move Claude Code-specific code from thalamus/ to claude/

Separates the Claude-specific daemon (idle timer, tmux pane detection,
prompt injection, RPC server, session hooks) from the universal
infrastructure (channels, supervisor, notify, daemon protocol).

thalamus/ now contains only substrate-independent code: the channel
client/supervisor, notification system, daemon_capnp protocol, and
shared helpers (now(), home()).

claude/ contains: idle.rs, tmux.rs, context.rs, rpc.rs, config.rs,
hook.rs (moved from subconscious/), plus the daemon CLI and server
startup code from thalamus/mod.rs.

All re-exports preserved for backward compatibility.

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

src/session.rs

@@ -69,7 +69,7 @@ impl HookSession {
 
     /// Get the seen set for this session
     pub fn seen(&self) -> HashSet<String> {
-        super::subconscious::hook::load_seen(&self.state_dir, &self.session_id)
+        super::claude::hook::load_seen(&self.state_dir, &self.session_id)
     }
 
     /// Get transcript metadata, resolving the path if needed.