Support Claude Code Max via OAuth token

Pass CLAUDE_CODE_OAUTH_TOKEN to workspaces so they use the Max
subscription instead of pay-per-use API credits. Falls back to
ANTHROPIC_API_KEY if OAuth token not set.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/config.ts

@@ -11,8 +11,10 @@ export interface Config {
   giteaDevToken: string;
   /** Gitea API token for the review bot account */
   giteaReviewToken: string;
-  /** Anthropic API key passed to Claude Code in workspaces */
+  /** Anthropic API key passed to Claude Code in workspaces (fallback) */
   anthropicApiKey: string;
+  /** Claude Code OAuth token for Max subscription (preferred) */
+  claudeOauthToken: string;
   /** Username of the dev bot (to filter out self-replies) */
   botDevUsername: string;
   /** Username of the review bot (to filter out self-replies) */
@@ -41,7 +43,8 @@ export function loadConfig(): Config {
     coderTemplateId: required("CODER_TEMPLATE_ID"),
     giteaDevToken: required("GITEA_DEV_TOKEN"),
     giteaReviewToken: required("GITEA_REVIEW_TOKEN"),
-    anthropicApiKey: required("ANTHROPIC_API_KEY"),
+    anthropicApiKey: process.env.ANTHROPIC_API_KEY || "",
+    claudeOauthToken: process.env.CLAUDE_OAUTH_TOKEN || "",
     botDevUsername: process.env.BOT_DEV_USERNAME || "claude-dev",
     botReviewUsername: process.env.BOT_REVIEW_USERNAME || "claude-review",
     giteaUrl: process.env.GITEA_URL || "https://gitea.samson.media",