🗝️ feat: User Provided Credentials for MCP Servers (#7980)

* 🗝️ feat: Per-User Credentials for MCP Servers

chore: add aider to gitignore

feat: fill custom variables to MCP server

feat: replace placeholders with custom user MCP variables

feat: handle MCP install/uninstall (uses pluginauths)

feat: add MCP custom variables dialog to MCPSelect

feat: add MCP custom variables dialog to the side panel

feat: do not require to fill MCP credentials for in tools dialog

feat: add translations keys (en+cs) for custom MCP variables

fix: handle LIBRECHAT_USER_ID correctly during MCP var replacement

style: remove unused MCP translation keys

style: fix eslint for MCP custom vars

chore: move aider gitignore to AI section

* feat: Add Plugin Authentication Methods to data-schemas

* refactor: Replace PluginAuth model methods with new utility functions for improved code organization and maintainability

* refactor: Move IPluginAuth interface to types directory for better organization and update pluginAuth schema to use the new import

* refactor: Remove unused getUsersPluginsAuthValuesMap function and streamline PluginService.js; add new getPluginAuthMap function for improved plugin authentication handling

* chore: fix typing for optional tools property with GenericTool[] type

* chore: update librechat-data-provider version to 0.7.88

* refactor: optimize getUserMCPAuthMap function by reducing variable usage and improving server key collection logic

* refactor: streamline MCP tool creation by removing customUserVars parameter and enhancing user-specific authentication handling to avoid closure encapsulation

* refactor: extract processSingleValue function to streamline MCP environment variable processing and enhance readability

* refactor: enhance MCP tool processing logic by simplifying conditions and improving authentication handling for custom user variables

* ci: fix action tests

* chore: fix imports, remove comments

* chore: remove non-english translations

* fix: remove newline at end of translation.json file

---------

Co-authored-by: Aleš Kůtek <kutekales@gmail.com>

client/src/locales/en/translation.json

@@ -423,6 +423,8 @@
   "com_nav_log_out": "Log out",
   "com_nav_long_audio_warning": "Longer texts will take longer to process.",
   "com_nav_maximize_chat_space": "Maximize chat space",
+  "com_nav_mcp_vars_update_error": "Error updating MCP custom user variables: {{0}}",
+  "com_nav_mcp_vars_updated": "MCP custom user variables updated successfully.",
   "com_nav_modular_chat": "Enable switching Endpoints mid-conversation",
   "com_nav_my_files": "My Files",
   "com_nav_not_supported": "Not Supported",
@@ -447,6 +449,7 @@
   "com_nav_setting_chat": "Chat",
   "com_nav_setting_data": "Data controls",
   "com_nav_setting_general": "General",
+  "com_nav_setting_mcp": "MCP Settings",
   "com_nav_setting_personalization": "Personalization",
   "com_nav_setting_speech": "Speech",
   "com_nav_settings": "Settings",
@@ -480,8 +483,15 @@
   "com_sidepanel_conversation_tags": "Bookmarks",
   "com_sidepanel_hide_panel": "Hide Panel",
   "com_sidepanel_manage_files": "Manage Files",
+  "com_sidepanel_mcp_enter_value": "Enter value for {{0}}",
+  "com_sidepanel_mcp_no_servers_with_vars": "No MCP servers with configurable variables.",
+  "com_sidepanel_mcp_variables_for": "MCP Variables for {{0}}",
   "com_sidepanel_parameters": "Parameters",
   "com_sources_image_alt": "Search result image",
+  "com_ui_configure_mcp_variables_for": "Configure Variables for {{0}}",
+  "com_ui_mcp_dialog_desc": "Please enter the necessary information below.",
+  "com_ui_mcp_enter_var": "Enter value for {{0}}",
+  "com_ui_saving": "Saving...",
   "com_sources_more_sources": "+{{count}} sources",
   "com_sources_tab_all": "All",
   "com_sources_tab_images": "Images",
@@ -570,6 +580,7 @@
   "com_ui_authentication_type": "Authentication Type",
   "com_ui_avatar": "Avatar",
   "com_ui_azure": "Azure",
+  "com_ui_back": "Back",
   "com_ui_back_to_chat": "Back to Chat",
   "com_ui_back_to_prompts": "Back to Prompts",
   "com_ui_backup_codes": "Backup Codes",
@@ -795,6 +806,7 @@
   "com_ui_manage": "Manage",
   "com_ui_max_tags": "Maximum number allowed is {{0}}, using latest values.",
   "com_ui_mcp_servers": "MCP Servers",
+  "com_ui_mcp_server_not_found": "Server not found.",
   "com_ui_memories": "Memories",
   "com_ui_memories_allow_create": "Allow creating Memories",
   "com_ui_memories_allow_opt_out": "Allow users to opt out of Memories",
@@ -1020,6 +1032,7 @@
   "com_user_message": "You",
   "com_warning_resubmit_unsupported": "Resubmitting the AI message is not supported for this endpoint.",
   "com_ui_add_mcp": "Add MCP",
+  "com_ui_add_mcp": "Add MCP",
   "com_ui_add_mcp_server": "Add MCP Server",
   "com_ui_edit_mcp_server": "Edit MCP Server",
   "com_agents_mcps_disabled": "You need to create an agent before adding MCPs.",