Improve incremental review output and fix todo tracker race (#529)

* improve incremental review output and fix todo tracker race

- reviewed changes section: summarize at logical-change level with
  past-tense verbs, not per-file enumerations
- add TodoTracker.completeAll() to mark all non-cancelled items as
  completed before snapshotting the collapsible in review/progress posts

Made-with: Cursor

* completeAll -> completeInProgress: only mark in-progress items as completed

Pending items that were genuinely skipped stay as-is in the collapsible,
so the task list honestly reflects what the agent actually did.

Made-with: Cursor

utils/todoTracking.ts

@@ -56,6 +56,8 @@ export type TodoTracker = {
   cancel: () => void;
   /** resolves when any in-flight onUpdate call completes */
   settled: () => Promise<void>;
+  /** mark in-progress items as completed (for final snapshot before review/progress post) */
+  completeInProgress: () => void;
   renderCollapsible: () => string;
   readonly enabled: boolean;
   /** true after the tracker has successfully called onUpdate at least once */
@@ -135,6 +137,12 @@ export function createTodoTracker(onUpdate: (body: string) => Promise<void>): To
       await inflightPromise;
     },
 
+    completeInProgress() {
+      for (const item of state.values()) {
+        if (item.status === "in_progress") item.status = "completed";
+      }
+    },
+
     renderCollapsible(): string {
       if (state.size === 0) return "";
       const todos = Array.from(state.values());