Align README backend manual setup with current layout

README.md

@@ -170,34 +170,36 @@ When running, the FastAPI automatic documentation is available at:
 ### 1. Create and activate the uv virtual environment
 
 ```sh
-uv venv plex-playlist
-source plex-playlist/bin/activate
+cd backend
+uv venv .venv
+source .venv/bin/activate
 ```
 
 ### 2. Install dependencies
 
 ```sh
-uv pip install fastapi uvicorn[standard]
-uv pip install ruff
+uv sync --all-groups
 ```
 
 ### 3. Install dev tools
 
 ```sh
-uv pip install pyright
+uv run poe format
+uv run poe lint
+uv run poe test
 ```
 
 ### 4. Project structure
 
-- `app/` - FastAPI application code
+- `src/backend/` - FastAPI application code
 - `tests/` - Test suite
 - `pyrightconfig.json` - Pyright type checking config
-- `ruff.toml` - Ruff linter config
+- `pyproject.toml` - Ruff, pytest, and task configuration
 
 ### 5. Run the development server
 
 ```sh
-uvicorn app.main:app --reload
+uv run uvicorn backend.main:app --reload --app-dir src
 ```
 
 ---