poc-daemon: reset nudge timer on tool use, move nudge interval to claude

PostToolUse now signals response activity so the nudge timer resets
while I'm actively working. Nudge interval constant moved from
thalamus (where it doesn't belong) to consciousness-claude.

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

src/idle.rs

@@ -177,8 +177,9 @@ impl State {
         if self.inner.in_turn { return Ok(()); }
 
         // Min nudge interval
+        const NUDGE_INTERVAL: f64 = 60.0;
         let since_nudge = t - self.inner.last_nudge;
-        if since_nudge < thalamus_idle::MIN_NUDGE_INTERVAL { return Ok(()); }
+        if since_nudge < NUDGE_INTERVAL { return Ok(()); }
 
         // Idle timeout check
         if !self.inner.should_go_idle() { return Ok(()); }

src/poc-hook.rs

@@ -260,6 +260,7 @@ fn main() {
             }
         }
         "PostToolUse" => {
+            signal_response();
             print!("{}", memory_search::run_hook(&input));
 
             if let Some(ref t) = transcript {