matugen: fix adw-gtk3 setting in light mode

- and add models.Get/GetOr helpers

core/internal/server/models/types.go

@@ -5,6 +5,7 @@ import (
 	"net"
 
 	"github.com/AvengeMedia/DankMaterialShell/core/internal/log"
+	"github.com/AvengeMedia/DankMaterialShell/core/internal/server/params"
 )
 
 type Request struct {
@@ -13,6 +14,15 @@ type Request struct {
 	Params map[string]any `json:"params,omitempty"`
 }
 
+func Get[T any](r Request, key string) (T, bool) {
+	v, err := params.Get[T](r.Params, key)
+	return v, err == nil
+}
+
+func GetOr[T any](r Request, key string, def T) T {
+	return params.GetOpt(r.Params, key, def)
+}
+
 type Response[T any] struct {
 	ID     int    `json:"id,omitempty"`
 	Result *T     `json:"result,omitempty"`

core/internal/server/models/types_test.go

@@ -0,0 +1,52 @@
+package models
+
+import "testing"
+
+func TestGet(t *testing.T) {
+	req := Request{Params: map[string]any{"name": "test", "count": 42, "enabled": true}}
+
+	name, ok := Get[string](req, "name")
+	if !ok || name != "test" {
+		t.Errorf("Get[string] = %q, %v; want 'test', true", name, ok)
+	}
+
+	count, ok := Get[int](req, "count")
+	if !ok || count != 42 {
+		t.Errorf("Get[int] = %d, %v; want 42, true", count, ok)
+	}
+
+	enabled, ok := Get[bool](req, "enabled")
+	if !ok || !enabled {
+		t.Errorf("Get[bool] = %v, %v; want true, true", enabled, ok)
+	}
+
+	_, ok = Get[string](req, "missing")
+	if ok {
+		t.Error("Get missing key should return false")
+	}
+
+	_, ok = Get[int](req, "name")
+	if ok {
+		t.Error("Get wrong type should return false")
+	}
+}
+
+func TestGetOr(t *testing.T) {
+	req := Request{Params: map[string]any{"name": "test", "enabled": true}}
+
+	if v := GetOr(req, "name", "default"); v != "test" {
+		t.Errorf("GetOr existing = %q; want 'test'", v)
+	}
+
+	if v := GetOr(req, "missing", "default"); v != "default" {
+		t.Errorf("GetOr missing = %q; want 'default'", v)
+	}
+
+	if v := GetOr(req, "enabled", false); !v {
+		t.Errorf("GetOr bool = %v; want true", v)
+	}
+
+	if v := GetOr(req, "name", 0); v != 0 {
+		t.Errorf("GetOr wrong type = %d; want 0 (default)", v)
+	}
+}