feat: add servers persistence to MCP connection component, add MCP connections settings page (#8388)

* Added mcpinput to the backend

* Fixed list selection component to contain descriptions

* Added mcp component in the frontend with mock values

* Added mcp rendering on Parameter Render Component

* Changed input to be more concise and to have dynamic placeholder

* Added header search placeholder

* Fixed styling to match new input

* Removed unused params

* Adds AddMcpServerModal's first mock version

* Adds Add button on mcp component and list selection component

* First pass at mcp api

* Add PATCH endpoint

* Add DELETE endpoint

* fix: Bump version numbers for langflow and langflow-base to 1.4.3 and 0.4.3 respectively

* fix: Remove Igor Carvalho from maintainers list in pyproject.toml

* fix(agent): reset model list when provider changes

Switching the provider in the Agent component sometimes left models from
the previous provider visible/selected.
We now filter  against the new , ensuring only
models that belong to the active provider remain.

* src/frontend/src/components/core/dropdownComponent/index.tsx
  – add  guard when rebuilding

* tests/extended/regression/general-bugs-dropdown-select-not-in-list.spec.ts
  – expand coverage for “model not in list” edge-cases

Co-authored-by: Cristian Lousa <cristian.lousa@gmail.com>

* fix: Update Pokédex Agent template (#8373)

* Implement adding and getting MCP servers, implemented addMcpServerModal

* Added sse and stdio ways of adding a server

* Added no actions handling

* added new mcp type to constants

* Added headers to add mcp server modal

* Changed mcp component to allow persistent mcp servers

* fix input list component gradient

* fix add server modal to patch when initial data is present, and to clean variables when switching tabs

* changed message on add mcp server

* Added required mutations for mcp page

* Added mcp servers page

* Changed design of page

* Fixed delete problems and added delete confirmation

* fixed wrong error parsing

* changed padding

* Made added server be used on mcp component

* refactor: remove references to the langflow store (#8354)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: KimberlyFields <46325568+KimberlyFields@users.noreply.github.com>
Co-authored-by: Ítalo Johnny <italojohnnydosanjos@gmail.com>
Co-authored-by: Mendon Kissling <59585235+mendonk@users.noreply.github.com>
fix: apikey lock issue and add option to disable tracking (#8361)

* Fixed search on sidebar

* fixed infinite use effect

* Fixed error handling

* Fixed tool mode disappearing

* fixed key pair button submitting form

* Fixed bugs

* Added required

* Changed message

* Disabled other tabs when modifying

* Removed tool dropdown if the mcp server is empty

* parsed name

* fixed data test id not applying

* fixed mcp component

* Fixed component not working when only stdio command is present

* refactored tests

* Updated mcp_component to remove old non default keys

* Added data-testids

* Modified tests to include settings page functionality

* [autofix.ci] apply automated fixes

* Refactor out the core part of the mcp

* [autofix.ci] apply automated fixes

* Added placeholders on frontend components for errors

* Fixed bugs with mcp component

* updated bug

* fix: made empty project appear instead of empty flows list when mcp is enabled (#8336)

* try to fix

* Fix MCP persistence

* Update mcp_component.py

* Update mcp.py

* [autofix.ci] apply automated fixes

* fix: Bump version numbers for langflow and langflow-base to 1.4.3 and 0.4.3 respectively

* fix: Remove Igor Carvalho from maintainers list in pyproject.toml

* fix(agent): reset model list when provider changes

Switching the provider in the Agent component sometimes left models from
the previous provider visible/selected.
We now filter  against the new , ensuring only
models that belong to the active provider remain.

* src/frontend/src/components/core/dropdownComponent/index.tsx
  – add  guard when rebuilding

* tests/extended/regression/general-bugs-dropdown-select-not-in-list.spec.ts
  – expand coverage for “model not in list” edge-cases

Co-authored-by: Cristian Lousa <cristian.lousa@gmail.com>

* refactor: remove references to the langflow store (#8354)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: KimberlyFields <46325568+KimberlyFields@users.noreply.github.com>
Co-authored-by: Ítalo Johnny <italojohnnydosanjos@gmail.com>
Co-authored-by: Mendon Kissling <59585235+mendonk@users.noreply.github.com>
fix: apikey lock issue and add option to disable tracking (#8361)

* fix: made empty project appear instead of empty flows list when mcp is enabled (#8336)

* fix mcp client async problems

* fixed mcp sse access

* [autofix.ci] apply automated fixes

* Made values be maintained when refreshing page

* Fixed bugs with tool mode and switching from tool mode to not tool mode

* Update mcp_component.py

* Update test_mcp_component.py

* Don't expose file by name as external endpoint

* Update files.py

* Update files.py

* Add checks for id

* Refactor tests

* Update test_mcp_component.py

* Update test_mcp_component.py

* Update test_mcp_component.py

* updated tests

* re-added placeholder on input for tests to not fail

* updated session selector in order for tests to work

---------

Co-authored-by: Eric Hare <ericrhare@gmail.com>
Co-authored-by: Gabriel Luiz Freitas Almeida <gabriel@langflow.org>
Co-authored-by: Mike Fortman <michael.fortman@datastax.com>
Co-authored-by: Cristian Lousa <cristian.lousa@gmail.com>
Co-authored-by: Edwin Jose <edwin.jose@datastax.com>
Co-authored-by: Deon Sanchez <69873175+deon-sanchez@users.noreply.github.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: KimberlyFields <46325568+KimberlyFields@users.noreply.github.com>
Co-authored-by: Ítalo Johnny <italojohnnydosanjos@gmail.com>
Co-authored-by: Mendon Kissling <59585235+mendonk@users.noreply.github.com>

src/frontend/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "langflow",
-  "version": "1.4.2",
+  "version": "1.4.3",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "langflow",
-      "version": "1.4.2",
+      "version": "1.4.3",
       "dependencies": {
         "@chakra-ui/number-input": "^2.1.2",
         "@headlessui/react": "^2.0.4",
@@ -755,7 +755,6 @@
     },
     "node_modules/@clack/prompts/node_modules/is-unicode-supported": {
       "version": "1.3.0",
-      "extraneous": true,
       "inBundle": true,
       "license": "MIT",
       "engines": {