Kill StatusUpdate, Activity, DmnAnnotation, ContextInfoUpdate, AgentUpdate

Status bar reads directly from Agent and MindState on each render tick.
Activity is now a field on Agent — set by agent code directly, read by
UI via try_lock. DmnAnnotation, ContextInfoUpdate, AgentUpdate were
already dead (no senders).

UiMessage down to 4 variants: TextDelta, Reasoning, Debug, Info.

Co-Authored-By: Proof of Concept <poc@bcachefs.org>

src/user/chat.rs

@@ -602,31 +602,6 @@ impl InteractScreen {
                     self.autonomous.append_text(text);
                 }
             },
-            UiMessage::DmnAnnotation(text) => {
-                self.autonomous.push_line(text.clone(), Color::Yellow);
-                self.turn_started = Some(std::time::Instant::now());
-                self.needs_assistant_marker = true;
-                app.status.turn_tools = 0;
-            }
-            UiMessage::StatusUpdate(info) => {
-                if !info.dmn_state.is_empty() {
-                    app.status.dmn_state = info.dmn_state.clone();
-                    app.status.dmn_turns = info.dmn_turns;
-                    app.status.dmn_max_turns = info.dmn_max_turns;
-                }
-                if info.prompt_tokens > 0 { app.status.prompt_tokens = info.prompt_tokens; }
-                if !info.model.is_empty() { app.status.model = info.model.clone(); }
-                if !info.context_budget.is_empty() { app.status.context_budget = info.context_budget.clone(); }
-            }
-            UiMessage::Activity(text) => {
-                if text.is_empty() {
-                    self.call_started = None;
-                } else if app.activity.is_empty() || self.call_started.is_none() {
-                    self.call_started = Some(std::time::Instant::now());
-                    self.call_timeout_secs = crate::config::get().api_stream_timeout_secs;
-                }
-                app.activity = text.clone();
-            }
             UiMessage::Reasoning(text) => {
                 self.autonomous.current_color = Color::DarkGray;
                 self.autonomous.append_text(text);
@@ -637,8 +612,6 @@ impl InteractScreen {
             UiMessage::Info(text) => {
                 self.conversation.push_line(text.clone(), Color::Cyan);
             }
-            UiMessage::ContextInfoUpdate(info) => { app.context_info = Some(info.clone()); }
-            UiMessage::AgentUpdate(agents) => { app.agent_state = agents.clone(); }
             _ => {}
         }
     }
@@ -919,6 +892,22 @@ impl ScreenView for InteractScreen {
         // Sync state from agent
         self.sync_from_agent();
 
+        // Read status from agent + mind state
+        if let Ok(agent) = self.agent.try_lock() {
+            app.status.prompt_tokens = agent.last_prompt_tokens();
+            app.status.model = agent.model().to_string();
+            app.status.context_budget = agent.budget().status_string();
+            if !agent.activity.is_empty() {
+                app.activity = agent.activity.clone();
+            }
+        }
+        {
+            let mind = self.shared_mind.lock().unwrap();
+            app.status.dmn_state = mind.dmn.label().to_string();
+            app.status.dmn_turns = mind.dmn_turns;
+            app.status.dmn_max_turns = mind.max_dmn_turns;
+        }
+
         // Draw
         self.draw_main(frame, area, app);
         None

src/user/mod.rs

@@ -315,14 +315,6 @@ fn diff_mind_state(
     dirty: &mut bool,
 ) {
     if cur.dmn.label() != prev.dmn.label() || cur.dmn_turns != prev.dmn_turns {
-        let _ = ui_tx.send(UiMessage::StatusUpdate(ui_channel::StatusInfo {
-            dmn_state: cur.dmn.label().to_string(),
-            dmn_turns: cur.dmn_turns,
-            dmn_max_turns: cur.max_dmn_turns,
-            prompt_tokens: 0, completion_tokens: 0,
-            model: String::new(), turn_tools: 0,
-            context_budget: String::new(),
-        }));
         *dirty = true;
     }
     // Input consumed — Mind started a turn with it

src/user/ui_channel.rs

@@ -74,15 +74,6 @@ pub enum UiMessage {
     /// Streaming text delta — routed to conversation or autonomous pane.
     TextDelta(String, StreamTarget),
 
-    /// DMN state annotation: [dmn: foraging (3/20)].
-    DmnAnnotation(String),
-
-    /// Status bar update.
-    StatusUpdate(StatusInfo),
-
-    /// Live activity indicator for the status bar.
-    Activity(String),
-
     /// Reasoning/thinking tokens from the model (internal monologue).
     Reasoning(String),
 
@@ -92,11 +83,6 @@ pub enum UiMessage {
     /// Informational message — goes to conversation pane (command output, etc).
     Info(String),
 
-    /// Context loading details — stored for the debug screen.
-    ContextInfoUpdate(ContextInfo),
-
-    /// Agent cycle state update — refreshes the F2 agents screen.
-    AgentUpdate(Vec<crate::subconscious::subconscious::AgentSnapshot>),
 }
 
 /// Sender that fans out to both the TUI (mpsc) and observers (broadcast).
@@ -128,6 +114,3 @@ pub fn channel() -> (UiSender, UiReceiver) {
     let (observe_tx, _) = broadcast::channel(1024);
     (UiSender { tui: tui_tx, observe: observe_tx }, tui_rx)
 }
-
-/// Replay a restored session into the TUI panes so the user can see
-/// conversation history immediately on restart. Shows user input,