fix: letter source

components/text-selection-toolbar.tsx

@@ -202,10 +202,17 @@ function getSourceReference(): {
     parts[1] !== "recipient" &&
     parts[1] !== "location"
   ) {
-    // Try to get the title from the h1
+    // h1 contains "Letter to Mukunda" — use it as the title
     const h1 = document.querySelector("h1");
     const title = h1?.textContent?.trim() || "Letter";
-    return { title: "Letters of Śrīla Prabhupāda", detail: title, url };
+
+    // The <p> sibling after h1 contains "15 January, 1968 · Calcutta"
+    const metaP = document.querySelector(
+      "header p.text-muted-foreground, header p[class*='muted']",
+    );
+    const meta = metaP?.textContent?.trim() || null;
+
+    return { title, detail: meta, url };
   }
 
   // /essays/[slug]