Merge remote-tracking branch 'origin/master' into gitea/feature/end

Resolved conflicts taking origin/master (v0.5.55) as canonical, with local
features re-applied:
- runtime log level (LOG_LEVEL env + dashboard Settings → Logging, applied
  immediately and persisted across restarts)
- free/noAuth provider enable/disable toggle via providerStrategies.enabled
- parallel model testing (Test All Models / Test Selected Keys)

open-sse/providers/registry/xai.js

@@ -32,9 +32,13 @@ export default {
     { id: "grok-code-fast-1", name: "Grok Code Fast" },
     { id: "grok-3", name: "Grok 3" },
     { id: "grok-2-image-1212", name: "Grok 2 Image", params: ["n","response_format"], kind: "image" },
+    { id: "grok-imagine-video", name: "Grok Imagine Video", params: ["duration","aspect_ratio","resolution"], kind: "video" },
   ],
-  serviceKinds: ["llm","imageToText","webSearch","image"],
+  serviceKinds: ["llm","imageToText","webSearch","image","video"],
   imageConfig: { baseUrl: "https://api.x.ai/v1/images/generations", bodyFields: ["model","prompt","n","response_format"] },
+  // Async video jobs (POST returns { request_id }, GET polls until done/failed).
+  // Docs: https://docs.x.ai/developers/rest-api-reference/inference/videos
+  videoConfig: { baseUrl: "https://api.x.ai/v1/videos" },
   searchViaChat: {
     defaultModel: "grok-4.20-reasoning",
     endpoint: "https://api.x.ai/v1/responses",