feat: Provider/Mistral full support for Mistral on OpenClaw 🇫🇷 (#23845)

* Onboard: add Mistral auth choice and CLI flags

* Onboard/Auth: add Mistral provider config defaults

* Auth choice: wire Mistral API-key flow

* Onboard non-interactive: support --mistral-api-key

* Media understanding: add Mistral Voxtral audio provider

* Changelog: note Mistral onboarding and media support

* Docs: add Mistral provider and onboarding/media references

* Tests: cover Mistral media registry/defaults and auth mapping

* Memory: add Mistral embeddings provider support

* Onboarding: refresh Mistral model metadata

* Docs: document Mistral embeddings and endpoints

* Memory: persist Mistral embedding client state in managers

* Memory: add regressions for mistral provider wiring

* Gateway: add live tool probe retry helper

* Gateway: cover live tool probe retry helper

* Gateway: retry malformed live tool-read probe responses

* Memory: support plain-text batch error bodies

* Tests: add Mistral Voxtral live transcription smoke

* Docs: add Mistral live audio test command

* Revert: remove Mistral live voice test and docs entry

* Onboard: re-export Mistral default model ref from models

* Changelog: credit joeVenner for Mistral work

* fix: include Mistral in auto audio key fallback

* Update CHANGELOG.md

* Update CHANGELOG.md

---------

Co-authored-by: Shakker <shakkerdroid@gmail.com>

src/memory/batch-error-utils.test.ts

@@ -16,6 +16,12 @@ describe("extractBatchErrorMessage", () => {
       extractBatchErrorMessage([{ response: { body: { error: { message: "nested-only" } } } }, {}]),
     ).toBe("nested-only");
   });
+
+  it("accepts plain string response bodies", () => {
+    expect(extractBatchErrorMessage([{ response: { body: "provider plain-text error" } }])).toBe(
+      "provider plain-text error",
+    );
+  });
 });
 
 describe("formatUnavailableBatchError", () => {