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/composables/useConnections.js

@@ -0,0 +1,32 @@
+export const useConnections = () => {
+  const getSuggestions = (params = {}) =>
+    $fetch('/api/connections/suggestions', { params })
+
+  const getMyConnections = () =>
+    $fetch('/api/connections')
+
+  const requestConnection = (recipientId) =>
+    $fetch('/api/connections', { method: 'POST', body: { recipientId } })
+
+  const confirmConnection = (id) =>
+    $fetch(`/api/connections/${id}/confirm`, { method: 'POST' })
+
+  const hideConnection = (id) =>
+    $fetch(`/api/connections/${id}/hide`, { method: 'POST' })
+
+  const withdrawConnection = (id) =>
+    $fetch(`/api/connections/${id}/withdraw`, { method: 'POST' })
+
+  const getPendingCount = () =>
+    $fetch('/api/connections/pending-count')
+
+  return {
+    getSuggestions,
+    getMyConnections,
+    requestConnection,
+    confirmConnection,
+    hideConnection,
+    withdrawConnection,
+    getPendingCount,
+  }
+}