👻 refactor: LocalStorage Cleanup and MCP State Optimization (#9528)

* 👻 refactor: MCP Select State with Jotai Atoms

* refactor: Implement timestamp management for ChatArea localStorage entries

* refactor: Integrate MCP Server Manager into BadgeRow context and components to avoid double-calling within BadgeRow

* refactor: add try/catch

* chore: remove comment

client/src/store/mcp.ts

@@ -0,0 +1,20 @@
+import { atomFamily, atomWithStorage } from 'jotai/utils';
+import { Constants, LocalStorageKeys } from 'librechat-data-provider';
+
+/**
+ * Creates a storage atom for MCP values per conversation
+ * Uses atomFamily to create unique atoms for each conversation ID
+ */
+export const mcpValuesAtomFamily = atomFamily((conversationId: string | null) => {
+  const key = conversationId ?? Constants.NEW_CONVO;
+  const storageKey = `${LocalStorageKeys.LAST_MCP_}${key}`;
+
+  return atomWithStorage<string[]>(storageKey, [], undefined, { getOnInit: true });
+});
+
+/**
+ * Global storage atom for MCP pinned state (shared across all conversations)
+ */
+export const mcpPinnedAtom = atomWithStorage<boolean>(LocalStorageKeys.PIN_MCP_, true, undefined, {
+  getOnInit: true,
+});