feat(journal): live AI status updates in entry cards via Postgres NOTIFY trigger + SSE ai_status events

db/migration.sql

@@ -184,3 +184,18 @@ FROM (
   FROM entry_photos ORDER BY entry_id, sort_order, id
 ) p
 WHERE e.photo_path IS NULL AND p.entry_id = e.id;
+
+CREATE OR REPLACE FUNCTION notify_entries_changed() RETURNS trigger AS $$
+BEGIN
+  IF (TG_OP = 'INSERT') THEN
+    PERFORM pg_notify('entries_changed', json_build_object('type', 'entry_created', 'id', NEW.id)::text);
+  ELSIF (TG_OP = 'UPDATE' AND OLD.ai_status IS DISTINCT FROM NEW.ai_status) THEN
+    PERFORM pg_notify('entries_changed', json_build_object('type', 'ai_status', 'id', NEW.id, 'status', NEW.ai_status, 'error', NEW.ai_error)::text);
+  END IF;
+  RETURN NULL;
+END;
+$$ LANGUAGE plpgsql;
+
+DROP TRIGGER IF EXISTS trg_entries_notify ON entries;
+CREATE TRIGGER trg_entries_notify AFTER INSERT OR UPDATE OF ai_status ON entries
+FOR EACH ROW EXECUTE FUNCTION notify_entries_changed();