v1.8.0: Full diagnostic sweep - 20 bugs fixed

Critical fixes:
- extractPages.helper.js: Pagination URL bug (?page → &page)
- package.json: Fixed invalid dep versions (axios, dotenv, express)
- privacy.html + tos.html: Broken footer links (//tos → /tos)
- manifest.json: Invalid icon purpose (any maskable → maskable)

High fixes:
- server.js: Removed duplicate CORS middleware (triple → single)
- search.controller.js: Cache key collision with suggestion controller
- apiRoutes.js: Dynamic endpoint count (was hardcoded 27)
- vercel.json: Removed duplicate CORS header

Medium fixes:
- header.config.js: Updated User-Agent to Chrome 130
- dataUrl.js: Removed redundant domain from ALT_DOMAINS
- category.extractor.js: Removed unused cheerio import
- server.js: Added __dirname, removed unused cors import

Documentation:
- CHANGELOG.md: Added v1.8.0 entry
- README.md: Updated version badges (1.8.0, Express 4.21)
- test.js: Fixed status endpoint (currently-airing → airing)

public/manifest.json

@@ -11,19 +11,13 @@
       "src": "/favicon-origin.png",
       "sizes": "192x192",
       "type": "image/png",
-      "purpose": "any maskable"
+      "purpose": "maskable"
     },
     {
       "src": "/favicon.svg",
       "sizes": "any",
       "type": "image/svg+xml",
       "purpose": "any"
-    },
-    {
-      "src": "/share.jpg",
-      "sizes": "any",
-      "type": "image/jpeg",
-      "purpose": "any"
     }
   ],
   "categories": ["developer", "entertainment"]