feat: Sprint 3 — settings page with tabs/toggles/devices/danger-zone, brief page

app/backend/internal/handler/settings.go

@@ -0,0 +1,44 @@
+package handler
+
+import (
+	"github.com/gofiber/fiber/v2"
+	"git.tukangketik.id/swanadiva/hostkeeper/v2/internal/model"
+)
+
+var deviceStore = model.NewDeviceStore()
+var configStore = model.NewConfigStore()
+
+func Settings(c *fiber.Ctx) error {
+	return c.Render("settings", fiber.Map{
+		"View":      "settings",
+		"Title":     "Settings",
+		"Config":    configStore.Get(),
+		"Devices":   deviceStore.All(),
+		"NavItems":  navItems,
+	})
+}
+
+func UpdateConfig(c *fiber.Ctx) error {
+	cfg := configStore.Get()
+	if v := c.FormValue("theme"); v != "" { cfg.Theme = v }
+	if v := c.FormValue("fontSize"); v != "" { cfg.FontSize = parseInt(v, 14) }
+	if v := c.FormValue("scrollback"); v != "" { cfg.Scrollback = parseInt(v, 5000) }
+	if v := c.FormValue("autoLock"); v != "" { cfg.AutoLock = parseInt(v, 5) }
+	cfg.Keepalive = c.FormValue("keepalive") == "on"
+	cfg.CopyOnSelect = c.FormValue("copyOnSelect") == "on"
+	cfg.BellEnabled = c.FormValue("bellEnabled") == "on"
+	cfg.AutoReconnect = c.FormValue("autoReconnect") == "on"
+	cfg.BlinkCursor = c.FormValue("blinkCursor") == "on"
+	configStore.Update(cfg)
+	return c.Redirect("/settings", 303)
+}
+
+func parseInt(s string, def int) int {
+	i := 0
+	for _, c := range s {
+		if c < '0' || c > '9' { return def }
+		i = i*10 + int(c-'0')
+	}
+	if i == 0 { return def }
+	return i
+}