restore as a page (#87)

* feat: add custom restore target directory

Adds the ability to restore snapshots to a custom directory instead of
only the original path. Closes #12.

Changes:
- Add target parameter to restore API endpoint
- Add directory picker UI in file browser restore dialog
- Add target input field in snapshot restore form
- Create reusable PathSelector component

Note: Run `bun run gen:api-client` after merging to regenerate types.

* refactor: path selector design

* refactor: unify restore snapshot dialogs

* refactor: restore snapshot as a page

* chore: fix liniting issues

* chore(create-notification): remove un-used prop

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Co-authored-by: Deepseek1 <Deepseek1@users.noreply.github.com>

app/server/modules/lifecycle/checkpoint.ts

@@ -2,7 +2,6 @@ import { eq, sql } from "drizzle-orm";
 import { db } from "../../db/db";
 import { appMetadataTable, usersTable } from "../../db/schema";
 import { logger } from "../../utils/logger";
-import { REQUIRED_MIGRATIONS } from "~/server/core/constants";
 
 const MIGRATION_KEY_PREFIX = "migration:";