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/review/pending.rs

@@ -0,0 +1,43 @@
+//! Pending review queue — tracks files modified by tools that have not
+//! yet been reviewed.
+
+use std::collections::VecDeque;
+
+/// A file mutation awaiting review.
+#[derive(Debug, Clone)]
+pub struct PendingReview {
+    pub path: String,
+    pub tool: String,
+    pub reason: String,
+    pub content_sha256: String,
+}
+
+/// Queue of files modified but not yet reviewed.
+#[derive(Debug, Clone, Default)]
+pub struct PendingReviewQueue {
+    entries: VecDeque<PendingReview>,
+}
+
+impl PendingReviewQueue {
+    pub fn new() -> Self {
+        PendingReviewQueue {
+            entries: VecDeque::new(),
+        }
+    }
+
+    pub fn push(&mut self, entry: PendingReview) {
+        self.entries.push_back(entry);
+    }
+
+    pub fn pop(&mut self) -> Option<PendingReview> {
+        self.entries.pop_front()
+    }
+
+    pub fn is_empty(&self) -> bool {
+        self.entries.is_empty()
+    }
+
+    pub fn len(&self) -> usize {
+        self.entries.len()
+    }
+}