Extract ecology view into standalone /board page, simplify members to directory-only

- Create app/pages/board.vue with ecology suggestions, tag filtering, clipboard
- Create app/composables/useBoard.js (calls /api/board/suggestions)
- Delete app/composables/useEcology.js
- Strip all ecology code from members/index.vue (view toggle, ecology state,
  ecology template, ecology styles, conditional computeds)

app/composables/useBoard.js

@@ -0,0 +1,6 @@
+export const useBoard = () => {
+  const getSuggestions = (params = {}) =>
+    $fetch('/api/board/suggestions', { params })
+
+  return { getSuggestions }
+}

app/composables/useEcology.js

@@ -1,6 +0,0 @@
-export const useEcology = () => {
-  const getSuggestions = (params = {}) =>
-    $fetch('/api/ecology/suggestions', { params })
-
-  return { getSuggestions }
-}