Add recrawl functionality and fix PHPCS warnings

- Added "Recrawl" button in jobs table UI
- Implemented recrawl API endpoint that deletes all job data and restarts crawl
- Fixed PHPCS line length warnings in api.php and Crawler.php

All quality checks pass:
- PHPStan Level 8: 0 errors
- PHPCS PSR-12: 0 warnings

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

src/classes/Crawler.php

@@ -211,8 +211,8 @@ class Crawler
 
                 // Save link
                 $stmt = $this->db->prepare(
-                    "INSERT INTO links (page_id, crawl_job_id, source_url, target_url, link_text, is_nofollow, is_internal)
-                    VALUES (?, ?, ?, ?, ?, ?, ?)"
+                    "INSERT INTO links (page_id, crawl_job_id, source_url, target_url, " .
+                    "link_text, is_nofollow, is_internal) VALUES (?, ?, ?, ?, ?, ?, ?)"
                 );
                 $stmt->execute([
                     $pageId,