add workflow and embed

index.html

@@ -7,6 +7,27 @@
     <link rel="icon" type="image/svg+xml" href="./favicon.svg" />
     <link rel="icon" type="image/x-icon" href="./favicon.ico" sizes="any" />
     <link rel="apple-touch-icon" href="./apple-touch-icon.png" />
+
+    <!-- Standard link-preview metadata (Open Graph / Twitter) -->
+    <meta property="og:type" content="website" />
+    <meta property="og:title" content="CMU Meal Estimator" />
+    <meta
+      property="og:description"
+      content="See the meal blocks and FLEX dollars a CMU student should have used by any date."
+    />
+    <meta property="og:image" content="./apple-touch-icon.png" />
+    <meta name="twitter:card" content="summary" />
+
+    <!--
+      Discord Components V2 link embed. The content below is a placeholder that
+      is replaced at build time (scripts/inject-embed.mjs) with the current
+      day's Red-plan estimate. Discord's crawler reads this static JSON; it is
+      never executed by the browser.
+    -->
+    <script id="discord:component-embed" type="application/json">
+      __DISCORD_EMBED_JSON__
+    </script>
+
     <link rel="preconnect" href="https://fonts.googleapis.com" />
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
     <link