重构会话agent连接、初始化、加载配置流程

src/components/chat/conversation-shell.tsx

@@ -34,6 +34,7 @@ interface ConversationShellProps {
   configOptions?: SessionConfigOptionInfo[]
   modeLoading?: boolean
   configOptionsLoading?: boolean
+  selectorsLoading?: boolean
   selectedModeId?: string | null
   onModeChange?: (modeId: string) => void
   onConfigOptionChange?: (configId: string, valueId: string) => void
@@ -73,6 +74,7 @@ export function ConversationShell({
   configOptions,
   modeLoading = false,
   configOptionsLoading = false,
+  selectorsLoading = false,
   selectedModeId,
   onModeChange,
   onConfigOptionChange,
@@ -117,6 +119,7 @@ export function ConversationShell({
           configOptions={configOptions}
           modeLoading={modeLoading}
           configOptionsLoading={configOptionsLoading}
+          selectorsLoading={selectorsLoading}
           selectedModeId={selectedModeId}
           onModeChange={onModeChange}
           onConfigOptionChange={onConfigOptionChange}