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/cli/admin.rs

@@ -40,7 +40,7 @@ pub fn cmd_init() -> Result<(), String> {
     println!("Indexed {} memory units", count);
 
     // Install hooks
-    crate::subconscious::hook::install_hook()?;
+    crate::claude::hook::install_hook()?;
 
     // Create config if none exists
     let config_path = std::env::var("POC_MEMORY_CONFIG")