Rename communityEcology → board across frontend, add Board nav, update redirects

- Add Board to exploreItems in AppNavigation
- Update ecology.vue + connections.vue redirects to /board
- Rename all communityEcology refs to board in member profiles, dashboard, admin, onboarding
- Update API path /api/members/me/community-ecology → /api/members/me/board

app/components/AppNavigation.vue

@@ -210,6 +210,7 @@ const youItems = [
 const exploreItems = [
   { label: "Events", path: "/events" },
   { label: "Members", path: "/members" },
+  { label: "Board", path: "/board" },
   { label: "Wiki", path: "https://wiki.ghostguild.org", external: true },
   { label: "About", path: "/about" },
 ];

app/components/OnboardingWidget.vue

@@ -66,7 +66,7 @@ const { goals, isComplete, currentSuggestion, trackGoal, loading } = useOnboardi
 
 const completedCount = computed(() => {
   const g = goals.value
-  return [g.hasProfileTags, g.hasVisitedEvent, g.hasEngagedEcology, g.hasClickedWiki]
+  return [g.hasProfileTags, g.hasVisitedEvent, g.hasEngagedBoard, g.hasClickedWiki]
     .filter(Boolean).length
 })