feat: add global styles and transitions for dark mode support

- Created style.css for base styles and color variables for light and dark themes.
- Added tailwind.css for Tailwind CSS integration and custom theme variables.
- Introduced transitions.css to manage global transitions and reduce motion preferences.
- Updated tsconfig.app.json to include path aliases for easier imports.
- Modified tsconfig.json to set baseUrl and paths for module resolution.
- Added typed-router.d.ts for auto-generated route types.
- Enhanced vite.config.ts with Vue Router plugin, Tailwind CSS integration, and server proxy settings.

frontend/typed-router.d.ts

@@ -0,0 +1,32 @@
+/* eslint-disable */
+/* prettier-ignore */
+// @ts-nocheck
+// Generated by unplugin-vue-router. ‼️ DO NOT MODIFY THIS FILE ‼️
+// It's recommended to commit this file.
+// Make sure to add this file to your tsconfig.json file as an "includes" or "files" entry.
+
+declare module 'vue-router/auto-routes' {
+  import type {
+    RouteRecordInfo,
+    ParamValue,
+    ParamValueOneOrMore,
+    ParamValueZeroOrMore,
+    ParamValueZeroOrOne,
+  } from 'vue-router'
+
+  /**
+   * Route name map generated by unplugin-vue-router
+   */
+  export interface RouteNamedMap {
+    '/About': RouteRecordInfo<'/About', '/About', Record<never, never>, Record<never, never>>,
+    '/AddTransaction': RouteRecordInfo<'/AddTransaction', '/AddTransaction', Record<never, never>, Record<never, never>>,
+    '/AdminCategories': RouteRecordInfo<'/AdminCategories', '/AdminCategories', Record<never, never>, Record<never, never>>,
+    '/Categories': RouteRecordInfo<'/Categories', '/Categories', Record<never, never>, Record<never, never>>,
+    '/Dashboard': RouteRecordInfo<'/Dashboard', '/Dashboard', Record<never, never>, Record<never, never>>,
+    '/EditTransaction': RouteRecordInfo<'/EditTransaction', '/EditTransaction', Record<never, never>, Record<never, never>>,
+    '/Login': RouteRecordInfo<'/Login', '/Login', Record<never, never>, Record<never, never>>,
+    '/Reports': RouteRecordInfo<'/Reports', '/Reports', Record<never, never>, Record<never, never>>,
+    '/Settings': RouteRecordInfo<'/Settings', '/Settings', Record<never, never>, Record<never, never>>,
+    '/Transactions': RouteRecordInfo<'/Transactions', '/Transactions', Record<never, never>, Record<never, never>>,
+  }
+}