Rename Foundry handoffs to tasks (#239)

* Restore foundry onboarding stack

* Consolidate foundry rename

* Create foundry tasks without prompts

* Rename Foundry handoffs to tasks

foundry/packages/frontend/src/features/tasks/model.ts

@@ -0,0 +1,50 @@
+import type { TaskRecord } from "@sandbox-agent/foundry-shared";
+
+export interface RepoGroup {
+  repoId: string;
+  repoRemote: string;
+  tasks: TaskRecord[];
+}
+
+export function groupTasksByRepo(tasks: TaskRecord[]): RepoGroup[] {
+  const groups = new Map<string, RepoGroup>();
+
+  for (const task of tasks) {
+    const group = groups.get(task.repoId);
+    if (group) {
+      group.tasks.push(task);
+      continue;
+    }
+
+    groups.set(task.repoId, {
+      repoId: task.repoId,
+      repoRemote: task.repoRemote,
+      tasks: [task],
+    });
+  }
+
+  return Array.from(groups.values())
+    .map((group) => ({
+      ...group,
+      tasks: [...group.tasks].sort((a, b) => b.updatedAt - a.updatedAt),
+    }))
+    .sort((a, b) => {
+      const aLatest = a.tasks[0]?.updatedAt ?? 0;
+      const bLatest = b.tasks[0]?.updatedAt ?? 0;
+      if (aLatest !== bLatest) {
+        return bLatest - aLatest;
+      }
+      return a.repoRemote.localeCompare(b.repoRemote);
+    });
+}
+
+export function formatDiffStat(diffStat: string | null | undefined): string {
+  const normalized = diffStat?.trim();
+  if (!normalized) {
+    return "-";
+  }
+  if (normalized === "+0/-0" || normalized === "+0 -0" || normalized === "0 files changed") {
+    return "No changes";
+  }
+  return normalized;
+}