Remove the RepoISO integration; keep generic support for shares of other services

RepoISO now manages the NAS itself, so nasmon no longer polls it (settings field, dashboard card,
menu link and repoiso:* alerts are gone). Drop-in SMB includes, read-only listing and keeping
smbd/nfs-server running for other software's shares stay.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/web/server.go

@@ -8,9 +8,7 @@ import (
 	"io/fs"
 	"log"
 	"math"
-	"net"
 	"net/http"
-	"net/url"
 	"path/filepath"
 	"strings"
 	"sync"
@@ -107,7 +105,6 @@ type pageData struct {
 	Data    any
 	Flash   string
 	Error   string
-	RepoISO string // browser URL of the RepoISO portal ("" = integration off)
 }
 
 // render writes a full page, or only the "content" block when ?partial=1 is
@@ -115,7 +112,6 @@ type pageData struct {
 func (s *Server) render(w http.ResponseWriter, r *http.Request, name string, pd pageData) {
 	pd.Page = name
 	pd.Partial = r.URL.Query().Get("partial") == "1"
-	pd.RepoISO = browserURL(s.cfg.Get().Integrations.RepoISOURL, r.Host)
 	if pd.Alerts == 0 {
 		pd.Alerts = len(s.sch.Status().Alerts)
 	}
@@ -292,33 +288,3 @@ func sparkline(vals []float64, max float64, class string) template.HTML {
 		`<svg class="spark %s" viewBox="0 0 %d %d" preserveAspectRatio="none"><polygon points="0,%d %s %d,%d"/><polyline points="%s"/></svg>`,
 		class, int(w), int(h), int(h), p, int(w), int(h), p))
 }
-
-// browserURL turns the configured RepoISO address into one the user's browser
-// can open: a loopback host is replaced by the host the browser used for nasmon.
-func browserURL(cfg, reqHost string) string {
-	if cfg == "" {
-		return ""
-	}
-	u, err := url.Parse(cfg)
-	if err != nil || u.Host == "" {
-		return cfg
-	}
-	switch u.Hostname() {
-	case "127.0.0.1", "localhost", "::1":
-		host := reqHost
-		if h, _, err := net.SplitHostPort(reqHost); err == nil {
-			host = h
-		}
-		if host == "" {
-			return cfg
-		}
-		if strings.Contains(host, ":") {
-			host = "[" + host + "]"
-		}
-		if p := u.Port(); p != "" {
-			host += ":" + p
-		}
-		u.Host = host
-	}
-	return u.String()
-}