Tweak history: load up to 500 instead 1000, skip empty chats

Author: jahooma

cli/src/components/chat-history-screen.tsx

@@ -17,7 +17,7 @@ const LAYOUT = {
   NARROW_WIDTH_THRESHOLD: 70, // Hide buttons when terminal width is below this
   MAIN_CONTENT_PADDING: 2,
   INITIAL_CHATS: 25, // Load this many immediately for fast display
-  BACKGROUND_CHATS: 975, // Load this many more in the background for search
+  BACKGROUND_CHATS: 475, // Load this many more in the background for search
   MAX_RENDERED_CHATS: 100, // Only render this many in the list
   TIME_COL_WIDTH: 12, // e.g., "2 hours ago"
   MSGS_COL_WIDTH: 8, // e.g., "99 msgs"

cli/src/utils/chat-history.ts

@@ -89,12 +89,15 @@ export function getAllChats(maxChats: number = 500): ChatHistoryEntry[] {
           lastPrompt = getFirstUserPrompt(messages)
         }
 
-        chats.push({
-          chatId: info.chatId,
-          lastPrompt,
-          timestamp: info.mtime,
-          messageCount,
-        })
+        // Skip empty chats (no messages)
+        if (messageCount > 0) {
+          chats.push({
+            chatId: info.chatId,
+            lastPrompt,
+            timestamp: info.mtime,
+            messageCount,
+          })
+        }
       } catch (error) {
         logger.debug(
           { chatId: info.chatId, error: error instanceof Error ? error.message : String(error) },