feat: smart search response includes start_frame/end_frame/fps, add limit param

src/core/db/postgres_db.rs

@@ -759,6 +759,9 @@ pub struct PostgresCache {
 pub struct SemanticSearchResult {
     pub id: i32,
     pub scene_order: i32,
+    pub start_frame: i64,
+    pub end_frame: i64,
+    pub fps: f64,
     pub start_time: f64,
     pub end_time: f64,
     pub summary: String,
@@ -2000,11 +2003,13 @@ impl PostgresDb {
         let results = sqlx::query_as::<_, SemanticSearchResult>(
             &format!(
                 "SELECT \
-                    id, id as scene_order, start_time, end_time, \
-                    COALESCE(summary_text, text_content, '') as summary, \
-                    metadata, \
-                    (1 - (embedding <=> $1::vector)) as similarity \
-                FROM {} \
+                     id, id as scene_order, \
+                     (start_time * fps)::bigint as start_frame, (end_time * fps)::bigint as end_frame, \
+                     fps, start_time, end_time, \
+                     COALESCE(summary_text, text_content, '') as summary, \
+                     metadata, \
+                     (1 - (embedding <=> $1::vector)) as similarity \
+                 FROM {} \
                 WHERE file_uuid = $2 AND chunk_type IN ('story_parent', 'llm_parent') AND embedding IS NOT NULL \
                 ORDER BY embedding <=> $1::vector \
                 LIMIT $3",