fix: Wire automation toggles, browse uMod, and error feedback across admin views

- ServerView: automation toggles (crash recovery, auto-update, force wipe eligible)
  now call updateConfig() on click with toast success/error; all catch blocks get
  toast feedback instead of silent swallow
- PluginsView: Browse uMod tab wired to /plugins/search backend endpoint with
  debounced search, results table, and Install button that calls installPlugin();
  shows install state and marks already-installed plugins
- WipesView: dry-run results now displayed in a collapsible panel (would_delete /
  would_preserve lists + estimated duration); schedule enable/disable toggle wired
  to PUT /wipes/schedules/:id with loading state and toast feedback
- AnalyticsView: catch blocks now show toast errors instead of console.log;
  Player Retention placeholder replaced with intentional placeholder cards
- TeamView, ChatLogView, PlayersView, NotificationsView, MapsView: all empty
  catch blocks and '// API not wired yet' comments replaced with toast.error()
  calls; Notifications save now shows success toast

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/views/admin/NotificationsView.vue

@@ -1,10 +1,12 @@
 <script setup lang="ts">
 import { ref, onMounted } from 'vue'
 import { useApi } from '@/composables/useApi'
+import { useToastStore } from '@/stores/toast'
 import type { NotificationConfig } from '@/types'
 import { Bell, Save, Loader2 } from 'lucide-vue-next'
 
 const api = useApi()
+const toast = useToastStore()
 
 const config = ref<NotificationConfig>({
   discord_webhook_url: null,
@@ -38,7 +40,7 @@ async function fetchConfig() {
     const data = await api.get<{ config: NotificationConfig }>('/notifications/config')
     config.value = data.config
   } catch {
-    // API not wired yet
+    toast.error('Failed to load notification settings')
   } finally {
     isLoading.value = false
   }
@@ -48,8 +50,9 @@ async function saveConfig() {
   saving.value = true
   try {
     await api.put('/notifications/config', config.value)
+    toast.success('Notification settings saved')
   } catch {
-    // Handle error
+    toast.error('Failed to save notification settings')
   } finally {
     saving.value = false
   }