feat: initialize Tauri v2 + Vue 3 project

src/App.vue

@@ -0,0 +1,38 @@
+<script setup lang="ts">
+// Main App component - layout placeholder
+</script>
+
+<template>
+  <div class="h-full w-full flex flex-col bg-background">
+    <!-- TitleBar placeholder -->
+    <header class="h-10 flex items-center justify-between px-4 bg-surface border-b border-border" data-tauri-drag-region>
+      <div class="flex items-center gap-2">
+        <span class="text-amber font-semibold">ZeroClock</span>
+      </div>
+      <div class="flex items-center gap-2">
+        <!-- Window controls would go here -->
+      </div>
+    </header>
+
+    <!-- TimerBar placeholder -->
+    <div class="h-16 flex items-center justify-center bg-surface border-b border-border">
+      <span class="text-text-secondary">Timer Bar Placeholder</span>
+    </div>
+
+    <!-- Main content area -->
+    <div class="flex-1 flex overflow-hidden">
+      <!-- Sidebar placeholder -->
+      <aside class="w-16 flex flex-col items-center py-4 bg-surface border-r border-border">
+        <div class="text-text-secondary text-sm">Sidebar</div>
+      </aside>
+
+      <!-- Main content -->
+      <main class="flex-1 p-6 overflow-auto">
+        <router-view />
+      </main>
+    </div>
+  </div>
+</template>
+
+<style scoped>
+</style>