refactor: convert SPA to multi-page architecture

- Add scene_onboarding.html, scene_dashboard.html, scene_settings.html
- Add onboarding.js, dashboard.js, settings.js scripts
- Update vite.config.js for multi-page build
- Navigation via window.location.href between pages
- Bottom nav bar on dashboard only

src-tauri/tauri.conf.json

@@ -0,0 +1,44 @@
+{
+  "$schema": "../node_modules/@tauri-apps/cli/config.schema.json",
+  "productName": "Chakmate",
+  "version": "1.0.0",
+  "identifier": "com.chakmate.desktop",
+  "build": {
+    "frontendDist": "../dist",
+    "devUrl": "http://localhost:5173",
+    "beforeDevCommand": "npm run dev",
+    "beforeBuildCommand": "npm run build"
+  },
+  "app": {
+    "withGlobalTauri": true,
+    "windows": [
+      {
+        "title": "Chakmate - 지능형 디지털 자산 관리",
+        "width": 1200,
+        "height": 800,
+        "minWidth": 900,
+        "minHeight": 600,
+        "center": true,
+        "resizable": true,
+        "fullscreen": false
+      }
+    ],
+    "security": {
+      "csp": null
+    }
+  },
+  "bundle": {
+    "active": true,
+    "targets": "all",
+    "icon": [
+      "icons/32x32.png",
+      "icons/128x128.png",
+      "icons/128x128@2x.png",
+      "icons/icon.icns",
+      "icons/icon.ico"
+    ],
+    "android": {
+      "debugApplicationIdSuffix": ".debug"
+    }
+  }
+}