feat: releases from GitHub first, then git.kebcloud.no; releases sets others

Updates and install.sh try the GitHub mirror, then git.kebcloud.no,
each with a short timeout, and download from the first server with the
release, checked against its checksums.txt. The releases config option
(and LAZYSECRETS_RELEASES for install.sh) lists other servers. The
release workflow copies each release to GitHub when GH_RELEASE_TOKEN is
set. The status pane's issues link points to GitHub.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

cmd/lazysecrets/main.go

@@ -155,7 +155,7 @@ Flags:
 	case len(args) > 0 && args[0] == "launch":
 		return launch(*configPath, args[1:])
 	case len(args) > 0 && args[0] == "update":
-		return updateCmd(args[1:])
+		return updateCmd(*configPath, args[1:])
 	case len(args) == 0:
 	case args[0] == "open" && len(args) == 2:
 		r, err := ref.Parse(args[1])
@@ -364,7 +364,7 @@ Flags:
 		ExpiryWarning:  time.Duration(expiryDays) * 24 * time.Hour,
 		HideOnBlur:     config.On(cfg.HideOnBlur),
 		HandlerSetup:   setup,
-		Updater:        updater(),
+		Updater:        updater(cfg.Releases),
 		UpdateCheck:    config.On(cfg.UpdateCheck),
 		Keys:           &keymap,
 		Commands:       cfg.CustomCommands,

cmd/lazysecrets/update.go

@@ -7,14 +7,16 @@ import (
 	"strings"
 	"time"
 
+	"git.kebcloud.no/keb/lazysecrets/internal/config"
 	"git.kebcloud.no/keb/lazysecrets/internal/ui/app"
 	"git.kebcloud.no/keb/lazysecrets/internal/update"
 )
 
 // updater is the app's way to find and install releases, replacing the
-// binary that's running.
-func updater() *app.Updater {
-	c := &update.Client{}
+// binary that's running, from the servers (config releases) or the
+// default ones.
+func updater(servers []string) *app.Updater {
+	c := &update.Client{Servers: servers}
 	return &app.Updater{
 		Latest: c.Latest,
 		Install: func(ctx context.Context, r update.Release) error {
@@ -29,15 +31,19 @@ func updater() *app.Updater {
 
 // updateCmd is lazysecrets update [--check]: the newer release's
 // changelog, then (unless --check) install it.
-func updateCmd(args []string) error {
+func updateCmd(configPath string, args []string) error {
 	check := len(args) == 1 && args[0] == "--check"
 	if len(args) > 0 && !check {
 		return errors.New("usage: lazysecrets update [--check]")
 	}
+	cfg, err := config.LoadAll(strings.Split(configPath, ","))
+	if err != nil {
+		return err
+	}
 	current := versionString()
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Minute)
 	defer cancel()
-	c := &update.Client{}
+	c := &update.Client{Servers: cfg.Releases}
 	r, err := c.Latest(ctx)
 	if err != nil {
 		return fmt.Errorf("looking for a newer lazysecrets: %w", err)