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/entities/decode.d.ts

@@ -0,0 +1,3 @@
+// eslint-disable-next-line @typescript-eslint/ban-ts-comment
+// @ts-ignore
+export * from "./dist/commonjs/decode.js";