docs: add watchlist export/import implementation plans

docs/superpowers/plans/2026-05-06-watchlist-import-transaction.md

@@ -0,0 +1,20 @@
+# Watchlist Import Improvement Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Wrap the watchlist import loop in a transaction and log skipped rows.
+
+**Architecture:** Use `db.BeginTx` to start a transaction and ensure all operations within the loop use the transaction-aware `txQueries`.
+
+**Tech Stack:** Go, standard library `database/sql` and `log`.
+
+---
+
+### Task 1: Refactor ImportWatchlist to use Transaction
+
+**Files:**
+- Modify: `/Users/mkelvers/dev/personal/mal/api/watchlist/service.go`
+
+- [ ] **Step 1: Apply transaction wrapper and logging**
+
+- [ ] **Step 2: Commit changes**