Add repo filters, UI tabs and dev docs

Enhance UI and dev workflow: add main/right tabbed panels (Repositories/Local and Clone/Settings/Servers), repository owner filter pills (All/Personal/Organizations), org-grouped listing, repo cards, git output and empty-state styling. Introduce new state vars (activeMainTab, activeRightTab, repoOwnerFilter, currentUserLogin) and update event bindings to toggle tabs/filters and focus appropriate panels on actions. Add fetchCurrentUser to gitea-api and use it when loading repositories to distinguish personal vs organization repos (falls back to mock user on error). Update README with development/prerequisites and build instructions and rename npm script "tauri:dev" -> "dev" for running the Tauri dev process.

README.md

@@ -30,9 +30,44 @@ It connects to any compatible self-hosted Gitea instance (including Gitpub) with
 - Rust Git commands: clone, pull, push, status, branch
 - Settings for git path, clone directory, and theme placeholder
 
-## Run
+## Development
+
+### Prerequisites
+
+- [Node.js](https://nodejs.org/) (npm comes with it)
+- [Rust](https://www.rust-lang.org/tools/install) via `rustup` (required for the Tauri backend)
+- Platform-specific Tauri dependencies (WebView2 on Windows, Xcode tools on macOS, etc.) — see the [Tauri prerequisites](https://v2.tauri.app/start/prerequisites/) for your OS
+- **Git** installed and available on your `PATH` (the app shells out to `git` for clone, pull, push, and related commands)
+
+### Start the app in dev mode
+
+From the repository root:
 
 ```bash
 npm install
-npm run tauri:dev
+npm run dev
 ```
+
+This runs the Tauri dev process, which loads the static frontend from `frontend/` and hot-reloads the Rust side when you change `src-tauri/`. Edit HTML/CSS/JS under `frontend/` and refresh the window (or rely on your usual workflow) as needed.
+
+### Production build
+
+```bash
+npm install
+npm run tauri:build
+```
+
+Installers and bundles are emitted under `src-tauri/target/release/bundle/` (exact paths depend on the target platform).
+
+### Useful commands
+
+| Command | Purpose |
+| --- | --- |
+| `npm run dev` | Desktop app in development mode |
+| `npm run tauri:build` | Release build and platform bundles |
+| `npm run tauri -- <args>` | Forward arguments to the Tauri CLI (e.g. `npm run tauri -- info`) |
+
+### Notes
+
+- There is no separate Vite/webpack dev server; the UI is plain static files under `frontend/`.
+- Point the app at a running Gitea-compatible instance during setup; API calls use `<your-server>/api/v1`.