feat: add live Codex research chat and reusable deck sources

src/features/research/research-deck-sync.ts

@@ -0,0 +1,41 @@
+import type { Deck, DeckView, Workspace } from '../decks/model'
+
+type WorkspaceActions = {
+  getWorkspace: () => Workspace
+  createTemporary: (title: string, columns: Deck['columns']) => DeckView
+  save: (deck: Deck) => Promise<boolean>
+  select: (id: string) => unknown
+}
+
+/** A generated plan owns a temporary view, never a user's saved deck. */
+export async function syncResearchDeck(
+  plan: Deck,
+  activate: boolean,
+  bindings: Map<string, string>,
+  workspace: WorkspaceActions,
+): Promise<void> {
+  const before = workspace.getWorkspace()
+  const previousActiveId = before.activeDeckId
+  const previousId = bindings.get(plan.id)
+  const existing = before.decks.find((deck) => deck.id === previousId)
+  let viewId: string
+  if (existing && !existing.persisted) {
+    if (!(await workspace.save({ ...plan, id: existing.id }))) {
+      throw new Error(
+        '一時デッキを更新できませんでした。保存処理の完了後に再試行してください。',
+      )
+    }
+    viewId = existing.id
+  } else {
+    viewId = workspace.createTemporary(plan.title, plan.columns).id
+    bindings.set(plan.id, viewId)
+  }
+  if (activate) {
+    workspace.select(viewId)
+  } else if (
+    previousId &&
+    workspace.getWorkspace().decks.some((deck) => deck.id === previousActiveId)
+  ) {
+    workspace.select(previousActiveId)
+  }
+}