chore(vendor): import pi 0.85.1

Imported as a linear vendor commit so forge rebases do not replay the upstream root tree.

git-subtree-dir: third_party/pi

git-subtree-split: d981de1229ef899957bbe968bc8dcda02a21f477

third_party/pi/packages/ai/src/bun-oauth.ts

@@ -0,0 +1,21 @@
+import { anthropicOAuth } from "./auth/oauth/anthropic.ts";
+import { githubCopilotOAuth } from "./auth/oauth/github-copilot.ts";
+import { kimiCodingOAuth } from "./auth/oauth/kimi-coding.ts";
+import { registerBundledOAuthFlowLoaders } from "./auth/oauth/load.ts";
+import { openaiCodexOAuth } from "./auth/oauth/openai-codex.ts";
+import { openRouterOAuth } from "./auth/oauth/openrouter.ts";
+import { createRadiusOAuth } from "./auth/oauth/radius.ts";
+import { xaiOAuth } from "./auth/oauth/xai.ts";
+
+/** Register OAuth flows statically embedded in the standalone Bun binary. */
+export function registerBunOAuthFlows(): void {
+	registerBundledOAuthFlowLoaders({
+		anthropic: () => anthropicOAuth,
+		openaiCodex: () => openaiCodexOAuth,
+		githubCopilot: () => githubCopilotOAuth,
+		openrouter: () => openRouterOAuth,
+		kimiCoding: () => kimiCodingOAuth,
+		xai: () => xaiOAuth,
+		radius: createRadiusOAuth,
+	});
+}