feat(frontend): add Vue 3 web application

- Add Vue 3 + TypeScript + Pinia setup
- Add 6 complete views: Dashboard, Queue, Scanner, Rules, Workers, Settings
- Add Pinia stores for state management
- Add API service with Axios client
- Add dark theme with Tdarr-inspired styling
- Add setup wizard component
- Add path browser for filesystem navigation

frontend/src/stores/config.ts

@@ -0,0 +1,47 @@
+import { defineStore } from 'pinia'
+import { ref, computed } from 'vue'
+import axios from 'axios'
+
+export const useConfigStore = defineStore('config', () => {
+  const operationMode = ref<'standalone' | 'bazarr_slave'>('standalone')
+  const hasGPU = ref(false)
+  const loading = ref(false)
+
+  const isStandalone = computed(() => operationMode.value === 'standalone')
+  const isBazarrSlave = computed(() => operationMode.value === 'bazarr_slave')
+
+  async function fetchConfig() {
+    loading.value = true
+    try {
+      // Get operation mode from settings
+      const response = await axios.get('/api/settings/operation_mode')
+      operationMode.value = response.data.value === 'bazarr_slave' ? 'bazarr_slave' : 'standalone'
+    } catch (error) {
+      console.error('Failed to fetch operation mode:', error)
+    } finally {
+      loading.value = false
+    }
+  }
+
+  async function detectGPU() {
+    try {
+      // Try to get system resources to detect GPU
+      const response = await axios.get('/api/system/resources')
+      hasGPU.value = response.data.gpus && response.data.gpus.length > 0
+    } catch (error) {
+      // If endpoint doesn't exist, assume no GPU detection available
+      hasGPU.value = false
+    }
+  }
+
+  return {
+    operationMode,
+    hasGPU,
+    loading,
+    isStandalone,
+    isBazarrSlave,
+    fetchConfig,
+    detectGPU
+  }
+})
+