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/subagent/tools.rs

@@ -0,0 +1,13 @@
+//! Subagent tool helpers — wrap tool execution for subagent use.
+
+use crate::tools::{Tool, ToolCtx};
+use anyhow::Result;
+
+/// Execute a single tool call within a subagent context.
+pub fn execute_tool_call(
+    tool: &dyn Tool,
+    ctx: &ToolCtx,
+    args: &serde_json::Value,
+) -> Result<String> {
+    tool.run(ctx, args)
+}