WIP: Agent/AgentState — 36 errors remaining, all .lock() → .state.lock() or .context.lock()

Bulk replaced Arc<Mutex<Agent>> with Arc<Agent> across all files.
Fixed control.rs, memory.rs tool handlers. Fixed oneshot Backend.
Remaining errors are all agent.lock() → agent.state.lock() or
agent.context.lock() in mind/, user/, and a few in mod.rs.

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

src/subconscious/digest.rs

@@ -602,7 +602,7 @@ fn str_err<T>(r: Result<T, String>) -> anyhow::Result<T> {
 
 /// digest_daily tool handler: generate a daily digest
 async fn handle_digest_daily(
-    _agent: Option<std::sync::Arc<tokio::sync::Mutex<super::super::agent::Agent>>>,
+    _agent: Option<std::sync::Arc<super::super::agent::Agent>>,
     args: serde_json::Value,
 ) -> anyhow::Result<String> {
     let date = str_err(get_str_required(&args, "date"))?;
@@ -613,7 +613,7 @@ async fn handle_digest_daily(
 
 /// digest_weekly tool handler: generate a weekly digest
 async fn handle_digest_weekly(
-    _agent: Option<std::sync::Arc<tokio::sync::Mutex<super::super::agent::Agent>>>,
+    _agent: Option<std::sync::Arc<super::super::agent::Agent>>,
     args: serde_json::Value,
 ) -> anyhow::Result<String> {
     let week_label = str_err(get_str_required(&args, "week"))?;
@@ -624,7 +624,7 @@ async fn handle_digest_weekly(
 
 /// digest_monthly tool handler: generate a monthly digest
 async fn handle_digest_monthly(
-    _agent: Option<std::sync::Arc<tokio::sync::Mutex<super::super::agent::Agent>>>,
+    _agent: Option<std::sync::Arc<super::super::agent::Agent>>,
     args: serde_json::Value,
 ) -> anyhow::Result<String> {
     let month = str_err(get_str_required(&args, "month"))?;
@@ -635,7 +635,7 @@ async fn handle_digest_monthly(
 
 /// digest_auto tool handler: auto-generate all missing digests
 async fn handle_digest_auto(
-    _agent: Option<std::sync::Arc<tokio::sync::Mutex<super::super::agent::Agent>>>,
+    _agent: Option<std::sync::Arc<super::super::agent::Agent>>,
     _args: serde_json::Value,
 ) -> anyhow::Result<String> {
     let mut store = str_err(Store::load())?;
@@ -645,7 +645,7 @@ async fn handle_digest_auto(
 
 /// digest_links tool handler: parse and apply digest links
 async fn handle_digest_links(
-    _agent: Option<std::sync::Arc<tokio::sync::Mutex<super::super::agent::Agent>>>,
+    _agent: Option<std::sync::Arc<super::super::agent::Agent>>,
     _args: serde_json::Value,
 ) -> anyhow::Result<String> {
     let mut store = str_err(Store::load())?;

src/subconscious/learn.rs

@@ -330,7 +330,7 @@ pub async fn score_memories_incremental<F, Fut>(
     max_age_secs: i64,
     response_window: usize,
     client: &ApiClient,
-    agent: &std::sync::Arc<tokio::sync::Mutex<crate::agent::Agent>>,
+    agent: &std::sync::Arc<crate::agent::Agent>,
     mut on_score: F,
 ) -> anyhow::Result<usize>
 where