feat(tui): add usage overlay and sidebar for displaying usage statistics and tasks

feat(tui): implement status bar with connection and turn state indicators
feat(tui): create workflow panel for agent status and progress visualization
feat(web): introduce web frontend interface with static file serving
feat(ws): add WebSocket interface for real-time communication and session management

apps/infrastructure/src/bgbash/control.rs

@@ -0,0 +1,54 @@
+//! Background bash control — list, cancel, and inspect background processes.
+
+use std::collections::HashMap;
+use std::sync::{Arc, Mutex};
+
+use super::job::BashJob;
+
+/// Central registry of all running background bash jobs.
+pub struct BashControl {
+    jobs: Mutex<HashMap<String, Arc<BashJob>>>,
+}
+
+impl BashControl {
+    pub fn new() -> Self {
+        BashControl {
+            jobs: Mutex::new(HashMap::new()),
+        }
+    }
+
+    /// Register a new background job.
+    pub fn register(&self, job: Arc<BashJob>) {
+        if let Ok(mut guard) = self.jobs.lock() {
+            guard.insert(job.id.clone(), job);
+        }
+    }
+
+    /// Cancel a job by ID.
+    pub fn cancel(&self, id: &str) -> bool {
+        if let Ok(mut guard) = self.jobs.lock() {
+            if let Some(job) = guard.remove(id) {
+                job.cancel();
+                return true;
+            }
+        }
+        false
+    }
+
+    /// List all active jobs.
+    pub fn list(&self) -> Vec<(String, String, bool)> {
+        let mut guard = self.jobs.lock().unwrap();
+        guard.retain(|_, j| j.is_running());
+        guard
+            .iter()
+            .map(|(id, job)| (id.clone(), job.command.clone(), job.is_running()))
+            .collect()
+    }
+
+    /// Clean up completed jobs.
+    pub fn prune(&self) {
+        if let Ok(mut guard) = self.jobs.lock() {
+            guard.retain(|_, j| j.is_running());
+        }
+    }
+}