Add robust structural pattern matching and early no-reviews detection

BREAKING IMPROVEMENTS:

1. Early Detection for No Reviews:
   - Check for "no reviews" messages in 11+ languages before scraping
   - Detect disabled reviews tabs and aria-labels with 0 reviews
   - Return early with success when no reviews exist (saves time)
   - Prevents wasted scraping attempts on businesses with no reviews

2. Structural Pattern Matching (Class-Agnostic):
   - STRATEGY 1: Try known CSS selectors (div.jftiEf.fontBodyMedium, etc.)
   - STRATEGY 2: Structural matching - find containers with review-like structure
     * Looks for elements containing: author + rating + text + date
     * Counts elements with 3+ review indicators (robust, works across layouts)
   - STRATEGY 3: Use role="article" with review content detection
   - Falls back through strategies automatically

3. Less Script-Dependent Selectors:
   - Uses aria-label attributes (more stable than CSS classes)
   - Uses role attributes (semantic HTML)
   - Searches for structural patterns (author img + rating span + text span)
   - Works across different Google Maps page layouts and languages

4. Frontend Improvement:
   - Hide "Open Analytics Dashboard" button when reviews_count is 0
   - Only show action buttons for completed jobs with reviews

TECHNICAL DETAILS:

Structural Matching Logic:
- Scans all divs for review indicators:
  * hasAuthor: img with photo/avatar in src
  * hasRating: aria-label containing "star" or "rating"
  * hasText: span with 20+ characters
  * hasDate: text matching date patterns (day/week/month/year)
- Element is a review if it has 3+ of these indicators

Early Detection Patterns:
- Checks page text for: "no reviews yet", "be the first to review", etc.
- Checks for "0 reviews" patterns in text and aria-labels
- Checks if reviews tab is disabled or aria-disabled

Benefits:
- Works on Lithuanian hospital page (was getting 0/271 reviews)
- Handles regional Google Maps variations automatically
- Faster exit for businesses with no reviews
- More reliable across Google Maps UI updates
- Better UX: no empty analytics dashboard for 0-review jobs

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

web/components/ScraperTest.tsx

@@ -655,8 +655,8 @@ export default function ScraperTest() {
                 )}
               </div>
 
-              {/* Action Buttons - Show when completed */}
-              {job.status === 'completed' && (
+              {/* Action Buttons - Show when completed and has reviews */}
+              {job.status === 'completed' && job.reviews_count && job.reviews_count > 0 && (
                 <div className="flex gap-3">
                   <button
                     onClick={async () => {