Fix Copied! visibility and remove URL hover effect

- Use visible gray (#888888) for "Copied!" text
- Remove hover color change from URL

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

gui/main_window.py

@@ -222,10 +222,6 @@ class MainWindow(QMainWindow):
                 border: none;
                 padding: 4px 8px;
             }}
-            QPushButton:hover {{
-                color: {THEME['accent_color']};
-                text-decoration: underline;
-            }}
         """)
         self.ip_label.clicked.connect(self.copy_url_to_clipboard)
         self.update_ip_label()
@@ -479,13 +475,13 @@ class MainWindow(QMainWindow):
 
         # Show "Copied!" feedback with dimmed style
         self.ip_label.setText("Copied!")
-        self.ip_label.setStyleSheet(f"""
-            QPushButton {{
+        self.ip_label.setStyleSheet("""
+            QPushButton {
                 background-color: transparent;
-                color: {THEME['highlight_color']};
+                color: #888888;
                 border: none;
                 padding: 4px 8px;
-            }}
+            }
         """)
 
         # Restore original URL after delay
@@ -500,10 +496,6 @@ class MainWindow(QMainWindow):
                 border: none;
                 padding: 4px 8px;
             }}
-            QPushButton:hover {{
-                color: {THEME['accent_color']};
-                text-decoration: underline;
-            }}
         """)
         self.update_ip_label()