Problem
- Genz Updates could still return 403/Cloudflare in extension requests even when the same site worked in WebView.
- The extension HTTP path primarily used cached cookies from settings instead of reliably using the current WebView cookie jar.
- Cloudflare challenge detection was too narrow (mostly English markers) and could misclassify localized challenge pages as resolved.
Solution
- Prefer live WebView cookies for outgoing extension HTTP requests, with settings cookies as fallback.
- Sync cookie + user-agent from embedded WebView on onLoadStop in addition to history updates.
- Expand challenge detection with additional multilingual and platform markers.
Implementation Details
- Updated `MCookieManager.interceptRequest` to read cookies from `CookieManager.getCookies()` and use them as the request `Cookie` header when available.
- Added `_syncCookieAndUaFromWebView()` in `MangaWebView` and invoked it from both `onLoadStop` and `onUpdateVisitedHistory` to persist fresh clearance cookies immediately.
- Introduced a centralized `_cloudflareChallengePattern` in `m_client.dart` and reused it in `_containsCloudflareChallengeHtml` and `_isCloudflareChallengePage` for consistent challenge detection.
- getCookiesPref() and deleteAllCookies():
Avoid repeated parsing of `Uri.parse(url).host` by creating a variable.
- httpClient():
cache RhttpCompatibleClients and add default IOClient fallback.
- shouldAttemptRetryOnResponse():
Added a delay to avoid busy looping.
- remove cronet_http & cupertino_http
- use rhttp package as default http client
- fix#198#200 crashes on multiple downloads
- fix#162#102 unable to download with forbidden characters in the name (as it is fixed this can cause reading problems concerning chapters downloaded before this version)
- now supports all features on all platforms such as VPNs and HTTP proxies thanks to rhttp package
