fix(chat): hide agent tab when course agent is disabled

src/renderer/src/features/workspace/WorkspaceQaPanel.tsx

@@ -142,8 +142,10 @@ export default function WorkspaceQaPanel({
   }
 
   useEffect(() => {
-    if (teacherQaDisabled && qaMode === 'teacher') onModeChange('ai')
-  }, [onModeChange, qaMode, teacherQaDisabled])
+    if ((teacherQaDisabled && qaMode === 'teacher') || (!agentStatusLoading && !agentEnabled && qaMode === 'agent')) {
+      onModeChange('ai')
+    }
+  }, [agentEnabled, agentStatusLoading, onModeChange, qaMode, teacherQaDisabled])
 
   useEffect(() => {
     if (!contextMenu) return
@@ -228,12 +230,12 @@ export default function WorkspaceQaPanel({
             <span className={['pointer-events-none absolute right-0 top-8 z-50 hidden whitespace-nowrap rounded-md border px-2 py-1 text-[11px] font-semibold shadow-[0_10px_24px_rgba(0,0,0,0.24)] group-hover:block', dark ? 'border-white/10 bg-[#303030] text-white/78' : 'border-[#d8dee9] bg-white text-[#4f596b]'].join(' ')}>{t("최소화")}</span>
           </button>
         </div>
-        <div className={['mt-3 grid grid-cols-3 overflow-hidden rounded-md border', borderSoft].join(' ')}>
+        <div className={['mt-3 grid overflow-hidden rounded-md border', agentEnabled ? 'grid-cols-3' : 'grid-cols-2', borderSoft].join(' ')}>
           {[
             { id: 'ai' as const, label: 'AI', Icon: Bot },
             { id: 'agent' as const, label: t("에이전트"), Icon: WandSparkles },
             { id: 'teacher' as const, label: t("강사"), Icon: User }
-          ].map(({ id, label, Icon }) => {
+          ].filter(({ id }) => id !== 'agent' || agentEnabled).map(({ id, label, Icon }) => {
             const disabled = id === 'teacher' && teacherQaDisabled
             const teacherTabFlash = id === 'teacher' && teacherChatFlash && !minimized && qaMode === 'ai'