fix: og image generation

lib/og.ts

@@ -6,7 +6,7 @@
  */
 
 import { BOOK_NAMES, CC_LILAS } from "@/lib/constants";
-import { decodeTextFragment } from "@/lib/text-highlight";
+import { decodeTextFragment, extractMatchedText } from "@/lib/text-highlight";
 
 const SITE_URL =
   process.env.NEXT_PUBLIC_SITE_URL || "https://prabhupadasays.org";
@@ -305,13 +305,18 @@ export function ogForLettersByLocation(location: string, count: number) {
 /**
  * Extract a display quote from the `?hl=` search param.
  *
- * The `hl` param encodes `prefix,suffix,length`. We reconstruct a readable
- * snippet from the prefix + suffix: "first few words ... last few words"
+ * When `paragraphs` are provided (from the database), the full matched text
+ * is extracted by searching the content — giving the OG image the actual
+ * selected quote, not just the prefix/suffix.
+ *
+ * When `paragraphs` are not provided, falls back to reconstructing a
+ * readable snippet from prefix + suffix: "first few words ... last few words"
  *
  * Returns null if hl is missing or invalid.
  */
 export function extractQuoteFromHl(
   searchParams: Record<string, string | string[] | undefined> | URLSearchParams,
+  paragraphs?: string[],
 ): string | null {
   const raw =
     searchParams instanceof URLSearchParams
@@ -325,6 +330,23 @@ export function extractQuoteFromHl(
   const fragment = decodeTextFragment(raw);
   if (!fragment) return null;
 
+  // If paragraphs are available, extract the full matched text
+  if (paragraphs && paragraphs.length > 0) {
+    const fullMatch = extractMatchedText(fragment, paragraphs);
+    if (fullMatch) {
+      // Truncate at word boundary if too long for OG image
+      if (fullMatch.length > 280) {
+        const truncated = fullMatch.slice(0, 277);
+        const lastSpace = truncated.lastIndexOf(" ");
+        return (
+          (lastSpace > 200 ? truncated.slice(0, lastSpace) : truncated) + "..."
+        );
+      }
+      return fullMatch;
+    }
+  }
+
+  // Fallback: reconstruct from prefix + suffix
   const { prefix, suffix } = fragment;
   if (!prefix) return null;