feat: refactor monolithic App.vue into modular Vue component architecture

- Extract 711-line App.vue into 15+ focused files across 5 directories
- Add data layer (icons, metrics, policies, auditTrail, requests)
- Add composables (useNavigation, useRequests, useChat, useToast)
- Add layout components (SidebarRail, TopBar, FilterBar)
- Add shared components (PanelHead, InfoRow, ToastNotification)
- Add business component (RequestTable) and 5 view components
- Extract global CSS to assets/styles/global.css
- Add start.sh with WSL/Windows cross-platform support
- Add .gitignore for node_modules, dist, and IDE dirs

src/views/RequestsView.vue

@@ -0,0 +1,20 @@
+<template>
+  <section class="view single">
+    <RequestTable :requests="filteredRequests" expanded @ask="emit('ask', $event)" @approve="emit('approve', $event)" @reject="emit('reject', $event)" />
+  </section>
+</template>
+
+<script setup>
+import RequestTable from '../components/business/RequestTable.vue'
+
+defineProps({
+  filteredRequests: { type: Array, required: true }
+})
+
+const emit = defineEmits(['ask', 'approve', 'reject'])
+</script>
+
+<style scoped>
+.view { display: grid; gap: 22px; animation: fadeUp 220ms var(--ease) both; }
+.view.single { max-width: 1120px; }
+</style>