feat: add connections page, composable, nav badge, and peer-support redirect

- useConnections composable wrapping all /api/connections endpoints
- Connections page with suggestions, filters, and connection management
- Pending connection count badge in sidebar navigation
- peer-support.vue now redirects to /connections

app/pages/peer-support.vue

@@ -3,10 +3,10 @@
 </template>
 
 <script setup>
-// Redirect to members directory with peer support filter
+// Redirect to connections page
 definePageMeta({
   middleware: defineNuxtRouteMiddleware(() => {
-    return navigateTo("/members?peerSupport=true");
+    return navigateTo("/connections");
   }),
 });
 </script>