feat(usage): add minimax usage snapshot

src/infra/provider-usage.auth.ts

@@ -74,6 +74,35 @@ function resolveZaiApiKey(): string | undefined {
   }
 }
 
+function resolveMinimaxApiKey(): string | undefined {
+  const envDirect =
+    process.env.MINIMAX_CODE_PLAN_KEY?.trim() ||
+    process.env.MINIMAX_API_KEY?.trim();
+  if (envDirect) return envDirect;
+
+  const envResolved = resolveEnvApiKey("minimax");
+  if (envResolved?.apiKey) return envResolved.apiKey;
+
+  const cfg = loadConfig();
+  const key = getCustomProviderApiKey(cfg, "minimax");
+  if (key) return key;
+
+  const store = ensureAuthProfileStore();
+  const apiProfile = listProfilesForProvider(store, "minimax").find((id) => {
+    const cred = store.profiles[id];
+    return cred?.type === "api_key" || cred?.type === "token";
+  });
+  if (!apiProfile) return undefined;
+  const cred = store.profiles[apiProfile];
+  if (cred?.type === "api_key" && cred.key?.trim()) {
+    return cred.key.trim();
+  }
+  if (cred?.type === "token" && cred.token?.trim()) {
+    return cred.token.trim();
+  }
+  return undefined;
+}
+
 async function resolveOAuthToken(params: {
   provider: UsageProviderId;
   agentDir?: string;
@@ -182,6 +211,11 @@ export async function resolveProviderAuths(params: {
       if (apiKey) auths.push({ provider, token: apiKey });
       continue;
     }
+    if (provider === "minimax") {
+      const apiKey = resolveMinimaxApiKey();
+      if (apiKey) auths.push({ provider, token: apiKey });
+      continue;
+    }
 
     if (!oauthProviders.includes(provider)) continue;
     const auth = await resolveOAuthToken({