feat: Agent Orchestrator — multi-project agent dashboard

Tauri + Svelte 5 + Rust application for orchestrating multiple AI coding agents.
Includes Claude, Aider, Codex, and Ollama provider support, multi-agent
communication (btmsg/bttask), session anchors, plugin sandbox, FTS5 search,
Landlock sandboxing, and 507 vitest + 110 cargo tests.

src-tauri/src/commands/pty.rs

@@ -0,0 +1,33 @@
+use tauri::State;
+use crate::AppState;
+use crate::pty::PtyOptions;
+
+#[tauri::command]
+#[tracing::instrument(skip(state), fields(shell = ?options.shell))]
+pub fn pty_spawn(
+    state: State<'_, AppState>,
+    options: PtyOptions,
+) -> Result<String, String> {
+    state.pty_manager.spawn(options)
+}
+
+#[tauri::command]
+pub fn pty_write(state: State<'_, AppState>, id: String, data: String) -> Result<(), String> {
+    state.pty_manager.write(&id, &data)
+}
+
+#[tauri::command]
+pub fn pty_resize(
+    state: State<'_, AppState>,
+    id: String,
+    cols: u16,
+    rows: u16,
+) -> Result<(), String> {
+    state.pty_manager.resize(&id, cols, rows)
+}
+
+#[tauri::command]
+#[tracing::instrument(skip(state))]
+pub fn pty_kill(state: State<'_, AppState>, id: String) -> Result<(), String> {
+    state.pty_manager.kill(&id)
+}