Improve look of start screen and add toast to copy room ID button

desktop-client/check.svg

@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="#4BB543" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+    <polyline points="20 6 9 17 4 12"></polyline>
+</svg>

desktop-client/copy.svg

@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="#aaaaaa" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+    <rect x="9" y="9" width="13" height="13" rx="2" ry="2"></rect>
+    <path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"></path>
+</svg>

desktop-client/main.py

@@ -168,7 +168,11 @@ class VlcSyncApp(QMainWindow):
         topbar_layout = QHBoxLayout(self.topbar)
         
         self.room_code_display = QLabel("Room: XXXX")
-        self.copy_code_btn = QPushButton("📋")
+        self.copy_code_btn = QPushButton()
+        self.copy_code_btn.setObjectName("iconBtn")
+        self.copy_icon = QIcon(os.path.join(os.path.dirname(__file__), "copy.svg"))
+        self.check_icon = QIcon(os.path.join(os.path.dirname(__file__), "check.svg"))
+        self.copy_code_btn.setIcon(self.copy_icon)
         self.copy_code_btn.setFixedSize(30, 30)
         self.copy_code_btn.setToolTip("Copy Room Code")
         self.copy_code_btn.clicked.connect(self.copy_room_code)
@@ -225,7 +229,7 @@ class VlcSyncApp(QMainWindow):
         # Fullscreen
         self.fullscreen_btn = QPushButton("⛶")
         self.fullscreen_btn.setFixedSize(40, 40)
-        self.fullscreen_btn.setObjectName("fullscreenBtn")
+        self.fullscreen_btn.setObjectName("iconBtn")
         self.fullscreen_btn.clicked.connect(self.toggle_fullscreen)
         
         controls_layout.addWidget(self.play_btn)
@@ -373,8 +377,23 @@ class VlcSyncApp(QMainWindow):
     def copy_room_code(self):
         if self.room_code:
             QApplication.clipboard().setText(self.room_code)
-            self.copy_code_btn.setText("✓")
+            self.copy_code_btn.setIcon(self.check_icon)
-            QTimer.singleShot(2000, lambda: self.copy_code_btn.setText("📋"))
+            
+            # Show floating tooltip for feedback
+            toast = QLabel("Copied!", self)
+            toast.setStyleSheet("background-color: #4BB543; color: white; padding: 4px 8px; border-radius: 4px; font-weight: bold;")
+            toast.setWindowFlags(Qt.WindowType.ToolTip | Qt.WindowType.FramelessWindowHint)
+            
+            # Position the toast slightly below the button
+            pos = self.copy_code_btn.mapToGlobal(self.copy_code_btn.rect().bottomLeft())
+            toast.move(pos.x(), pos.y() + 5)
+            toast.show()
+            
+            def reset():
+                self.copy_code_btn.setIcon(self.copy_icon)
+                toast.deleteLater()
+                
+            QTimer.singleShot(1500, reset)
 
     def check_inputs(self):
         has_name = len(self.username_input.text().strip()) > 0
@@ -610,6 +629,7 @@ class VlcSyncApp(QMainWindow):
                 color: #aaaaaa;
                 font-weight: bold;
                 font-size: 12px;
+                background-color: transparent;
             }
             
             #fileInfo {
@@ -639,6 +659,16 @@ class VlcSyncApp(QMainWindow):
                 padding: 10px 16px;
                 font-weight: bold;
                 font-size: 14px;
+                background-color: #272727;
+                color: white;
+                border: 1px solid #444;
+            }
+            QPushButton:hover {
+                background-color: #333;
+            }
+            QPushButton:disabled {
+                border-color: #222;
+                color: #666;
             }
             
             #primaryBtn {
@@ -654,17 +684,13 @@ class VlcSyncApp(QMainWindow):
                 color: #666;
             }
             
-            #secondaryBtn {
+            #iconBtn {
-                background-color: #272727;
+                background-color: transparent;
-                color: white;
+                border: none;
-                border: 1px solid #444;
+                padding: 5px;
             }
-            #secondaryBtn:hover {
+            #iconBtn:hover {
-                background-color: #333;
+                background-color: rgba(255, 255, 255, 0.1);
-            }
-            #secondaryBtn:disabled {
-                border-color: #222;
-                color: #666;
             }
             
             #dangerBtn {