Subconscious screen: show AutoAgent state

F3 screen now displays SubconsciousSnapshot from Mind's AutoAgents
instead of the old process-based AgentSnapshot. Shows running status
(phase + turn), last run time, and walked key count.

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

src/mind/mod.rs

@@ -91,6 +91,30 @@ impl SubconsciousAgent {
     }
 }
 
+/// Lightweight snapshot of subconscious agent state for the TUI.
+#[derive(Clone, Default)]
+pub struct SubconsciousSnapshot {
+    pub name: String,
+    pub running: bool,
+    pub current_phase: String,
+    pub turn: usize,
+    pub walked_count: usize,
+    pub last_run_secs_ago: Option<f64>,
+}
+
+impl SubconsciousAgent {
+    fn snapshot(&self) -> SubconsciousSnapshot {
+        SubconsciousSnapshot {
+            name: self.auto.name.clone(),
+            running: self.is_running(),
+            current_phase: self.auto.current_phase.clone(),
+            turn: self.auto.turn,
+            walked_count: self.auto.walked.len(),
+            last_run_secs_ago: self.last_run.map(|t| t.elapsed().as_secs_f64()),
+        }
+    }
+}
+
 /// Which pane streaming text should go to.
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum StreamTarget {
@@ -316,6 +340,10 @@ impl Mind {
     }
 
     /// Initialize — restore log, start daemons and background agents.
+    pub async fn subconscious_snapshots(&self) -> Vec<SubconsciousSnapshot> {
+        self.subconscious.lock().await.iter().map(|s| s.snapshot()).collect()
+    }
+
     pub async fn init(&self) {
         // Restore conversation
         let mut ag = self.agent.lock().await;