feat(sessions): persist plugin state across runtimes

changelog.d/332.added.md

@@ -0,0 +1 @@
+Sessions now restore plugin state and todo lists across restarts in UI, SDK, ACP, print, and agent modes.

n00n-acp/src/lib.rs

@@ -6,7 +6,7 @@ pub mod translate;
 use std::path::PathBuf;
 use std::sync::Arc;
 
-use n00n_agent::headless::InteractiveHandle;
+use n00n_agent::headless::{InteractiveHandle, SessionStatePersistence};
 use n00n_agent::prompt::ResolvedSlots;
 use n00n_agent::{AgentConfig, PermissionsConfig};
 use n00n_providers::model::Model;
@@ -27,6 +27,7 @@ pub struct AcpParams {
     pub initial_wd: PathBuf,
     pub mcp_handle: Option<n00n_agent::McpHandle>,
     pub prompt_slots: Arc<ResolvedSlots>,
+    pub state_persistence: Option<Arc<dyn SessionStatePersistence>>,
     pub yolo: bool,
     pub session_daemon_register: Option<SessionDaemonRegister>,
 }

n00n-acp/src/server.rs

@@ -193,6 +193,7 @@ fn spawn_session(
         timeouts: params.timeouts,
         openai_options: params.openai_options,
         prompt_slots: Arc::clone(&params.prompt_slots),
+        state_persistence: params.state_persistence.clone(),
         excluded_tools: Vec::new(),
         mcp_handle: params.mcp_handle.clone(),
         initial_wd: cwd,