fix: Full diagnostic sweep — bugs, dead code, unused imports, docs accuracy

Code fixes:
- seasons/watchOrder: Remove dead ternary (both branches identical)
- mirror.helper: Remove redundant ternary (both branches identical)
- topAnimeRankings: Fix JSDoc (day/week/month, not top/newest)
- apiRoutes: Fix proxy domain validation (exact match, not includes)
- apiRoutes: Fix proxy .m3u8 check (pathname, not hostname)
- pagination: Fix totalItems calculation (was overestimating)
- server.js: Remove dead has404File variable
- server.js: Remove duplicate /api/cache/stats route
- server.js: Remove unused getCacheStats import

Unused imports removed:
- animeInfo: URLS from dataUrl.js
- episodeList: headers from header.config.js
- episodeListAjax: axios
- trending: URLS from dataUrl.js
- trendingSidebar: URLS from dataUrl.js
- upcomingAnime: parseListItems
- watchPage: URLS, BASE_URL from dataUrl.js

Docs fixes:
- README: 33->38 endpoints, 24->28 controllers, 26->28 extractors
- README: Cache TTL 5min->per-endpoint, Timeout 15s->30s
- docs/index.md: 33->38 endpoints
- architecture.md: LRU cache strategy, remove stale cookie-parser
- agents: compression version, extractor/controller counts
- agents: domain typo, stale CORS dep, version badge

agents/technical-writer.md

@@ -19,7 +19,7 @@ You are **Technical Writer** for AniKotoAPI, responsible for maintaining all doc
 
 ```
 AniKotoAPI/
-├── README.md              # Main docs (2200+ lines)
+├── README.md              # Main docs (2600+ lines)
 ├── CHANGELOG.md           # Version history (append only)
 ├── CONTRIBUTING.md         # Contribution guidelines
 ├── docs/
@@ -27,7 +27,8 @@ AniKotoAPI/
 │   ├── endpoints.md       # Full API reference (38 endpoints)
 │   ├── streaming.md       # 3-step streaming flow guide
 │   ├── examples.md        # cURL, JS, Python examples
-│   └── architecture.md    # Project structure, tech stack
+│   ├── architecture.md    # Project structure, tech stack
+│   └── testing.md         # Integration test suite & benchmarks
 └── public/
     ├── index.html         # Landing page
     ├── tos.html           # Terms of Service