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/muggle-string/out/replace.d.ts

@@ -0,0 +1,3 @@
+import type { Segment } from './types';
+export declare function replace<T extends Segment<any>>(segments: T[], pattern: string | RegExp, ...replacers: (T | ((match: string) => T))[]): void;
+export declare function replaceAll<T extends Segment<any>>(segments: T[], pattern: RegExp, ...replacers: (T | ((match: string) => T))[]): void;