🎨 优化角色卡编辑功能，新增正则编辑和测试

Signed-off-by: Echo <1711788888@qq.com>

web-app/src/components/ChatArea.tsx

@@ -627,7 +627,7 @@ export default function ChatArea({ conversation, character, onConversationUpdate
                   </div>
                 )}
 
-                <div className={`max-w-[70%] min-w-0 flex flex-col ${msg.role === 'user' ? 'items-end' : 'items-start'}`}>
+                <div className={`min-w-0 flex flex-col ${msg.role === 'user' ? 'max-w-[70%] items-end' : 'w-[70%] items-start'}`}>
                   {/* 助手名称 */}
                   {msg.role === 'assistant' && (
                     <span className="text-xs text-white/40 mb-1 ml-1">{character.name}</span>
@@ -638,7 +638,7 @@ export default function ChatArea({ conversation, character, onConversationUpdate
                     className={`relative px-4 py-3 rounded-2xl ${
                       msg.role === 'user'
                         ? 'bg-primary/25 border border-primary/20 rounded-br-md'
-                        : 'glass rounded-bl-md'
+                        : 'glass rounded-bl-md w-full'
                     }`}
                     style={{ wordBreak: 'break-word', overflowWrap: 'anywhere' }}
                   >