feat(i18n): update chat localization strings to enhance user experience and clarity (#424)

src/i18n/locales/en/chat.json

@@ -3,11 +3,12 @@
     "gatewayRequired": "The OpenClaw Gateway needs to be running to use chat. It will start automatically, or you can start it from Settings.",
     "welcome": {
         "title": "ClawX Chat",
-        "subtitle": "Your AI assistant is ready. Start a conversation below.",
-        "askQuestions": "Ask Questions",
-        "askQuestionsDesc": "Get answers on any topic",
-        "creativeTasks": "Creative Tasks",
-        "creativeTasksDesc": "Writing, brainstorming, ideas"
+        "subtitle": "What can I do for you?",
+        "askQuestions": "Handle Tasks",
+        "askQuestionsDesc": "Work on task-oriented requests",
+        "creativeTasks": "Continuous Execution",
+        "creativeTasksDesc": "Keep running through multi-step work",
+        "brainstorming": "Multi-Agent Parallel"
     },
     "noLogs": "(No logs available yet)",
     "toolbar": {