+    </article>
+
+    <article id="footer-badge-mastodon">
+      <Icon name="tabler:brand-mastodon" />
+      <a href="https://mastodon.social/@arielcg" rel="me noopener noreferrer">@arielcg</a>
+    </article>
   </section>
 </footer>
 
@@ -109,5 +115,10 @@ import t from "../i18n/es.json";
       background: linear-gradient(to bottom, #333, #000);
       color: white;
     }
+
+    #footer-badge-mastodon {
+      background: linear-gradient(to bottom, #6364ff, #563acc);
+      color: white;
+    }
   }
 </style>