refactor(community): rename Community Connections → Community Ecology

Simplify the feature to pure discovery (filter by topic, see matching
members, copy Slack handle). Drop the connection request/confirm flow
entirely — Connection model, 7 API endpoints, useConnections composable,
and TagInput component deleted.

- Rename communityConnections → communityEcology in schema, API, pages
- Delete legacy fields: offering, lookingFor, peerSupport
- New /ecology page, /api/ecology/suggestions, community-ecology.patch
- Nav: "Connections" → "Ecology", remove pending-count badge
- Fix auth/member.get.js missing craftTags + communityEcology
- Add community_ecology_updated activity log type
- Expose slackHandle conditionally when offerPeerSupport is true
- Add migration script at scripts/migrate-to-ecology.js (run before deploy)

server/utils/activityLog.js

@@ -17,6 +17,7 @@ export const ACTIVITY_TYPES = {
   SLACK_INVITED: 'slack_invited',
   EMAIL_SENT: 'email_sent',
   COMMUNITY_CONNECTIONS_UPDATED: 'community_connections_updated',
+  COMMUNITY_ECOLOGY_UPDATED: 'community_ecology_updated',
   CONNECTION_REQUESTED: 'connection_requested',
   CONNECTION_CONFIRMED: 'connection_confirmed',
   TAG_SUGGESTED: 'tag_suggested'
@@ -39,6 +40,7 @@ export const ACTIVITY_TYPE_DEFAULTS = {
   slack_invited: 'admin',
   email_sent: 'member',
   community_connections_updated: 'member',
+  community_ecology_updated: 'member',
   connection_requested: 'member',
   connection_confirmed: 'member',
   tag_suggested: 'member'