memory tools: forward to daemon when not in daemon process

Add STORE_HANDLE global that daemon sets at startup. When set, tools
access store directly. When unset (external process), tools forward
to daemon via MCP socket.

This allows consciousness-claude and poc-memory to import and call
memory tools directly - they'll automatically route through the
daemon socket.

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

src/user/mod.rs

@@ -212,6 +212,12 @@ async fn start(cli: crate::user::CliArgs) -> Result<()> {
         })
         .expect("spawn UI thread");
 
+    // Initialize store and set global handle for memory tools
+    match crate::store::Store::cached().await {
+        Ok(store) => crate::agent::tools::memory::set_store(store),
+        Err(e) => eprintln!("Store init failed: {}", e),
+    }
+
     // Start MCP server for external tool access
     let mut tools: Vec<crate::agent::tools::Tool> = Vec::new();
     tools.extend(crate::agent::tools::memory::memory_tools());