core/wayland: thread-safety meta fixes + cleanups + hypr workaround

- fork go-wayland/client and modify to make it thread-safe internally
- use sync.Map and atomic values in many places to cut down on mutex
  boilerplate
- do not create extworkspace client unless explicitly requested

core/internal/server/extworkspace/manager.go

@@ -6,7 +6,7 @@ import (
 
 	"github.com/AvengeMedia/DankMaterialShell/core/internal/log"
 	"github.com/AvengeMedia/DankMaterialShell/core/internal/proto/ext_workspace"
-	wlclient "github.com/yaslama/go-wayland/wayland/client"
+	wlclient "github.com/AvengeMedia/DankMaterialShell/core/pkg/go-wayland/wayland/client"
 )
 
 func NewManager(display *wlclient.Display) (*Manager, error) {
@@ -19,8 +19,8 @@ func NewManager(display *wlclient.Display) (*Manager, error) {
 		workspaces:  make(map[uint32]*workspaceState),
 		cmdq:        make(chan cmd, 128),
 		stopChan:    make(chan struct{}),
-		subscribers: make(map[string]chan State),
-		dirty:       make(chan struct{}, 1),
+
+		dirty: make(chan struct{}, 1),
 	}
 
 	m.wg.Add(1)
@@ -389,14 +389,6 @@ func (m *Manager) notifier() {
 			if !pending {
 				continue
 			}
-			m.subMutex.RLock()
-			subCount := len(m.subscribers)
-			m.subMutex.RUnlock()
-
-			if subCount == 0 {
-				pending = false
-				continue
-			}
 
 			currentState := m.GetState()
 
@@ -405,15 +397,15 @@ func (m *Manager) notifier() {
 				continue
 			}
 
-			m.subMutex.RLock()
-			for _, ch := range m.subscribers {
+			m.subscribers.Range(func(key, value interface{}) bool {
+				ch := value.(chan State)
 				select {
 				case ch <- currentState:
 				default:
 					log.Warn("ExtWorkspace: subscriber channel full, dropping update")
 				}
-			}
-			m.subMutex.RUnlock()
+				return true
+			})
 
 			stateCopy := currentState
 			m.lastNotified = &stateCopy
@@ -564,12 +556,12 @@ func (m *Manager) Close() {
 	m.wg.Wait()
 	m.notifierWg.Wait()
 
-	m.subMutex.Lock()
-	for _, ch := range m.subscribers {
+	m.subscribers.Range(func(key, value interface{}) bool {
+		ch := value.(chan State)
 		close(ch)
-	}
-	m.subscribers = make(map[string]chan State)
-	m.subMutex.Unlock()
+		m.subscribers.Delete(key)
+		return true
+	})
 
 	m.workspacesMutex.Lock()
 	for _, ws := range m.workspaces {