feat(gui): gpt-5.4-mini/mature pass 3

Constraint:

Co-Authored-By: Virgil <virgil@lethean.io>

.core/TODO.md

@@ -0,0 +1 @@
+- @bug pkg/window/state.go:26 — window state persistence writes to the default home config path, which breaks restricted test/runtime environments unless the target path is configurable.

stubs/wails/pkg/application/application.go

@@ -143,10 +143,16 @@ type WindowEventContext struct {
 }
 
 func (c *WindowEventContext) DroppedFiles() []string {
+	if c == nil {
+		return nil
+	}
 	return append([]string(nil), c.droppedFiles...)
 }
 
 func (c *WindowEventContext) DropTargetDetails() *DropTargetDetails {
+	if c == nil {
+		return nil
+	}
 	if c.dropDetails == nil {
 		return nil
 	}
@@ -165,6 +171,9 @@ type WindowEvent struct {
 }
 
 func (e *WindowEvent) Context() *WindowEventContext {
+	if e == nil {
+		return nil
+	}
 	if e.ctx == nil {
 		e.ctx = &WindowEventContext{}
 	}

stubs/wails/pkg/application/application_test.go

@@ -249,6 +249,19 @@ func TestApplication_WindowEvent_Ugly(t *testing.T) {
 	assert.Equal(t, []string{"file"}, event.Context().DroppedFiles())
 }
 
+func TestApplication_WindowEvent_NilReceiver(t *testing.T) {
+	var event *WindowEvent
+
+	assert.Nil(t, event.Context())
+}
+
+func TestApplication_WindowEventContext_NilReceiver(t *testing.T) {
+	var ctx *WindowEventContext
+
+	assert.Empty(t, ctx.DroppedFiles())
+	assert.Nil(t, ctx.DropTargetDetails())
+}
+
 func TestApplication_WebviewWindow_Good(t *testing.T) {
 	manager := &WindowManager{}
 	window := manager.NewWithOptions(WebviewWindowOptions{

stubs/wails/pkg/application/events.go

@@ -45,6 +45,9 @@ func (e *ApplicationEvent) Context() *ApplicationEventContext {
 //
 //	event.Cancel()
 func (e *ApplicationEvent) Cancel() {
+	if e == nil {
+		return
+	}
 	e.cancelled.Store(true)
 }
 
@@ -52,6 +55,9 @@ func (e *ApplicationEvent) Cancel() {
 //
 //	if event.IsCancelled() { return }
 func (e *ApplicationEvent) IsCancelled() bool {
+	if e == nil {
+		return false
+	}
 	return e.cancelled.Load()
 }
 
@@ -69,6 +75,9 @@ type CustomEvent struct {
 //
 //	event.Cancel()
 func (e *CustomEvent) Cancel() {
+	if e == nil {
+		return
+	}
 	e.cancelled.Store(true)
 }
 
@@ -76,6 +85,9 @@ func (e *CustomEvent) Cancel() {
 //
 //	if event.IsCancelled() { return }
 func (e *CustomEvent) IsCancelled() bool {
+	if e == nil {
+		return false
+	}
 	return e.cancelled.Load()
 }
 

stubs/wails/pkg/application/events_test.go

@@ -35,6 +35,15 @@ func TestEvents_CustomEvent_Ugly(t *testing.T) {
 	assert.Equal(t, []any{"a", 1}, event.Data)
 }
 
+func TestEvents_CustomEvent_NilReceiver(t *testing.T) {
+	var event *CustomEvent
+
+	assert.NotPanics(t, func() {
+		event.Cancel()
+	})
+	assert.False(t, event.IsCancelled())
+}
+
 func TestEvents_ApplicationEvent_Good(t *testing.T) {
 	event := &ApplicationEvent{Id: 7, ctx: newApplicationEventContext()}
 
@@ -60,6 +69,15 @@ func TestEvents_ApplicationEvent_Ugly(t *testing.T) {
 	assert.True(t, event.IsCancelled())
 }
 
+func TestEvents_ApplicationEvent_NilReceiver(t *testing.T) {
+	var event *ApplicationEvent
+
+	assert.NotPanics(t, func() {
+		event.Cancel()
+	})
+	assert.False(t, event.IsCancelled())
+}
+
 func TestEvents_EventManager_Emit_Good(t *testing.T) {
 	manager := newEventManager()
 	calls := 0