feat: add shared decks and multi-account Mastodon OAuth

src/features/decks/legacy-import.ts

@@ -0,0 +1,32 @@
+import { z } from 'zod'
+import { columnSchema, deckSchema, MAX_COLUMNS } from './model'
+
+export const LEGACY_STORAGE_KEY = 'twitter-lite-research-deck'
+const legacyColumn = columnSchema
+  .omit({ connectionId: true })
+  .extend({ profileName: z.string().min(1) })
+const legacyDeck = z
+  .object({
+    id: deckSchema.shape.id,
+    title: deckSchema.shape.title,
+    columns: z.array(legacyColumn).max(MAX_COLUMNS),
+  })
+  .strict()
+  .refine(
+    (deck) =>
+      new Set(deck.columns.map((column) => column.id)).size ===
+      deck.columns.length,
+    'カラム ID が重複しています。',
+  )
+export const legacyWorkspaceSchema = z
+  .object({
+    version: z.literal(2),
+    activeDeckId: z.string(),
+    decks: z.array(legacyDeck).min(1).max(100),
+  })
+  .strict()
+  .refine(
+    (value) =>
+      new Set(value.decks.map((deck) => deck.id)).size === value.decks.length,
+    'デッキ ID が重複しています。',
+  )