# Lint & type fixes (exactOptionalPropertyTypes)

**Problem:** TypeScript strict optional props and nostr-tools API differences caused `npm run type-check` and `next lint` to fail.

**Impact:** Build blocked (exact optional props errors, nostr-tools signing types), lint blocked (`max-lines-per-function`, `prefer-const`).

**Root cause:** Code was written against older nostr-tools typings and passed `undefined` into optional props under `exactOptionalPropertyTypes`.

**Corrections (code):**
- Normalized optional props handling (conditional spreads) across editor, fields, notifications, storage, markdown rendering.
- Added safe category handling for article drafts; tightened defaults and guards.
- Aligned signing with nostr-tools 1.17.0 (explicit `pubkey`/`created_at`, hash/sign helpers).
- Fixed async return contracts, removed unused params, and satisfied lint structure rules.
- Kept storage and notification payloads free of `undefined` fields; guarded link rendering.

**Modifications (files):** `components/ArticleEditor*.tsx`, `components/ArticleField.tsx`, `components/UserArticles.tsx`, `components/CategorySelect.tsx`, `lib/{nostr,nostrRemoteSigner,nostrconnect,articlePublisher,articleStorage,markdownRenderer,notifications,zapVerification}.ts`, `hooks/useArticles.ts`, `hooks/useUserArticles.ts`, `types/nostr-tools-extended.ts`, `package.json` (nostr-tools 1.17.0).

**Deployment:** No special steps; run `npm run lint && npm run type-check` (already clean).

**Analysis:** Ensured strict optional handling without fallbacks, restored compatibility with stable nostr-tools API, and kept functions within lint boundaries.