feat(pi-turn-limit): add widget, /turn-limit command, and boundary confirmation

- Live widget showing Turns: {current}/{max}
- /turn-limit <N> command to change max turns mid-session
- Confirmation dialog at boundary turn (Yes resets counter, No aborts)
- Widget visible on session reload and fresh start

packages/pi-turn-limit/src/turn-limit.ts

@@ -36,12 +36,19 @@ export default function (pi: ExtensionAPI) {
   let turnCount = 0;
   let maxTurns = getMaxTurns();
 
+  pi.on("session_start", async (event, ctx) => {
+    // On reload, show the widget immediately
+    if (event.reason === "reload" && ctx.hasUI) {
+      ctx.ui.setWidget("turn-limit", [`Turns: ${turnCount}/${maxTurns}`]);
+    }
+  });
+
   pi.on("agent_start", async (_event, ctx) => {
     // Reset counter for each new user prompt
     turnCount = 0;
-    // Clear widget on new session
+    // Show initial widget state on fresh session
     if (ctx.hasUI) {
-      ctx.ui.setWidget("turn-limit", undefined);
+      ctx.ui.setWidget("turn-limit", [`Turns: ${turnCount}/${maxTurns}`]);
     }
   });