feat: Implement pagination for user media retrieval and update related structures

libertas_core/src/schema.rs

@@ -87,3 +87,37 @@ pub struct MediaImportBundle {
     pub metadata_models: Vec<MediaMetadata>,
     pub file_size: i64,
 }
+
+#[derive(Debug, Clone)]
+pub struct PaginatedResponse<T> {
+    pub data: Vec<T>,
+    pub page: u32,
+    pub limit: u32,
+    pub total_items: i64,
+    pub total_pages: u32,
+    pub has_next_page: bool,
+    pub has_prev_page: bool,
+}
+
+impl<T> PaginatedResponse<T> {
+    pub fn new(data: Vec<T>, page: u32, limit: u32, total_items: i64) -> Self {
+        let total_pages = if limit == 0 {
+            0
+        } else {
+            (total_items as f64 / limit as f64).ceil() as u32
+        };
+
+        let has_next_page = page < total_pages;
+        let has_prev_page = page > 1;
+
+        Self {
+            data,
+            page,
+            limit,
+            total_items,
+            total_pages,
+            has_next_page,
+            has_prev_page,
+        }
+    }
+}