fix: hide agent file attachments for A-Copilot

src/renderer/src/App.tsx

@@ -627,6 +627,7 @@ function LocalPcWorkspaceMockup({
   const [selectedModule, setSelectedModule] = useState<ModuleRow | null>(null)
   const {
     enabled: agentEnabled,
+    provider: agentProvider,
     imagesEnabled: agentImagesEnabled,
     statusLoading: agentStatusLoading,
     pending: agentPending,
@@ -4713,6 +4714,7 @@ function LocalPcWorkspaceMockup({
           visibleTeacherMessages={visibleTeacherMessages}
           agentMessages={agentMessages}
           agentEnabled={agentEnabled}
+          agentProvider={agentProvider}
           agentImagesEnabled={Boolean(agentImagesEnabled)}
           agentStatusLoading={agentStatusLoading}
           agentPending={agentPending}

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

@@ -41,6 +41,7 @@ type WorkspaceQaPanelProps = {
   visibleTeacherMessages: WorkspaceQaMessage[]
   agentMessages: AgentConversationMessage[]
   agentEnabled: boolean
+  agentProvider?: string | null
   agentImagesEnabled?: boolean
   agentStatusLoading: boolean
   agentPending: boolean
@@ -114,6 +115,7 @@ export default function WorkspaceQaPanel({
   visibleTeacherMessages,
   agentMessages,
   agentEnabled,
+  agentProvider,
   agentImagesEnabled = false,
   agentStatusLoading,
   agentPending,
@@ -327,7 +329,7 @@ export default function WorkspaceQaPanel({
         disabled={inputDisabled || (teacherQaDisabled && qaMode === 'teacher')}
         onStop={onStop}
         onSubmit={onSubmit}
-        attachmentsEnabled={qaMode === 'agent'}
+        attachmentsEnabled={qaMode === 'agent' && agentProvider !== 'A_COPILOT'}
         imagesEnabled={qaMode === 'agent' && agentImagesEnabled}
         onClearConversation={requestClearConversation}
         clearDisabled={clearDisabled}