feat(#2569): DB-backed per-agent todo store + mcp.sock upsert/clear/list/mark-done ops

hive-c0re/src/coordinator.rs

@@ -16,6 +16,7 @@ use crate::container_view::{self, ContainerView};
 use crate::dashboard_events::DashboardEvent;
 use crate::operator_questions::OperatorQuestions;
 use crate::socket_server::{self, AgentSocket};
+use crate::todos::Todos;
 
 /// Capacity of the dashboard event channel. Slow browser subscribers
 /// (idle tab, throttled connection) drop frames past this — that's
@@ -32,6 +33,11 @@ pub struct Coordinator {
     pub broker: Arc<Broker>,
     pub approvals: Arc<Approvals>,
     pub questions: Arc<OperatorQuestions>,
+    /// Dynamic, subsystem-pushed todos (loose-ends v2, #2569). In-agent
+    /// subsystems (matrix, forge, bash) upsert/clear todos over mcp.sock
+    /// instead of firing wakes directly; `get_todos` merges these with
+    /// the computed static loose ends.
+    pub todos: Arc<Todos>,
     /// Scheduled-prompts queue. One sqlite connection,
     /// internal mutex; the worker drains due rows and the manager
     /// handlers insert / cancel through the same handle.
@@ -460,6 +466,7 @@ impl Coordinator {
         let broker = Broker::open(db_path).context("open broker")?;
         let approvals = Approvals::open(db_path).context("open approvals")?;
         let questions = OperatorQuestions::open(db_path).context("open operator_questions")?;
+        let todos = Todos::open(db_path).context("open todos")?;
         let scheduled_prompts = crate::scheduled_prompts::ScheduledPrompts::open(db_path)
             .context("open scheduled_prompts")?;
         // BuildLogs wants a directory (it picks its own `build_logs.sqlite`
@@ -489,6 +496,7 @@ impl Coordinator {
             broker: Arc::new(broker),
             approvals: Arc::new(approvals),
             questions: Arc::new(questions),
+            todos: Arc::new(todos),
             scheduled_prompts: Arc::new(scheduled_prompts),
             build_logs,
             audit_log,