Merge origin/master (v0.5.75) into gitea/new_feature

Resolve conflicts:
- package.json / cli/package.json: take 0.5.75
- .gitignore: union both sides (upstream 9router-*/temp files + local state dirs)
- CHANGELOG.md: keep both blocks, v0.5.75 above v0.5.70
- nonStreamingHandler.js: merge imports (unwrapClineEnvelope +
  tokensForDetail/shouldPersistRequestDetail); drop dead appendRequestLog
- providers/[id]/page.js: union useState blocks (compatible-model states
  + importingClineModels)

Co-authored-by: CommandCodeBot <noreply@commandcode.ai>

tests/unit/xai-video-handler.test.js

@@ -29,6 +29,7 @@ vi.mock("@/sse/services/auth.js", () => authMocks);
 vi.mock("@/sse/services/tokenRefresh.js", () => tokenMocks);
 vi.mock("@/lib/localDb", () => ({
   getSettings: vi.fn(async () => ({ requireApiKey: false })),
+  getProviderConnectionById: vi.fn(async () => ({ id: "conn-5", provider: "xai" })),
   getComboByName: vi.fn(async () => null),
   getModelAliases: vi.fn(async () => ({})),
   getProviderNodes: vi.fn(async () => []),