fix: remove auto-proceed fake user message injection from agent loop (#255)

The agentic loop injected fake user messages ("Please proceed and use
the available tools to complete this task.") when the LLM responded
with text instead of tool calls. This caused hallucinated conversations
during casual chat, 3x wasted LLM calls, and trust issues.

Remove the `resume_after_tool` parameter and `tools_executed` tracking
entirely. Text responses now return immediately, trusting the LLM to
decide when tools are needed (consistent with ZeroClaw and OpenClaw).

Closes #145

Co-authored-by: Claude Opus 4.6 <[email protected]>

src/agent/thread_ops.rs

@@ -278,7 +278,7 @@ impl Agent {
 
         // Run the agentic tool execution loop
         let result = self
-            .run_agentic_loop(message, session.clone(), thread_id, turn_messages, false)
+            .run_agentic_loop(message, session.clone(), thread_id, turn_messages)
             .await;
 
         // Re-acquire lock and check if interrupted
@@ -1057,7 +1057,7 @@ impl Agent {
 
             // Continue the agentic loop (a tool was already executed this turn)
             let result = self
-                .run_agentic_loop(message, session.clone(), thread_id, context_messages, true)
+                .run_agentic_loop(message, session.clone(), thread_id, context_messages)
                 .await;
 
             // Handle the result