Merge pull request #102 from ArnasDon/chore/changelog-migration-note

docs: add CHANGELOG with migration-required note

CHANGELOG.md

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+# Changelog
+
+User-visible changes in `wacrm`. Self-hosters: when pulling an update,
+check this file for any **migration required** notes and apply the
+matching SQL files from `supabase/migrations/` against your Supabase
+project before restarting the app.
+
+Versions follow [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
+
+## Unreleased
+
+### Added
+
+- Chat actions in the inbox: emoji reactions, reply-with-quote, and
+  copy-text on individual messages. Hover on desktop, long-press on
+  touch. Outbound reactions and replies forward to WhatsApp via the
+  Cloud API; inbound reactions and swipe-replies from customers arrive
+  through the webhook and appear in real time.
+
+### Migration required
+
+- Apply `supabase/migrations/009_message_actions.sql` to your Supabase
+  project. It adds `messages.reply_to_message_id` and the new
+  `message_reactions` table (with RLS and realtime). The migration is
+  idempotent — safe to re-run.
+
+### Changed
+
+- The webhook no longer stores inbound customer reactions as fake text
+  messages. They are written to `message_reactions` instead, so any
+  custom queries that counted reactions as messages will need updating.