performance improvements

backend/src/models.rs

@@ -86,7 +86,7 @@ pub struct CoverImage {
     pub alt: String,
 }
 
-#[derive(Serialize)]
+#[derive(Serialize, Clone)]
 pub struct PostInfo {
     pub slug: String,
     pub date: NaiveDate,
@@ -103,6 +103,13 @@ pub struct PostInfo {
     pub image_count: u32,
 }
 
+#[derive(Serialize, Clone)]
+pub struct PostNeighbor {
+    pub slug: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub title: Option<String>,
+}
+
 #[derive(Serialize)]
 pub struct PostDetail {
     pub slug: String,
@@ -118,6 +125,10 @@ pub struct PostDetail {
     #[serde(skip_serializing_if = "Option::is_none")]
     pub cover_image: Option<CoverImage>,
     pub image_count: u32,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub prev: Option<PostNeighbor>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub next: Option<PostNeighbor>,
 }
 
 #[derive(Deserialize)]