Observer

Frontend

Stack

ConcernChoice
FrameworkReact 19 + React Compiler
BundlerVite 6
Package managerBun (workspace monorepo)
RoutingTanStack Router (file-based)
Data fetchingTanStack Query v5
StylingTailwind CSS v4
Headless UIBase UI (@base-ui/react)
IconsPhosphor Icons (@phosphor-icons/react)
i18ni18next + react-i18next
Type checkingTypeScript 5.7 (strict)

Project layout

packages/observer-web/
  index.html
  vite.config.ts
  tsconfig.json
  vite-env.d.ts
  src/
    main.tsx                  # app bootstrap (Router + Query + i18n)
    main.css                  # Tailwind entry
    lib/
      api.ts                  # fetch wrapper (credentials: include, 401 auto-refresh)
      i18n.ts                 # i18next setup
    types/
      auth.ts                 # auth DTOs matching backend
    stores/
      auth.tsx                # AuthProvider context + useAuth hook
    locales/
      ky.json                 # Kyrgyz Latin (default)
      en.json                 # English
    routes/
      __root.tsx              # root layout (AuthProvider wraps Outlet)
      _auth.tsx               # public layout — redirects to / if authenticated
      _auth/
        login.tsx             # /login
        register.tsx          # /register
      _app.tsx                # protected layout — redirects to /login if not
      _app/
        index.tsx             # / (dashboard stub)

Running

just web-install    # install dependencies (bun)
just web-dev        # start dev server (http://localhost:5173)
just web-build      # production build
just web-preview    # preview production build

Import conventions

@/ alias resolves to src/. Configured in both tsconfig.json and vite.config.ts.

Import order (blank line between groups):

  1. react, react-dom
  2. External libs (@tanstack/*, @base-ui/*, @phosphor-icons/*, i18next)
  3. App aliases (@/lib/*, @/stores/*, @/types/*)
  4. Colocated siblings (./constants, ./types)
  5. Styles (.module.css) — always last

Adding a new route

  1. Create a file under src/routes/. TanStack Router’s Vite plugin auto-generates the route tree.
  2. Protected routes go under _app/ (requires authentication).
  3. Public auth routes go under _auth/ (redirects away if already authenticated).

Example:

// src/routes/_app/settings.tsx → /settings (protected)
import { createFileRoute } from "@tanstack/react-router";

export const Route = createFileRoute("/_app/settings")({
  component: SettingsPage,
});

function SettingsPage() {
  return <div>Settings</div>;
}

Adding translations

  1. Add keys to both src/locales/ky.json and src/locales/en.json.
  2. Use in components via useTranslation():
import { useTranslation } from "react-i18next";

function MyComponent() {
  const { t } = useTranslation();
  return <p>{t("namespace.key")}</p>;
}

Interpolation uses {{variable}} syntax in JSON:

{ "greeting": "Salam, {{name}}" }
t("greeting", { name: "Ali" }); // → "Salam, Ali"

Environment variables

VariableDefaultDescription
VITE_API_URLhttp://localhost:9000Backend API base URL

Vite only exposes variables prefixed with VITE_.

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