feat: Enhance token usage tracking and improve chat UI with emojis

src/app/runtime/actions/mod.rs

@@ -1125,9 +1125,22 @@ fn run_agent_turn(
              Remember: Cycle 0 MUST be investigation-only (access: read). Cycle 1 MUST be planning-only (access: read). Only subsequent cycles can perform modifications (access: write/full)."
         ));
 
+        let planner_prompt_chars = system_msg.content.as_deref().map_or(0, str::len)
+            + user_msg.content.as_deref().map_or(0, str::len);
         let planner_result = tc.client.chat_with_tools_non_streaming(&[system_msg, user_msg], None);
         let pipeline_result = match planner_result {
-            Ok((reply, _)) => {
+            Ok((reply, usage_opt)) => {
+                let (mut tok_in, mut tok_out) = usage_opt.unwrap_or((0, 0));
+                if tok_in == 0 {
+                    tok_in = (planner_prompt_chars / 4).max(1) as u64;
+                }
+                if tok_out == 0 {
+                    let response_chars = reply.content.as_deref().map_or(0, str::len);
+                    tok_out = (response_chars / 4).max(1) as u64;
+                }
+                if let Ok(mut q) = events_q.lock() {
+                    q.push_back(TurnEvent::Usage { tokens_in: tok_in, tokens_out: tok_out });
+                }
                 let reply_text = reply.content.as_deref().unwrap_or("").trim();
                 let clean_json = if reply_text.starts_with("```") {
                     let mut lines = reply_text.lines();
@@ -1350,7 +1363,18 @@ fn run_agent_turn(
             }
         };
 
-        let (tok_in, tok_out) = final_usage.unwrap_or((0, 0));
+        let (mut tok_in, mut tok_out) = final_usage.unwrap_or((0, 0));
+        if tok_in == 0 {
+            let total_chars: usize = wire_msgs.iter()
+                .filter_map(|m| m.content.as_deref())
+                .map(str::len)
+                .sum();
+            tok_in = (total_chars / 4).max(1) as u64;
+        }
+        if tok_out == 0 {
+            let response_chars = response.content.as_deref().map_or(0, str::len);
+            tok_out = (response_chars / 4).max(1) as u64;
+        }
         if let Ok(mut q) = events_q.lock() {
             q.push_back(TurnEvent::Usage { tokens_in: tok_in, tokens_out: tok_out });
         }