fix(cli): improve /history display with consistent numbering

Fixes NousResearch#633

Problem:
- Sequential numbering gaps (e.g., NousResearch#1, NousResearch#2, NousResearch#5, NousResearch#8) confuse users
- 200 char truncation too aggressive
- Tool messages completely hidden with no indication

Fix:
1. Use separate counter for displayed messages only
2. Skip tool messages but show count at end
3. Skip system messages
4. Increase truncation to 300 chars
5. Display 'N tool messages hidden' summary

Impact:
- Consistent numbering: NousResearch#1, NousResearch#2, NousResearch#3, NousResearch#4
- Users know when tool calls occurred
- More context visible per message

Author: JasonOA888

cli.py

@@ -1612,17 +1612,36 @@ def show_history(self):
         print("|" + " " * 12 + "(^_^) Conversation History" + " " * 11 + "|")
         print("+" + "-" * 50 + "+")
 
-        for i, msg in enumerate(self.conversation_history, 1):
+        # Use separate counter for displayed messages (not enumerate over all)
+        display_num = 0
+        tool_count = 0
+        
+        for msg in self.conversation_history:
             role = msg.get("role", "unknown")
             content = msg.get("content") or ""
 
+            # Skip tool messages but count them
+            if role == "tool":
+                tool_count += 1
+                continue
+            
+            # Skip system messages
+            if role == "system":
+                continue
+            
+            display_num += 1
+            
             if role == "user":
-                print(f"\n  [You #{i}]")
-                print(f"    {content[:200]}{'...' if len(content) > 200 else ''}")
+                print(f"\n  [You #{display_num}]")
+                print(f"    {content[:300]}{'...' if len(content) > 300 else ''}")
             elif role == "assistant":
-                print(f"\n  [Hermes #{i}]")
-                preview = content[:200] if content else "(tool calls)"
-                print(f"    {preview}{'...' if len(str(content)) > 200 else ''}")
+                print(f"\n  [Hermes #{display_num}]")
+                preview = content[:300] if content else "(tool calls)"
+                print(f"    {preview}{'...' if len(str(content)) > 300 else ''}")
+        
+        # Show summary of hidden tool messages
+        if tool_count > 0:
+            print(f"\n  [dim]{tool_count} tool message(s) hidden[/]")
 
         print()