chore: point install/update/self-update at this fork instead of upstream

install.sh, update.sh, and x-ui.sh all hardcoded MHSanaei/3x-ui as the
release/raw-file source (release tarball downloads, the self-update
script fetch, service unit fallback downloads). Left as-is, merging
AmneziaWG into main and cutting a release here would still silently
install upstream's stock binary — none of our work would ever reach a
machine that runs the curl-from-GitHub one-liner.

Repointed all of it at Kuzz007/3x-ui, plus two more functional (not
just doc/attribution) spots the same grep turned up: the panel's own
in-app update checker (internal/web/service/panel/panel.go's
panelUpdaterURL and the GitHub releases API calls in
fetchPanelRelease) and deploy/cloud-init/cloud-init.yaml's
auto-provisioning curl line. Left README/docs/CONTRIBUTING/FUNDING
attribution to the upstream project untouched — this is still a fork
of MHSanaei's work, that credit stays.

Third-party dependency downloads in .github/workflows/release.yml
(Xray-core, geoip/geosite data, mtg-multi) intentionally still point
at their own respective upstream projects, not this fork.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

internal/web/service/panel/panel.go

@@ -40,7 +40,7 @@ type PanelUpdateInfo struct {
 }
 
 const (
-	panelUpdaterURL      = "https://raw.githubusercontent.com/MHSanaei/3x-ui/main/update.sh"
+	panelUpdaterURL      = "https://raw.githubusercontent.com/Kuzz007/3x-ui/main/update.sh"
 	maxPanelUpdaterBytes = 2 << 20
 	// devReleaseTag is the fixed-tag rolling pre-release the CI force-moves to the
 	// newest main commit; the dev update channel installs from it.
@@ -413,9 +413,9 @@ func fetchLatestPanelVersion() (string, error) {
 // fetchPanelRelease fetches a release from GitHub. An empty tag resolves the
 // latest stable release; a non-empty tag (e.g. dev-latest) resolves that tag.
 func fetchPanelRelease(tag string) (*service.Release, error) {
-	url := "https://api.github.com/repos/MHSanaei/3x-ui/releases/latest"
+	url := "https://api.github.com/repos/Kuzz007/3x-ui/releases/latest"
 	if tag != "" {
-		url = "https://api.github.com/repos/MHSanaei/3x-ui/releases/tags/" + tag
+		url = "https://api.github.com/repos/Kuzz007/3x-ui/releases/tags/" + tag
 	}
 	client := (&service.SettingService{}).NewProxiedHTTPClient(10 * time.Second)
 	req, reqErr := http.NewRequestWithContext(context.Background(), http.MethodGet, url, nil)