Phase 1 MVP - Complete implementation

- Login with JWT and refresh token rotation
- Dashboard with projects cards
- ProjectView with TreeView navigation
- DocumentView with markdown editor and auto-save
- Tag management (create, assign, remove)
- Dark mode CSS variables
- Security fixes applied (logout to backend, createDocument endpoint)

node_modules/@vue/language-core/lib/languagePlugin.d.ts

@@ -0,0 +1,6 @@
+import { LanguagePlugin } from '@volar/language-core';
+import type * as ts from 'typescript';
+import type { VueCompilerOptions } from './types';
+import { VueVirtualCode } from './virtualFile/vueFile';
+export declare function createVueLanguagePlugin<T>(ts: typeof import('typescript'), compilerOptions: ts.CompilerOptions, vueCompilerOptions: VueCompilerOptions, asFileName: (scriptId: T) => string): LanguagePlugin<T, VueVirtualCode>;
+export declare function getAllExtensions(options: VueCompilerOptions): string[];