fix: run frontend without virtualenv

- Modify app.py to add vendor/ to sys.path so pip --target works.
- Add frontend/.gitignore to exclude vendor/, __pycache__, thermopro.db.
- Update README with pip --target instructions.

frontend/.gitignore

@@ -0,0 +1,6 @@
+.venv
+__pycache__/
+*.pyc
+thermopro.db
+vendor/
+.DS_Store

frontend/README.md

@@ -6,7 +6,7 @@ A Progressive Web App (PWA) that consumes the CYD ThermoPro Bridge API, stores s
 
 ```
 LXC/container
-├── Python backend (FastAPI/Flask)
+├── Python backend (Flask)
 │   ├── Polls CYD /api/latest periodically
 │   ├── Stores readings + sessions + notes in SQLite
 │   └── Serves the static PWA and API
@@ -19,17 +19,37 @@ LXC/container
 
 ## Requirements
 
-- Python 3.10+
-- `flask`, `requests`, `gunicorn` (or `uvicorn` if FastAPI)
+- Python 3.10+ (system install or any working Python interpreter)
 - SQLite (stdlib)
 
+Dependencies are installed locally into `frontend/vendor/` so no virtual environment is required.
+
+## Installing dependencies
+
+```bash
+cd frontend
+pip install --target vendor -r requirements.txt
+```
+
+On Windows with PowerShell:
+
+```powershell
+cd "C:\Users\ksolo\Projects\House Projects\ThermoPro CYD\frontend"
+pip install --target vendor -r requirements.txt
+```
+
 ## Running locally
 
 ```bash
 cd frontend
-python -m venv .venv
-source .venv/bin/activate  # Windows: .venv\Scripts\activate
-pip install -r requirements.txt
+CYD_BASE_URL=http://192.168.2.55 python app.py
+```
+
+On Windows with PowerShell:
+
+```powershell
+cd "C:\Users\ksolo\Projects\House Projects\ThermoPro CYD\frontend"
+$env:CYD_BASE_URL = "http://192.168.2.55"
 python app.py
 ```
 
@@ -37,14 +57,13 @@ Then open `http://localhost:5000`.
 
 ## Configuration
 
-The backend needs to know the CYD IP. Set the environment variable:
-
-```bash
-export CYD_BASE_URL=http://192.168.2.55
-```
-
-or edit the default in `config.py`.
+| Environment variable | Default | Description |
+|----------------------|---------|-------------|
+| `CYD_BASE_URL` | `http://192.168.2.55` | Base URL of the CYD bridge |
+| `POLL_INTERVAL` | `5` | Seconds between backend polls |
+| `DATABASE_PATH` | `thermopro.db` | SQLite database file |
+| `DEFAULT_CHART_MINUTES` | `60` | Default chart time range |
 
 ## Deployment
 
-Serve the app behind a reverse proxy (e.g. Caddy or Nginx) in an LXC. The backend will continue polling the CYD as long as it can reach the device.
+Serve the app behind a reverse proxy (e.g. Caddy or Nginx) in an LXC. The backend continues polling the CYD as long as it can reach the device.

frontend/app.py

@@ -1,7 +1,14 @@
 import json
+import sys
 import threading
 import time
 from datetime import datetime, timezone
+from pathlib import Path
+
+# Add vendor/ to the import path so pip --target dependencies are found.
+vendor_path = Path(__file__).parent / "vendor"
+if vendor_path.exists():
+    sys.path.insert(0, str(vendor_path))
 
 import requests
 from flask import Flask, jsonify, request, render_template