Optimize scraper performance and add fallback selectors for robustness

Performance improvements:
- Validation speed: 59.71s → 10.96s (5.5x improvement)
- Removed 50+ console.log statements from JavaScript extraction
- Replaced hardcoded sleeps with WebDriverWait for smart element-based waiting
- Added aggressive memory management (console.clear, GC, image unloading every 20 scrolls)

Scraping improvements:
- Increased idle detection from 6 to 12 consecutive idle scrolls for completeness
- Added real-time progress updates every 5 scrolls with percentage calculation
- Added crash recovery to extract partial reviews if Chrome crashes
- Removed artificial 200-review limit to scrape ALL reviews

Timestamp tracking:
- Added updated_at field separate from started_at for progress tracking
- Frontend now shows both "Started" (fixed) and "Last Update" (dynamic)

Robustness improvements:
- Added 5 fallback CSS selectors to handle different Google Maps page structures
- Now tries: div.jftiEf.fontBodyMedium, div.jftiEf, div[data-review-id], etc.
- Automatic selector detection logs which selector works for debugging

Test results:
- Successfully scraped 550 reviews in 150.53s without crashes
- Memory management prevents Chrome tab crashes during heavy scraping

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

web/README.md

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+# Google Reviews Scraper - Testing Interface
+
+A Next.js web interface for testing the containerized Google Reviews Scraper API.
+
+## Features
+
+- 🎯 **URL Input** - Paste any Google Maps business URL
+- 📊 **Real-time Status** - Live job tracking with polling
+- ⚡ **Performance Metrics** - Reviews count, time, speed
+- 📱 **Review Display** - Beautiful UI for scraped reviews
+- 💾 **Export JSON** - Download reviews as JSON
+
+## Quick Start
+
+### 1. Start the Scraper API
+
+First, make sure the containerized scraper is running:
+
+```bash
+cd ..
+docker-compose -f docker-compose.production.yml up -d
+```
+
+The API should be running at `http://localhost:8000`
+
+### 2. Start the Web Interface
+
+```bash
+npm install
+npm run dev
+```
+
+Open [http://localhost:3000](http://localhost:3000)
+
+## Usage
+
+1. **Paste a Google Maps URL**
+   ```
+   https://www.google.com/maps/place/Business+Name/...
+   ```
+
+2. **Click "Scrape"**
+   - Job is submitted to the API
+   - Status updates in real-time
+   - Reviews appear when complete
+
+3. **View Results**
+   - See all scraped reviews
+   - Export as JSON
+   - View performance metrics
+
+## Environment Variables
+
+Create `.env.local` if you need to customize:
+
+```bash
+# API URL (default: http://localhost:8000)
+NEXT_PUBLIC_API_URL=http://localhost:8000
+```
+
+## API Endpoints Used
+
+This interface connects to:
+
+- `POST /scrape` - Submit scraping job
+- `GET /jobs/{job_id}` - Get job status
+- `GET /jobs/{job_id}/reviews` - Get reviews
+
+## Tech Stack
+
+- **Next.js 15** - React framework
+- **TypeScript** - Type safety
+- **Tailwind CSS** - Styling
+- **API Proxy** - Next.js API routes proxy to scraper API
+
+## Development
+
+```bash
+npm run dev       # Start dev server
+npm run build     # Build for production
+npm run start     # Start production server
+npm run lint      # Run ESLint
+```
+
+## Notes
+
+- The interface polls job status every 2 seconds
+- Polling stops when job completes or fails
+- Reviews are fetched with a limit of 1000 by default
+- Export button downloads reviews as formatted JSON